JP2710051B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic recording / reproducing apparatus such as a VTR (Video Cassette Tape Recorder).

(Prior art) Conventionally, for example, in a VTR, a control pulse recorded on a control track of a magnetic tape (hereinafter, simply referred to as a tape) is read by an internal A / C head and counted to retrieve recorded information. In some cases, a cue signal, an address code, and the like are recorded on a control track for use for the same purpose.

In addition, digital processing is performed on the playback signal,
There are those that perform various types of image processing by storing them in a semiconductor memory inside, for example, a VTR that records a cue signal
In the above, the video at the recording location of the cue signal is reproduced by running the tape all the way from the beginning to the end, and the reproduced video is recorded in the semiconductor memory. Digital processing that stores the image in a memory and displays the image on a display screen that can display one screen divided into a plurality of screens, and inserts and displays the video of the part where the cue signal was recorded on the divided screen Has appeared.

(Problems to be Solved by the Invention) However, it has excellent functions as in the prior art.
Even with a VTR, the video at the location where the cue signal was recorded cannot be confirmed unless the tape is run all the way from the beginning to the end.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic recording / reproducing apparatus which eliminates the above-mentioned conventional disadvantages and makes it easy to confirm a video at a recording position of a cue signal without running the tape all over.

(Means for Solving the Problems) The present invention provides the above-described object in a magnetic recording and reproducing apparatus,
Main signal recording / reproducing means for recording / reproducing a main signal on a magnetic tape, sub-recording / reproducing means for recording / reproducing a cue signal, and storage means for storing a main signal when the sub-recording / reproducing means records a cue signal And comparing the main signal when the cue signal (including the address code etc., the same applies hereinafter) is reproduced by the auxiliary recording / reproducing means with a plurality of main signals of the cassette already stored in the storage means. And identification means for identifying the corresponding cassette.

(Operation) According to the present invention configured as described above, the main signal stored in the storage unit (including other storage units that operate in a linked manner, the same applies hereinafter) and the main signal at the position where the cue signal of the cassette is recorded are stored. The corresponding cassette can be identified by comparison, and when a cue signal is recorded in the cassette, the main signal of the cue signal portion is stored.
Since the cassette in which the cue signal is recorded is stored in a database, the search for the cassette is quick.

(Examples) Hereinafter, the present invention will be described in detail with reference to the drawings using examples.

FIG. 1 is a plan view of an apparatus showing an embodiment in which the present invention is applied to a VTR, showing a mechanism section 2 of a VTR main body 1 (hereinafter, referred to as main body 1), 3 is a tape, and 4 is a main signal recording. The tape 3 is pressed against the rotary head cylinder 4 and the pinch roller 5 and is driven to run at a constant speed by the capstan motor 6.
A take-up reel 7 for the tape 3 is provided on the downstream side, and a supply reel 8 for the tape 3 is provided on the upstream side of the capstan motor 6.
Further, there are loading means 9 for winding the tape 3 around the rotary head cylinder 4 by a predetermined angle, and a subhead 10 for recording, reading or erasing a cue signal, an address code and the like on a part of the tape 3.

FIG. 2 is a block diagram showing the main components of an embodiment of the present invention. The VTR includes a video storage means 11, a video signal quantization circuit 12 for storing the video data, and a digital signal. An identification circuit 13 for identifying the cassette by comparing the converted video signal with the video signals of a plurality of cassettes already stored in the storage means 11;
A control circuit 14 for controlling the basic operation as R, and for recording a cue signal (or address code, hereinafter the same) on the front panel of the main body 1 as shown in the front view in FIG. It has a cue signal recording button 15, a function operation button 16 for operating a VTR function such as recording, reproduction, fast forward, rewind, search or stop, and a display section 17 for displaying a cassette number identified by the identification circuit 13. ing.

The present invention configured as described above operates as follows depending on the cassette to be used.

(1) In the case of a tape on which no video signal is recorded First, when a cassette is inserted into the main body 1, the cassette is moved and mounted at a predetermined position, and when the recording or reproduction button of the function operation button 16 is selected and operated (hereinafter, the recording button The loading means 9 draws the tape 3 from the cassette herb, winds the tape 3 around the rotary head cylinder 4 by a predetermined angle, and contacts the sub head 10 with the tape running system as shown in FIG. Form.

