JP4547592B2 - Image recording / reproducing apparatus and method, recording medium, and program - Google Patents

Description

【０１３７】
そして、上記式（８）を用いて垂直方向のサイズVSIZEが算出される途中に得られる垂直方向の拡大すべき領域のサイズVIPがRAMに保存される。このサイズVIPは、後述する垂直方向の拡大演算終了のタイミングもしくはトリミング時の移動量の算出時に必要とされる。
【０１３８】
ステップＳ１２３において、カメラ制御マイコン４は、水平方向の拡大すべき領域のサイズHIP、および拡大演算開始点のｙ座標Hremを算出する。
【０１３９】
すなわち、図１６に示されるように、垂直方向のサイズがVSIZE、水平方向のサイズがHSIZEの外部入力信号から、次式（９）に従って、点Ａの座標（０，０）とした場合の拡大演算開始点Ａ´のｙ座標Hremが算出される。ここで、変数HOPは、出力信号の水平方向のサイズとされる。

【０１４０】
そして、上記式（９）を用いて水平方向のサイズHSIZEが算出される途中に得られる水平方向の拡大すべき領域のサイズHIPがRAMに保存される。このサイズHIPは、後述する水平方向の拡大演算終了のタイミングもしくはトリミング時の移動量の算出時に必要とされる。
【０１４１】
上記式（８）および上記式（９）において、拡大演算開始点Ａ´のｘ座標Vremおよびｙ座標Hremは、１／β画素単位で算出される。すなわち、算出されるVremおよびHremの１桁は、１／β画素に相当する。
【０１４２】
ステップＳ１２４において、カメラ制御マイコン４は、拡大中心移動量用の垂直方向のリミット値MoveLimit_vおよび水平方向のリミット値MoveLimit_hを、次式（１０）および次式（１１）に従って算出する。このリミット値とは、ユーザがトリミング用に拡大領域を中心から動かす場合、どこまで動かすことができるかを示す値であり、垂直方向のリミット値MoveLimit_vは、拡大演算開始点Ａ´のｘ座標Vremにほぼ相当し、水平方向のリミット値MoveLimit_hは、拡大演算開始点Ａ´のｙ座標Hremにほぼ相当する。
MoveLimit_v＝Vrem−Ａ（Ａ＞０） ・・・（１０）
MoveLimit_h＝Hrem−Ｂ（Ｂ＞０） ・・・（１１）
【０１４３】
なお、変数Ａおよび変数Ｂは、画素変換処理部１３が処理するタップ数に基づいて、決定される値である。
【０１４４】
ところで、入力信号の垂直方向のサイズVSIZE、入力信号の水平方向のサイズHSIZE、出力信号の垂直方向のサイズVOP、および出力信号の水平方向のサイズHOPは、外部入力信号の種類により、その値が異なる。
【０１４５】
そこで、図１５のステップＳ１２２およびＳ１２３の算出処理（式（８）および式（９））に用いられるVSIZE、HSIZE、VOP、およびHOPは、ステップＳ１２１の処理で取得された入力信号情報（すなわち、テープ再生により得られる入力信号、ライン入力信号、もしくはDV入力信号などの入力信号の種類を示す情報）に基づいて、予め用意されたテーブルから取得される。
【０１４６】
図１２に戻り、ステップＳ８２において、カメラ制御マイコン４は、ユーザが所望する領域を拡大するために、ヒューマンインターフェースマイコン５より取得した回転ダイヤル４４の回転方向を示す移動量情報（フラグUP、フラグDOWM、フラグRIGHT、もしくはフラグLEFTなどの情報）を用いて、拡大中心移動量を算出する。ステップＳ８３において、カメラ制御マイコン４は、ステップＳ８１の処理で算出された各種パラメータ（垂直方向のリミット値MoveLimit_vおよび水平方向のリミット値MoveLimit_h）に、ステップＳ８２の処理で算出された拡大中心移動量を反映させて最終的な拡大領域を決定し、最終的な各種パラメータを算出する。
【０１４７】
ここで、図１７および図１８のフローチャートを参照して、図１２のステップＳ８１，Ｓ８２の拡大中心移動量および最終的な各種パラメータの算出処理について詳しく説明する。
【０１４８】
ステップＳ１３１において、カメラ制御マイコン４は、垂直方向の初期値をVstart０＝Vremに設定する。ステップＳ１３２において、カメラ制御マイコン４は、回転ダイヤル４４の１パルスあたりの垂直方向の移動量ΔMove_vを算出する。
【０１４９】
ここで、垂直方向の移動量ΔMove_vとは、図１９に示すように、垂直方向の拡大領域VIPをＭ分割したサイズを、１パルスあたりの移動量として返すような値である。このように、１パルスあたりの移動量を、拡大領域VIPをＭ分割した値（すなわち、ΔMove_v＝VIP／Ｍ）に常に設定しておくことにより、倍率に関係なく出力画像に対する移動量比率を一定に保つことが可能になる。
【０１５０】
ステップＳ１３３において、カメラ制御マイコン４は、ユーザインターフェースマイコン５より取得した回転ダイヤル４４の移動量情報に基づいて、ユーザにより、画面上側への移動が指示されたか否か、すなわち、フラグUP＝１であるか否かを判定し、画面上側への移動が指示されたと判定した場合、ステップＳ１３４に進み、垂直方向の中心移動量Move_vから垂直移動量ΔMove_vを減算する。
【０１５１】
ステップＳ１３３において、ユーザにより、画面上側への移動が指示されていないと判定された場合、すなわち、フラグUP＝０であると判定された場合、ステップＳ１３４の処理がスキップされ、処理は、ステップＳ１３５に進む。
【０１５２】
ステップＳ１３５において、カメラ制御マイコン４は、ユーザインターフェースマイコン５より取得した回転ダイヤル４４の移動量情報に基づいて、ユーザにより、画面下側への移動が指示されたか否か、すなわち、フラグDOWN＝１であるか否かを判定し、画面下側への移動が指示されたと判定した場合、ステップＳ１３６に進み、垂直方向の中心移動量Move_vに垂直移動量ΔMove_vを加算する。
【０１５３】
ステップＳ１３５において、ユーザにより、画面下側への移動が指示されていないと判定された場合、すなわち、フラグDOWN＝０であると判定された場合、ステップＳ１３６の処理はスキップされ、処理は、ステップＳ１３７に進む。
【０１５４】
ステップＳ１３７において、カメラ制御マイコン４は、算出された垂直方向の中心移動量Move_vの絶対値が垂直方向の拡大中心移動量用のリミット値MoveLimit_vを超えているか否かを判定し、垂直方向の中心移動量Move_vの絶対値が垂直方向の拡大中心移動量用のリミット値MoveLimit_vを超えていると判定した場合、ステップＳ１３８に進み、拡大中心移動量用のリミット値MoveLimit_vを垂直方向の中心移動量Move_vに設定する。
【０１５５】
すなわち、垂直方向の中心移動量Move_vの絶対値が垂直方向の拡大中心移動量用のリミット値MoveLimit_vを超えている場合には、中心移動量Move_vがリミット値MoveLimit_vに押え込まれる。例えば、ユーザが、回転ダイヤル４４を所定の回転方向に回転し続けた場合にも、ステップＳ１３７およびＳ１３８の処理によって、中心移動量Move_vの絶対値がリミット値MoveLimit_vより大きくなることはない。この処理により、ユーザによって回転ダイヤル４４が必要以上に回転されたとしても、拡大により発生する垂直方向の余剰領域を超えてしまう事ことを避けることができる。
【０１５６】
ステップＳ１３７において、垂直方向の中心移動量Move_vの絶対値が垂直方向の拡大中心移動量用のリミット値MoveLimit_vを超えていないと判定された場合、ステップＳ１３８の処理がスキップされ、処理は、ステップＳ１３９に進む。
【０１５７】
ステップＳ１３９において、カメラ制御マイコン４は、初期値Vstart０に垂直方向の中心移動量Move_vを加算し、垂直方向の拡大領域開始点Vstartを算出する。すなわち、図２０に示されるように、初期値Vstart０に中心移動量Move_vが加算されることによって、中心移動量を考慮した拡大領域開始点Vstartが算出される。
【０１５８】
ここで、初期値Vstart０は、ステップＳ１３１の処理でVremに設定されており、上述したように、Vremは１／β画素単位で算出されているので、ステップＳ１４０において、カメラ制御マイコン４は、算出された垂直方向の拡大領域開始点Vstartを整数画素部分INT[Vstart]と小数画素部分Dec[Vstart]に切り分ける。そして、切り分けられた整数画素部分INT[Vstart]は、VstartINTに設定され、小数画素部分Dec[Vstart]は、VstartDecに設定される。
【０１５９】
ステップＳ１４１において、カメラ制御マイコン４は、フィールド毎に、整数画素部分VstartINT、および小数画素部分VstartDecを調整して、各フィールド時の出力同士がインターレース補間できるように補正するといったインターレース処理を行う。
【０１６０】
ステップＳ１４２において、カメラ制御マイコン４は、拡大領域開始点（整数画素部分）VstartINTに拡大すべき領域のサイズVIPを加算し、拡大演算停止点VstopINTを算出する。
【０１６１】
以上のステップＳ１３１乃至Ｓ１４２の処理により、垂直方向の最終的な拡大領域が決定され、最終的な各種パラメータが算出される。
【０１６２】
続いて、水平方向の最終的な拡大領域を決定するための処理が行われる。ステップＳ１４３において、カメラ制御マイコン４は、水平方向の初期値をHstart０＝Hremに設定する。ステップＳ１４４において、カメラ制御マイコン４は、回転ダイヤル４４の１パルスあたりの水平方向の移動量ΔMove_hを算出する。
【０１６３】
ここで、水平方向の移動量ΔMove_hとは、図１９に示したように、水平方向の拡大領域HIPをＮ分割したサイズを、１パルスあたりの移動量として返すような値である。このように、１パルスあたりの移動量を、拡大領域HIPをＮ分割した値（すなわち、ΔMove_h＝HIP／Ｎ）に常に設定しておくことにより、倍率に関係なく出力画像に対する移動量比率を一定に保つことが可能になる。
【０１６４】
ステップＳ１４５において、カメラ制御マイコン４は、ユーザインターフェースマイコン５より取得した回転ダイヤル４４の移動量情報に基づいて、ユーザにより、画面左側への移動が指示されたか否か、すなわち、フラグLEFT＝１であるか否かを判定し、画面左側への移動が指示されたと判定した場合、ステップＳ１４６に進み、水平方向の中心移動量Move_hから水平移動量ΔMove_hを減算する。
【０１６５】
ステップＳ１４５において、ユーザにより、画面左側への移動が指示されていないと判定された場合、すなわち、フラグLEFT＝０であると判定された場合、ステップＳ１４６の処理がスキップされ、処理は、ステップＳ１４７に進む。
【０１６６】
ステップＳ１４７において、カメラ制御マイコン４は、ユーザインターフェースマイコン５より取得した回転ダイヤル４４の移動量情報に基づいて、ユーザにより、画面右側への移動が指示されたか否か、すなわち、フラグRIGHT＝１であるか否かを判定し、画面右側への移動が指示されたと判定した場合、ステップＳ１４８に進み、水平方向の中心移動量Move_hに水平移動量ΔMove_hを加算する。
【０１６７】
ステップＳ１４７において、ユーザにより、画面右側への移動が指示されていないと判定された場合、すなわち、フラグRIGHT＝０であると判定された場合、ステップＳ１４８の処理がスキップされ、処理は、ステップＳ１４９に進む。
【０１６８】
ステップＳ１４９において、カメラ制御マイコン４は、算出された水平方向の中心移動量Move_hの絶対値が水平方向の拡大中心移動量用のリミット値MoveLimit_hを超えているか否かを判定し、水平方向の中心移動量Move_hの絶対値が水平方向の拡大中心移動量用のリミット値MoveLimit_hを超えていると判定した場合、ステップＳ１５０に進み、拡大中心移動量用のリミット値MoveLimit_hを水平方向の中心移動量Move_hに設定する。
【０１６９】
すなわち、水平方向の中心移動量Move_hの絶対値が水平方向の拡大中心移動量用のリミット値MoveLimit_hを超えている場合には、中心移動量Move_hがリミット値MoveLimit_hに押え込まれる。例えば、ユーザが、回転ダイヤル４４を所定の回転方向に回転し続けた場合にも、ステップＳ１４９およびＳ１５０の処理によって、中心移動量Move_hの絶対値がリミット値MoveLimit_hより大きくなることはない。この処理により、ユーザによって回転ダイヤル４４が必要以上に回転されたとしても、拡大により発生する水平方向の余剰領域を超えてしまう事ことを避けることができる。
