KR19990073958A - High-definition digital VR record and playback device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reproducing apparatus for high-definition digital VRs. In the related art, in the case of high-definition digital VRs, recording / reproducing of a video signal in a VRC or a video signal reproducing from a V.C. There is a problem of controlling the regenerative servo. Accordingly, the present invention provides a synchronization separator 11 for separating the composite synchronous signal (C-SYNC) from the video signal input to the BC-R, and the luminance signal (Y) and the color signal (C) from the video signal input to the BC-C. A luminance / color signal separator 12 for outputting the separated signal and outputting the separated signal, and a color signal C separated by the luminance / color signal separator 12 to be decoded to decode the color difference signal RY (BY). The color decoder 13 to generate | occur | produces, the composite synchronous signal C-SYNC of the said synchronous separation part 11, the luminance signal Y of the luminance / color signal separation part 12, and the color difference signal of the color decoder 13 Transmit the first and second time-combined combined signals Tci1 and Tci2, which are generated by receiving (RY) (BY) and time-compressed, respectively, through a single channel, and complexing the first time-compressed combined signal. The multiplexer 14 generates and outputs a synchronization signal Tci1-C-SYNC, and the first time combined signal Tci output from the multiplexer 14. 1) a main luminance / color signal separating unit 15 which receives the luminance / color signal of the main screen and outputs it separately, and receives the second time compression combining signal Tci2 when the multiplexing unit 14 outputs the luminance of the sub-screen. The sub-luminance / color signal separation unit 16 for separating and outputting the color signal and the composite synchronous signal C-SYNC outputted from the synchronous separation unit 11, and checking the presence or absence of the input image signal. The microcomputer 17 generates and outputs a servo control signal SERVO CNT based on the composite synchronization signal Tci1-C-SYNC of the first time compression combined signal Tci1 output from the multiplexer 14 when there is a signal. And a servo system 18 for recording a signal output from the main and sub luminance / color signal separation units 15 and 16 according to the servo control signal Servo CNT provided by the microcomputer 17. To record video signals to VRF or to recreate them By using the composite video signal of the video signal input or output at the time, it can be used as the reference signal like the standard video signal, so that you can enjoy the clear image quality without jitter, and the video signal input to the VC, the recorded video signal, and VRC This eliminates the time delay between the video signal played back from the video signal and the video signal output to the outside.

Description

High-definition digital VR record and playback device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recording and reproducing high-definition digital VCRs, and more particularly, by using a composite video signal of a video signal inputted or outputted when recording a video signal or reproducing a video signal from a VR. The present invention relates to an apparatus for recording and reproducing high-definition digital VRs that can be used as a reference signal such as a standard video signal so that a video signal can be recorded or reproduced without a time delay, and provide a clear picture quality.

In a high quality digital TV (AD-VCR), a video signal can be recorded or reproduced.

First, when the video signal is to be recorded on the VRC, the composite synchronous signal C-SYNC is separated from the video signal input to the VR, and the separated composite synchronous signal C-SYNC is used as a reference signal of the servo.

Then, the luminance signal Y and the color signal C are separated from the video signal, and the separated luminance signal Y and the color signal C are recorded in accordance with the composite synchronization signal C-SYNC.

When the video signal is reproduced from the VRL, a ref 30Hz corresponding to the standard synchronization signal is generated to synthesize the luminance signal Y and the color signal C, which are reproduced, according to their frequencies, thereby producing a video signal.

However, when the video signal is recorded in the conventional high-definition digital VR (AD-VCR) as described above, there is a problem that the recording of the video signal is wrong because there is a time difference between the video signals recorded in the video signal input to the VC. When reproducing the video signal, the synchronization of the output screen should be generated as a standard video signal to absorb the jitter (JITTER) possessed by the VR servo. In order to do this, the reproduction servo must be driven based on the standard synchronization. This has a problem of generating a separate synchronization signal. As a result, there is a problem in recording / reproducing servos in a high definition digital VLC using a method different from the general VLC control method.

Accordingly, an object of the present invention for solving the conventional problems as described above is to record a video signal or play a video signal from the VRC based on the composite synchronous signal of the video signal input and output instead of a separate composite synchronous signal. The present invention provides a recording and reproducing apparatus for high-definition digital VR.