Thereafter, when recording of an image is started by the rotary head cylinder 4, recording of a cue signal is first performed by the sub-head 10, and at the same time, the image signal at that time is
And is stored in the storage unit 11.

In this way, the reproduction or recording operation is started, and if necessary, the cue signal recording button 15 is pressed, and the cue signal is recorded on the tape 3 by the sub head 10, and the video signal at that time is quantized and stored in the storage means 11. Digitally stored.

Thereafter, the cue signal is recorded by the same repetition, and the video signal corresponding to the cue signal is stored in the storage means 11 as data of the same tape under the control of the control circuit 14.

When a stop (or a pause operation, the same applies hereinafter) operation is performed by the function operation button 16, the control circuit 14 causes the cue signal to be recorded on the tape 3 by the subhead 10 and the video signal at that time is quantized. Tape 3
Is stopped, and the quantized output is stored in the storage means 11. Note that the above storage is not stored as a video signal of the cassette once the cassette is ejected from the main body 1.

(2) When a video has already been recorded on the tape When a cassette is mounted and the function operation button 15 is operated to search, the loading means 9 is controlled by the control circuit 14.
Pulls out the tape 3 from the cassette herb to form the tape running system shown in FIG. Thereafter, the tape 3 is moved to the mounting position and the presence / absence of the recording of the cue signal of the cassette is detected.

(A) If no record is detected at the mounting position by the above search, a cue signal is output on the tape 3 to indicate the mounting position.
Then, the sub head 10 is rewound to the position where the cue signal is read.

(B) If the cue signal is detected, the control circuit 14
First, the running of the tape 3 is stopped at the position where the cueing signal is read by the sub head 10, and then the loading means 9 is attached to the rotary head cylinder 4 by the tape 3 as shown in FIG.
Is wound by a predetermined angle to run at a constant speed, the recorded video signal is reproduced by the rotary head cylinder 4, and the reproduced video is stored in the digital signal quantized by the quantization circuit 12 and stored in the storage means 11. The discrimination circuit 13 compares the quantized video signals of a plurality of cassettes already stored with the discrimination circuit 13 to search for and identify the corresponding cassette.

Thereafter, as long as the cassette is not ejected, when the cue signal is recorded, if there is a corresponding cassette, the video signal is used as the corresponding cassette, and if there is no corresponding cassette, the video signal is used as a new cassette. The storage method of the storage means 11 is determined so that is stored. Then, the main body 1 is fast-forwarded to the position where the cue signal was first recorded after the cassette was inserted, and the first cue signal recorded after the cassette was mounted is erased and stopped.

(3) When no cue signal is detected after rewinding The control circuit 14 stops the rewinding operation for search and shifts to the fast-forward operation, and then the first cueing signal after the cassette is mounted. When the recording of another cue signal is searched in addition to the recording of the cue, in other words, when the second cue signal is detected after the fast forward state, the tape 3 is moved to the rotary head cylinder 4 as described above. After running at a constant speed after winding at a predetermined angle, the video signal at the recording position of the detected cue signal is reproduced, and the quantized video signal and a plurality of video signals already stored in the storage means 11 are reproduced. By comparing the video signal of the cassette with the video signal of the cassette by the identification circuit 13, the relevant cassette is searched and identified.

Then, as long as the cassette is not ejected once, a cue signal is recorded and if there is a relevant cassette, the video signal is used as the relevant cassette, and if there is no relevant cassette, the video signal is used as a new cassette. The storage method of the storage means 11 is determined so as to store. Then, the main body 1 fast-forwards to a position where the cue signal is first recorded after the cassette is inserted, and erases and stops the first cue signal recording after the cassette is mounted.

Also, as a result of discriminating the video signal at the time when the cue signal was reproduced from the video signal of the cassette already stored, if there are a plurality of corresponding cassettes, the control circuit 14 Rewinds or fast-forwards the tape 3 to search for a cue signal having a video signal different from the video signal for the cue signal reproduced earlier, and finds the corresponding video signal and a plurality of previously identified cue signals. By comparing the cassette with another video signal, the corresponding cassette is identified. As a result, if there are still a plurality of such cassettes, the above comparison is repeated to ensure identification. The control circuit 14 identifies the relevant cassette and, when the cue signal is recorded, unless the cassette is ejected from the main body 1, stores the video signal as the relevant cassette.
Is controlled to be stored.