【０１７０】
ステップＳ１４９において、水平方向の中心移動量Move_hの絶対値が水平方向の拡大中心移動量用のリミット値MoveLimit_hを超えていないと判定された場合、ステップＳ１５０の処理がスキップされ、処理は、ステップＳ１５１に進む。
【０１７１】
ステップＳ１５１において、カメラ制御マイコン４は、初期値Hstart０に水平方向の中心移動量Move_hを加算し、水平方向の拡大領域開始点Hstartを算出する。すなわち、図２０に示されるように、初期値Hstart０に中心移動量Move_hが加算されることによって、中心移動量を考慮した拡大領域開始点Hstartが算出される。
【０１７２】
ここで、初期値Hstart０は、ステップＳ１４３の処理でHremに設定されており、上述したように、Hremは１／β画素単位で算出されているので、ステップＳ１５２において、カメラ制御マイコン４は、算出された水平方向の拡大領域開始点Hstartを整数画素部分INT[Hstart]と小数画素部分Dec[Hstart]に切り分ける。そして、切り分けられた整数画素部分INT[Hstart]は、HstartINTに設定され、小数画素部分Dec[Hstart]は、HstartDecに設定される。
【０１７３】
ステップＳ１５３において、カメラ制御マイコン４は、拡大領域開始点（整数画素部分）HstartINTに拡大すべき領域のサイズHIPを加算し、拡大演算停止点HstopINTを算出する。
【０１７４】
以上のステップＳ１４３乃至Ｓ１５３の処理により、水平方向の最終的な拡大領域が決定され、最終的な各種パラメータが算出される。
【０１７５】
図１２のステップＳ８４に戻り、カメラ制御マイコン４は、算出された最終的な各種パラメータを、対象となるカメラ信号処理IC３に適する形式に加工し、通信バッファに設定した後、処理は終了される。
【０１７６】
以上のように、NTSCフォーマットもしくはPALフォーマットのいずれの外部入力信号に対しても、本発明を適用することにより、容易に電子ズームを行うことが可能になる。
【０１７７】
また、電子ズームの際にクロックレートコンバートを行うようにしたので、回路規模を大きくすることなく、高性能に入力画像の電子ズームを実現することが可能になる。
【０１７８】
また、以上においては、電子ズームを用いる場合を例として説明したが、本発明はこれに限らず、例えば、他のカメラ系エフェクト信号処理などに適用することも可能である。
【０１７９】
さらにまた、将来、HD（High Definition）フォーマットで記録されたテープを再生し、再生ズームを行い、NTSCフォーマットもしくはPALフォーマットで鑑賞する場合、HDフォーマットは、NTSCフォーマットもしくはPALフォーマットに対してオーバサンプリングなデータとなる。従って、ズーム動作も縮小側、等倍、および拡大側の３種類のズームエリアが発生し、縮小もしくは等倍領域でのズーム動作では、画像劣化のないズームが可能になる。
【０１８０】
上述した一連の処理は、ソフトウェアにより実行することもできる。そのソフトウェアは、そのソフトウェアを構成するプログラムが、専用のハードウェアに組み込まれているコンピュータ、または、各種のプログラムをインストールすることで、各種の機能を実行することが可能な、例えば汎用のパーソナルコンピュータなどに、記録媒体からインストールされる。
【０１８１】
この記録媒体は、コンピュータとは別に、ユーザにプログラムを提供するために配布される、プログラムが記録されている磁気ディスク３１（フロッピーディスクを含む）、光ディスク３２（CD-ROM（Compact Disk-Read Only Memory），DVD（Digital Versatile Disk）を含む）、光磁気ディスク３３（MD(Mini-Disk)を含む）、もしくは半導体メモリ３４などよりなるパッケージメディアなどにより構成される。
【０１８２】
なお、本明細書において、記録媒体に記録されるプログラムを記述するステップは、記載された順序に沿って時系列的に行われる処理はもちろん、必ずしも時系列的に処理されなくとも、並列的あるいは個別に実行される処理をも含むものである。
【０１８３】
【発明の効果】
本発明によれば、回路規模を大きくすることなく、高性能に入力画像の電子ズームを行うことができる。
【図面の簡単な説明】
【図１】本発明を適用したビデオカメラの内部の構成例を示すブロック図である。
【図２】図１のカメラ制御マイコンおよびヒューマンインターフェース、並びに、その周辺の機器の詳細な構成例を示すブロック図である。
【図３】再生ズーム処理を説明するためのフローチャートである。
【図４】カメラ制御マイコン処理を説明するためのフローチャートである。
【図５】図４に続くフローチャートである。
【図６】タイマ割込みを説明するための図である。
【図７】 NTSCフォーマットのVD入力信号のタイマ割込みを説明するための図である。
【図８】他の例のNTSCフォーマットのVD入力信号のタイマ割込みを説明するための図である。
【図９】 PALフォーマットのVD入力信号のタイマ割込みを説明するための図である。
【図１０】他の例のPALフォーマットのVD入力信号のタイマ割込みを説明するための図である。
【図１１】自走状態のタイマ割込みを説明するための図である。
【図１２】再生ズーム制御処理を説明するためのフローチャートである。
【図１３】図１２のステップＳ７９の再生ズームポジション制御処理を詳しく説明するためのフローチャートである。
【図１４】変数PBZOOM_POSITIONと再生ズーム倍率の関係を示す図である。
【図１５】図１２のステップＳ８１の拡大領域を決定する各種パラメータの算出処理を詳しく説明するためのフローチャートである。
【図１６】外部入力信号から拡大領域が決定される様子を説明するための図である。
【図１７】図１２のステップＳ８２およびＳ８３の拡大中心移動量および最終的な各種パラメータの算出処理を詳しく説明するためのフローチャートである。
【図１８】図１７に続くフローチャートである。
【図１９】移動量算出処理を説明するための図である。
【図２０】最終的な拡大領域が決定される様子を説明するための図である。
【符号の説明】
１ イメージャ， ２ フロントエンド部， ３ カメラ信号処理IC， ４カメラ制御マイコン， ５ ヒューマンインターフェースマイコン， ６ ドライブ， ３１ 光ディスク， ３２ 光磁気ディスク， ３３ ， ３４ 半導体メモリ， １１ カメラ信号処理部， １３ 画素変換処理部， １４ 大容量RAM， １６ 外部ICインターフェース， １７ クロックレートコンバータ，１９ マイコンインターフェース， ２０ 同期信号生成部， ４１ CAM/VTRモード切替スイッチ， ４２ 再生ズームモード切替スイッチ， ４３ ズームキー， ４４ 回転ダイヤル， ４５ 表示部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image recording / reproducing apparatus and method, a recording medium, and a program, and more particularly, for example, an image recording / reproducing apparatus capable of performing electronic zoom of an input image with high performance without increasing the circuit scale. And a method, a recording medium, and a program.
[0002]
[Prior art]
Some video cameras using a conventional imager are equipped with a function of performing zooming by digital signal processing after digitizing an output signal from the imager in addition to optical zoom.
[0003]
Usually, such an IC (Integrated Circuit) that performs so-called camera signal processing receives output data from an imager, performs predetermined camera signal processing, and performs electronic zoom processing in a pixel conversion unit as necessary, Output data to the IC. For this reason, the pixel conversion unit is a processing unit for handling camera signals, and is not configured to also serve as a pixel conversion unit in the camera signal processing IC for external input data.
[0004]
Therefore, there are video cameras that have a function for zooming and playing back signals such as tape playback, but the pixel conversion performed in these playback zooms is also used as the pixel conversion unit for electronic zoom of the camera signal processing IC described above. It is not done by other ICs or other processing units.
[0005]
The pixel conversion unit for electronic zoom in the camera signal processing IC is a processing unit for realizing electronic zoom for the output signal from the imager, and various filters are used to improve the performance of the electronic zoom.
[0006]
However, in conventional cameras, playback zoom processing for source signals other than the output signal from the imager (for example, VTR (Video Tape Recorder) signal, DV (Digital Video) input signal, line input signal, etc.) Is performed by a processing unit different from the pixel conversion unit that realizes the electronic zoom.
[0007]
This is because the camera signal processing IC targets the electronic zoom processing of the imager output signal, and includes the pixel conversion unit for electronic zoom of the camera signal processing IC. As a result, as described above, other than the output signal from the imager The reproduction zoom process for the source signal is performed by a processing unit different from the pixel conversion unit for realizing the electronic zoom for the imager output signal.
