JPH0589642A - Recording method of video tape recorder - Google Patents

Abstract

PURPOSE:To record and store information related to a tape on the tape of a video tape recorder according to a helical scanning system without shortening the time of a video recording operation. CONSTITUTION:Information related to a tape 1 is recorded in unused parts 11, 12 where an image and a sound at the tape end of the tape are not recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of recording information relating to a tape of a helical scan type video tape recorder.

[0002]

2. Description of the Related Art Conventionally, for example, a VHS format helical scan type video tape recorder (hereinafter referred to as VHS
In the VTR of the method, the title name of the tape, the comment of the recorded contents, etc. are managed by attaching a label to the tape cassette or visualizing and recording it on the tape. Some VHSs of this type VHS system are provided with a program editing function using a linear counter in order to perform various types of editing such as edit recording.

In this case, the VTR or the VTR according to the count value of the linear counter directly connected to the tape control signal based on the contents of the programmed editing.
The operations of the TR and other external devices such as the VTR are controlled, and desired editing is performed.

[0004]

In the case of the conventional VHS type VTR, when a label is used to manage the title name, comments, etc. of the tape, complicated work such as writing and sticking the label is required. There is a problem that label peeling and contamination occur. Further, when recording and managing titles, comments, etc. on a tape, since the effective recording portion of the tape is used, there is a problem that the recording time of the tape is shortened.

On the other hand, in the case of a conventional VTR having a program editing function, if the tape is taken out after the editing is started, the linear counter is automatically reset to 0 to prevent erroneous editing, and the memory of the VTR is deleted. The editing program contents stored in will also be erased. Therefore, for example, when repeating editing recording of the same tape,
It is extremely inconvenient because it is necessary to recreate the editing program each time. The same problem as described above also occurs in a helical scan type VTR other than the VHS type.

According to the present invention, tape-related information such as the title name of a tape, a comment of recorded contents, and a program for editing a program is stored on the tape itself without reducing the recording time or the like, and each of the above problems is solved. The purpose is to eliminate it.

[0007]

In order to achieve the above object, in the recording method of the video tape recorder of the present invention, the video and audio at the tape end are not recorded in the helical scan type video tape recorder. The tape-related information is recorded on the part.

[0008]

In the recording method of the video tape recorder of the present invention configured as described above, the tape title, the comment of the recorded content or the editing program of the tape content is recorded in the unused portion where the video and audio of the tape end are not recorded. Since information is recorded, without shortening the tape recording time,
Information about the tape is recorded on the tape itself without labeling or recording.

[0009]

EXAMPLES Examples will be described with reference to FIGS. 1 to 9. (First Embodiment) First, a first embodiment of recording / reproducing information using an existing full width erasing head will be described with reference to FIGS. Figure 2 shows the VHS VT
FIG. 3 is a schematic view of the head arrangement of R, and during normal traveling such as normal recording and reproduction, the tape 1 pulled out from the supply reel of the tape cassette has the full-width erasing head 2, guide posts 3, 4, on the supply side. The head cylinder 5, the guide posts 6 and 7 on the take-up side, the audio erasing head 8, the control audio head 9, the pinch roller 10, and the capstan 11 are taken up by the take-up reel.

Then, the tape 1 is helically scanned by the pair of rotating video heads 12 of the cylinder 5 separated by 180 ° to record (record) and reproduce the video track. Further, the head 9 records and reproduces the audio track and the control track of the tape 1.

Further, the erasing of the video track of the tape 1 is performed by the full-width erasing head 2 or the rotating erasing head (not shown), and the erasing of the audio track at the time of after-recording is performed by the head 8.
Done by. The full width erasing head 2 is provided for collectively erasing all the tracks of the tape 1 at the time of recording, but in a VTR in which the rotary erasing head is provided in the cylinder 5, the head 2 improves the erasing rate and stabilizes running. ..

By the way, even if the tape 1 runs to the tape end, as shown in FIG. 1, the portion 11 between the full width erasing head 2 of the tape 1 and the cylinder 5 (hereinafter referred to as the first unused portion) is the head. Since it does not come into contact with 12, it is not used for video recording and reproduction. Also, a portion between the full-width erasing head 2 and the head 9 of the tape 1 (hereinafter referred to as a second unused portion) 12 (l2> l1) does not contact the head 9, and recording of voice and control signals, Not used for playback.

