KR970011829B1 - Automatic viss inserting apparatus in a complex product of optical disk player and video cassette recorder - Google Patents

Abstract

an optical pickup(4) reading data recorded in an optical disc(2); a RF amplifying part(6) amplifying a RF signal read in the optical pickup(4); a EFM modulation part(8) performing EFM modulation of the output signal of the RF amplifying part(6); a sub code synchronization detection part(20) detecting a sub code synchronization signal among the signals from the EFM modulation part(8); a sub code demodulation part(22) demodulating the sub code among the signals from the EFM modulation part(8); a CDG decoder(24) decoding the sub code from the sub code demodulation part(22); a RGB encoder(26) encoding the decoding signal of the CDG decoder(24) to a composite image signal; a video signal processing part(30) performing the signal processing of the composite image signal from the RGB encoder(26) and applying it to a video head(34); a song front detecting part(36) outputting a control signal by detecting the front of a recorded context among the sub code signals; a vertical synchronization separation part(38) separating a vertical synchronization signal among the composite image signals from the RGB encoder(26); a duty changing part(40) changing ON-DUTY RATIO of the vertical synchronization signal; and a switching means(42) selecting by switching the vertical synchronization signal and the output of the duty changing part(40) and outputting it to a control head(46).

Description

Vis automatic insertion device in combination of optical disc player and VCR (VIDEO CASSETTE RECORDER)

1 is a circuit block diagram showing a non-automatic insertion device in a composite product of an optical disc player and a VCR according to the present invention;

FIG. 2 is a diagram showing a specific configuration of the duty converter shown in FIG.

* Explanation of symbols for main parts of the drawings

2: optical disc 4: optical pickup

6 RF amplifier 8 EFM demodulator

10: audio signal processing unit 12: digital / analog changing unit

14 low pass filter 16 amplification unit

18: audio head 20: sub code synchronization detector

22: sub code demodulator 24: CDG decoder

26: RGB encoder 28: memory

30: video signal processor 32: amplifier

34: video head 36: curved head detection unit

38: vertical synchronization separator 40: duty converter

40A: Integrator 40B: Schmitt trigger circuit

42: switching means 44: amplification unit

46: control head

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-automatic insertion apparatus in a composite product of an optical disc player and a VCR (VIDEO CASSETTE RECORDER), and more particularly, to distinguish between recorded contents (songs) when recording recorded contents on an optical disk on video tape. The present invention relates to an automatic disc insertion apparatus for a combination of an optical disc player and a VCR, which automatically inserts a vis at the beginning of the recorded contents.

Nowadays, as a data recording medium in the form of optical discs in which a large amount of audio information is recorded, compact discs such as compact disc digital audio (CDDA) and compact disc graphics (CDG) have been developed and widely used. Is optically detected and reproduced, which theoretically has the advantage of always having a uniform hi-fi reproduction characteristic regardless of the number of times the disc is played.

The data recorded on the compact disc has a synchronization signal, and the block from the synchronization signal to the next synchronization signal is called a frame. Each frame starts with a synchronization signal (frame synchronization signal) indicating the beginning of the frame. There is a subcode containing control information and various service information, and there are also audio signals and error correction signals. There are eight channels of P / Q / R / S / T / U / V / W in the subcode, and in compact disc digital audio (CDDA), song number and index number are generally used using only P and Q channels. , The playback time of the song, the cumulative time from the beginning of the program, the presence / absence of an audio signal, and the like. In the CDG disc, still picture data (graphic data) is recorded using R-W channels of subcodes using the compact disc digital audio (CDDA) format as it is, and a CDG player for reproducing such a CDG is developed. As a result, it is possible to obtain high-fidelity audio such as compact disc digital audio and display graphic background and subtitle images through a display device such as a television screen or a monitor. To meet.

