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JPH0472299B2 - - Google Patents
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JPH0472299B2 - - Google Patents

Info

Publication number
JPH0472299B2
JPH0472299B2 JP57175202A JP17520282A JPH0472299B2 JP H0472299 B2 JPH0472299 B2 JP H0472299B2 JP 57175202 A JP57175202 A JP 57175202A JP 17520282 A JP17520282 A JP 17520282A JP H0472299 B2 JPH0472299 B2 JP H0472299B2
Authority
JP
Japan
Prior art keywords
tape
signal
pulses
beginning
reel
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 - Lifetime
Application number
JP57175202A
Other languages
Japanese (ja)
Other versions
JPS5965956A (en
Inventor
Shoji Iwasaki
Atsushi Oonuma
Takeshi Kikuta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP57175202A priority Critical patent/JPS5965956A/en
Publication of JPS5965956A publication Critical patent/JPS5965956A/en
Publication of JPH0472299B2 publication Critical patent/JPH0472299B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02Control of operating function, e.g. switching from recording to reproducing

Description

【発明の詳細な説明】 本発明は速送り時、テープの巻き始めと巻き終
りのように速度変化の大きいテープ部分でも安定
に頭出しを可能にする方法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method that enables stable cueing even in tape sections where the speed changes greatly, such as between the start and end of tape winding, during fast feeding.

従来の頭出し方法では、テープの無信号部分を
検出し、テープ速度に関係なく所定時間無信号部
分があることを検出して、停止命令を出してい
た。しかしながら、音楽等が録音されたテープを
頭出しのために速送りすると、長時間テープ等で
はテープの巻き始め部分と巻き終り部分ではテー
プの速度が2.5倍近く違うことになつてしまう。
In the conventional cueing method, a stop command is issued by detecting a non-signal portion of the tape and detecting that there is a non-signal portion for a predetermined period of time regardless of the tape speed. However, when a tape on which music or the like is recorded is fast-forwarded to find the beginning, the speed of the tape ends up being approximately 2.5 times different between the beginning and the end of the tape if it is a long tape.

従つて、テープの巻き始めにて十分無信号部分
を検出するのに必要な時間に設定すると、巻き終
り部分ではテープの送り量が2.5倍となるので、
その時間内では無信号部分を通り過ぎてしまい無
信号部分であると検出しなかつたり、逆に巻き終
り部分で無信号部分を検出するように短い時間設
定を行うと、曲の途中に短い時間の無信号部分を
有する曲などでは巻き始めの時にその短い無信号
部分をも誤検出してしまい頭出しが不安定であつ
た。
Therefore, if you set the time required to detect a sufficient no-signal area at the beginning of tape winding, the tape feed amount will be 2.5 times as much at the end of winding.
If you set a short time so that it passes through a no-signal part within that time and is not detected as a no-signal part, or if you set a short time so that the no-signal part is detected at the end of winding, there will be a short time in the middle of the song. For songs that have no-signal parts, the short no-signal parts were also erroneously detected at the beginning of winding, making cueing unstable.

そこでテープの無信号部分のリール回転パルス
を計数し、所定数のパルスを計数した時、停止命
令を出すことが考えられる。
Therefore, it is conceivable to count the reel rotation pulses in the non-signal portion of the tape and issue a stop command when a predetermined number of pulses have been counted.

しかしこの場合、テープの巻き始めで十分曲間
の無信号部分を検出するのに必要なパルス数に設
定すると、巻き終り部分では検出は可能である
が、停止命令の出るのが早すぎてしまう。
However, in this case, if you set the number of pulses necessary to detect the no-signal part between songs at the beginning of tape winding, detection is possible at the end of tape winding, but the stop command is issued too early. .

本発明の目的は、テープの巻き始めであつても
巻き終りであつても安定して無信号部分を検出す
ることができる速送り時のテープの頭出し方法を
提供することである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for finding the beginning of a tape during fast forwarding, which can stably detect a no-signal portion whether at the beginning or end of tape winding.

上記目的を達成するために、本発明による速送
り時のテープの頭出し方法は、上述した無信号部
分での所定の時間設定と所定のリール回転パルス
のカウント数設定とを併用して安定した無信号部
分の検出を可能とするため、リール回転センサを
設け、テープの無信号部分の先端が検出されてか
ら、一定時間だけ後の時刻から巻き取られている
方のリールの回転センサからのパルスを計数し始
め一定数のパルスが計数された時テープの駆動を
停止することを要旨とする。
In order to achieve the above object, the tape cueing method during fast forwarding according to the present invention combines the predetermined time setting in the no-signal portion described above and the predetermined count number setting of reel rotation pulses to stabilize the tape. In order to enable detection of the no-signal portion, a reel rotation sensor is installed, and from the time a certain period of time after the tip of the no-signal portion of the tape is detected, the rotation sensor of the reel being wound is detected. The gist is to start counting pulses and stop driving the tape when a certain number of pulses are counted.