In this embodiment, the full-width erasing head 2 is used for the unused portion l1 to perform digital recording and reproduction of information related to the tape 1 such as a title name, a recorded content comment or an editing program. As shown in FIG. 3, in the circuit portion of the full-width erasing head 2, an information recording processing circuit 14, a recording output amplifier 15, an information reproduction processing circuit 16, a reproduction input amplifier 17, and a connection switching circuit are provided together with a full-width erasing circuit 13 similar to the conventional one. Switches 18, 19 and 20 are provided.

The switch 18 is turned on except when recording or reproducing information, and when the switch 18 is turned on, the full-width erasing circuit 13 is connected to the full-width erasing head 2 to perform full-width erasing at the time of recording as in the conventional case. Further, the switches 19 and 20 are turned on only at the time of recording and reproducing the information, respectively, and when the switch 19 is turned on, the full width erasing head 2 is provided with the recording amplifier 15,
When the processing circuit 14 is connected and the switch 20 is turned on, the reproducing amplifier 17 and the processing circuit 16 are connected to the full width erasing head 2.

Recording and reproduction of information executed by computer control of the system controller in the VTR will be described next. For example, in the case of recording an editing program, after the cassette of the tape 1 is set in the VTR, the editing start button of the operation unit (not shown) is pressed, and this operation causes the VTR to enter the program recording mode, and the processing of FIG. Is executed.

First, by manual assemble editing, for example, the count values of the linear counters at the beginning and end of each recording section are determined and written in the memory of the VTR.
Program editing is programmed. Next,
When the program recording button on the operation unit is pressed to notify the end of editing, fast-forwarding is executed and the tape 1 is fast-forwarded to the tape end.

When the tape end is reached by this fast-forwarding, the program of the memory is recorded on the tape 1, and therefore the rewinding is started. By the way, in order to establish an absolute position reference, when the tape end (folding point) is reached,
The count value of the linear counter is reset to 0 (absolute reference value), and each count value in the program of the memory is corrected to a value where the tape end is 0.

That is, when the count value of the linear counter reaches, for example, 2 hours at the tape end, each count value in the program is corrected to a negative value such as -1 hour, which is obtained by subtracting 2 hours from the count value.

When rewinding starts, the switch 18
Is turned off and the switch 19 is turned on as shown in FIG. 5 (a), and at the same time, the corrected program of the memory is read from the end and transferred to the creating circuit 14, which circuit (b) of FIG. ), A baseband digital signal for recording information is created, and this signal is generated by the amplifier 1
5, it is supplied as a recording current to the full width erasing head 2 via the switch 19. In order to increase the recording capacity of the tape 1, the tape running speed for rewinding in this mode is EP.
It is set to the speed of the mode (triple mode) or lower.

Then, the tape 1 is moved by the full-width erasing head 2.
Unused part l1 that is not used for recording video and audio
A memory program (hereinafter referred to as an editing program)
Is recorded in reverse order from the end. Since the editing program has a relatively small capacity of about 100 bytes and the tape running speed is slow, the recording length of the program is within the video non-use portion l1.

When the editing program is recorded to the beginning, the tape 1 stops running and the program recording mode ends.

When the program recording mode ends, the switch 19 is turned off and the switch 18 is turned on.

Next, when the recorded editing program is reproduced, after the cassette of the tape 1 is set, the program search button of the operation unit is pressed, and this operation causes the VTR to enter the program reproduction mode, and the processing of FIG. Is executed. Then, at first, fast-forwarding is executed and the tape 1 travels to the tape end, and when it reaches the tape end, the count value of the linear counter is reset to 0 and the rewinding is started.

Further, when rewinding is started, the switch 18
Is turned off and the switch 20 is turned on, and the tape traveling speed is set to the same speed as the rewinding in the program recording mode. Then, the full-width erasing head 2 reversely reproduces the recorded program of the unused portion 11 from the end, and the reproduction signal of the head 2 is supplied to the processing circuit 16 via the switch 20 and the amplifier 17.

When this supply is completed and the editing program is reproduced to the beginning, the tape 1 stops running and the program reproduction mode ends. Note that the switch 20 is turned off and the switch 18 is turned on by the end of the program reproduction mode.