On the other hand, a video tape recorder for recording a video signal and an audio signal on a video tape using a magnetic head or reproducing a video signal on a video tape recorded on the video tape has been developed and widely used in general homes. In such a video tape recorder, random access for recording and reproducing by accessing the target position within a short time is impossible due to the recording and reproduction characteristics of the video signal and the audio signal on the video tape. Therefore, in recent years, a so-called "vis function" has been proposed and applied to a video tape recorder, which shows the possibility of high-speed access to the recording contents of a target position even when a large number of recording contents are recorded on the video tape. In this service function, for example, when recording a plurality of recording contents (e.g. drama, TV tutoring, news, etc.) on one video tape, the user inputs a key (or the recording mode) at the recording start portion of each recording contents. By automatically recording " bismarks ", it is possible to quickly suppress target recording contents based on the bismarks during playback.

Recently, as the above-mentioned optical disc player and video tape recorder are widely used, development of a compact product which is a combination of these devices has been progressed. Such a composite product has a video tape playback operation and recording of a TV broadcast signal through a tuner. The operation, the recording operation of the signal input from the camcorder as an external input signal, for example, the reproduction operation of the optical disc, and the recording operation of the video signal and / or the audio signal reproduced on the optical disc can be controlled by one control input unit. .

However, if the recorded contents reproduced on the optical disc are recorded on the video tape, the recorded contents (songs) recorded on one video tape are increased. Thus, a plurality of recorded contents are recorded on one video tape. Fast access to the recorded contents becomes difficult. In the case of using the vis function that recorded the vis mark through key input (or automatically when the user selects the recording mode) in the recording start part, conventionally, when recording a plurality of contents recorded on the optical disc at once In the start portion, the bismark is automatically recorded, but the bismark is not recorded between the recording contents, so that the conventional vis function is meaningless.

Accordingly, the present invention has been made in view of the above circumstances, and when the recording contents recorded on the optical disc are recorded on the video tape, the optical disc player is automatically inserted at the beginning of the recording contents by using the recording content leading display of the sub code. The object of the present invention is to provide a non-automatic insertion device for a combination product of a and a VCR.

According to a preferred embodiment of a non-automatic insertion device in a composite product of an optical disc player and a VCR according to the present invention for achieving the above object, there is provided an optical pickup for optically reading data recorded on an optical disc, and in the optical pickup. An RF amplification unit for amplifying the read RF signal, an EFM demodulation unit for demonstrating EFM (Eight to Fourteen Modulation) output signal, and a sub code for detecting a sub code synchronous signal among the signals output from the EFM demodulation unit A sub code demodulator for detecting and demodulating a sub code from a signal output from the EFM demodulator, and receiving and decoding a sub code synchronous signal from the sub code synchronous detector and a sub code from the sub code demodulator A CDG decoder, an RGB encoder which receives a decoding signal of the CDG decoder and encodes it into a composite video signal, the RGB encoder In the composite video signal of the composite product CDG player, a VCR having a video signal processor for applying to the signal processing section to the amplification medium from the video head; A curve head detector for detecting the head of the recording content from the sub code signal demodulated by the sub code demodulator and outputting a predetermined control signal, and a vertical synchronization separator for separating the vertical synchronization signal from the composite video signal from the RGB encoder. A duty converter for changing an on-duty ratio of the vertical synchronization signal from the vertical synchronization separator, and a vertical signal from the vertical synchronization signal separator according to the predetermined control signal from the curve head detector. And switching means 42 for switching the synchronization signal and the output of the duty converter to output the control head 46 through the amplifier.

Here, the recording content head is determined by the signal level of the P channel of the sub code, and the predetermined control signal from the curve head detecting part is set by the switching means only for a predetermined time when the recording content head is detected. It is desirable to control the switching to select the output.

The duty converter includes an integrator for integrating vertical synchronization from the vertical synchronization separator, and a schmitt trigger circuit for outputting a bis signal of varying duty ratio using the output signal of the integrator as a reference signal. The circuit is preferably set so that the ratio of the high level to the low level of the bis signal is 27.5: 72.5.