Another object of the present invention is to provide an apparatus for recording and reproducing a high definition digital VLC capable of removing jitter in reproducing a video signal in a high definition digital BC.

It is still another object of the present invention to provide an apparatus for recording and reproducing high-definition digital VRs that can provide clear picture quality.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a recording apparatus of the present invention high definition digital VR.

FIG. 2 is a timing diagram of input and output signals when recording a video signal in FIG. 1; FIG.

3 is a block diagram of a high definition digital BC drum.

4 is a circuit diagram of a reproducing apparatus of the present invention high-definition digital VR;

FIG. 5 is a timing diagram of an input / output signal during video signal reproduction in FIG. 4; FIG.

*** Explanation of symbols for main parts of drawing ***

101: sync signal separator 12: luminance / color signal separator

13: color decoder 14: multiplexer

15: main luminance / color signal separation unit 16: sub luminance / color signal separation unit

17,27: microcomputer 18: recorder

In order to achieve the above object, the present invention provides a synchronization separator for separating a composite synchronous signal by receiving an image signal inputted through a BC-R, and a luminance / color signal separator for separating a luminance signal and a color signal from the image signal; And a color decoder configured to receive color signals separated by the luminance / color signal separation unit to generate a color difference signal, and to time-compress the composite synchronization signal, the luminance signal, and the color difference signal output from the respective units. And a multiplexing unit for generating and outputting a head switching signal of a head for recording the first time-compression combined signal, and receiving a complex synchronous signal output from the synchronous separation unit and checking the presence or absence of an input signal. If present, the first and second time compression combined signals can be recorded in the servo system using the head switching signal output from the multiplexer. A microcomputer for outputting a servo control signal to be locked, a main luminance / color signal separator for separating the luminance signal and the color signal of the main screen from the first time compression combined signal output from the multiplexer, and a multiplexer outputted from the multiplexer A sub-luminance / color signal separation unit for separating the luminance signal and the color signal of the sub-screen from the second time compression combined signal, and the signals output from the main and sub luminance / color signal separation units, respectively, according to the servo control signal of the microcomputer. It is characterized by consisting of a servo system.

In addition, the present invention separates the main screen from the luminance signal and the color signal output from the servo system, and uses the separated signal to generate a first time compression combined signal using the main luminance / color signal combining unit, A sub luminance / color signal synthesizing unit for separating a sub-picture for a sub-picture from the color signal and generating a second time compression combining signal, and receiving the first time compression combining signal output from the main luminance / color signal combining unit A first composite synchronous signal generator for generating and outputting a composite synchronous signal of the first time compressed combined signal, and receiving the second time compressed combined signal output from the sub-luminance / color signal combiner; A second composite synchronous signal generator for generating and outputting a synchronous signal; A demultiplexer for separating and outputting color signals and outputting a composite synchronous signal for reproduction, and a microcomputer for generating a servo control signal using the composite synchronous signal for reproduction output from the demultiplexer and providing the servo signal to the servo system; And a synthesizer for synthesizing the luminance signal and the color signal output from the demultiplexer to generate an image signal.

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

FIG. 1 is a circuit configuration diagram of a high-definition digital VR recording apparatus according to the present invention. As shown in FIG. 1, a synchronous separation section 11 for separating a composite synchronous signal C-SYNC from a video signal input to a VCD is shown. ), A luminance / color signal separation unit 12 which separates the luminance signal Y and the color signal C from the video signal input to the VR, and outputs the separated signal, and the luminance / color signal separation unit 12. A color decoder 13 that receives and decodes the separated color signal C in order to generate a color difference signal RY (BY), and a complex synchronous signal C-SYNC and luminance / First and second time-combined combined signals Tci1 (Tci2) generated by receiving the luminance signal Y of the color signal separation unit 12 and the color difference signal RY (BY) of the color decoder 13, respectively, and time-compressing them. ) Is transmitted through a single channel, and a complex synchronization signal (Tci1-C-SYNC) of the first time compression combined signal is generated. A main luminance / color signal separation unit 15 for receiving the multiplexing unit 14 and the first time compression combining signal Tci1 output from the multiplexing unit 14, and separating and outputting the luminance / color signals of the main screen. And a sub-luminance / color signal separator 16 for receiving a second time-combined combined signal Tci2 when the output from the multiplexer 14 separates and outputs the luminance / color signal of the sub-screen, and the synchronization separator 11. The composite synchronous signal (C-SYNC) outputted from the input signal is checked to check whether there is an input video signal, and if there is an input video signal, the composite synchronous signal of the first time compression combined signal (Tci1) output from the multiplexer (14). The main and sub-luminance according to the microcomputer 17 which generates and outputs the servo control signal SERVO CNT by Tci1-C-SYNC and the servo control signal SERVO CNT provided by the microcomputer 17. / To record the signal output from the color signal separation unit (15, 16) The system consists of 18.