[0008]
[Problems to be solved by the invention]
In other words, for a signal having a different clock rate and data format such as an imager output signal or an external input signal, a circuit scale is provided in the case where a plurality of electronic zoom processing units are provided or the electronic zoom processing unit cannot be used completely. There was a problem that increased.
[0009]
In addition, there is a problem that control of the electronic zoom operation becomes complicated due to a difference in performance of the electronic zoom operation between the electronic zoom processing of the imager output signal and the electronic zoom processing of the source signal.
[0010]
As described above, in the conventional video camera, the camera signal processing unit that handles the imager output signal and the pixel conversion unit for electronic zoom of the camera signal IC are not combined with the external input signal that is handled by the external IC. Further, a clock change processing unit and an external IC interface are not provided in front of the pixel conversion unit for electronic zoom of the camera signal IC so as to absorb a clock or a format with different external input.
[0011]
The present invention has been made in view of such a situation, and makes it possible to perform electronic zoom with high performance without increasing the circuit scale.
[0012]
[Means for Solving the Problems]
  The image recording / reproducing apparatus of the present invention comprises:An image recording / reproducing apparatus including a signal processing unit that performs signal processing on an input image signal and a control unit that controls the signal processing unit, wherein the signal processing unit includes: an image signal obtained by imaging; and For each image signal input from the outside, a synchronization signal generating means for generating an output synchronization signal used for outputting the image signal and outputting it to the control unit, an image signal obtained by imaging, and an input from the outside A pixel conversion unit that converts a predetermined area on the image corresponding to the image signal into a predetermined size for each of the image signals, and the control unit outputs the synchronization signal for output output from the synchronization signal generation unit Generating means for generating a communication synchronization signal used for controlling the signal processing unit in synchronization with the output synchronization signal based on the generated down edge, and based on the generated communication synchronization signal. Controls the signal processing unit haveControl means andIs an image recording / reproducing apparatus.
[0013]
The control unitTheZoom corresponding to operation byAcquisition means for acquiring informationWhen,TakeObtainedzoomBased on informationTo convert a given area to a given sizeCalculate magnificationAnd a calculation unit, and the control unit causes the pixel conversion unit in the signal processing unit to convert the predetermined area into a size corresponding to the magnification.be able to.
[0014]
The signal processor is input from the outsideData format conversion means for converting the image signal into a predetermined data format, and the image signal converted by the data format conversion means, Signal processorA clock transfer means for transferring to the clock ofCan be providedThe pixel conversion means includesSignal processorImage signal transferred to the clock ofThe predetermined area on the image corresponding to is converted to the predetermined sizebe able to.
[0015]
A synchronization signal for outputting an image signal input from the outside can be a synchronization signal of either NTSC (National Television System Committee) format or PAL (Phase Alternation Line) format.
[0016]
  The image recording / reproducing method of the present invention comprises:An image recording / reproducing method of an image recording / reproducing apparatus including a signal processing unit that performs signal processing on an input image signal and a control unit that controls the signal processing unit, the image recording / reproducing method obtained by imaging in the signal processing unit. For each of the received image signal and the image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting it to the control unit, and an image signal obtained by imaging For each of the image signals input from the outside, the pixel conversion step for converting a predetermined region on the image corresponding to the image signal into a predetermined size and the processing of the synchronization signal generation step in the control unit are output. Based on the down edge generated in the output synchronization signal, a communication synchronization signal used to control the signal processing unit is generated in synchronization with the output synchronization signal. A generation step of, controlling the signal processing unit based on the generated communication synchronization signalIncluding control stepsThis is an image recording / reproducing method.
[0017]
  The program recorded on the recording medium of the present invention is:An image signal obtained by imaging in the signal processing unit in a computer of an image recording / reproducing apparatus including a signal processing unit that performs signal processing on an input image signal and a control unit that controls the signal processing unit, and For each image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting it to the control unit, an image signal obtained by imaging, and an input from the outside A pixel conversion step for converting a predetermined region on the image corresponding to the image signal into a predetermined size for each of the image signals, and an output synchronization signal output by the processing of the synchronization signal generation step in the control unit Generates a communication synchronization signal used to control the signal processor in synchronization with the output synchronization signal based on the down edge And step to control the signal processing unit based on the generated communication synchronization signalIncluding control stepsIt is a program that executes processing.
[0018]
  The program of the present inventionAn image signal obtained by imaging in the signal processing unit in a computer of an image recording / reproducing apparatus including a signal processing unit that performs signal processing on an input image signal and a control unit that controls the signal processing unit, and For each image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting it to the control unit, an image signal obtained by imaging, and an input from the outside A pixel conversion step for converting a predetermined region on the image corresponding to the image signal into a predetermined size for each of the image signals, and an output synchronization signal output by the processing of the synchronization signal generation step in the control unit Output synchronization based on down-edgessignalInSyncGenerating a communication synchronization signal used for controlling the signal processing unit, and controlling the signal processing unit based on the generated communication synchronization signalControl step andIncluding processingExecuteIt is a program.
[0019]
  In the image recording / reproducing apparatus and method, and the program of the present invention,In the signal processing unit, for each of the image signal obtained by imaging and the image signal input from the outside, an output synchronization signal used for outputting the image signal is generated and output to the control unit, and obtained by imaging. For each of the received image signal and the image signal input from the outside, a predetermined area on the image corresponding to the image signal is converted into a predetermined size. Further, the control unit generates a communication synchronization signal used to control the signal processing unit in synchronization with the output synchronization signal, based on the down edge generated in the output synchronization signal output from the signal processing unit. The signal processing unit is controlled based on the generated communication synchronization signal.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
FIG. 1 is a block diagram showing an internal configuration example of a video camera to which the present invention is applied.
[0022]
The imager 1 is configured by an image sensor such as a CCD (Charge-Coupled DevICe), for example, and reads the captured image data. The front end unit 2 includes, for example, a CDS (Correlated Double Sampling), an AGC (AutomatIC Gain Control), and an AD (Analog to Digital) converter, and removes noise from the image data read by the imager 1. After performing predetermined signal processing such as automatic gain control and A / D conversion, the digital signal is supplied to the camera signal processing IC 3.
[0023]
The camera signal processing IC 3 includes a camera signal processing unit 11, a pixel conversion processing unit 13, a large capacity RAM (Random Access Memory) 14, an external IC interface 16, a clock rate converter 17, a microcomputer interface 19, and a synchronization signal generation unit 20. Is done.
[0024]
The camera signal processing unit 11 performs predetermined camera signal processing on the digital signal (camera input data) input from the front end unit 2 to generate a luminance (Y) signal and a color difference (Cr / Cb) signal. Then, the data is supplied to the pixel conversion processing unit 13 via the camera data bus 12.
[0025]
The external IC interface 16 performs interface processing for supplying an external signal input from the outside via the external signal data bus 15 to the clock rate converter 17.
[0026]
That is, the signal input from the outside is, for example, a VTR signal, a line input signal, or a DV input signal. The clock of these signals is 13.5 MHz, and the data bus width is a data format in which the luminance signal is 8 bits and the chroma signal is 4 bits. On the other hand, the clock of the camera signal processing IC 3 is 54 MHz, and the data bus width is 8 bits for the luminance signal and 8 bits for the chroma signal. Therefore, the external IC interface 16 converts the data bit width and data arrangement of the external input signal and outputs the converted data to the clock rate converter 17.
[0027]
The clock rate converter 17 converts an external input signal having a clock rate of 13.5 MHz input from the external IC interface 16 to a data bus clock rate conversion process (clock transfer process) to 54 MHz which is the clock rate of the camera signal processing IC 3. ) And the external signal with the converted clock rate is supplied to the pixel conversion processing unit 13 via the external signal data bus 18.
[0028]
The pixel conversion processing unit 13 is a luminance (Y) signal and a color difference (Cr / Cb) signal input from the camera signal processing unit 11 via the camera data bus 12 based on the control of the camera control microcomputer 4 or externally. NTSC (National Television System Committee) format or PAL (Phase Alternation Line) format is obtained by reducing, scaling, or enlarging the external signal input from the clock rate converter 17 via the signal data bus 18. It is converted to a format with high affinity and output to the subsequent IC as an output signal of the camera signal processing IC3.
[0029]
In this manner, the pixel conversion processing unit 13 receives either camera signal processing data or external IC data based on the control of the camera control microcomputer 4 and performs pixel conversion processing on the received data. It is possible to select whether or not to perform. Thereby, the pixel conversion processing unit 13 can perform data processing without being aware of the distinction between the camera signal and the external signal.
[0030]
When the image data is reduced and converted, the pixel conversion processing unit 13 buffers the large-capacity RAM 14 after reducing and converting the image data, and does not perform pixel conversion of the data at the next reading, so that the external IC Supply to interface 16. The pixel conversion processing unit 13 also buffers the image data in the large-capacity RAM 14 without performing the pixel conversion when the image data is enlarged and performs the enlargement conversion on the next reading. To the external IC interface 16. The pixel conversion processing unit 13 further buffers the image data in the large capacity RAM 14 even when pixel conversion is not performed.
[0031]
The external IC interface 16 performs an interface process for outputting the NTSC format or PAL format digital signal input from the pixel conversion processing unit 13 to the external IC.
[0032]
The synchronization signal generation unit 20 generates an internal timing signal and a synchronization signal for output data to the external IC, outputs the output synchronization signal to the external IC, and outputs an output synchronization signal for camera input data or external signal data. An output synchronization signal is output to the camera control microcomputer 4. That is, a data field signal (FLD signal), vertical synchronizing signal (VD signal), and horizontal synchronizing signal (HD signal) are generated and output to the camera control microcomputer 4.
[0033]
Hereinafter, the VD signal of the output synchronization signal for external signal data output from the synchronization signal generation unit 20 to the camera control microcomputer 4 is referred to as an external VD signal, and the FLD signal is referred to as an external FLD signal.
[0034]
The camera control microcomputer 4 controls each part of the camera signal processing IC 3 based on a control signal supplied from the human interface microcomputer 5, for example, a zoom amount, a trimming movement amount, or a zoom function on / off control signal. The camera control microcomputer 4 performs camera signal processing synchronized with the external signal data based on the external signal data output synchronization signal (that is, the external VD signal and the external FLD signal) supplied from the synchronization signal generator 20. IC3 can be controlled.
