JPH02220579A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To record content information of a program without losing an original picture and to display the information on a TV screen at any time by recording a character data relating to the recording number to a prescribed location of a vertical fly-buck period in a form of the data. CONSTITUTION:A video signal 2 inputted from an input terminal 17 is inputted to a synchronizing gate generator 1 and a gate pulse 6 corresponding to the horizontal scanning period is generated for a prescribed period in the vertical fly-back period. On the other hand, a data relating to a recording program content is sent from a system controller 7 to a character data generating processing unit 8, and a character data 9 is generated. A video signal 2 is inputted to a synthesizer 10 and a video signal is replaced with the character data 9 only for a prescribed period among the vertical period with the gate pulse 6 and stored in a memory 11. On the other hand, a character signal 12 corresponding to the character data 9 is generated by a character generator 13 from the processing unit 8 and fed to an input video signal 2 by a monitor output synthesizer 14, outputted from a monitor output terminal 15 and character information is confirmed on a TV screen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing apparatus that simultaneously records content information of a recorded program along with a video signal.

[Conventional technology]

In conventional magnetic recording and reproducing devices, character information of a recorded program is recorded and displayed by being superimposed on a video signal. As this type of magnetic recording/reproducing device, for example,
Examples include those described in Publication No. 10.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, since the character signal is superimposed on the video signal and recorded, the only option is to superimpose the character signal in a limited area such as the beginning of the recorded video of a recorded program. There is also the problem that the original image is damaged in the area where one character is superimposed.

[Means to solve the problem]

The above object is achieved by converting a character signal, which is content information of a recorded program, into character data and recording it in a predetermined horizontal scanning period of a vertical blanking period of a video signal to be recorded.

, [Function] By recording the character data corresponding to the character signal only during the horizontal scanning period during the vertical retrace period, content information about the recorded program can be recorded without damaging the original video, and can be recorded as needed at any time. Content information can be displayed on the TV screen according to the content.

Furthermore, if the character data of each recorded program is recorded together at the beginning of the videotape, it becomes easier to search for the program, and it is also possible to rewrite part of the program data.

〔Example〕

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

FIG. 1 is a circuit configuration diagram showing an embodiment of a magnetic recording/reproducing apparatus according to the present invention, and FIG. 2 is a waveform diagram of main signals.
is input to the synchronous gate generator 1.

The synchronization gate generator 1 generates a predetermined period 4 of the vertical retrace period 3 from the video signal 2 to be recorded, as shown in FIG.
, a gate pulse 6 corresponding to the horizontal scanning period 5 is generated. Here, the predetermined period 4 is a period of the vertical retrace period 3 excluding the vertical synchronizing signal and equalization pulse.

On the other hand, data regarding the recorded program content is transmitted from the system controller 7 to the character data generation processor 8, and the character data 9
occurs. This character data 9 is a pulse train that is generated in synchronization with the gate pulse 6 and falls within the gate pulse period.

The video signal 2 to be recorded is input to a synthesizer 1o, and the video signal of the horizontal scanning period 5 is replaced with character data 9 for a predetermined period of the vertical period by a gate pulse 6. Generally, the level of the video signal during the vertical blanking period 3 is clamped to the pedestal level.

Data is sequentially stored in the data memory 11 from the character data generation processor 8. The contents of the data include, for example, a program number indicating the number of the recorded program, a title of the program, a recording start time, an end time, a recording start counter value, an end counter value, etc.

Here, the counter value indicated by the frame number of the video signal, etc. is sequentially recorded, and at the same time as recording is stopped, the frame number at the time of stopping is stored as the end counter value.

Further, a character signal 12 corresponding to the character data 9 from the character data generation processor 8 is generated by the character generator 13, added to the input video signal 2 by the monitor output synthesizer 14, and output from the monitor output terminal 15. You can check the text information on the TV screen.

Since this text information is outputted according to the command from the system control section 7 using a signal from the operation section 16, the text information can be viewed at will, and only part of the information, for example, the counter value, can be displayed.