以下に、図面を参照しながら、実施例を用いて
本発明を一層詳細に説明するが、それらは例示に
過ぎず、本発明の枠を越えることなしにいろいろ
な変形や改良があり得ることは勿論である。
Hereinafter, the present invention will be explained in more detail using examples with reference to the drawings, but these are merely illustrative and it is understood that various modifications and improvements may be made without going beyond the scope of the present invention. Of course.

第1図は本発明による速送り時のテープの頭出
し方法を実施するための装置の構成を示すブロツ
ク図で、図中1は再生ヘツド、2は前置増幅器、
3は主増幅器、4はスピーカ、5はバツフア増幅
器、6は無信号検出回路、7Aおよび7Bはリー
ル回転センサ、8は巻き取つている方のリールを
選択すセンサ選択回路、9はカウンタ、10は停
止信号出力回路、11は操作部、12はメカニズ
ム制御回路、13はリールを回転させるモータで
ある。
FIG. 1 is a block diagram showing the configuration of an apparatus for carrying out the method of finding the beginning of a tape during fast forwarding according to the present invention, in which 1 is a playback head, 2 is a preamplifier,
3 is a main amplifier, 4 is a speaker, 5 is a buffer amplifier, 6 is a no-signal detection circuit, 7A and 7B are reel rotation sensors, 8 is a sensor selection circuit for selecting the reel being wound, 9 is a counter, 10 1 is a stop signal output circuit, 11 is an operating section, 12 is a mechanism control circuit, and 13 is a motor for rotating the reel.

第2図は第1図に示す装置においてa,b,
c,d,eで示す位置における信号のタイミン
グ・チヤートで、aは音声、bは無信号部分の検
出信号、cはリール回転信号、dはカウンタ出
力、eは停止命令を表す。
Figure 2 shows a, b,
This is a timing chart of the signals at the positions indicated by c, d, and e, where a represents the voice, b represents the detection signal of the no-signal portion, c represents the reel rotation signal, d represents the counter output, and e represents the stop command.

第2図を用いて第1図に示す装置の動作をc−
60の場合について以下に一層詳しく説明する。但
し通常のテープ再生速度4.75cm/secの時、曲間
の無信号の期間の長さT0=5secとする。また、
無信号検出回路6が無信号を検出してからカウン
タ9が計数し始めるまでの時間T1は、テープ速
度に無関係に40msecとする。
Using FIG. 2, the operation of the device shown in FIG.
The case of 60 will be explained in more detail below. However, when the normal tape playback speed is 4.75 cm/sec, the length of the no-signal period between songs is T 0 =5 sec. Also,
The time T1 from when the no-signal detection circuit 6 detects no signal until the counter 9 starts counting is 40 msec regardless of the tape speed.

(a) テープ巻き始めにおいては、テープは第3図
に示すようになつており、巻き取られる方のリ
ールのテープの外径は約50mmでテープは矢印の
方向に送られ、他方のリールに巻き取られる。
速送りにすると、テープは通常の再生速度に対
して15倍程度の速度で送られる。即ち、このと
き、 T0=5000msec/15=333msec T2=T0−T1=333−40=293mm である。無信号部分のテープの長さは 47.5mm/sec×5sec=237.5mm であるから、それに対応するリールの回転数
は、 237.5mm/50mm×π≒1.5 である。リール回転センサ7Aおよび7Bは1
回転当り6パルス発生するものとすれば、無信
号部分に対応するパルス数は、 6×1.5=9 したがつて、パルスの周期T4は T4=333msec/9=37msec である。
(a) At the beginning of tape winding, the tape is as shown in Figure 3, the outer diameter of the tape on the reel being wound is approximately 50 mm, the tape is fed in the direction of the arrow, and the tape is fed onto the other reel. be wound up.
When set to fast forward, the tape is advanced at approximately 15 times the normal playback speed. That is, at this time, T0 =5000msec/15=333msec T2 = T0 - T1 =333-40=293mm. Since the length of the tape in the no-signal part is 47.5 mm/sec x 5 sec = 237.5 mm, the corresponding reel rotation speed is 237.5 mm/50 mm x π≒1.5. Reel rotation sensors 7A and 7B are 1
Assuming that 6 pulses are generated per rotation, the number of pulses corresponding to the no-signal portion is 6×1.5=9. Therefore, the pulse period T 4 is T 4 =333 msec/9=37 msec.