According to the present invention configured as described above, the vertical sync signal is separated from the composite video signal from the RGB encoder, the on-duty ratio of the vertical sync signal is converted to generate a bis signal, and the sub code demodulated by the sub code demodulator. If the head of the recording content is detected in the signal, the vis signal is selected. If not, the vertical synchronization signal is selected and the synchronization signal and the vis signal are recorded by applying an amplifier to the control head.

Hereinafter, with reference to the accompanying drawings it will be described in detail with respect to the non-automatic insertion device in the composite product of the optical disk player and the VCR according to the present invention.

1 is a circuit block diagram showing a non-automatic insertion device in a combination product of an optical disc player and a VCR according to the present invention. In the figure, reference numeral 2 denotes an optical disc such as a CDG, 4 denotes an optical pickup for optically reading data recorded on the optical disc 2, and 6 denotes an optical detector 4 which is not shown. An RF amplifying unit for amplifying an RF signal, and 8 is an EFM demodulating unit for receiving, for example, EFM demodulating the RF signal from the RF amplifying circuit 6.

In addition, reference numeral 10 is an audio signal processor for detecting an audio signal among the signals demodulated by the EFM demodulator 8 to process an audio signal, and 12 is an analog signal for converting the digital audio output signal of the audio signal processor 10 into analog. A digital / analog converter, 14 is a low pass filter for removing noise of the analog-converted audio signal, and 16 is an amplifier for amplifying and applying the noise-removed analog audio signal to the audio head 18. .

Reference numeral 20 denotes a subcode synchronous detector for detecting a subcode synchronous signal among the signals output from the EFM demodulator 8, and 22 denotes a subcode among the signals output from the EFM demodulator 8; A subcode demodulation section for demodulating, 24 denotes an analog form for receiving the subcode synchronization signal from the subcode synchronous detection section 20 and the graphic data of the R to W channels among the subcodes from the subcode demodulation section 22. Is a CDG decoder which converts the signal into R, G, B, and then temporarily stores it in the memory 28 and outputs it in units of one screen. 26 denotes an output signal of the R, G, B signals of the CDG decoder 24. Or an RGB encoder that converts and outputs a composite video signal that can be displayed on a monitor, and 30 denotes a video signal by processing the composite video signal from the RGB encoder 26 through an amplifying unit 32. Authorized to BD A signal processing unit. The configuration described above is the same as that of a general optical disc player and a VCR.

On the other hand, in the present invention, the head of the recording content (curve) is detected in accordance with the level value of the P channel signal of the subcode demodulated by the subcode demodulation section 22. A curved head detector 36 for outputting a predetermined control signal and a vertical sync separator 38 for separating the vertical sync signal from the composite video signal from the RGB encoder 26 A duty converter 40 for generating a bis signal by varying the on-duty ratio of the vertical synchronization signal from the vertical synchronization separator 38, and according to the predetermined control signal from the curve head detection unit 36; Switching means 42 for switching the vertical synchronizing signal from the vertical synchronizing signal separation unit 38 and the bis output of the duty converter 40 to select and output the amplification unit 44 to the control head 46 via the amplification unit 44. It is installed more. Here, the predetermined control signal is such that the switching means 42 switches the output of the duty converter 40 only for a predetermined time (for example, 2 seconds) upon detection of the head of the recording content.

As shown in FIG. 2, the duty converter 40 uses the integrator 40A for integrating the vertical synchronization from the vertical synchronization separator 38 and the output signal of the integrator 40A as reference signals. It consists of the Schmitt trigger circuit 40B which outputs the bis signal which a duty ratio changes. Here, the ratio of the high level to the low level of the bis signal output from the schmitt trigger circuit 40B is set to 27.5: 72.5.

Next, the operation of the non-automatic insertion device in the composite product of the optical disc player and the VCR according to the present invention configured as described above will be described.

That is, when a user operates a key input section (not shown) to edit audio signals and / or video signals recorded on an optical disc such as a CDG on a video tape, the playback operation is started on the optical disc player side and simultaneously recorded on the video tape recorder side. The action will be recorded. First, when the start point of the recording contents recorded on the optical disc 2 is the head of the recording contents, the curve head detecting unit 36 detects whether the signal level of the P channel of the sub code is high level or low level. As the high level is detected, the first control signal is outputted to the switching means 42 for about 2 seconds so that the switching means 42 switches and selects the amplification signal from the duty converter 40. The section 44 is applied to the control head 46 via the media to insert the video into the videotape.