[0035]
Here, in order to continuously control the camera signal processing IC 3, the camera control microcomputer 4 needs to perform control in synchronization with the external VD signal and the external FLD signal. That is, the camera signal processing IC 3 detects the down edge of the communication synchronization signal from the camera control microcomputer 4 and reflects the set value set by the camera control microcomputer 4 at the detected timing. Therefore, the camera control microcomputer 4 uses the down edge of the external VD signal to generate a communication synchronization signal (hereinafter referred to as a SOFT_VD signal) that determines the timing for reflecting the setting value of the camera signal processing IC 3. The camera control microcomputer 4 detects the down edge of the input signal and executes an interrupt process. This interrupt process is used to generate the SOFT_VD signal.
[0036]
The camera control microcomputer 4 can also control the camera signal processing IC 3 synchronized with the camera input data based on the camera input data output synchronization signal supplied from the synchronization signal generation unit 20.
[0037]
The microcomputer interface 19 manages the interface with the camera signal processing IC 3 based on the microcomputer communication data supplied from the camera control microcomputer 4. The microcomputer interface 19 reflects the setting value set by the camera control microcomputer 4 based on the down edge of the SOFT_VD signal supplied from the camera control microcomputer 4.
[0038]
The human interface microcomputer 5 receives an operation input from the user and manages an interface between the user and the camera signal processing IC 3.
[0039]
A drive 6 is connected to the camera control microcomputer 4 as necessary, and a magnetic disk 31, an optical disk 32, a magneto-optical disk 33, or a semiconductor memory 34 is appropriately mounted, and data or programs recorded therein are read out. And supplied to the camera control microcomputer 4.
[0040]
FIG. 2 is a block diagram showing a detailed configuration example of the camera control microcomputer 4 and the human interface 5 shown in FIG. 1 and peripheral devices.
[0041]
The human interface microcomputer 5 detects the state when the CAM / VTR mode switch 41 is operated by the user, and detects the CAM / VTR mode information (whether the current mode is the camera mode or the VTR mode). Information indicating whether or not there is) is supplied to the camera control microcomputer 4.
[0042]
The human interface microcomputer 5 detects the state when the playback zoom mode changeover switch 42 is operated by the user, and displays playback zoom mode information (whether playback zoom is on or playback zoom is off). Information) is supplied to the camera control microcomputer 4.
[0043]
The human interface microcomputer 5 detects the state when the zoom key 43 is operated by the user, and displays zoom information (information indicating whether the zoom key 43 is pressed to the tele side or the wide side and the zoom amount). The camera control microcomputer 4 is notified.
[0044]
The human interface microcomputer 5 detects the state when the rotary dial 44 is operated by the user, and supplies movement amount information (information indicating the rotation direction) to the camera control microcomputer 4.
[0045]
Based on the information supplied from the human interface microcomputer 5, the camera control microcomputer 4 calculates magnification information for each field and supplies the calculation result to the human interface microcomputer 5, as will be described later with reference to FIG.
[0046]
The human interface microcomputer 5 outputs and displays the current magnification on the display unit 45 based on the magnification information supplied from the camera control microcomputer 4.
[0047]
Next, the reproduction zoom process of the external input signal executed by the camera signal processing IC 3 will be described with reference to the flowchart of FIG.
[0048]
In step S1, the external IC interface 16 of the camera signal processing IC 3 determines whether or not the VTR signal is input from the external IC via the external signal data bus 15, and the determination processing is performed until the VTR signal is input from the external IC. repeat.
[0049]
If it is determined in step S1 that the VTR signal has been input from the external IC, the process proceeds to step S2, and the external IC interface 16 receives the data of the input VTR signal having a luminance signal of 8 bits and a chroma signal of 4 bits. Converts the bus width (that is, the signal format conforming to CCIR (Comite Consultatif International Radiophonique) Rec601) to a bus width of 8 bits for luminance signals and 8 bits for chroma signals, and data that is specified in the camera signal processing IC 3 Sort into format.
[0050]
In step S3, the clock rate converter 17 performs a clock transfer process on the data bus of the VTR signal in which the data bit width and the data are rearranged in the process of step S2 to a clock rate of 13.5 MHz to 54 MHz. .
[0051]
In step S <b> 4, the pixel conversion processing unit 13 cuts out a desired area of the VTR signal that has undergone the clock change process in the process of step S <b> 3 based on the control of the camera control microcomputer 4 and buffers it in the large-capacity RAM 14. To do.
[0052]
In step S5, the pixel conversion processing unit 13 reads the VTR signal buffered in the large-capacity RAM 14 in the process of step S4 in the next field. For example, data buffered in the large-capacity RAM 14 in the odd field is read out in the next even field.
[0053]
In step S6, the pixel conversion processing unit 13 applies a predetermined screen size (for example, a screen size of 720 pixels × 480 lines) to the data read from the large-capacity RAM 14 in the process of step S5 as necessary. To a data format that conforms to. In this way, the read data is subjected to the pixel conversion processing unit 13 for the expansion pixel conversion to the screen size conforming to the NTSC format or the PAL format.
[0054]
In step S7, the external IC interface 16 outputs the data converted into the predetermined data format to a subsequent external IC (for example, a video signal processing IC). In addition, the synchronization signal generation unit 20 generates a synchronization signal (FLD signal, VD signal, and HD signal) of the output signal at a timing when data is output from the external IC interface 16, and outputs the synchronization signal to the subsequent IC.
[0055]
As described above, the reproduction zoom process can be easily performed on the VTR signal (that is, the external input signal) from the external input IC.
[0056]
Further, not only the above-described VTR signal but also a reproduction zoom process can be performed on a line input signal and a DV input signal.
[0057]
Next, the basic operation of the human interface microcomputer 5 shown in FIG. 2 will be described.
[0058]
The human interface microcomputer 5 detects the state of the CAM / VTR mode changeover switch 41, sets the flag VTR_ON to 0 when the current mode is the camera mode, and sets the flag VTR_ON to 1 when the mode is the VTR mode. Set. The human interface microcomputer 5 also detects the state of the playback zoom key 42, sets the flag PBZOOM_ON to 1 when the current mode is the playback mode, and sets the flag PBZOOM_ON to 0 when the current mode is the non-playback mode. .
[0059]
The human interface microcomputer 5 detects the state of the zoom key 43 and sets the flag TkeyON and the flag WkeyON to appropriate values. For example, when the telephoto (telephoto) side is pressed, the flag TkeyON is set to 1, and the flag WkeyON is set to 0. When the telephoto (telephoto) side is pressed, the flag TkeyON is set to 0. When the flag WkeyON is set to 1 and neither the telephoto side nor the wide area side is pressed, both the flag TkeyON and the flag WkeyON are set to 0.
[0060]
In addition, the zoom key 43 is configured to detect several levels of pressing amount, and the human interface microcomputer 5 sets a value corresponding to the pressing amount of the zoom key 43 in RAM (Zspeed). For example, the variable Zspeed is set to 1 when the zoom key 43 is pressed lightest, and the variable Zspeed is set to 2 when pressed a little harder.
[0061]
Note that the increment amount ΔPBZP corresponding to the variable Zspeed is registered in the ROM table in advance.
[0062]
Further, the human interface microcomputer 5 detects the state of the rotary dial 44, sets the flag UP, the flag DOWM, the flag RIGHT, or the flag LEFT to 1 based on the rotation direction. Set the flag to 0.
[0063]
Then, the human interface microcomputer 5 supplies the set CAM / VTR mode information, reproduction zoom mode information, zoom information, and movement amount information to the camera control microcomputer 4.
[0064]
Based on the flag set by the human interface microcomputer 5 for each field, the camera control microcomputer 4 performs a reproduction zoom control process, which will be described later with reference to FIG. 12, and controls the pixel conversion processing unit 13 as well as the current magnification information. Is supplied to the human interface microcomputer 5 for each field. The human interface microcomputer 5 outputs and displays the current magnification on the display unit 45 based on the magnification information supplied from the camera control microcomputer 4.
[0065]
Next, camera control microcomputer processing for controlling the camera signal processing IC 3 in synchronization with the input signal will be described with reference to the flowcharts of FIGS. 4 and 5.
In this processing, a built-in timer of the camera control microcomputer 4 and a SOFT_VD signal generation algorithm using a function for generating an interrupt process by detecting a down edge of an input signal will be described.
[0066]
The built-in timer of the camera control microcomputer 4 can set the timing for generating a timer interrupt next. Using this timer interrupt generation function, setting of interrupt permitting or interrupt prohibition for the down edge of the external VD signal is performed at a timing after a predetermined time set in the processing of steps S22, S27, S30, and S39 described later. . The timer setting time is such that the VD signal interrupt disable range <NTSC signal cycle <PAL signal cycle <VD signal interrupt enable range so that the down edge of the VD signal in the NTSC format and PAL format occurs in the VD signal interrupt enable range. The time is set so that the magnitude relationship is established.
[0067]
Here, the NTSC signal cycle is 16.666 ms as shown in FIG. 6A, and the PAL signal cycle is 20.000 ms as shown in FIG. 6B. At time t1, a down edge of the NTSC format and PAL format VD signal is generated, at time t4, a down edge of the NTSC format VD signal is generated, and at time t6, the down edge of the PAL format VD signal is detected. It will be described below as being generated.
[0068]
When the operation of the camera control microcomputer 4 is started, the state of the VD input signal in the NTSC format is changed at time t1 as shown in FIG. 7A or FIG. The state of the input signal is changed at time t1 as shown in FIG. 9A or 10A, and when there is no input signal, the state at time t1 as shown in FIG. 11A. Transition to.
[0069]
In step S21, the camera control microcomputer 4 sets the camera control microcomputer output port to SOFT_VD = 0 (Low) in order to generate the down edge of the SOFT_VD signal. In step S22, as shown in FIG. 6C, the camera control microcomputer 4 sets the first camera control microcomputer built-in timer in order to set the time for the SOFT_VD signal down edge generation and the VD signal interrupt prohibition range. . As a result, the built-in timer is set so that a timer interrupt occurs at time t2.
[0070]
In step S23, as shown in FIG. 6C, when the camera control microcomputer 4 starts the camera control microcomputer processing from time t1, in step S24, the camera control microcomputer 4 sets the interrupt prohibition of the VD signal input port. In step S25, the camera control microcomputer 4 determines whether or not the first timer interrupt has occurred, that is, whether or not the time t2 has been reached, and repeats the determination process until the first timer interrupt occurs.