カウンタ9がリール回転センサ7Aまたは7
Bからのパルスを5個計数したときに停止信号
出力回路10がメカニズム制御回路12に停止
信号を出すものとすれば、無信号検出回路6が
テープの無信号部分を検出してから停止信号が
出るまでの時間は次のように計算される。
Counter 9 is reel rotation sensor 7A or 7
If the stop signal output circuit 10 issues a stop signal to the mechanism control circuit 12 when five pulses from B are counted, the stop signal is output after the no-signal detection circuit 6 detects a no-signal portion of the tape. The time to exit is calculated as follows.

カウント開始時にcの波形が立ち上つた時: T5MIN=T1+(5−1)T4=188msec カウント開始時にcの波形が立ち上り直後の
時: T5MAX=T1+5T4=225msec T5のT0に対する割合は、 T5MINのとき、 188/333×100%≒56.5% T5MAXのとき、 225/333×100%≒67.6% である。
When the waveform of c rises when counting starts: T 5MIN = T 1 + (5-1) T 4 = 188 msec When the waveform of c rises immediately after starting counting: T 5MAX = T 1 +5T 4 = 225 msec T 5 The ratio of T to T0 is: 188/333×100%≒56.5% when T5MIN , 225/333×100%≒67.6% when T5MAX .

(b) テープの巻き終りにおいては、テープは第4
図に示す状態にあり、テープ速度は通常の再生
速度の35倍程度である。このときには次のよう
になる。
(b) At the end of the tape, the tape is
In the state shown in the figure, the tape speed is about 35 times the normal playback speed. In this case, it becomes as follows.

T0=5000msec/35=143msec 無信号部分のテープ長さ237.5mmであるから、 リールの回転数=237.5mm/20mm×π=3.78 対応するパルス数=3.78×6=22.7 対応するパルスの周期T′4=143msec/22.7 =6.3msec T′5MIN=T1+(5−1)T′4=65.2msec T′5MAX=T1+5T′4=71.5msec T′5のT0に対する割合は、したがつて、 T′5MINのとき、 65.2/143×100=45.6% T′5MAXのとき、 71.5/143×100=50.0% である。 T 0 = 5000msec / 35 = 143msec Since the length of the tape in the no-signal part is 237.5mm, the number of rotations of the reel = 237.5mm / 20mm x π = 3.78 The number of corresponding pulses = 3.78 x 6 = 22.7 The period of the corresponding pulse T ' 4 = 143msec/22.7 = 6.3msec T' 5MIN = T 1 + (5-1)T' 4 = 65.2msec T' 5MAX = T 1 + 5T' 4 = 71.5msec The ratio of T' 5 to T 0 is Therefore, when T′ 5MIN , 65.2/143×100=45.6% When T′ 5MAX , 71.5/143×100=50.0%.

上述の(a)、(b)を比較して明らかなように、テー
プの無信号部分の先端が検出されてから、パルス
を計数し始めるまでの時間T1を例えば40msec、
テープ駆動停止までのパルス数を5(T3)とする
と、無信号部分の期間の長さT0に対する停止信
号が出るまでの時間T5の割合 T5MIN/T0、T5MAX/T0〜T′5MIN/T0、T′5MAX/T0は56
.5%、 67.6%〜45.6%、50%でテープの巻き始めと、巻
き終りとで約11〜18%程度でしか変動せず、充分
安定に頭出し検出が行われる。
As is clear from comparing (a) and (b) above, the time T 1 from when the leading edge of the no-signal part of the tape is detected until the start of counting pulses is set to 40 msec, for example.
Assuming that the number of pulses until the tape drive stops is 5 (T 3 ), the ratio of the time T 5 until the stop signal is output to the length of the no-signal period T 0 is T 5MIN /T 0 , T 5MAX /T 0 ~ T′ 5MIN /T 0 , T′ 5MAX /T 0 is 56
At .5%, 67.6% to 45.6%, and 50%, the variation between the start and end of tape winding is only about 11 to 18%, and cue detection is performed with sufficient stability.