4 is a circuit configuration diagram of the high definition digital VRL reproducing apparatus of the present invention. As shown in FIG. 4, the luminance signal for the main picture and the color signal are separated from the image signal output from the servo system 21. The main luminance / color signal synthesizing unit 22 for generating a first time-combined combined signal Tci1 for reproduction by using the separated signal, and the luminance signal and the color signal for the sub-screen are separated from the video signal. A sub-luminance / color signal synthesizing section 23 for generating a second time-compression combining signal Tci2 for reproduction using the signal, and a first-time compression combining for reproduction output from the main luminance / color signal combining section 22; A first composite synchronous signal generator 24 which receives a signal and generates and outputs a composite synchronous signal Tci1-C-SYNC of the first time compression combined signal, and is output from the sub-luminance / color signal combiner 23 Receiving the second time compression combined signal A second composite synchronous signal generator 25 which generates and outputs a composite synchronous signal Tci2-C-SYNC of the two-hour compressed combined signal, and a first and second time-coupled combined signal Tci1 output from the respective units. A demultiplexer 26 which receives Tci2 and its composite synchronization signal Tci1-C-SYNC and Tci2-C-SYNC, separates and outputs a luminance signal and a color signal, and outputs a composite synchronization signal for reproduction; And a microcomputer 27 for generating a servo control signal SERVO CNT to the servo system 21 by using the regenerative composite synchronization signal output from the demultiplexer 26, and the demultiplexer 26. And a synthesizer 28 for synthesizing the luminance signal and the color signal outputted from 26) and generating an image signal.

Referring to the operation and effect of the present invention configured as described in detail as follows.

In FIG. 1, when a video signal for recording to a VRC is input from the outside, the composite synchronization signal C-SYNC is separated from the video signal input from the sync separator 11 and output to the multiplexer 14. .

In addition, the luminance / color signal separator 12 separates the luminance signal Y and the color signal C from the video signal inputted through the V-al, and the luminance signal Y of the separated signals is transferred to the multiplexer 14. The color signal C is output to the color decoder 13, respectively.

The color decoder 13 decodes the color signal C received from the luminance / color signal 12, generates a color difference signal R-Y (B-Y), and outputs the color difference signal R-Y (B-Y) to the multiplexer 14.

Accordingly, the multiplexer 14 outputs the composite synchronous signal C-SYNC outputted from the synchronization separator 11, the luminance signal Y of the luminance / color signal separator 12, and the color decoder 13. The first color compression signal RY (BY) is input, and the first time compression combined signal Tci1 and the second time compressed combined signal Tci2 are time-compressed so as to have a bandwidth with respect to the input signals having different bandwidths. Create

The first time compression combining signal Tci1 generated as described above is output to the main luminance / color signal separating unit 15, and the second time compression combining signal Tci2 is output to the sub luminance / color signal separating unit 16.

However, as shown in FIG. 2 (a), the composite synchronous signal C-SYNC of the video signal inputted through V-Cal and the actual output of the multiplexing unit 14 and recorded in the servo system as shown in FIG. 2 (b). There is a time delay such as α between the first time-combined combined signal Tci1.

Accordingly, the multiplexer 14 is a signal that is used as a reference for controlling the servo system for recording to prevent a time delay such as α, and the combined synchronization signal Tci1-C-SYNC of the first time combined signal Tci1. 2 is made as shown in FIG. 2 (d) and output to the microcomputer 17.

Then, the microcomputer 17 receives the composite synchronization signal C-SYNC outputted from the synchronization separator 11 and checks whether there is an input image signal.

If it is determined that there is an input video signal, the microcomputer 17 receives the complex synchronization signal Tci1-C-SYNC of the first time-combined combined signal Tci1 provided from the multiplexer 14 and receives the servo signal. A servo control signal (SERVO CNT) for controlling the system 18 is generated and output to the servo system 18.

Referring to the drum of V-CAL, as shown in FIG. 3, after the composite synchronous signal corresponding to the Tci1 channel (A) is started, the Tci2 channel (B) appears after 120 ° and the composite synchronous signal corresponding to the Tci2 channel (B). After the start, the Tci1 channel (A ') appears again after 60 °, and the Tci2 channel (B') appears 120 ° after the start of the composite synchronous signal corresponding to the Tci1 channel (A ').

The above operation is repeated.

That is, the microcomputer 17 is a servo system 18 for recording, and the servo system 18 outputs the combined synchronous signal Tci1-C-SYNC of the first time-compression combined signal Tci1 as shown in FIG. And outputs the composite synchronization signal Tci2-C-SYNC of the second time compression combined signal Tci2 after 120 °, and then outputs the composite synchronization signal Tci2-C-SYNC of the second time compression combined signal Tci2, and then passes the mixed signal of the first time compression combined signal Tci1 after 60 °. The servo control signal SERVO CNT for sending the signal Tci1-C-SYNC is outputted.

Then, when the composite synchronization signal Tci1-C-SYNC as shown in (d) of FIG. 2 is input, the servo system 18 has a response to the first time compression combined signal Tci1 as shown in FIG. When the signal output from the main luminance / color signal separation unit 15 separating the luminance signal and the color signal is recorded, and then the composite synchronous signal Tci2-C-SYNC as shown in FIG. A signal output from the sub-luminance / color signal separation unit 16 that separates the luminance signal and the color signal from the second time compression combined signal Tci2 as in (c) of FIG.

By recording the video signal input to the VC in this manner, it is possible to eliminate the time difference between the video signal to be recorded and the video signal input to the VCAL.

A method of reproducing the video signal recorded in the servo system will be described with reference to FIGS. 4 and 5 as follows.

When the microcomputer 27 provides the reproducing servo control signal to the servo system 21, the servo system 21 supplies the luminance signal Y and the color signal C to the main and sub-luminance / color signal combiner 22 ( 23) respectively.

Then, the main luminance / color signal synthesizing unit 22 separates the luminance signal and the color signal for the main screen from the luminance signal and the color signal provided from the servo system 21, and separates the luminance signal and the color signal for the separated main screen. The first time compression combined signal Tci1 for reproduction as shown in FIG. 5A is synthesized and output to the first composite synchronous signal generator 24 and the demultiplexer 26. FIG.

The sub-luminance / color signal synthesizing unit 23 separates the luminance signal and the color signal for the sub-screen among the luminance signal and the color signal provided from the servo system 21, and separates the luminance signal and the color signal for the separated sub-screen. By synthesizing, a second time compression combined signal Tci2 for reproduction as shown in FIG. 5 (b) is generated and output to the second complex synchronous signal generator 25 and the demultiplexer 26. FIG.

Accordingly, the first composite synchronous signal generator 24 receives the first time-compression combined signal Tci1 for reproduction output from the main luminance / color signal combiner 22 and its complex synchronous signal Tci1-C-SYNC. And output the demultiplexer 26 to the demultiplexer 26, and the second complex synchronous signal generator 25 receives the second time-combined combined signal Tci2 outputted from the sub-luminance / color signal combiner 23. A signal Tci2-C-SYNC is generated and output to the demultiplexer 26.

120 ° after the first time compression combined signal Tci1 for reproduction shown in FIG. 5A is generated, the second time compressed combined signal Tci2 for reproduction shown in FIG. 5B is generated. After the second time compression combined signal Tci2 for reproduction is generated, the first intercompressed combined signal Tci1 for reproduction appears 60 ° later.

The demultiplexer 26 demultiplexes the first and second time-combined combined signals Tci1 and Tci2 for reproduction provided by the main and sub-luminance / color signal combiners 22 and 23 to output a luminance signal. (Y) and the color signal (C) are separated and output to the combining section (28).