[0071]
For example, in the case of an NTSC format VD input signal, in the example of FIG. 7A, it is determined whether or not the time t2, time t5, time t8, or time t11 has been reached, and the example of FIG. In step S2, it is determined whether time t2, time t6, time t9, or time t12 has been reached. In the case of the PAL format VD input signal, in the example of FIG. 9A, it is determined whether time t2, time t6, or time 10 has been reached, and in the example of FIG. 10A, time t2 It is determined whether or not the time t5 or the time t9 has been reached. Further, when there is no input signal, in the example of FIG. 11A, it is determined whether or not the time t2 or the time t6 has been reached.
[0072]
If it is determined in step S25 that the first timer interruption has occurred, the process proceeds to step S26, and the camera control microcomputer 4 sets the camera control microcomputer output port to SOFT_VD = 1 (High).
[0073]
  That is, in the case of the example in FIG. 7B, the SOFT_VD signal is generated when the time t2, the time t5, the time t8, or the time t11 is reached. In the case of the example in FIG. 8B, the SOFT_VD signal is generated when the time t2, the time t6, the time t9, or the time t12 is reached. In the case of the example in FIG. 9A, time t2, time t6, or timetWhen 10 is reached, a SOFT_VD signal is generated. In the case of the example in FIG. 10A, the SOFT_VD signal is generated when time t2, time t5, or time t9 is reached. In the case of the example in FIG. 11A, the SOFT_VD signal is generated when the time t2 or the time t6 is reached.
[0074]
In step S27, as shown in FIG. 6C, the camera control microcomputer 4 sets a second camera control microcomputer built-in timer in order to set the time of the VD signal interrupt prohibition range. As a result, the built-in timer is set so that a timer interrupt occurs at time t3.
[0075]
In step S28, the camera control microcomputer 4 sets the VD signal input port interrupt prohibition. In step S29, the camera control microcomputer 4 determines whether or not the second timer interrupt has occurred, that is, whether or not the time t3 has been reached, and repeats the determination process until the second timer interrupt occurs.
[0076]
For example, in the case of an NTSC format VD input signal, in the example of FIG. 7A, it is determined whether time t3, time t6, or time t9 has been reached, and in the example of FIG. It is determined whether time t3, time t7, or time t10 has been reached. In the case of the PAL format VD input signal, in the example of FIG. 9A, it is determined whether the time t3 or the time t7 has been reached. In the example of FIG. 10A, at the time t3 or the time t6. It is determined whether or not it has been reached. Furthermore, when there is no input signal, in the example of FIG. 11A, it is determined whether or not the time t3 has been reached.
[0077]
If it is determined in step S29 that the second timer interrupt has occurred, the process proceeds to step S30, where the camera control microcomputer 4 sets the NTD format VD signal interrupt permission range time as shown in FIG. To do this, set the third camera control microcomputer built-in timer. Thereby, the built-in timer is set so that a timer interrupt occurs at time t5.
[0078]
In step S31, the camera control microcomputer 4 sets interrupt permission for the VD signal input port. In step S32, the camera control microcomputer 4 determines whether or not an interrupt due to the down edge of the NTSC format VD signal has occurred, that is, as shown in FIG. 6A, the down edge of the NTSC format VD signal at time t4. When it is determined that an interruption due to the down edge of the NTSC format VD signal has occurred, the process proceeds to step S33, and the camera control microcomputer 4 determines that the NTSC signal synchronization is confirmed.
[0079]
For example, in the case of an NTSC format VD input signal, in the example of FIG. 7A, it is determined whether time t4, time t7, or time t10 has been reached. In the example of FIG. It is determined whether time t8 or time t11 has been reached. In the case of the PAL format VD input signal, in the example of FIG. 10A, it is determined whether or not the time t4 has been reached.
[0080]
In step S34, the camera control microcomputer 4 sets the NTSC signal synchronization state flag to NTSC_LOCK = 1. In step S35, the PAL signal synchronization state flag is set to PAL_LOCK = 0. In step S36, the free-running state flag is set to FREE_RUN. Set to = 0.
[0081]
In step S37, the camera control microcomputer 4 invalidates the third camera control microcomputer built-in timer set in the process of step S30, returns to step S21, and repeats the above-described process.
[0082]
If it is determined in step S32 that an interruption due to the down edge of the NTSC format VD signal has not occurred, the process proceeds to step S38, and the camera control microcomputer 4 determines whether or not a third timer interruption has occurred, that is, It is determined whether or not the time t5 has been reached, and the determination process is repeated until a third timer interrupt occurs.
[0083]
For example, in the case of an NTSC format VD input signal, it is determined whether or not the time t4 has been reached in the example of FIG. In the case of the PAL format VD input signal, it is determined whether or not the time t4 or the time t8 has been reached in the example of FIG. 9A, and whether or not the time t7 has been reached in the example of FIG. 10A. It is determined whether or not. Further, when there is no input signal, in the example of FIG. 11A, it is determined whether or not the time t4 has been reached.
[0084]
If it is determined in step S38 that the third timer interrupt has occurred, the process proceeds to step S39, where the camera control microcomputer 4 sets the time in the PAL format VD signal interrupt permission range as shown in FIG. To do this, set the 4th camera control microcomputer built-in timer. As a result, the built-in timer is set so that a timer interrupt occurs at time t7.
[0085]
In step S40, the camera control microcomputer 4 sets interrupt permission for the VD signal input port. In step S41, the camera control microcomputer 4 determines whether or not an interrupt due to the down edge of the PAL format VD signal has occurred, that is, as shown in FIG. 6B, the down edge of the PAL format VD signal at time t6. If it is determined whether or not an interruption due to the down edge of the VAL signal in the PAL format has occurred, the process proceeds to step S42, and the camera control microcomputer 4 determines that the PAL signal synchronization is confirmed.
[0086]
For example, in the case of an NTSC format VD input signal, it is determined whether or not the time t5 has been reached in the example of FIG. In the case of the PAL format VD input signal, it is determined whether or not the time t5 or the time t9 has been reached in the example of FIG. 9A, and whether or not the time t8 has been reached in the example of FIG. 10A. It is determined whether or not.
[0087]
In step S43, the camera control microcomputer 4 sets the NTSC signal synchronization state flag to NTSC_LOCK = 0, in step S44, sets the PAL signal synchronization state flag to PAL_LOCK = 1, and in step S45, sets the free-running state flag to FREE_RUN. Set to = 0.
[0088]
In step S46, the camera control microcomputer 4 invalidates the fourth camera control microcomputer built-in timer set in the process of step S39, and then returns to step S21 to repeat the above-described process.
[0089]
If it is determined in step S41 that an interrupt due to the down edge of the VD signal in the PAL format has not occurred, the process proceeds to step S47, where the camera control microcomputer 4 determines whether or not a fourth timer interrupt has occurred. It is determined whether or not the time t7 has been reached, and the determination process is repeated until a fourth timer interrupt occurs.
[0090]
For example, when there is no input signal, in the example of FIG. 11A, it is determined whether or not the time t5 has been reached.
[0091]
If it is determined in step S47 that the fourth timer interruption has occurred, the process proceeds to step S48, and the camera control microcomputer 4 determines that the self-running state is confirmed (that is, there is no input signal).
[0092]
In step S49, the camera control microcomputer 4 sets the NTSC signal synchronization state flag to NTSC_LOCK = 0. In step S50, the PAL signal synchronization state flag is set to PAL_LOCK = 0. In step S51, the free-running state flag is set to FREE_RUN. = 1 is set, the process returns to step S21, and the above-described processing is repeated.
[0093]
As described above, the camera control microcomputer 4 uses the external VD signal and the external FLD signal to determine in what field the broadcast format (that is, NTSC format or PAL format) of the input signal is recorded. Since the SOFT_VD signal is generated after detection, it is possible to support input signals of either NTSC format or PAL format.
[0094]
For example, when the playback system supports both the NTSC format and the PAL format, such as a camcorder, the camera control microcomputer 4 responds to the input signal of any format by applying the present invention. Therefore, continuous control can be performed on input signals of any format.
[0095]
Furthermore, in the above, since the input signal is detected for each field, it is possible to cope with a direct change of the input signal. For example, it is possible to cope with a taped connection between an NTSC format input signal and a PAL format input signal.
[0096]
Next, the reproduction zoom control process executed by the camera control microcomputer 4 will be described with reference to the flowchart of FIG.
[0097]
In step S71, the camera control microcomputer 4 determines from the CAM / VTR mode information supplied from the human interface microcomputer 5 whether the current mode is the VTR mode, that is, whether the VTR flag is VTR_ON = 1. If it is determined that the current mode is not the VTR mode, the process is terminated.
[0098]
If it is determined in step S71 that the current mode is the VTR mode, the process proceeds to step S72, and the camera control microcomputer 4 determines whether the camera signal processing IC 3 is currently synchronized with the external input signal. Then, it is determined whether or not the free-running state flag is FREE_RUN = 1, and if the camera signal processing IC 3 determines that synchronization with the external input signal is not currently performed, the processing ends.
[0099]
For example, when there is no input signal or when the input signal itself is not synchronized, the camera signal processing IC 3 cannot synchronize with the signal. In such a case, since the free-running state flag is set to FREE_RUN = 1 and the free-running state is fixed, the subsequent processing is not performed and the processing ends.
[0100]
If it is determined in step S72 that the camera signal processing IC 3 is currently synchronized with the external input signal, the process proceeds to step S73, where the camera control microcomputer 4 provides the reproduction zoom mode information supplied from the human interface microcomputer 5. From this, it is determined whether or not the current mode is the playback zoom mode, that is, whether or not the playback zoom flag is PBZOOM_ON = 1, and it is determined that the current mode is not the playback zoom mode (the playback zoom flag is If it is determined that PBZOOM_ON = 0), the process proceeds to step S74.
[0101]
In step S74, the camera control microcomputer 4 clears the related RAM, and then in step S75, sets the initial processing flag to PBZOOM_INIT = 1, and the process ends.
[0102]
If it is determined in step S73 that the current mode is the playback zoom mode, the process proceeds to step S76, and the camera control microcomputer 4 determines whether or not the playback zoom mode is switched, that is, the initial processing flag is PBZOOM_INIT =. If it is determined whether or not the playback zoom mode is switched (when it is determined that the initial processing flag is PBZOOM_INIT = 1), the process proceeds to step S77.
[0103]
In step S77, the camera control microcomputer 4 sets an initial value in the variable PBZOOM_POSITION, and after clearing the initial processing flag in step S78 (that is, after setting the initial processing flag to PBZOOM_INIT = 0), the processing is performed. The process proceeds to step S79.
