JPH0810503B2 - Magnetic recording / reproducing device - Google Patents
Magnetic recording / reproducing deviceInfo
- Publication number
- JPH0810503B2 JPH0810503B2 JP61238344A JP23834486A JPH0810503B2 JP H0810503 B2 JPH0810503 B2 JP H0810503B2 JP 61238344 A JP61238344 A JP 61238344A JP 23834486 A JP23834486 A JP 23834486A JP H0810503 B2 JPH0810503 B2 JP H0810503B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- recording
- time
- magnetic
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は磁気記録再生装置の記録媒体残量計測とこれ
に伴う処理回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium remaining amount measurement of a magnetic recording / reproducing apparatus and a processing circuit associated therewith.
従来の技術 従来、磁気記録再生装置ではテープ残量を計算で求め
ている。この計算する方法は、例えば特開昭61−71440
号公報にも示されている様に、 T2＝T0−T1 ……（１） から求めている。2. Description of the Related Art Conventionally, in a magnetic recording / reproducing apparatus, the remaining tape amount is calculated. This calculation method is disclosed in, for example, JP-A-61-71440.
As shown in the publication, T 2 = T 0 −T 1 (1) Seeking from.
ここで、T0は録再可能な全テープ時間（これはテープ
走行速度に依存する）、T1は巻取り側リールに巻かれて
いるテープ残量時間、T2は供給側リールに巻かれている
テープ残量時間、P1は現時点の巻き取り側リールの回転
周期、P2は供給側リールの回転周期、r0は最大テープ巻
き径，及びＲはリールのハブ径をそれぞれ示している。
従って、従来の磁気記録再生装置では、テープの種類
（r0,R），テープ速度（T0），及び巻き取り側，供給側
リールの回転周期（P1,P2）を計測し、これらの計測値
を上記計算式を用いて、テープ残量時間T2を求めてい
た。Where T 0 is the total rewritable tape time (this depends on the tape running speed), T 1 is the remaining tape time on the take-up reel, and T 2 is the supply reel. Tape remaining time, P 1 is the current rotation cycle of the winding reel, P 2 is the rotation cycle of the supply reel, r 0 is the maximum tape winding diameter, and R is the reel hub diameter. .
Therefore, in the conventional magnetic recording / reproducing apparatus, the tape type (r 0 , R), the tape speed (T 0 ) and the rotation period (P 1 , P 2 ) of the winding side and the supply side reel are measured, The tape remaining time T 2 was obtained by using the above-mentioned calculation formula for the measurement value of.
そしてタイマ予約で記録開始時間と記録終了時間を設
定した時、設定時間内にできるだけ記録が成される様に
予約時に標準記録速度と遅い記録速度のうちのいずれか
を自動的に選択する様にしていた。Then, when recording start time and recording end time are set by timer reservation, either standard recording speed or slow recording speed is automatically selected at the time of reservation so that recording is performed within the set time as much as possible. Was there.
発明が解決しようとする問題点 しかしながら上記のような構成では、テープ厚みや、
リールのハブ径のバラツキもしくはテープロールへのエ
アーフィルムの出来具合による最大テープ巻き径がバラ
ツクためテープ残量時間を正確に計測することができな
かった。Problems to be Solved by the Invention However, in the above configuration, the tape thickness,
The remaining tape time could not be accurately measured because the maximum tape winding diameter varied due to variations in the reel hub diameter or the quality of the air film on the tape roll.
また記録設定時間が少しでもテープ残量時間より大き
いと、予約時に自動的に遅い記録速度に設定されるので
録画の画質が悪くなるという問題があった。（一般的に
速い記録速度の方が遅い記録速度よりもトラック幅が大
きいため録画画質が良い。） 問題点を解決するための手段 磁気テープをV1とV1より遅いV2の２つの定速モードで
走行させうるテープ駆動手段の、記録する前に一担前記
磁気テープを終端まで走行させて前記磁気テープの残量
長さＬを計測するテープ残量計測手段と、記録時間Ｔを
設定する記録時間設定手段と、 Ｌ＝L1＋L2になるように前記テープ駆動手段のテープ駆
動速度を記録途中でV1からV2に切り替えるテープ駆動速
度切り替え手段という構成を備えたものである。Further, if the recording setting time is slightly longer than the remaining tape time, the recording speed is automatically set to low at the time of reservation, so that there is a problem that the image quality of recording deteriorates. (Generally, a faster recording speed has a larger track width than a slower recording speed, and thus the recording image quality is better.) Means for solving the problem With the magnetic tape in two constant speed modes of V1 and V2 slower than V1. A tape remaining amount measuring unit that measures the remaining length L of the magnetic tape by moving the magnetic tape to the end before recording by a tape driving unit that can be moved, and a recording time for setting a recording time T. Setting means, The tape drive speed switching means switches the tape drive speed of the tape drive means from V1 to V2 during recording so that L = L1 + L2.
