KR19990025380A - Video cassette recorder with grade recording of video tape - Google Patents

Abstract

The present invention relates to a video cassette recorder, comprising: a recording processing system (1) for recording and outputting an input video signal; A key matrix 5 for outputting a key signal indicating the class / type of the video signal; A microcomputer 2 which outputs a control signal corresponding to the key signal from the key matrix 5; A code generator 4 for outputting a code signal corresponding to the control signal and adding and outputting a code signal indicating whether the control signal is applied; A code synthesizing unit 3 for inserting and outputting the code signal from the code generating unit 4 within the vertical blanking period in the video signal of the recording processing system 1; Deck 10-1 to 10-n which records the video signal of the code | combination part 3 to a video tape are provided.

Description

Video cassette recorder with grade recording of video tape

The present invention relates to a video cassette recorder, and more particularly, to a video cassette recorder capable of recording a grade of an image signal on a video tape.

A video cassette recorder is a device that records video signals on a video tape or reads and reproduces video signals recorded on a magnetic tape by using magnetic characteristics.

Such video tapes are mass-produced for commercial purposes and are rented or sold to general users. On the other hand, video signals recorded on a videotape are largely classified into adult and minor grades, and due to the characteristics of the videotape, there is a problem in that a restriction that prevents a minor from viewing a videotape of an adult videotape is inappropriate. In other words, in general theaters, it is possible to prevent minors from watching adult movies by prohibiting minors from entering the theater in the case of adult use, but video tapes are rented and sold to general consumers as described above. When a minor obtains an adult video tape, there is a problem that the video signal of the adult video tape can be viewed.

In order to solve such a problem, conventionally, a video tape is used to indicate an adult and a minor to a video cassette having a case, but such a mark has a problem that it can be easily damaged by external conditions, and the video tape is loaded into a video cassette recorder. In this state, there is a problem that the verification is impossible.

In other words, while a minor is watching a video signal of a videotape using a video cassette recorder, there is a case where an adult who wants to check whether the played videotape is for an adult or a minor is used. In this case, the loaded videotape is conventionally unloaded. After the marking of the video cassette is confirmed, there is a problem that the viewing of the minor video tape is prevented when the video signal of the minor video tape is reproduced and viewed. In order not to cause such a problem, there is a problem that the adult needs to check the contents of the video signal being played while the adult is watching.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to easily insert an adult / minor signal into an image signal recorded on the videotape, so that the video signal of the videotape is for adult / minor use. A video cassette recorder capable of classifying recording of identifiable video tapes is provided.

The present invention for achieving the above object comprises: a recording processing system for recording and outputting an input video signal; A key matrix for outputting a key signal indicating a class / type of the video signal; A microcomputer for outputting a control signal corresponding to the key signal from the key matrix; A code generator for outputting a code signal corresponding to the control signal and adding and outputting a code signal indicating whether the control signal is applied; A code synthesizing section which inserts and outputs a code signal from the code generating section within the vertical blanking period in the video signal of the recording processing system; A deck for recording the video signal of the code synthesizing unit on a video tape.

1 is a block diagram of a video cassette recorder capable of grade recording of a video tape according to the present invention;

Fig. 2 is a block diagram of a video cassette recorder for indicating the rating of a recorded video tape according to the present invention.

Explanation of symbols for main parts of the drawings

1: recording processing system 2: microcomputer

3: synthesizer 4: code generator

5: key metrics 10, 10-1 to 10-n: deck

20: micom 30: regeneration system

40: code separation unit 50: OSD unit

60: key metrics

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a video cassette recorder according to the present invention, in which the video cassette recorder according to the present embodiment exemplifies a case of a duplicater for mass copying a video tape for commercial purposes.

As shown, the recording processing system 1 is configured to record and apply an input video signal to the code synthesizing unit 3 according to the recording control signal of the microcomputer 2. The code synthesizing section 3 records the code signal applied from the code generating section 4 as information indicating the grade of the video tape within the vertical blanking period of the video signal.

In other words, the TV video signal currently being used is interlaced scanning method. When the scanning of the video signal starts from the upper left of the screen and sequentially scans and reaches the bottom center of the screen, the TV video signal is returned to the upper side and the gap that has been previously scanned The very end is done by the injection to the bottom right. In this way, interlaced scans are spaced one by one, so they are called interlaced scans. Interlaced Scanning is called. One screen consists of two fields. do.

In this interlaced scan, the electron beam needs to return from the bottom to the top of the screen. This is called vertical retrace. In this vertical retrace period, substantially horizontal scanning is performed continuously. However, since this period is not required as an image, a blanking signal enters, and this period is called a vertical blanking interval. It is known that the vertical blanking period is made up of 21 horizontal scanning periods so that information such as text data can be duplicated at appropriate positions.