[0104]
Here, the variable PBZOOM_POSITION is a variable directly related to the magnification. When PBZOOM_POSITION = 0, the variable PBZOOM_POSITION becomes the widest (wide) side, and as the variable PBZOOM_POSITION increases, the relationship becomes the telephoto (tele) side There is. Therefore, the initial magnification at the time of switching the playback zoom mode can be arbitrarily determined based on the initial value set here, and by appropriately selecting the initial value, the user has switched to the playback zoom mode. Can be visually recognized.
[0105]
If it is determined in step S76 that the playback zoom mode is not switched, the process proceeds to step S79, and the camera control microcomputer 4 controls the playback zoom position. For example, the value of the variable PBZOOM_POSITION is increased or decreased according to the pressing direction of the zoom key 43 (whether it is pressed to the tele side or the wide side) based on the user's operation, and the amount of pressing the zoom key 43 ( The value of the increase / decrease amount ΔPBZP is controlled depending on whether the button is pressed hard or lightly.
[0106]
Here, the reproduction zoom position control process in step S79 of FIG. 12 will be described in detail with reference to the flowchart of FIG.
[0107]
In step S <b> 101, the camera control microcomputer 4 acquires the current state of the zoom key 43 (that is, zoom information) from the human interface microcomputer 5. As a result, the flag TkeyON indicating whether or not the zoom key 43 is pressed to the tele side, the flag WkeyON indicating whether or not the zoom key 43 is pressed to the wide side, and the variable Zspeed corresponding to the amount of pressing of the zoom key 43 are acquired. Is done.
[0108]
In step S102, the camera control microcomputer 4 sets whether or not the zoom key 43 is pressed to the tele side from the zoom information acquired in step S101, that is, the flag TkeyON = 1 and the flag WkeyON = 0. It is determined whether or not.
[0109]
If it is determined in step S102 that the zoom key 43 has been pressed to the tele side, the process proceeds to step S103, and the camera control microcomputer 4 determines the variable PBZOOM_POSITION from the variable Zspeed that is the zoom information acquired in the process of step S101. Increase amount ΔPBZP_TELE is acquired from the ROM table.
[0110]
In step S104, the camera control microcomputer 4 adds the amount of increase ΔPBZP_TELE acquired in the process of step S103 to the variable PBZOOM_POSITION set one field before. That is, as will be described later, a change in magnification when the telephoto side is pressed (so-called zooming speed when moving toward the telescopic side) is determined by how many ΔPBZP_TELE are set.
[0111]
In step S105, the camera control microcomputer 4 calculates in advance the value of the variable PBZOOM_POSITION in the case of the maximum magnification, and sets this as the maximum value PBZP_MAX of the variable PBZOOM_POSITION. Then, the camera control microcomputer 4 determines whether or not the variable PBZOOM_POSITION obtained in step S104 exceeds the maximum value PBZP_MAX.
[0112]
If it is determined in step S105 that the variable PBZOOM_POSITION exceeds the maximum value PBZP_MAX, the process proceeds to step S106. After the camera control microcomputer 4 sets the maximum value PBZP_MAX to the variable PBZOOM_POSITION, the process proceeds to step S80 in FIG. Return.
[0113]
That is, when the variable PBZOOM_POSITION exceeds the maximum value PBZP_MAX, the variable PBZOOM_POSITION is pressed to the maximum value PBZP_MAX. For example, even when the user keeps pressing the zoom key 43 to the tele side, the variable PBZOOM_POSITION does not become larger than the preset maximum value PBZP_MAX by the processing in steps S105 and S106. With this process, even if the user presses the zoom key 43 more than necessary on the tele side, it is possible to avoid exceeding the preset maximum magnification.
[0114]
If it is determined in step S105 that the variable PBZOOM_POSITION does not exceed the maximum value PBZP_MAX, the subsequent processing is not performed, and the processing returns to step S80 in FIG.
[0115]
If it is determined in step S102 that the zoom key 43 has not been pressed to the tele side, the process proceeds to step S107, and the camera control microcomputer 4 presses the zoom key 43 to the wide side from the zoom information acquired in the process of step S101. Whether the flag TkeyON = 0 and the flag WkeyON = 1 are set.
[0116]
If it is determined in step S107 that the zoom key 43 has been pressed to the wide side, the process proceeds to step S108, and the camera control microcomputer 4 sets the variable PBZOOM_POSITION from the variable Zspeed that is the zoom information acquired in the process of step S101. The amount of decrease ΔPBZP_WIDE is obtained from the ROM table.
[0117]
In step S109, the camera control microcomputer 4 subtracts the decrease amount ΔPBZP_WIDE acquired in the process of step S108 from the variable PBZOOM_POSITION set one field before. That is, as will be described later, a change in magnification when the button is pressed to the wide side (so-called zooming speed toward the wide side) is determined depending on how many ΔPBZP_WIDE are set.
[0118]
In step S110, the camera control microcomputer 4 calculates in advance the value of the variable PBZOOM_POSITION for the minimum magnification, and sets this as the minimum value PBZP_MIN of the variable PBZOOM_POSITION. Then, the camera control microcomputer 4 determines whether or not the variable PBZOOM_POSITION obtained in step S109 is less than the minimum value PBZP_MIN.
[0119]
If it is determined in step S110 that the variable PBZOOM_POSITION is less than the minimum value PBZP_MIN, the process proceeds to step S111. After the camera control microcomputer 4 sets the minimum value PBZP_MIN to the variable PBZOOM_POSITION, the process proceeds to step S80 in FIG. Return.
[0120]
That is, when the variable PBZOOM_POSITION is below the minimum value PBZP_MIN, the variable PBZOOM_POSITION is pressed to the minimum value PBZP_MIN. For example, even when the user keeps pressing the zoom key 43 to the wide side, the variable PBZOOM_POSITION does not become smaller than the preset minimum value PBZP_MIN by the processing in steps S110 and S111. With this process, even if the zoom key 43 is depressed more than necessary on the wide side by the user, it can be avoided that the zoom ratio 43 falls below the preset minimum magnification.
[0121]
If it is determined in step S110 that the variable PBZOOM_POSITION is not less than the minimum value PBZP_MIN, the subsequent processing is not performed, and the processing returns to step S80 in FIG.
[0122]
If it is determined in step S107 that the zoom key 43 has not been pressed to the wide side, that is, if it is determined that the zoom key 43 has not been pressed to either the tele side or the wide side (flag TkeyON = 0, If it is determined that the flag WkeyON = 0 is set), the subsequent processing is not performed, and the processing returns to step S80 in FIG.
[0123]
Returning to FIG. 12, in step S80, the camera control microcomputer 4 uses the variable PBZOOM_POSITION calculated in the process of step S79, and the vertical magnification parameter VMAG and the horizontal magnification parameter HMAG for performing playback zoom control. Is calculated.
[0124]
The magnification parameters VMAG and HMAG calculated here are reflected in the signal processing of the pixel conversion processing unit 13. The pixel conversion processing unit 13 performs an enlargement process or a reduction process in the vertical direction and the horizontal direction, respectively, using the magnification parameters VMAG and HMAG together with other parameters calculated by the process described later with reference to FIG. The relationship between magnification parameters VMAG and HMAG and magnification in this enlargement process or reduction process is expressed by the following expressions (1) and (2). The variable α is an arbitrary value.
Vertical magnification = α / VMAG (α> 0) (1)
Horizontal magnification = α / HMAG (α> 0) (2)
[0125]
In the above equation (1), for example, when VMAG> α, the vertical pixel is reduced, and when VMAG <α, the vertical pixel is enlarged. In addition, when VMAG = α, vertical pixel reduction processing and enlargement processing are not performed (same magnification processing).
[0126]
Here, in order to control the magnification using the variable PBZOOM_POSITION, the relationship between the variable PBZOOM_POSITION and the magnification parameter HMAG is defined as expressed by the following equation (3).
HMAG = HMAG_DEFAULT−PBZOOM_POSITION (3)
[0127]
Further, when the magnification parameter VMAG is calculated so as to keep the aspect ratio (aspect ratio) constant with respect to the change of the magnification parameter HMAG, the relationship between the magnification parameters VMAG and HMAG is expressed by the following equation (4).
VMAG = (VMAG_DEFAULT / HMAG_DEFAULT) × HMAG (4)
[0128]
Here, the variable VMAG_DEFAULT and the variable HMAG_DEFAULT are reference parameters (that is, when the reproduction zoom magnification is 1), and the input signal conversion magnification (reference magnification) at the reproduction zoom magnification of 1 is determined based on this value. Is determined. Therefore, the reference magnification is set so that both the vertical direction and the horizontal direction are equal to each other as represented by the following equation (5).
VMAG_DEFAULT = HMAG_DEFAULT = α (5)
[0129]
From the above equations (3) to (5), the relationship between the vertical magnification parameter VMAG, the horizontal magnification parameter HMAG, and the variable PBZOOM_POSITION is expressed by the following equation (6).
VMAG = HMAG = α-PBZOOM_POSITION (6)
[0130]
Further, the relationship between the variable PBZOOM_POSITION and the reproduction zoom magnification is expressed by the following equation (7).
Playback zoom magnification = α / (α−PBZOOM_POSITION) (7)
[0131]
FIG. 14 shows the relationship between the above-described variable PBZOOM_POSITION and playback zoom magnification. As shown in the figure, when the variable PBZOOM_POSITION is α / 2, the reproduction zoom magnification is doubled, and when the variable PBZOOM_POSITION is 3α / 4, the reproduction zoom magnification is four times.
[0132]
Returning to FIG. 12, in step S81, the camera control microcomputer 4 calculates various parameters for determining the enlargement area.
[0133]
Here, with reference to the flowchart of FIG. 15, the calculation processing of various parameters for determining the enlarged region in step S81 of FIG. 12 will be described in detail.
[0134]
In step S121, the camera control microcomputer 4 acquires information on the input signal. Here, the NTSC signal synchronization state flag NTSC_LOCK and the PAL signal synchronization state flag PAL_LOCK, which are information indicating whether the input signal is in the NTSC format or the PAL format, are acquired. Note that when there are a plurality of target input signals such as an input signal obtained by tape reproduction, a line input signal, or a DV input signal, the input signal information is also acquired.
[0135]
In step S122, the camera control microcomputer 4 calculates the size VIP of the region to be enlarged in the vertical direction and the x coordinate Vrem of the enlargement calculation start point.
[0136]
That is, as shown in FIG. 16, an enlargement in the case where the coordinates of the point A are set to the coordinates (0, 0) according to the following equation (8) from an external input signal having a vertical size of VSIZE and a horizontal size of HSIZE. The x coordinate Vrem of the calculation start point A ′ is calculated. Here, the variable VOP is the size of the output signal in the vertical direction.

[0137]
Then, the size VIP of the region to be enlarged in the vertical direction obtained while the vertical size VSIZE is calculated using the above equation (8) is stored in the RAM. This size VIP is required when calculating the amount of movement at the time of trimming in the vertical direction, which will be described later, or trimming.
[0138]
In step S123, the camera control microcomputer 4 calculates the size HIP of the region to be enlarged in the horizontal direction and the y coordinate Hrem of the enlargement calculation start point.
[0139]
That is, as shown in FIG. 16, an enlargement when the coordinate of the point A is set to the coordinates (0, 0) according to the following equation (9) from an external input signal having a vertical size of VSIZE and a horizontal size of HSIZE. The y coordinate Hrem of the calculation start point A ′ is calculated. Here, the variable HOP is the size of the output signal in the horizontal direction.

[0140]
Then, the size HIP of the region to be expanded in the horizontal direction obtained while the horizontal size HSIZE is calculated using the above equation (9) is stored in the RAM. This size HIP is required when calculating the horizontal enlargement calculation timing described later or the amount of movement during trimming.
[0141]
In the above equations (8) and (9), the x coordinate Vrem and the y coordinate Hrem of the enlargement calculation start point A ′ are calculated in units of 1 / β pixel. That is, one digit of Vrem and Hrem calculated corresponds to 1 / β pixel.
[0142]
In step S124, the camera control microcomputer 4 calculates the limit value MoveLimit_v in the vertical direction and the limit value MoveLimit_h in the horizontal direction for the enlargement center movement amount according to the following expressions (10) and (11). This limit value is a value indicating how far the user can move the enlargement area for trimming from the center. The limit value MoveLimit_v in the vertical direction is the x coordinate Vrem of the enlargement calculation start point A ′. The horizontal limit value MoveLimit_h substantially corresponds to the y coordinate Hrem of the enlargement calculation start point A ′.
MoveLimit_v = Vrem−A (A> 0) (10)
MoveLimit_h = Hrem-B (B> 0) (11)
[0143]
Note that the variable A and the variable B are values determined based on the number of taps processed by the pixel conversion processing unit 13.
[0144]
By the way, the vertical size VSIZE of the input signal, the horizontal size HSIZE of the input signal, the vertical size VOP of the output signal, and the horizontal size HOP of the output signal may vary depending on the type of external input signal. Different.
[0145]
Therefore, VSIZE, HSIZE, VOP, and HOP used in the calculation processing (Equation (8) and Equation (9)) of Steps S122 and S123 in FIG. 15 are the input signal information (that is, the processing of Step S121). Based on information indicating the type of input signal such as an input signal, line input signal, or DV input signal obtained by tape reproduction).
[0146]
Returning to FIG. 12, in step S <b> 82, the camera control microcomputer 4 moves amount information (flag UP, flag DOWM) indicating the rotation direction of the rotary dial 44 acquired from the human interface microcomputer 5 in order to enlarge the area desired by the user. , Flag RIGHT, or information such as flag LEFT) is used to calculate the enlargement center movement amount. In step S83, the camera control microcomputer 4 adds the enlargement center movement amount calculated in step S82 to the various parameters (vertical limit value MoveLimit_v and horizontal limit value MoveLimit_h) calculated in step S81. The final enlargement area is determined by reflecting, and final various parameters are calculated.
[0147]
Here, with reference to the flowcharts of FIG. 17 and FIG. 18, the processing of calculating the enlargement center movement amount and the final various parameters in steps S81 and S82 of FIG. 12 will be described in detail.
[0148]
In step S131, the camera control microcomputer 4 sets the initial value in the vertical direction to Vstart0 = Vrem. In step S <b> 132, the camera control microcomputer 4 calculates a vertical movement amount ΔMove_v per pulse of the rotary dial 44.
[0149]
Here, the vertical movement amount ΔMove_v is a value that returns the size obtained by dividing the vertical enlarged region VIP into M as a movement amount per pulse, as shown in FIG. Thus, by always setting the movement amount per pulse to a value obtained by dividing the enlarged region VIP into M (that is, ΔMove_v = VIP / M), the movement amount ratio with respect to the output image is constant regardless of the magnification. It becomes possible to keep on.
[0150]
In step S133, the camera control microcomputer 4 determines whether or not the user has instructed to move upward on the screen based on the movement amount information of the rotary dial 44 acquired from the user interface microcomputer 5, that is, with the flag UP = 1. If it is determined whether there is an instruction to move upward on the screen, the process proceeds to step S134, and the vertical movement amount ΔMove_v is subtracted from the vertical center movement amount Move_v.
[0151]
If it is determined in step S133 that the user has not instructed to move to the upper side of the screen, that is, if it is determined that the flag UP = 0, the process of step S134 is skipped, and the process proceeds to step S135. Proceed to
[0152]
In step S135, the camera control microcomputer 4 determines whether or not the user has instructed to move to the lower side of the screen based on the movement amount information of the rotary dial 44 acquired from the user interface microcomputer 5, that is, the flag DOWN = 1. If it is determined whether or not the movement to the lower side of the screen is instructed, the process proceeds to step S136, and the vertical movement amount ΔMove_v is added to the vertical center movement amount Move_v.
[0153]
If it is determined in step S135 that the user has not instructed to move to the lower side of the screen, that is, if it is determined that the flag DOWN = 0, the process in step S136 is skipped, and the process proceeds to step S135. The process proceeds to S137.
[0154]
In step S137, the camera control microcomputer 4 determines whether or not the calculated absolute value of the vertical center movement amount Move_v exceeds the limit value MoveLimit_v for the vertical center movement amount, and determines the vertical center. If it is determined that the absolute value of the movement amount Move_v exceeds the limit value MoveLimit_v for the expansion center movement amount in the vertical direction, the process proceeds to step S138, and the limit value MoveLimit_v for the expansion center movement amount is set to the vertical center movement amount Move_v. Set to.
[0155]
That is, when the absolute value of the vertical center movement amount Move_v exceeds the limit value MoveLimit_v for the vertical center movement amount, the center movement amount Move_v is pressed to the limit value MoveLimit_v. For example, even when the user continues to rotate the rotary dial 44 in a predetermined rotation direction, the absolute value of the center movement amount Move_v does not become larger than the limit value MoveLimit_v by the processing in steps S137 and S138. With this process, even if the rotary dial 44 is rotated more than necessary by the user, it is possible to avoid exceeding the excess area in the vertical direction caused by enlargement.
[0156]
When it is determined in step S137 that the absolute value of the vertical center movement amount Move_v does not exceed the limit value MoveLimit_v for the vertical expansion center movement amount, the process of step S138 is skipped, and the process proceeds to step S139. Proceed to
[0157]
In step S <b> 139, the camera control microcomputer 4 adds the vertical center movement amount Move_v to the initial value Vstart <b> 0 to calculate the vertical enlarged region start point Vstart. That is, as shown in FIG. 20, the enlarged region start point Vstart considering the center movement amount is calculated by adding the center movement amount Move_v to the initial value Vstart0.
[0158]
Here, the initial value Vstart0 is set to Vrem in the process of step S131, and Vrem is calculated in units of 1 / β pixels as described above. Therefore, in step S140, the camera control microcomputer 4 calculates The enlarged vertical area start point Vstart is divided into an integer pixel portion INT [Vstart] and a decimal pixel portion Dec [Vstart]. The separated integer pixel portion INT [Vstart] is set to VstartINT, and the decimal pixel portion Dec [Vstart] is set to VstartDec.
[0159]
In step S141, the camera control microcomputer 4 performs interlace processing such as adjusting the integer pixel portion VstartINT and the fractional pixel portion VstartDec for each field, and correcting the outputs in each field so that they can be interlaced.
[0160]
In step S142, the camera control microcomputer 4 calculates the enlargement calculation stop point VstopINT by adding the size VIP of the area to be enlarged to the enlargement area start point (integer pixel portion) VstartINT.
[0161]
Through the processes in steps S131 to S142 described above, the final enlarged region in the vertical direction is determined, and final various parameters are calculated.
[0162]
Subsequently, a process for determining a final enlargement region in the horizontal direction is performed. In step S143, the camera control microcomputer 4 sets the initial value in the horizontal direction to Hstart0 = Hrem. In step S144, the camera control microcomputer 4 calculates a horizontal movement amount ΔMove_h per pulse of the rotary dial 44.
[0163]
Here, the horizontal movement amount ΔMove_h is a value that returns a size obtained by dividing the horizontal enlarged region HIP into N as a movement amount per pulse, as shown in FIG. Thus, by always setting the movement amount per pulse to a value obtained by dividing the enlarged region HIP into N (ie, ΔMove_h = HIP / N), the movement amount ratio with respect to the output image is constant regardless of the magnification. It becomes possible to keep on.
[0164]
In step S145, the camera control microcomputer 4 determines whether or not the user has instructed to move to the left side of the screen based on the movement amount information of the rotary dial 44 acquired from the user interface microcomputer 5, that is, the flag LEFT = 1. If it is determined whether there is an instruction to move to the left side of the screen, the process proceeds to step S146, and the horizontal movement amount ΔMove_h is subtracted from the horizontal center movement amount Move_h.
[0165]
In step S145, if it is determined that the user has not instructed to move to the left side of the screen, that is, if it is determined that the flag LEFT = 0, the process of step S146 is skipped, and the process proceeds to step S147. Proceed to
[0166]
In step S147, the camera control microcomputer 4 determines whether or not the user has instructed movement to the right side of the screen based on the movement amount information of the rotary dial 44 acquired from the user interface microcomputer 5, that is, with the flag RIGHT = 1. If it is determined whether there is an instruction to move to the right side of the screen, the process proceeds to step S148, and the horizontal movement amount ΔMove_h is added to the horizontal center movement amount Move_h.
[0167]
If it is determined in step S147 that the user has not instructed to move to the right side of the screen, that is, if it is determined that the flag RIGHT = 0, the process in step S148 is skipped, and the process proceeds to step S149. Proceed to
[0168]
In step S149, the camera control microcomputer 4 determines whether or not the calculated absolute value of the horizontal center movement amount Move_h exceeds a limit value MoveLimit_h for the horizontal expansion center movement amount, and determines the horizontal center. When it is determined that the absolute value of the movement amount Move_h exceeds the limit value MoveLimit_h for the expansion center movement amount in the horizontal direction, the process proceeds to step S150, and the limit value MoveLimit_h for the expansion center movement amount is set to the horizontal center movement amount Move_h. Set to.