作用 本発明は上記した構成によって、磁気テープの走行し
た長さ（所定位置からテープ終端までのテープ長）をテ
ープ長計測手段によって直接計測し、該テープ長とテー
プの定速駆動速度とからテープ残量時間を計測するので
テープの厚みや、ハブ径や、最大テープ巻き径のバラツ
キの影響を受けず正確なテープ残量時間を計測できるも
のである。With the above-described structure, the present invention directly measures the running length of the magnetic tape (the tape length from the predetermined position to the end of the tape) by the tape length measuring means, and determines the tape length and the constant drive speed of the tape. Since the remaining time is measured, the tape remaining time can be accurately measured without being affected by variations in tape thickness, hub diameter, and maximum tape winding diameter.
また、記録時時間がテープ残量時間よりも大なる時
は、できるだけ速い方の記録速度で記録できる様に記録
途中でテープ駆動速度を切り替える様にして録画画質の
良好な記録をし得る様にしたものである。Also, when the recording time is longer than the remaining tape time, the tape drive speed is switched during recording so that recording with good recording quality can be performed so that recording can be performed at the faster recording speed. It was done.
実施例 以下本発明の一実施例の磁気記録再生装置について図
面を参照しながら説明する。Embodiment A magnetic recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例の磁気記録再生装置の要部
平面図である。第１図において、カセット１内の供給リ
ール2,巻取りリール３に巻回された磁気テープ４は、テ
ープ引き出し手段5,6,7によってカセット外部に引き出
され、回転ローラ8,回転ヘッドシリンダ９に添接され
る。回転ローラ８は磁気テープ４の走行によって回転さ
せられその回転数は周知の光や磁気を利用したエンコー
ダによって計測できる様にしてあるので結局磁気テープ
の走行長さを計測できる。FIG. 1 is a plan view of an essential part of a magnetic recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, the magnetic tape 4 wound around the supply reel 2 and the take-up reel 3 in the cassette 1 is pulled out of the cassette by the tape pull-out means 5, 6, and 7, and the rotary roller 8 and the rotary head cylinder 9 are provided. Will be inscribed on. Since the rotating roller 8 is rotated by the running of the magnetic tape 4 and the number of rotations thereof can be measured by a known encoder using light or magnetism, the running length of the magnetic tape can be finally measured.
キャプスタン10,ピンチローラ11は磁気テープ４を挾
持した時標準速度V1とそれよりも遅いV2の２つのテープ
駆動速度で磁気テープ４を駆動できる様にしてある。駆
動車12は転接アイドラ13を介して供給リール台２もしく
は巻取りリール台３を駆動する。The capstan 10 and the pinch roller 11 are designed so that the magnetic tape 4 can be driven at two tape drive speeds of a standard speed V1 and a slower speed V2 when the magnetic tape 4 is held. The drive wheel 12 drives the supply reel base 2 or the take-up reel base 3 via the rolling contact idler 13.
以上のように構成された磁気記録再生装置について、
第２図の制御回路図、及び第３図の動作フローチャート
に基づいて動作を説明する。Regarding the magnetic recording / reproducing device configured as described above,
The operation will be described based on the control circuit diagram of FIG. 2 and the operation flowchart of FIG.
タイマ予約釦14で記録開始時刻と記録終了時刻を設定
すると駆動車12が時計回転するので転接アイドラ13を介
して巻取りリール台３が回転し磁気テープ４を右方へ移
送する。従って回転ローラ８も回転をしはじめ前記した
エンコーダにより回転ローラ８の回転数を計測しはじめ
る。磁気テープが終端までいくと周知の終端検出手段に
よって駆動車12が反転し今度は転接アイドラ13が供給リ
ール台側に当節し供給リール台２が磁気テープ４を逆方
向に移送するので回転ローラ８も逆回転し先程エンコー
ダで計測した回転数が０になると駆動車13の回転を止め
元のテープ位置にもどる様にしてある。巻取りリール台
３が磁気テープ４を駆動しはじめてからテープ終端に到
るまでの回転ローラ８の回転数が計測でき、回転ローラ
８の径は既知であるので結局テープ残量計測回路15が終
端までのテープ長Ｌを計測する。When the recording start time and the recording end time are set by the timer reservation button 14, the drive wheel 12 rotates clockwise, so that the take-up reel stand 3 rotates via the rolling idler 13 to transfer the magnetic tape 4 to the right. Therefore, the rotary roller 8 also starts to rotate and the rotational speed of the rotary roller 8 starts to be measured by the encoder. When the magnetic tape reaches the end, the drive wheel 12 is reversed by the well-known end detection means, and this time the rolling idler 13 hits the supply reel base side, and the supply reel base 2 transfers the magnetic tape 4 in the opposite direction, thus rotating. When the roller 8 also rotates in the reverse direction and the number of rotations measured by the encoder becomes 0, the rotation of the drive wheel 13 is stopped and the tape is returned to the original tape position. Since the number of rotations of the rotating roller 8 from the time when the take-up reel stand 3 starts to drive the magnetic tape 4 to the end of the tape can be measured, and the diameter of the rotating roller 8 is known, the tape remaining amount measuring circuit 15 ends after all. Measure the tape length L up to.