Therefore, in the present invention, a code indicating the video signal class of a video tape can be recorded within the vertical blanking period of the video signal, and the above-described code synthesizing section 3 performs this operation.

Here, the code generator 4 outputs a code signal according to the control of the microcomputer 2. That is, the microcomputer 2 outputs a control signal corresponding to the driving key of the key matrix 5, and the code generator 4 applies the code signal corresponding to the synthesizer 3 to this. In this embodiment, the code output from the code generator 4 is composed of 4 bits. Here, the most significant bit may be used as information for informing whether a code is present, and in this case, a total of 2 ³ types of 8 codes may be generated. In other words, when the control signal is not applied from the microcomputer 2, the synthesis unit 3 outputs (0 XXX) (where X is a don't care state), where the most significant bit 0 generates useful code information. The lower bit information is not available as information indicating the type of the video signal, as described later. However, when a control signal is applied from the microcomputer 2, (1 XXX) is output. , 1, which is the most significant bit, indicates that the codes of the lower bits are information indicating the type of video signal. In this case, the types (classes) of the video signals recorded on the video tape can be divided into eight levels. Such levels may be sequentially divided from full adult to infant, or may be divided into types of images, such as adult, minor, educational, entertainment, and drama.

Thus, the key metrics 5 should each be configured with keys that command such codes. That is, as described above, when eight types of codes are provided, keys corresponding to each of them must be configured. When one of these keys is driven, the microcomputer 2 applies a control signal corresponding to the driving key to the synthesis unit 3, and the synthesis unit 3 outputs a code signal corresponding to the type of control signal. However, as described above, the most significant bit is to insert and output a code indicating the presence or absence of a code signal.

In this way, the video signal in which the code signal is recorded in the vertical blanking period by the combining unit 3 is applied to the decks 10-1 to 10-n, respectively. The video signal is recorded on the video tape in accordance with the recording control signal from 2).

Therefore, in the case of the general video tape which reproduces the video signals recorded with the code signal in this way, the most significant bit of the vertical blanking period is examined, and in the case of 0, the grade or type of the video signal is not indicated by the information of the lower bit. However, when the most significant bit is 1, the class or type of the video signal based on the information of the lower bit may be indicated.

2 shows a block diagram of such a video cassette recorder.

The illustrated deck 10 reads and outputs an image signal recorded on a video tape by driving in the reproduction mode by the reproduction control signal of the microcomputer 20.

The video signal read out from the deck 10 is applied to the reproduction system 30 and the code separation unit 40 as shown, and the reproduction system 30 processes the image signal from the deck 10 to display the OSD unit. It is applied to 50. The code separating unit 40 detects a synchronization signal from the video signal from the deck 10, separates the code signal included in the vertical blanking period, and applies it to the microcomputer 20.

The microcomputer 20 controls the driving of the video cassette recorder in response to the driving of the function keys configured in the key matrix 60, while applying the code from the code separating unit 40 when the video cassette recorder is driven in the playback mode. The OSD control signal is output in response to the code signal.

That is, when the most significant bit of the code signal from the code separation unit 40 is 0, the OSD control signal is not output. When the most significant bit is 1, the information indicating the type of the video signal being played and the code signal are notified. The OSD control signal is output. When the display key of the key matrix 60 is driven, the grade / type of the input code signal is determined to output the corresponding OSD signal.

Here, the OSD unit 50 outputs an OSD character corresponding to the OSD control signal of the microcomputer 20 to the video signal of the playback system 30, and the general viewer may display the video signal grade / type of the video tape being played. It can be easily seen. That is, the OSD character is not displayed when the most significant bit of the code signal is 0, but when the most significant bit is 1 as described above, the OSD unit 50 notifies that there is a code signal under the control of the microcomputer 20. When the user displays the OSD text, and thus the display key of the key matrix 60 is driven by the user, the microcomputer 20 outputs an OSD control signal corresponding to the code signal, thereby allowing the OSD unit 50 to display an image according to the code signal. It will display an OSD character indicating the class / type of the signal.

As described above, the present invention has an effect that the user can easily know the grade / type of the image signal as needed by inserting a signal informing the grade / type of the image signal in the image signal recorded on the videotape.

Claims (1)

An apparatus for recording a video signal on a video tape, A recording processing system 1 for recording and outputting an input video signal; A key matrix 5 for outputting a key signal indicating the class / type of the video signal; A microcomputer 2 for outputting a control signal corresponding to the key signal from the key matrix 5; A code generator (4) for outputting a code signal corresponding to the control signal and adding and outputting a code signal indicating whether the control signal is applied; A code synthesizing unit (3) for inserting and outputting the code signal from the code generating unit (4) within the vertical blanking period in the video signal of the recording processing system (1); A video cassette recorder capable of grade recording of a video tape having decks (10-1 to 10-n) for recording the video signal of the code synthesizing unit (3) on a video tape.