KR19990025393A - Video cassette recorder with grade playback of video tapes - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape reproducing apparatus in which a first code signal for notifying a grade / type of a video signal and a second code signal for notifying whether or not a first code signal is recorded are added and recorded. A deck (10) for reading out the video signal recorded in the video signal, and a reproduction system (30) for reproducing and outputting the video signal from the deck (10); A code separator 40 for separating and outputting the first and second codes from the video signal of the deck 10; A microcomputer 20 for outputting a control signal indicating that the first code signal is recorded according to the input of the second code signal, and outputting a control signal corresponding to the second code signal when the display key signal is applied; A key matrix 60 having a display key for selectively outputting a display key signal; In response to a control signal from the microcomputer 20, an OSD signal indicating the presence or absence of the first code signal and the grade / type of the video tape by the second code signal is mixed with the video signal of the playback system 30 and output. OSD unit 50 is provided.

Description

Video cassette recorder with grade playback of video tapes

The present invention relates to a video cassette recorder, and more particularly, to a video cassette recorder capable of reproducing a class of video signal recorded 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.

That is, while a minor is watching a video signal of a videotape using a video cassette recorder, there may be a case in which a videotape played by an adult is intended to be used for an adult / minor. After that, the mark of the video cassette is to be checked, and when the video signal of the minor video tape is reproduced and viewed, there is a problem of preventing the viewing of the minor. In order not to cause such a problem, the adult needs to check the contents of the video signal being played while watching the adult.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to insert a video signal of an adult / minor for insertion into an image signal of a videotape so that the video signal of the videotape is easily for adult / minor. It is to provide a video cassette recorder capable of grading playback of video tape which makes it possible to identify.

According to the present invention for achieving the above object, a video signal reproduction of a video tape to which a first code signal for notifying a grade / type of a video signal and a second code signal for notifying whether or not to record the first code signal are added are recorded. An apparatus comprising: a deck for reading a video signal recorded on a video tape, and a reproduction system for reproducing and outputting a video signal from the deck; A code separator for separating and outputting the first and second codes from the video signal of the deck; A microcomputer outputting a control signal indicating that the first code signal is recorded according to the input of the second code signal, and outputting a control signal corresponding to the second code signal upon application of the display key signal; A key matrix having a display key for selectively outputting a display key signal; In response to a control signal from the microcomputer, an OSD unit for mixing the video signal of the reproduction system with an OSD signal indicating the presence or absence of the first code signal and the grade / type of the video tape by the second code signal is provided.

1 is a block diagram of a video cassette recorder for recording information on a rating in an image signal of a video tape so that a video cassette recorder capable of rating playback of a video tape according to the present invention operates;

2 is a block diagram of a video cassette recorder capable of grade playback of a 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 scanning is called interlaced scanning, so it is called interlaced scanning. Since the screen at the end of one vertical scan is called 1 field, 1 screen is composed of 2 fields in interlaced scanning. 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, and the decks (10-1 to 10-n) are microcomputers. 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 separating unit 40 is 0, the OSD control signal is not output. However, when the most significant bit is 1, information indicating the type of the video signal being played may be present. The alert outputs an OSD control signal. 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 OSD character is displayed, and the user operates the display key of the key matrix 60, 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 reproducing a video tape of a video tape to which a first code signal for notifying a grade / type of a video signal and a second code signal for notifying whether or not to record the first code signal are added and recorded therein, A deck 10 for reading out an image signal recorded on the video tape; A reproducing system (30) for reproducing and outputting a video signal from the deck (10); A code separation unit (40) for separating and outputting the first and second codes from the video signal of the deck (10); A microcomputer 20 outputting a control signal indicating that a first code signal is recorded according to the input of the second code signal, and outputting a control signal corresponding to the second code signal when the display key signal is applied; and; A key matrix 60 having a display key for selectively outputting the display key signal; In response to the control signal from the microcomputer 20, an OSD signal indicating the presence or absence of the first code signal and the grade / type of the video tape by the second code signal is mixed with the video signal of the playback system 30. A video cassette recorder capable of class playback of a video tape having an OSD unit (50) for output.