[0169]
That is, when the absolute value of the horizontal center movement amount Move_h exceeds the limit value MoveLimit_h for the horizontal expansion center movement amount, the center movement amount Move_h is pressed to the limit value MoveLimit_h. For example, even when the user continues to rotate the rotary dial 44 in a predetermined rotation direction, the absolute value of the center movement amount Move_h does not become larger than the limit value MoveLimit_h by the processing in steps S149 and S150. With this process, even if the rotary dial 44 is rotated more than necessary by the user, it is possible to avoid exceeding the horizontal surplus area caused by enlargement.
[0170]
If it is determined in step S149 that the absolute value of the horizontal center movement amount Move_h does not exceed the limit value MoveLimit_h for the horizontal expansion center movement amount, the process of step S150 is skipped, and the process is performed in step S151. Proceed to
[0171]
In step S151, the camera control microcomputer 4 adds the horizontal center movement amount Move_h to the initial value Hstart0 to calculate the horizontal enlarged region start point Hstart. That is, as shown in FIG. 20, the enlarged region start point Hstart considering the center movement amount is calculated by adding the center movement amount Move_h to the initial value Hstart0.
[0172]
Here, the initial value Hstart0 is set to Hrem in the process of step S143, and as described above, since Hrem is calculated in units of 1 / β pixels, the camera control microcomputer 4 calculates in step S152. The horizontal expanded area start point Hstart thus obtained is divided into an integer pixel portion INT [Hstart] and a decimal pixel portion Dec [Hstart]. The separated integer pixel portion INT [Hstart] is set to HstartINT, and the decimal pixel portion Dec [Hstart] is set to HstartDec.
[0173]
In step S153, the camera control microcomputer 4 adds the size HIP of the region to be enlarged to the enlargement region start point (integer pixel portion) HstartINT, and calculates the enlargement calculation stop point HstopINT.
[0174]
Through the processes in steps S143 to S153, the final horizontal enlargement area is determined, and final various parameters are calculated.
[0175]
Returning to step S84 in FIG. 12, the camera control microcomputer 4 processes the calculated final various parameters into a format suitable for the target camera signal processing IC 3 and sets it in the communication buffer, and then the process ends. .
[0176]
As described above, the electronic zoom can be easily performed by applying the present invention to any external input signal in the NTSC format or the PAL format.
[0177]
In addition, since clock rate conversion is performed at the time of electronic zoom, it is possible to realize electronic zoom of an input image with high performance without increasing the circuit scale.
[0178]
In the above description, the case where the electronic zoom is used has been described as an example. However, the present invention is not limited to this, and can be applied to other camera system effect signal processing, for example.
[0179]
In the future, when a tape recorded in HD (High Definition) format is played back, playback zoomed, and viewed in NTSC format or PAL format, HD format is not oversampled to NTSC format or PAL format. It becomes data. Accordingly, three types of zoom areas of the reduction side, the same magnification, and the enlargement side are generated, and the zoom operation in the reduction or equal magnification region enables zooming without image degradation.
[0180]
The series of processes described above can also be executed by software. The software is a computer in which the program constituting the software is incorporated in dedicated hardware, or various functions can be executed by installing various programs, for example, a general-purpose personal computer For example, it is installed from a recording medium.
[0181]
The recording medium is distributed to provide a program to the user separately from the computer, and includes a magnetic disk 31 (including a floppy disk) on which the program is recorded, an optical disk 32 (CD-ROM (Compact Disk-Read Only). Memory, DVD (Digital Versatile Disk)), magneto-optical disk 33 (including MD (Mini-Disk)), or a package medium including a semiconductor memory 34 or the like.
[0182]
In the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in chronological order according to the described order, but is not necessarily performed in chronological order. It also includes processes that are executed individually.
[0183]
【The invention's effect】
  The present inventionInAccording to,The electronic zoom of the input image can be performed with high performance without increasing the circuit scale.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of the internal configuration of a video camera to which the present invention is applied.
FIG. 2 is a block diagram illustrating a detailed configuration example of the camera control microcomputer and human interface of FIG. 1 and peripheral devices.
FIG. 3 is a flowchart for explaining playback zoom processing;
FIG. 4 is a flowchart for explaining camera control microcomputer processing;
FIG. 5 is a flowchart following FIG. 4;
FIG. 6 is a diagram for explaining timer interruption;
FIG. 7 is a diagram for explaining timer interrupt of an NTSC format VD input signal;
FIG. 8 is a diagram for explaining another example of an NTSC format VD input signal timer interrupt;
FIG. 9 is a diagram for explaining timer interruption of a VD input signal in a PAL format.
FIG. 10 is a diagram for explaining a timer interrupt of a VD input signal in a PAL format in another example.
FIG. 11 is a diagram for explaining a timer interrupt in a free-running state.
FIG. 12 is a flowchart for explaining playback zoom control processing;
FIG. 13 is a flowchart for explaining in detail the reproduction zoom position control process in step S79 of FIG. 12;
FIG. 14 is a diagram illustrating a relationship between a variable PBZOOM_POSITION and a reproduction zoom magnification.
FIG. 15 is a flowchart for explaining in detail the calculation processing of various parameters for determining an enlarged region in step S81 of FIG.
FIG. 16 is a diagram for explaining how an enlarged region is determined from an external input signal.
FIG. 17 is a flowchart for explaining in detail the calculation processing of the enlargement center movement amount and final various parameters in steps S82 and S83 of FIG. 12;
FIG. 18 is a flowchart following FIG. 17;
FIG. 19 is a diagram for explaining movement amount calculation processing;
FIG. 20 is a diagram for explaining how a final enlarged region is determined.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Imager, 2 Front end part, 3 Camera signal processing IC, 4 Camera control microcomputer, 5 Human interface microcomputer, 6 Drive, 31 Optical disk, 32 Magneto-optical disk, 33, 34 Semiconductor memory, 11 Camera signal processing part, 13 Pixel conversion Processing unit, 14 large-capacity RAM, 16 external IC interface, 17 clock rate converter, 19 microcomputer interface, 20 sync signal generation unit, 41 CAM / VTR mode switch, 42 playback zoom mode switch, 43 zoom key, 44 rotary dial, 45 Display

Claims (7)

In an image recording / reproducing apparatus including a signal processing unit that performs signal processing on an input image signal and a control unit that controls the signal processing unit,
The signal processing unit
For each of the image signal obtained by imaging and the image signal input from the outside, a synchronization signal generation means for generating an output synchronization signal used for outputting the image signal and outputting to the control unit;
Pixel conversion means for converting a predetermined area on the image corresponding to the image signal into a predetermined size for each of the image signal obtained by imaging and the image signal input from the outside;
Including
The controller is
Generation for generating a communication synchronization signal used to control the signal processing unit in synchronization with the output synchronization signal based on a down edge generated in the output synchronization signal output from the synchronization signal generation means Means,
Control means for controlling the signal processing unit based on the generated communication synchronization signal ;
including
Images recording and reproducing apparatus. The controller is
Acquisition means for acquiring a zoom information corresponding to the operation by Yu over THE,
Based on the obtained have been the zoom information collected, a calculation unit which the predetermined region is calculated magnification to be converted into the predetermined size
Further including
The control unit causes the pixel conversion unit in the signal processing unit to convert the predetermined area into a size corresponding to the magnification.
Image recording and reproducing apparatus according to 請 Motomeko 1. The signal processing unit
Data format conversion means for converting the image signal input from the outside into a predetermined data format;
Wherein said image signal converted by the data format conversion means further includes a clock change means changing put on the clock of the signal processing unit,
The pixel conversion unit converts a predetermined area on the image corresponding to the image signal changed to the clock of the signal processing unit into a predetermined size.
Image recording and reproducing apparatus according to 請 Motomeko 1. The output synchronization signal of the image signal input from the outside is a synchronization signal of either NTSC (National Television System Committee) format or PAL (Phase Alternation Line) format.
Image recording and reproducing apparatus according to 請 Motomeko 1. In an image recording / reproducing method of an image recording / reproducing apparatus comprising: a signal processing unit that performs signal processing on an input image signal; and a control unit that controls the signal processing unit.
In the signal processing unit,
For each of the image signal obtained by imaging and the image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting to the control unit;
A pixel conversion step for converting a predetermined area on the image corresponding to the image signal into a predetermined size for each of the image signal obtained by imaging and the image signal input from the outside,
In the control unit,
Generates a communication synchronization signal used to control the signal processing unit in synchronization with the output synchronization signal, based on the down edge generated in the output synchronization signal output by the processing of the synchronization signal generation step Generating step to
Images recording and reproducing method and a control step of controlling the signal processing unit based on the generated the communication sync signal. In a computer of an image recording / reproducing apparatus comprising a signal processing unit that performs signal processing on an input image signal, and a control unit that controls the signal processing unit,
In the signal processing unit,
For each of the image signal obtained by imaging and the image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting to the control unit;
A pixel conversion step for converting a predetermined area on the image corresponding to the image signal into a predetermined size for each of the image signal obtained by imaging and the image signal input from the outside,
In the control unit,
Generates a communication synchronization signal used to control the signal processing unit in synchronization with the output synchronization signal, based on the down edge generated in the output synchronization signal output by the processing of the synchronization signal generation step Generating step to
Based on the generated the communication sync signal to execute the processing including a control step for controlling the signal processing unit, the recording medium from which a computer readable program is recorded. In a computer of an image recording / reproducing apparatus comprising a signal processing unit that performs signal processing on an input image signal, and a control unit that controls the signal processing unit,
In the signal processing unit,
For each of the image signal obtained by imaging and the image signal input from the outside, a synchronization signal generation step for generating an output synchronization signal used for outputting the image signal and outputting to the control unit;
A pixel conversion step for converting a predetermined area on the image corresponding to the image signal into a predetermined size for each of the image signal obtained by imaging and the image signal input from the outside,
In the control unit,
Generates a communication synchronization signal used to control the signal processing unit in synchronization with the output synchronization signal , based on the down edge generated in the output synchronization signal output by the processing of the synchronization signal generation step Generating step to
Program for executing the processing including a control step for controlling the signal processing unit based on the generated the communication sync signal.

Images