Further, the processing circuit 16 reconstructs the editing program from the reproduced signal. Then, the editing program of the processing circuit 16 is transferred to, for example, the memory of the VTR, and editing recording can be performed without editing programming.

By the way, in order to record and reproduce various information relating to the tape, not only the above-mentioned edit start button and program search button for the editing program but also the title name, comments of recorded contents, etc. are provided on the operation unit. An information recording command button and an information recording command button are provided. By pressing these buttons, preset optimum recording and reproducing control of each information is executed, and each information is recorded using the full width erasing head 2. It is recorded and reproduced on the unused portion 11 of the tape.

That is, in the case of recording and reproducing the title name, for example, a digital signal of the title name is recorded by a process that omits the assemble edit and the correction of the count value from the process of FIG. 4, and the same process as the process of FIG. The digital signal recorded by is reproduced. During reproduction of the title name, comment, etc., the digital signal reconstructed by the processing circuit 16 is converted into, for example, a display signal and supplied to a display device such as a television receiver, and the title name, comment, etc. are displayed on this display device. Etc. are displayed on the screen.

Therefore, with the simple and inexpensive structure using the existing full width erasing head 2, the information related to the tape is recorded / reproduced in the unused portion l1 which is not used for recording / reproducing the image and sound of the tape. .. It is also possible to record a plurality of pieces of information in the unused portion 11 and selectively reproduce each piece of information.

Further, based on the information on the date of the VTR and the information on the recording time such as the timer counter, the recording of the information is automatically executed every time the normal video and audio are recorded, and the date and the recording time are recorded. It is also possible to automatically record the unused portion l1.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In this embodiment, the video track of the unused portion l1 and the audio track and control track of the unused portion l2 of FIG. 1 are used for recording and reproducing information related to the tape so that recording and reproducing can be performed in track units. In order to increase the information recording capacity, a track division type full width head 21 shown in FIGS. 7 and 8 is provided at the position of the head 2 in place of the conventional full width erasing head 2 of FIG.

The full-width head 21 is provided with a video track head portion 21a for recording / reproducing information of a video track at the center of the tape contact surface, and above and below it for recording / reproducing information of an audio track. An audio track head portion 21b and a control track head portion 21c for recording / reproducing and erasing information of a control track are provided.

Further, the circuit section shown in FIG. 7 is provided in place of the circuit section of FIG. 3, and this circuit section is different from the case of FIG.
Along with the full width erasing circuit 14, an information recording processing circuit 22 having three circuit configurations for each track, recording output amplifiers 23a and 23b,
23c, an information reproduction processing circuit 24 having a three-circuit configuration, reproduction input amplifiers 25a, 25b, 25c, and switches 26a, 26b, 26c for selecting tracks.

The recording processing circuit 22 includes amplifiers 23a ...
23c is connected to each of the head portions 21a to 21c,
The reproduction processing circuit 24 is connected to the head units 21a to 21c via amplifiers 25a to 25c. Also, the erase circuit 1
Reference numeral 4 denotes each head portion 21a via the switches 26a to 26c.
21c, the switch 26a is independently switched by the control signal S1, and the switches 26b and 26c are interlocked by the control signal S2.

When recording information such as a title, a comment, or an editing program, the information recording command button such as the editing start button of the operation unit is pressed, and the VTR is in the program recording mode, as in the first embodiment. The mode shifts to the information recording mode. The computer control of the system controller in the VTR based on this transition executes the process corresponding to FIG.

When the processing circuit 22 forms one or more kinds of digital signals for recording information and the tape 1 is fast forwarded to the tape end and rewinding is started, the control signals S1 and S2 are changed to those shown in FIG. At the same time, as shown in (a) and (b), it is inverted from the on level to the off level, and by this inversion, the switches 26a to 26c are all turned off and the erase circuit 1
4 is separated from the head 21.

Then, while the tape 1 is rewound from the tape end at the EP mode speed or lower, and the switch 26a is turned off and the unused portion 11 of FIG. Since all audio tracks and control tracks can be recorded,
For example, a digital signal is supplied in parallel as a recording signal from the processing circuit 22 to the heads 21a to 21c via the amplifiers 23a to 23c, and the divided reverse recording or the parallel reverse recording of the tape-related information is performed on each track. further,
When it is rewound to the beginning of the unused portion l1, the switch 26
a reverses to on and recording of the video track stops, but
The switches 26b and 26c are held off, and recording of the audio track and control track is continued.

When the unused portion 12 is rewound to the starting end, the switches 26b and 26c are turned on and recording of the audio track and control track is stopped, and the recording of information is completed. Since the video track of the unused portion l1, the audio track of the unused portion l2, and the control track are independently used for recording information, the information recording capacity is dramatically increased from l1 of the first embodiment to l1 + 2 · l2. More.

When recording the editing program,
When the tape end is reached and rewinding is started, the linear counter is reset to 0 and each count value in the editing program of the memory of the VTR is corrected, as in the case of the first embodiment. By the way, the video track of the unused portion l1, the audio track of the unused portion l2, and the control track can be used in order to record information, and the information can be recorded repeatedly.

Next, when reproducing the information recorded on the tape 1, as in the first embodiment, the information reproducing command button such as the search start button of the operation unit is pressed and the VTR is set to the program reproducing mode or the like. Move to information playback mode. The computer control of the system controller in the VTR based on this transition executes the process corresponding to FIG.

When the tape 1 is fast forwarded to the tape end and rewinding is started, the control signals S1 and S2 are inverted to the off level at the same time as in the recording, and the erasing circuit 1
4 is separated from the head 21.

Further, while the tape 1 is running at the same speed as during recording, the switch 26a is off and the unused portion 11 is in contact with the head 21, the information of each track is reproduced by the head portions 21a to 21c. When the start of the unused portion 11 is reached and the switch 26a is turned on and reversed, the head portion 2
Information of the audio track and the control track is reproduced by 1b and 21c.

When the unused portion 12 is rewound to the start end, the switches 26b and 26c are turned on and the reproduction of information is completed. The reproduction signal of the information of each track is reconstructed by the processing circuit 24 into information such as a title, a comment or an editing program.

Further, during normal recording, the switches 26a-2
6c is turned on, and the erasing current of the erasing circuit 14 is applied to the head portion 21.
a to 21c, and full width erasing similar to that of the conventional full width erasing head 2 is performed.

By the way, it is also possible to reproduce only the selected information by providing an information or track selection button on the operation unit, for example. Also, a plurality of information may be recorded and reproduced on each track.

Further, the full-width head 21 is provided in the vicinity of the existing full-width erasing head 2, and the full-width head 21 records information.
It may be dedicated for reproduction. In both of the above embodiments, V
Although it is applied to the HS type VTR and the information related to the tape is recorded and reproduced in the unused portions 11 and 12 of the tape end based on the position of the full width erasing head 2, it can be applied to various helical scan type VTRs. Of course.

At this time, if the full-width erase head is not provided, a full-width head similar to the full-width erase head 2 or the full-width head 21 is provided at the reference position of the unused portions corresponding to the unused portions l1 and l2. Good.

[0048]

Since the present invention is configured as described above, it has the following effects. Unused part 1 where the video and audio at the tape end of tape 1 are not recorded
Since information related to the tape 1 such as a title, a comment of recorded contents, or a program for editing a program is recorded in 1, 12 in a simpler and more reliable method than, for example, when a label is attached or information is recorded, It is possible to manage the information without shortening the recording time of the tape 1 and to store the editing program such as the editing recording using the linear counter on the tape itself for effective use. A recording method for a high-value video tape recorder can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an unused portion of a first embodiment of a recording method of a video tape recorder of the present invention.

FIG. 2 is an explanatory diagram of a head arrangement of FIG.

3 is a circuit block diagram of the full width erase head of FIG. 1. FIG.

FIG. 4 is a flow chart for explaining the information recording of FIG.

5A and 5B are timing charts for explaining the operation of FIG.

FIG. 6 is a flowchart for explaining information reproduction of FIG.

FIG. 7 is a circuit block diagram of a main part of a second embodiment of the present invention.

8 is a front view of the full width head of FIG. 7. FIG.

9A and 9B are timing charts for explaining the operation of FIG.

[Explanation of symbols]

 1 tape l1, l2 unused part

Claims (1)

[Claims] 1. A recording method for a video tape recorder, characterized in that, in a helical scan type video tape recorder, information relating to a tape is recorded in an unused portion where video and audio at a tape end are not recorded.