On the other hand, in the case where the recording time of the recording contents recorded on the optical disc 2 is not at the head of the recording contents, the curve head detecting section 36 detects the signal level of the P channel of the sub code at a low level so that the switching means ( By continuously outputting the second control signal to 42, the switching means 42 selects the synchronous signal from the vertical synchronous separator 38 and applies it to the control head 46 via the amplifier 44. This allows the synchronization signal to be recorded on the video tape.

As described above, according to the present invention, when recording an audio signal and / or a video signal recorded on an optical disc on a video tape, the vertical synchronization signal is separated from the composite video signal from the RGB encoder, and the on-duty of the vertical synchronization signal is A non-signal signal is generated by converting the ratio, and if a recording content head is detected among the subcode signals demodulated by the subcode demodulator, the vis signal is selected. By applying, the synchronization signal and the bis signal are recorded. As a result, when recording the recorded contents recorded on the optical disc to the videotape, the vis can be automatically inserted at the beginning of the recorded contents by using the recorded content head display of the subcode. Therefore, when the vis is inserted into the video tape as described above, a large number of recorded contents can be accessed at a very high speed when the video tape is reproduced.

Claims (5)

An optical pickup 4 for optically reading data recorded on the optical disc 2, an RF amplifier 6 for amplifying the RF signal read out from the optical pickup 4, and an RF amplifier 6 An EFM demodulator 8 for EFM demodulating the output signal, a subcode synchronous detector 20 for detecting a subcode synchronous signal among the signals output from the EFM demodulator 8, and an output from the EFM demodulator 8 A subcode demodulator 22 for detecting and demodulating a subcode among the signals, and a subcode synchronous signal from the subcode synchronous detection unit 20 and a subcode from the subcode demodulator 22 for decoding. The CDG decoder 24, an RGB encoder 26 that receives the decoding signal of the CDG decoder 24 and encodes the composite video signal, and amplifies the composite video signal from the RGB encoder 26 by signal processing. The video signal processor 30 is applied to the video head 34 via In a combination product of a CDG player and a VCR, a curve head detection section 36 for detecting the head of recording contents among the sub code signals demodulated by the sub code demodulation section 22 and outputting a predetermined control signal, and the RGB encoder ( A duty cycle for changing the on-duty ratio of the vertical sync signal from the vertical sync separator 38 for separating the vertical sync signal from the composite video signal Switching of the vertical synchronization signal from the vertical synchronization signal separation unit 38 and the output of the duty conversion unit 40 according to the predetermined control signal from the conversion unit 40 and the curve head detection unit 36 Bis automatic insertion device in the composite product of the optical disc player and VCR, characterized in that it comprises a switching means 42 for outputting to the control head 46 via the amplifier 44. The apparatus of claim 1, wherein the recording content head is determined by the signal level of the P channel of the sub code. The control signal of claim 1, wherein the predetermined control signal from the curve head detecting unit 36 causes the switching means 42 to select the switching of the output of the duty converting unit 40 only for a predetermined time when the recording content head is detected. Vis automatic insertion device in the combination of optical disc player and VCR, characterized in that the control. 4. The duty converter according to claim 1, wherein the duty converter 40 is configured to use the integrator 40A for integrating the vertical synchronization from the vertical synchronization separator 38 and the output signal of the integrator 40A as reference signals. Bis automatic insertion device in a combination product of an optical disc player and a VCR, characterized by consisting of a Schmitt trigger circuit (40B) for outputting a non-variable bis signal. 5. The non-automatic insertion of an optical disc player and a VCR in a composite product according to claim 4, wherein the schmitt trigger circuit 40B is set so that the ratio of the high level to the low level of the vis signal is 27.5: 72.5. Device.