次に比較回路16によってタイマ予約による記録時間Ｔ
が を判断し、この時は L1＋L2＝Ｌになる様に、できる丈V1での記録時間が長く
なる様に記録時のテープ駆動速度を記録途中で切り替え
る様に周知の速度切り替え回路17を具備している。Next, the comparison circuit 16 causes the timer-reserved recording time T
But And at this time A known speed switching circuit 17 is provided so as to switch the tape drive speed during recording so as to lengthen the recording time at the length V1 so that L1 + L2 = L.
以上のように本実施例によれば磁気テープをV1とV1よ
り遅いV2の２つの定速モードで走行させうるテープ駆動
手段と、記録する前に一担前記磁気テープを終端まで走
行させて前記磁気テープの残量長さＬを計測するテープ
残量計測手段と、記録時間Ｔを設定する記録時間設定手
段と、 なる時は、 Ｌ＝L1＋L2になるように前記テープ駆動手段のテープ駆
動速度を記録途中でV1からV2に切り替えるテープ駆動速
度切り替え手段とを設けることにより、予約記録時間と
テープ残量時間とを比較し、できる丈V1なるテープ駆動
速度で記録する様にしてある。As described above, according to the present embodiment, the tape driving means that can drive the magnetic tape in two constant speed modes of V1 and V2, which is slower than V1, and the magnetic tape that is run to the end before recording is used. A tape remaining amount measuring means for measuring the remaining length L of the magnetic tape, a recording time setting means for setting the recording time T, When By providing tape drive speed switching means for switching the tape drive speed of the tape drive means from V1 to V2 during recording so that L = L1 + L2, the reserved recording time and the remaining tape time can be compared and It records at the tape drive speed of V1.
発明の効果 以上のように本発明は、磁気テープをV1とV1より遅い
V2の２つの定速モードで走行させうるテープ駆動手段
と、記録する前に一担前記磁気テープを終端まで走行さ
せて前記磁気テープの残量長さＬを計測するテープ残量
計測手段と、記録時間Ｔを設定する記録時間設定手段
と、 なる時は、 Ｌ＝L1＋L2になるように前記テープ駆動手段のテープ駆
動速度を記録途中でV1からV2に切り替えるテープ駆動速
度切り替え手段とを設けることにより、予約記録時間と
テープ残量時間とを比較し、できる丈、速い方のテープ
速度V1で記録する様にしてあるので記録画質が良好にな
る。As described above, the present invention makes the magnetic tape slower than V1 and V1.
Tape drive means capable of running in two constant speed modes of V2; tape remaining amount measuring means for running the magnetic tape to the end before recording to measure the remaining length L of the magnetic tape; Recording time setting means for setting the recording time T, When By providing tape drive speed switching means for switching the tape drive speed of the tape drive means from V1 to V2 during recording so that L = L1 + L2, the reserved recording time and the remaining tape time can be compared and Since the recording is performed at the faster tape speed V1, the recording image quality is improved.
第１図は本発明の一実施例における要部平面図、第２図
は制御回路図、第３図は動作フローチャートである。 １……カセット、４……磁気テープ、８……回転ロー
ラ。FIG. 1 is a plan view of an essential part of an embodiment of the present invention, FIG. 2 is a control circuit diagram, and FIG. 3 is an operation flowchart. 1 ... Cassette, 4 ... Magnetic tape, 8 ... Rotating roller.
Claims (1)
速モードで走行させうるテープ駆動手段と、記録する前
に一担前記磁気テープを終端まで走行させて前記磁気テ
ープの残量長さＬを計測するテープ残量計測手段と、記
録時間Ｔを設定する記録時間設定手段と、 Ｌ＝L1＋L2になるように前記テープ駆動手段のテープ駆
動速度を記録途中でV1からV2に切り替えるテープ駆動速
度切り替え手段とを具備した磁気記録再生装置。1. A tape drive means capable of running a magnetic tape in two constant speed modes of V1 and V2 which is slower than V1; and a remaining amount of the magnetic tape which is run by one end of the magnetic tape before recording. Tape remaining amount measuring means for measuring the length L, recording time setting means for setting the recording time T, A magnetic recording / reproducing apparatus comprising tape drive speed switching means for switching the tape drive speed of the tape drive means from V1 to V2 during recording so that L = L1 + L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238344A JPH0810503B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61238344A JPH0810503B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6394451A JPS6394451A (en) | 1988-04-25 |
| JPH0810503B2 true JPH0810503B2 (en) | 1996-01-31 |
Family
ID=17028802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61238344A Expired - Fee Related JPH0810503B2 (en) | 1986-10-07 | 1986-10-07 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810503B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02270151A (en) * | 1989-04-12 | 1990-11-05 | Mitsubishi Electric Corp | Recorder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841456A (en) * | 1981-09-01 | 1983-03-10 | Victor Co Of Japan Ltd | Tape recorder |
| JPS6098127U (en) * | 1983-12-07 | 1985-07-04 | ソニー株式会社 | recording device |
-
1986
- 1986-10-07 JP JP61238344A patent/JPH0810503B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6394451A (en) | 1988-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |