JPS6352391A - Preparing device for index of magnetic recording and reproducing unit - Google Patents

Abstract

PURPOSE:To reproduce and confirm a part in which video information of index of a tape by providing a means that mixes field signals and counter output signals stored in a pair in a memory and records in a magnetic tape. CONSTITUTION:When it is desired to record a subject name as index information, a writing area of a field memory 12 is designated by an operating section 13. The operation signal is inputted to a controlling circuit 40, and the controlling circuit 40 switches a switch SW 1 to a terminal (b) side to write a monitor video signal in the field memory 12, and mixes present value of a tape counter 32 with the monitor video signal by a mixing circuit 31. Accordingly, a desired picture image and the tape counter value are supplied to an analog/digital converter 33, and written in the field memory 12 after reducing. Thus, picture image signals of a program to be recorded and tape position information of starting of the program are stored in the field memory 12. Stored content of the tape counter and picture image can be confirmed in the monitor picture by switching a switch SW 2 to the terminal (b) side.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention is an object of the present invention to detect what kind of contents are recorded on a video tape used in a magnetic recording/reproducing device. The present invention relates to a table of contents creation device that can record and rewrite data.

(Prior Art) In order for a user to recognize the contents recorded on a video tape, it is common practice to attach a label with a title written on it to the video cassette or cassette case.

(Problem to be Solved by the Invention) - Apart from video tapes that are stored for a long period of time, videos that are frequently updated with some programs or rewritten with other programs must have a label. This is inconvenient because it is necessary to rewrite the title to be entered and the tape counter value that indicates the position of the recorded content. Furthermore, when writing on a label, if the previous title is corrected and a new title is written, the space for the label may be insufficient or the label may become dirty.

Therefore, the present invention makes it possible to record the title of a program recorded on a videotape, or a part of the program, and the value of a tape counter indicating the position of the program on the tape as video information on the tape itself. In order to check the contents of a program recorded on a tape, it is desirable to provide a table of contents edge creation device for a magnetic recording/reproducing device that allows the user to play back and check the portion of the table of contents of the tape in which video information is recorded. purpose.

[Structure of the Invention (Means for Solving Problems)] The present invention provides means for recording a desired field signal of a video signal and a counter output signal of a magnetic recording/reproducing device in a memory as a pair; and means for mixing the field signal and the counter output signal stored in pairs and recording the mixture on a magnetic tape driven by the magnetic recording/reproducing device.

(Function) With the above means, for a program to be newly recorded on a videotape, one field or a plurality of fields of the characteristic scene or title part can be recorded in the memory. At this time, a counter value indicating the tape position of the program can also be recorded. Then, when the recording of the program is finished, the contents of the memory can be recorded at a predetermined position on the videotape, for example at the start part (table of contents part). When playing back this tape, the recorded contents can be recognized by monitoring the table of contents. In addition, by storing the contents of the table of contents in the memory at the start of playback and monitoring the contents of the memory when necessary, no matter where the tape is (during recording or playback), It is easy to recognize which program is being recorded.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a basic outline of an embodiment of the present invention. First, a video tape 1 on which nothing is recorded is shown.
In addition to recording programs PR1 and PR2゜PH1 on 1,
Explain how to create a table of contents. When the program PRI starts, the magnetic recording/reproducing device is put into a recording mode and recording starts.

At this time, the user starts the writing operation of the field memory 12 when the title part of the program PRI appears on the screen. At this time, the write address area of the field memory 12 is designated from the operation unit 13. In the illustrated example, the field memory 12 has four areas, but in reality, more areas are provided. As a result, the specified scene of the program PRI is written into the designated area of the field memory 12. Since this scene is a signal for one field, when it is written into the field memory 12, The screen reduction processing circuit 14 reduces the size to, for example, 1/4 and writes the image. Furthermore, the value of the tape counter at this time is also written in pairs as numerical data. When the program PRI ends and the program PR2 is recorded next, or when the program PR2 ends and the program PR3 is recorded, the user inputs the desired scene and the value of the tape counter at that time in the field. It is possible to write to a desired area of the memory 12. Also, coloring data is written into an unused portion of the field memory 12.

When the recording of programs PRI to PR3 is finished and the recording tape is rewound, the contents of the field memory 12 are then recorded in, for example, a number field (shaded area in the figure) at the beginning of this tape 11, and a table of contents is created. is completed.