The video signal including the character data output from the synthesizer 10 is recorded on the magnetic tape 21 by the video head 20 at the recording/reproducing amplifier 19 via the FM modulator 18 in the same way as in a normal magnetic recording/reproducing device.

During reproduction, the signal reproduced from the magnetic tape 21 by the video head 2o is amplified by the magnetic recording/reproducing amplifier 19, and converted into a reproduced video signal 23 having character data by the 1M demodulator 22.

This reproduced video signal 23 is transmitted to a synchronization gate generator 24 on the reproduction side.
The gate pulse 25 is generated.

Character data is extracted from the reproduced video signal 23 by a gate pulse 25 by a character data separator 26 and inputted to a character data generation processor 8.

With this character data, character data is output from the character generator 15,
The corresponding character signal 27 is output, and the synthesizer 2 on the playback side
At step 8, the character signal 27 is superimposed on the video signal 23, outputted from the monitor output terminal 15, and displayed on the TV screen.

This character signal information can be displayed and erased on the TV monitor screen at any time in the same way as when recording, using a signal from the operation unit 16.

Here, as shown in FIG. 2, the reproduction side gate pulse 25 is set to have a narrower pulse width than the recording side gate pulse 6 to prevent switching noise from occurring.

FIG. 3 is a circuit configuration diagram showing another embodiment of the present invention. In the embodiment of FIG. 1, a character synthesizer 29 is provided between the video signal input terminal 17 and the synthesizer 10 to generate characters. Vessel 1
3 is superimposed on the input video signal.

With such a configuration, when a plurality of recorded programs are stored on a magnetic tape, the data of each program is stored and accumulated in the data memory 11, and at the beginning of winding the tape 21, all data of each program is stored as character data 9. can be recorded as a character signal 12.

In this case, the character data 9 is recorded during a predetermined period 4 during the vertical blanking period of the video signal, and the character signal 12 is recorded as a character image instead of the video signal.

As described above, according to the present invention, data of a recorded program can be recorded without damaging recorded video, and the data can be checked on a TV monitor at any time.

Furthermore, by recording the contents recorded on the tape at the beginning of winding the tape, the recorded contents can be easily searched.

Furthermore, even if a new program is recorded in the middle of a tape that has already been recorded, program data can be recorded and displayed without duplication.

Then, only part of the data can be confirmed on the TV screen.

〔Effect of the invention〕

As explained above, according to the present invention, character data related to a recorded program is recorded in the form of data at a predetermined location in the vertical retrace period that does not appear on the TV screen, thereby damaging the image appearing on the TV screen. Never.

Furthermore, since the data is recorded sequentially, the data can be read out at any time and checked on the TV screen.

Furthermore, since single character data and character signals can be recorded simultaneously, if an index of the recorded contents of the tape is recorded at the beginning of tape winding, searching for the recorded contents becomes easier.
Furthermore, it is possible to record new contents, solve the problems of the prior art described above, and provide a magnetic recording and reproducing device with excellent functionality.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing one embodiment of a magnetic recording/reproducing apparatus according to the present invention, FIG. 2 is a waveform diagram of main signals, and FIG. 3 is a circuit configuration diagram showing another embodiment of the present invention. 1.24... Synchronous gate generator 7...
......System control section 8...
・・・・・・Character data generation processor 10.28・Song・
Synthesizer 11... Data memory 13...
−・−・・Character generator 16・・・・・・・・・・
...Operation unit 26...Character data separator 29...
・・・・・・・・・Character synthesizer Ta 10・@-8 1 Data memory 5 Sentence-Imo Party Tsuchikuta 24 β1 Simultaneous 8 gate Li evil, 26 Ryota Ta 1 data exciter ＼ small porridge 2 figure -? 5 Closed '5 figure

Claims (1)

[Claims] 1. Means for detecting a predetermined horizontal scanning period during the vertical retrace period of a video signal to be recorded, means for replacing the detected period with arbitrary character data, and storing this character data. a storage means, a means for converting character data into a character signal,
A magnetic recording and reproducing apparatus comprising means for superimposing the character signal on a video signal. 2. A magnetic recording and reproducing apparatus according to claim 1, further comprising means for simultaneously recording character data and character signals.