Then, the combining unit 28 synthesizes the luminance signal Y and the color signal C to generate an image signal, and outputs the image signal as shown in FIG.

However, as shown in FIG. 5B, after the second compression-combined signal Tci2 for reproduction is generated, the video signal is output after a time delay such as α as shown in FIG. 5C.

Since the servo system 21 is based on the first time compression combined signal Tci1, the regeneration servo control signal should be made equal to the first time compression combined signal Tci1.

Therefore, the demultiplexer 26 transmits the reproducing servo control signal to the microcomputer after 60 ° -α after the synchronizing signal of the output video signal shown in FIG. 5 (c) is generated as shown in FIG. 5 (d). 27).

Then, the regenerative servo control signal coincides with the first time combined signal Tci1.

Therefore, the microcomputer 27 uses the regenerative servo control signal transmitted from the demultiplexer 26 to the servo system 21 as the complex synchronization signal Tci1-C-SYNC of the first time combined signal Tci1. Then, after 120 °, the composite synchronization signal Tci2-C-SYNC of the second time compression combined signal Tci2 is generated.

Therefore, the servo system 21 reproduces and outputs the signals recorded by the composite synchronization signals Tci1-C-SYNC and Tci2-C-SYNC transmitted from the microcomputer 27.

Since the composite synchronous signal of the output video signal is the same signal as the jitter-free standard video signal in high-definition digital VR, it is possible to enjoy the jitter-free image quality by generating the regeneration servo replay signal based on this.

Therefore, the present invention uses the composite video signal of the video signal input or output when recording or reproducing the video signal from the V-Cal to use as a reference signal, such as a standard video signal, to enjoy jitter-free clean picture quality. It is possible to eliminate the time delay between the video signal input to the video signal, the video signal to be recorded and the video signal reproduced from the video signal and the video signal output to the outside.

Claims (2)

A synchronous separator for separating the composite synchronous signal by receiving the video signal inputted by V-Cal, a luminance / color signal separator for separating the luminance signal and a color signal from the image signal, and separating the luminance / color signal separator from the video signal. A color decoder that receives the received color signal and generates a color difference signal, and generates and outputs a first and second time-combined combined signal by time-compressing the complex synchronous signal, the luminance signal, and the color difference signal outputted from the respective units. A multiplexing unit for generating and outputting a head switching signal of a head for recording a time-compression combined signal, and checking the presence or absence of an input signal by receiving a composite synchronization signal output from the synchronous separation unit, and outputting the head from the multiplexing unit if there is an input signal. Do not output the servo control signal to enable the first and second time compression combined signal to be written to the servo system using the switching signal. A microcomputer, a main luminance / color signal separation unit separating the luminance signal and the color signal of the main picture from the first time compression combining signal output from the multiplexer, and a second time compression combining signal output from the multiplexing unit And a sub-luminance / color signal separation unit for separating the luminance signal and the color signal of the sub-screen, and a servo system for recording the signals output from the main and sub luminance / color signal separation units according to the servo control signal of the microcomputer. High-definition digital VR recorder. A main luminance / color signal synthesizing unit for separating the main picture from the luminance signal and the color signal output from the servo system, and using the separated signal to create a first time combined signal, and a sub-screen from the luminance signal and the color signal. A sub-luminance / color signal synthesizing section for separating a dragon and generating a second time compression combining signal using the separated signal, and receiving the first time compression combining signal output from the main luminance / color signal combining unit and compressing the first time. A first composite synchronous signal generator for generating and outputting a composite synchronous signal of a combined signal, and receiving and outputting a second synchronous compression signal output from the sub-luminance / color signal combining unit to generate and output the composite synchronous signal of the second time compression combined And a luminance signal and a color signal which are separated from each other by receiving a second composite synchronous signal generator, and the first and second time-combined combined signals outputted from the respective units and their composite synchronous signals. A demultiplexer for outputting and outputting a composite synchronous signal for reproduction, a microcomputer for generating and providing a servo control signal to the servo system by using a composite synchronous signal for reproduction output from the demultiplexer, and the demultiplexer. And a synthesizer for synthesizing a luminance signal and a color signal output from the unit to generate an image signal.