If you play a tape with a table of contents as above next time,
This table of contents portion is reproduced, and the user can view it on the screen of the monitor 15 and easily recognize what kind of contents have been recorded. During this playback,
For example, a specific code indicating table of contents information is recorded in the table of contents section of the tape, and the contents of this table of contents section are automatically written into the field memory 12.

If the user wishes to watch the program PR2 now, he can recognize the recording position from the tape counter value on the monitor 15. Therefore, the user can easily search for program PR2 by feeding the tape to a desired tape position by high-speed feeding.

Next, consider a case where, for example, while watching this program PR2, the user wants to watch another program, for example, program PRI. At this time, the user can perform an operation to display the contents of the field memory 12 via the operation section 16. This allows the user to view the table of contents regardless of the tape position. If you want to watch the program PRI, set the magnetic recording/reproducing device to high-speed rewind mode and watch the program PRI.
The tape can be fed to the tape counter position.

FIG. 2 shows a specific circuit configuration for writing table of contents information into field memory 12, recording table of contents information from field memory 12 on tape, and displaying table of contents information from field memory 12 on a monitor. It is.

The input terminal 21 is supplied with an input video signal from, for example, a tuner. In normal recording/playback mode, switches SWI, SW2. SW3 and SW4 select each terminal a. Therefore, the recorded video signal is transmitted to terminal 21.
The signal is supplied to the recording signal processing circuit via the switch SW4° terminal 22 and recorded on the tape. A monitor video signal or a playback video signal is input to the terminal 23, and the switch SW2. It appears at the terminal 24 via SW3 and is supplied to the monitor.

■The case where a program is currently being recorded or played back and you want to record its title as table of contents information will be explained. In this case, the writing area of the field memory 12 is specified using the operation unit 13. The operation signal is input to the control circuit 40, and the control circuit 4
0 switches the switch SW1 to the terminal side in order to write the monitor video signal into the field memory 12. Further, the current value of the tape counter 32 is mixed with the monitor video signal in the mixing circuit 31. Therefore, the desired screen image and tape counter value are supplied to the analog-to-digital converter 33 via the switch SWI, where they are subjected to reduction processing and written into the field memory 12. in this way,
The image signal of the program to be recorded and information on the tape position where this program starts are stored in the field memory 12.

Further, the tape counter contents and image contents being stored at this time can be checked on the monitor screen by switching the switch SW2 to the terminal side.

A case will be described in which table of contents information is stored in the field memory 12, and the information is recorded in the table of contents information portion of the tape, as shown in (2). In the second case, a table of contents recording command is issued from the operation unit. Alternatively, the table of contents recording command is automatically issued when the tape has finished rewinding. Then, the control circuit 40 switches the switch SW4 to the terminal side and performs data read processing from the field memory 12. Therefore, the output data of the field memory 12 is converted into an analog signal by the digital-to-analog converter 34, high-frequency noise is removed by the low-pass filter 35, and the switch SW4. It is guided to terminal 22.

(2) Next, a case will be described in which a videotape with table of contents information recorded as described above is played back. In this case, the control circuit 40 detects, for example, a specific code recorded together with the table of contents information and starts automatic writing of the table of contents information. The specific code may be generated by an operation from the operation unit.

At this time, the switch SW1 is switched to the terminal a side.

Therefore, the table of contents information recorded on the tape is temporarily stored in the field memory 12. However, at this time, since the table of contents information has already been reduced, writing processing is performed without performing reduction processing in analog-to-digital conversion S33. Also, at this time, since the table of contents information is already accompanied by a counter value, it is not passed through the mixing circuit 31.

Thus, for example, at the beginning of a tape, its table of contents information is written to the field memory 12. Also, the table of contents information at this time is switch SW2. Monitored via SW3. Therefore, the user can see the table of contents information and understand where on the tape the desired program is recorded.

■Next, we will explain what to do when you want to watch another program while the program on the tape is being played back. At this time, the user performs an operation to read the table of contents information. Then, only the switch SW3 is switched to the terminal side, and the reading process of the field memory 12 is started.

Therefore, the table of contents information is displayed on the monitor regardless of the current tape position.

■Next, the case where a new program is to be recorded on the tape "-2" will be explained. At this time, as before, the title section of the program and the tape counter value of the recording start section are written in the free area of the field memory 12.