(4) Other than the cue signal recorded when the cassette was mounted,
When no cue signal is recorded After the search is completed by the fast-forward operation, the cue signal is rewound to the first cue signal recording position, the record is erased and stopped by the subhead 10, and then the cue signal is recorded. In this case, as long as the cassette is not ejected from the main body 1 as a new cassette, the control circuit 14 controls so that the video signal of the same cassette is stored in the storage means 11.

The corresponding cassette is identified as described above. When the cue signal is recorded using the cue signal recording button 15, it is recorded on the tape 3 by the sub head 10,
It is stored in the storage means 11 as a video signal of the relevant cassette.

Hereinafter, by repeating this, the cue signal is recorded, and the control circuit 14 controls so that the video signal is stored in the storage means 11 as data of the same tape in response thereto.

Here, when the stop operation is performed by the function operation button 16,
The control circuit 14 records the cue signal, reproduces the video signal at that time, stops the tape 3, and controls the storage means 11 to store the video signal. When the cassette is ejected, recording as a video signal of the cassette is stopped.

As described above, the cassettes in the database are numbered by the control circuit 14, and the video signals are stored in the storage means 11 according to the numbers, and the numbers are displayed on the display unit 17 provided on the front panel. Is done.

As described above, the present invention has been described in detail. However, the recording of the cue signal is not limited to the above example. For example, if a control head that records a control signal in a traveling system is provided, a control pulse recorded by the control head can be used. Instead of the regular width, change the width in a compatible range and record it, record the cue signal with the head on the rotating head cylinder, or superimpose on the recording area of the video signal and audio signal It is obvious that the signal may be recorded, and the video signal or the identification signal at the time of recording the cue signal may be an audio signal. Further, the recording method can use a fixed head, and the storage means can be an externally provided storage means that operates in a linked manner, or the storage means may be a memory such as a semiconductor, a magnetic or an optical element.

In the above embodiment, the cue signal recorded first after the cassette is mounted is erased. However, the cue signal may be stored as data of the cassette after the video signal at that time is identified by the identification circuit without being erased.

In addition, although the cue signal is recorded first after the cassette is mounted, the cue signal may be returned to the cassette mounting position.For example, in the case of recording a control signal, the number of control pulses may be counted and returned to the original position. In addition, a device is provided in which a person does not judge whether or not there is a record in a cassette and mounts it, but automatically judges whether or not a main signal is read by running a tape, or records a control signal. Alternatively, the determination may be made automatically based on whether the control head reads the control signal.

Lastly, the above description has been made with reference to the VTR as an example, but the present invention is not limited to this, and can be applied to DAT, data streamer, etc.
Further, the storage means may be a storage means operated in connection with the main body, or the cue signal may include an address code, and recording and reproduction may be performed by a timer.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the cassette is identified without causing the tape to run all the way as in the related art, and the image of the video signal of the storage device and the recording position of the cue signal of the cassette are recorded. When the cue signal is recorded on the cassette, the cue signal is stored as a video signal of the cassette, and the cassette on which the cue signal is recorded is stored in a database and stored. Since the cassette number is displayed, the cassette management becomes easy. In addition, since the cue signal is recorded when the cassette is ejected, the cassette can be identified in a short time without performing rewinding, fast-forwarding, etc., and the present invention can achieve a great effect.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the apparatus of the present invention, FIG. 2 is a block diagram of the same, FIG. 3 is a front view of the apparatus main body, and FIG. . DESCRIPTION OF SYMBOLS 1 ... VTR main body (abbreviated as a main body), 2 ... mechanical part, 3 ... magnetic tape (abbreviated as a tape), 4 ... rotary head cylinder (main signal recording / reproducing means), 5 ... pinch roller, 6 ... capstan motor, 7 ... take-up reel, 8 ... supply reel, 9 ... loading means, 10 ... sub head, 11 ... storage means, 12 ...
Quantization circuit, 13 identification circuit, 14 control circuit, 15 cue signal recording button, 16 function operation button, 17 display unit.

Claims (1)

(57) [Claims] In a magnetic recording / reproducing apparatus, a main signal recording / reproducing means for recording / reproducing a main signal on / from a magnetic tape; a sub-recording / reproducing means for recording / reproducing a cue signal; The storage means for storing the main signal at the time of recording and the main signal when the cue signal is reproduced by the sub-recording / reproducing means are compared with a plurality of main signals of the cassette already stored in the storage means. And a discriminating means for identifying a corresponding cassette.