本発明による速送り時のテープの頭出し方法に
よれば、テープの速送りを開始すると、再生ヘツ
ド1で音を拾い、その信号を前置増幅器2および
バツフア増幅器5で必要なレベルまで増幅し、無
信号検出回路6で無信号部分が検出される。この
時、T1の空走部分を前述したように所定な適正
な時間だけあける。このT1の時間が無信号部分
において、テープ巻き始めと巻き終りとのテープ
走行速度の違いに応じたカウンタ9による計数パ
ルスの数の違いに補正をかける働きをする。それ
と併行して、リール回転センサ7A,7Bおよび
センサ選択回路8を通して、テープが巻き取られ
ている方のリールからパルスを検出し、カウンタ
9で一定数カウントし、タミング・パルスを出力
し、停止信号出力回路10を通してテープを停止
させる。
According to the method of finding the beginning of a tape during fast forwarding according to the present invention, when fast forwarding of the tape starts, the playback head 1 picks up the sound, and the preamplifier 2 and buffer amplifier 5 amplify the signal to the required level. , the no-signal portion is detected by the no-signal detection circuit 6. At this time, the idle running portion of T1 is left open for a predetermined appropriate time as described above. This time period T1 serves to correct the difference in the number of pulses counted by the counter 9 in accordance with the difference in tape running speed between the beginning and the end of tape winding in the no-signal portion. At the same time, a pulse is detected from the reel on which the tape is being wound through the reel rotation sensors 7A, 7B and the sensor selection circuit 8, the counter 9 counts a certain number of times, outputs a timing pulse, and stops. The tape is stopped through the signal output circuit 10.

本発明が、音声トラツクを利用したビデオテー
プの頭出しにも利用できることは明らかである。
It is clear that the present invention can also be used to cue a videotape using an audio track.

以上説明した通り、本発明によれば、テープ巻
き始めと巻き終りとで生ずるテープ速度の違いに
よつて生ずる頭出しの不安定を解消して、常に安
定して頭出し検出ができるという利点が得られ
る。
As explained above, the present invention has the advantage that the instability of cueing caused by the difference in tape speed between the beginning and the end of tape winding can be eliminated, and the cueing can always be detected stably. can get.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明による速送り時のテープ頭出し
方法を実施するための装置の構成を示すブロツク
図、第2図は第1図に示す装置においていろいろ
な位置における信号のタイミング・チヤート、第
3図および第4図はそれぞれテープ巻き始めおよ
びテープ巻き終りにおけるテープの状態を示す平
面図である。 1……再生ヘツド、2……前置増幅器、3……
主増幅器、4……スピーカ、5……バツフア増幅
器、6……無信号検出回路、7Aおよび7B……
リール回転センサ、8……巻き取つている方のリ
ールを選択するセンサ選択回路、9……カウン
タ、10……停止信号出力回路、11……操作
部、12……メカニズム制御回路、13……リー
ルを回転させるモータ、a……音声、b……無信
号検出信号、c……リール回転信号、d……カウ
ンタ出力、e……停止命令。
FIG. 1 is a block diagram showing the configuration of an apparatus for carrying out the method of finding the beginning of a tape during fast forwarding according to the present invention, and FIG. 2 is a timing chart of signals at various positions in the apparatus shown in FIG. 3 and 4 are plan views showing the state of the tape at the beginning and end of tape winding, respectively. 1... Reproduction head, 2... Preamplifier, 3...
Main amplifier, 4...Speaker, 5...Buffer amplifier, 6...No signal detection circuit, 7A and 7B...
Reel rotation sensor, 8...Sensor selection circuit for selecting the reel being wound, 9...Counter, 10...Stop signal output circuit, 11...Operation unit, 12...Mechanism control circuit, 13... Motor for rotating the reels, a...Audio, b...No signal detection signal, c...Reel rotation signal, d...Counter output, e...Stop command.

Claims (1)

【特許請求の範囲】[Claims] 1 リール回転センサを設け、テープの無信号部
分の先端が検出されてから、一定の時間だけ後の
時刻から巻き取られている方のリールの回転セン
サからのパルスを計数し始め一定数のパルスが計
数された時テープの駆動を停止することを特徴と
する速送り時のテープの頭出し方法。
1. A reel rotation sensor is installed, and the pulses from the rotation sensor of the reel being wound are started counting from a certain time after the tip of the non-signal part of the tape is detected, and a certain number of pulses are counted. A method for finding the beginning of a tape during fast forwarding, characterized in that the drive of the tape is stopped when is counted.
JP57175202A 1982-10-05 1982-10-05 Program searching method of tape in case of rapid traverse Granted JPS5965956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57175202A JPS5965956A (en) 1982-10-05 1982-10-05 Program searching method of tape in case of rapid traverse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57175202A JPS5965956A (en) 1982-10-05 1982-10-05 Program searching method of tape in case of rapid traverse

Publications (2)

Publication Number Publication Date
JPS5965956A JPS5965956A (en) 1984-04-14
JPH0472299B2 true JPH0472299B2 (en) 1992-11-17

Family

ID=15992074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57175202A Granted JPS5965956A (en) 1982-10-05 1982-10-05 Program searching method of tape in case of rapid traverse

Country Status (1)

Country Link
JP (1) JPS5965956A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2556144B2 (en) * 1989-09-08 1996-11-20 ヤマハ株式会社 Selection device for selecting music for tape recorders

Also Published As

Publication number Publication date
JPS5965956A (en) 1984-04-14

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