(2) Next, a case will be described in which a certain program recorded on the tape is erased as described above and another program is recorded at this program position. In this case, the user can know the starting position of the program he or she wants to delete by looking at the table of contents information. Recording of a new program can then be started from that tape position. Furthermore, whether the title and counter value of the new program at this time are to be written to the field memory 12 as table of contents information, and the specified area is, for example, what number of program is it counted from the beginning of the tape. is specified from the operation unit 13. Therefore, part of the information in the field memory 12 can be rewritten without changing other information.

FIG. 3 shows another embodiment of the invention. The previous example is
When first creating a table of contents for a tape, the title signal of the program and the tape counter value were mixed and written into the field memory 12. However, in this embodiment, a memory 45 for writing the count value of the tape counter 32 is separately prepared.

In normal recording mode, the video signal for recording is sent to terminal 21. Switch SWI 1. The signal is supplied to a recording signal processing circuit via a terminal 22 and recorded on a videotape. Also, at this time, the video signal for the monitor is sent to the terminal 23. switch 5
It is led out to the terminal 24 via WIO.

(2) Assume that an operation has now been performed to record the title of the program and the counter value of the tape counter 32 as table of contents information. At this time, the control circuit 40 controls the switch 5W1.
2, 5W13 is terminal a side, switch 5WIO, 5W14
is switched to the terminal side. Also memory 45. Field memory 12 is placed in write mode. Therefore, the contents of tape counter 32 are written to memory 45, and the video signal (program title) at this time is written to field memory 12. Furthermore, the mixing circuit 46 mixes the video signal being written and the counter value, and the switch 5
It is led out to the terminal 24 via W14,5WIO. Therefore, the value of the tape counter during writing can be monitored.

■If you want to write the titles of multiple programs and the counter value indicating the start position of the programs and then record them as table of contents information on the tape as described in Section 2, switch 5W12,
5W13. '5W14. SW'll is switched to the terminal side. At this time, the recording video signal at the terminal 22 is returned as a playback (monitor) video signal at the terminal 23, so it is used to check the contents of the memory, 45, and field memory 12 during recording or playback to the switch SWI. Ru. The memory 45 and the field memory 12 are put into read mode, and their output signals are combined by a mixing circuit 46. Therefore, the monthly information recorded on the tape is a mixture of the video signal including the title and the tape counter value.

(2) When reproducing a tape recorded as described above, the field memory 12 is in a write mode for the table of contents portion.

This is initiated, for example, by inputting a specific code into the control U path 40, as in the previous embodiment. At this time,
The playback video signal is supplied to the monitor via the SWI O terminal 24, so the user can watch it on a rare occasion.
! It is possible to recognize the position of the tape-1- of the program.

■If you want to know the recording position of another program while watching a certain program, the table of contents information reading operation is performed. At this time, the data in the field memory 12 is already information including the title and the counter value, so the switch 5W14
is switched to terminal a, and switch SWIO is switched to terminal A. This allows the user to search the table of contents information temporarily stored in the field memory 12 on the monitor.

■When recording a new program on the above tape and adding table of contents information for the program, the title section of the program is written to the specified area of the field memory 12 as mentioned above, and The counter value is written to memory 45. Then, when the tape has finished rewinding, switch 5WII is pressed.

12.13.14. is switched to the terminal side, and memory 4
5. The field memory 12 is in read mode, its output signals are mixed in the mixing circuit 46, and the switch 14.
11 to a recording video output terminal 22 and recorded on tape. This makes it easy to create a table of contents for new programs.

[Effects of the Invention] As explained above, the present invention records the title of a program recorded on a videotape, or a part of the program, and the tape counter value indicating the position of the program on the tape, on the tape itself. A magnetic recording and reproducing device that can record the program as video information and confirm the contents of the program recorded on this tape by playing back the part where the video information is recorded in the table of contents of the tape. A table of contents border creation device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing nine basic concepts of the invention, FIG. 2 is a circuit diagram showing one embodiment of the invention, and FIG. 2 is a circuit diagram showing another embodiment of the invention. 12...Field memory, 13...Operation unit, 15
...Monitor, 31...Mixing circuit, 32...Tape counter, 33...Analog-digital converter, 34...
...Digital analog deer exchanger, 40...control four-way, S
W.I. SW2. SW3,5W4-. 7. Itch.

Claims (1)

[Claims] means for recording a desired field signal of a video signal and a counter output signal of a magnetic recording/reproducing device in a pair in a memory; and mixing the field signal and the counter output signal stored in the memory in a pair. A table-of-contents creation device for a magnetic recording/reproducing apparatus, comprising means for recording on a magnetic tape driven by the magnetic recording/reproducing process.