KR100203245B1 - Video recording/reproducing device and track structure usable finished/general quality video in common - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for recording and reproducing high quality video signals. The present invention is compatible with a VHS (Video Home System) standard recording and reproducing apparatus for recording and reproducing video signals with general image quality. High-definition by separating and recording high-frequency component signals to reduce the burden on users, and to record and play back high-definition video signals by using ordinary VHS tapes, which are less expensive than S-VHS Tape. A device and track structure are provided.

Description

High-definition / general-quality video recorder and track structure

1 is a block diagram showing a recording system of a high-definition / general image combined video recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a playback system of a high-definition / general-resolution combined video recording and reproducing apparatus for reproducing a signal recorded in a high-quality mode in the apparatus of FIG.

3 is a conceptual diagram for explaining the structure of a track recorded in the high quality mode in the apparatus of FIG.

4 is a conceptual diagram for explaining the structure of a track when a signal recorded in a high quality mode is reproduced in a normal mode.

* Explanation of symbols for main parts of the drawings

11: luminance / color signal separator 12: band separator

13,45: luminance signal processing unit 14,47: color signal processing unit

15,49,65: 1st, 2nd, 3rd mixing unit 16: Record amplifier

17: recording head 20,50: first and second signal storing means

21,51: low-frequency luminance signal storage unit 23,53: high-frequency luminance signal storage unit

25,55: low frequency signal storage unit 27,57: high frequency color signal storage unit

30,70: 1st, 2nd switching means 31, 33, 71, 73, 75: 1st-5th switching part

41: playhead 43: regeneration amplifier

60: mixing means 61: luminance signal mixing unit

63: color signal mixing unit 80: band mixing means

The present invention relates to a device for recording and reproducing video signals. In particular, the present invention is compatible with a recording and reproducing device of VHS (Video Home System) standard. The present invention relates to a high quality video recording and reproducing apparatus and a track structure capable of realizing high quality open record reproduction.

Recently, as the work to promote digital broadcasting using satellite broadcasting is active, even a conventional VHS (Video Home System) recording / reproducing apparatus can accommodate both a general mode video signal and a high quality video signal. There is a need for a video signal recording / reproducing system. Conventionally, in order to record high quality video signals with a general video signal recording / reproducing system, it was possible to use high quality recording heads and high quality tapes. However, the high price of S-VHS Tape was not easy to use.

Accordingly, an object of the present invention is to divide the low frequency signal and the high frequency signal of a signal to be recorded by dividing a track of a general tape, not a high-definition tape, in order to improve the above point, and to record and synthesize the recorded signal. The present invention provides a high quality video recording and reproducing apparatus for pursuing high quality.

It is another object of the present invention to provide a track structure of a recording / playback apparatus in which the positions of low frequency signals and high frequency signals are recorded on tracks divided into equal parts using azimuth effects between tracks to enable high quality recording.

A feature of the present invention for achieving the above object is a luminance / color signal separator for separating a color signal (C) and a luminance signal (Y) from an input composite video signal (Y + C) in a recording device for recording a video signal. And a band separation unit for receiving the luminance signal (Y) and the color signal (C) separated from the luminance / color signal separation unit and separating the low frequency component and the high frequency component signal by a predetermined reference. First signal storage means having storage portions for storing the low frequency components and the high frequency components of the luminance signal (Y) and the color signal (C), and selecting the output signal from the luminance / color signal separation unit in the general image quality recording mode; First switching means for selecting the outputs of the storage units so that the low-frequency component luminance signal and the color signal are synchronized with each other and the high-frequency component luminance signal and the color signal are synchronized with each other. A signal processing means for receiving a high frequency luminance signal, a low frequency luminance signal, a high frequency color signal, and a low frequency color signal selected by the first switching means, respectively, and processing the signal into a recordable form; and mixing the processed high frequency luminance signal and the high frequency color signal, and mixing the low frequency luminance signal. And a video recording means for mixing a signal and a low frequency signal, and a video recording means for converting the mixed video signal into a recording form and recording the result in a recording medium.

A feature of the present invention for achieving the object of the present invention is an apparatus for reproducing a video signal recorded on a recording medium, the video signal reading unit for reading a video signal recorded in the high-definition mode state on the recording medium, the video A luminance signal processor for dividing a signal into a luminance signal of a low frequency component and a luminance signal of a high frequency component, a color signal processor for separating the video signal into a color signal of a low frequency component and a color signal of a high frequency component, and a temporal low frequency signal component and a high frequency signal component There is provided a high-definition / general-definition picture reproducing apparatus including a band mixing means for mixing separated luminance signals and color signals to be restored to original signals.

In addition, another feature of the present invention is a track structure of a high-definition / general-purpose recording and reproducing apparatus, in which the track width of the tape is divided into two, and each of the two divided tracks has a low frequency component signal and a high frequency component signal. It is to provide a track structure of a high-definition / general definition combined recording and reproducing apparatus, characterized in that the track structure is recorded alternately for each field.

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

1 is a block diagram showing a recording system of a high quality image recording and reproducing apparatus of the present invention. The high definition image recording / reproducing apparatus separates the color signal (C) and the luminance signal (Y) from the input composite video signal (Y + C), and the luminance signal (Y) and the color signal (C) are input as they are. And a luminance / color signal separator 11 to pass therethrough. The band separating unit 12 receives the separated luminance signal Y and the color signal C, and separates the signals into the signals of the low frequency band and the high frequency band and outputs them to the first signal storage means 20. The first signal storage means 20 is a low-frequency luminance signal storage unit 21, a high-frequency luminance signal storage unit 23, which serves as a buffer for temporarily storing the low frequency components and the high frequency components of the luminance signal Y and the color signal C. ) And a low frequency color signal storage section 25 and a high frequency color signal storage section 27. The first switching means 30 is composed of a first switching unit 31 and a second switching unit 33, in accordance with the switching control signals (S1, S2) of the control unit not shown in the figure 11 and the signals output from the storage units 21, 23, 25, and 27 are selected at predetermined intervals and transmitted to the luminance signal processor 13 and the color signal processor 14. The first mixing unit 15 receives the luminance signal and the color signal signal-processed from the luminance signal processing unit 13 and the color signal processing unit 14 and mixes the two signals. The recording amplifier 16 receives the mixed signal and delivers the mixed signal to the recording head 17. The recording head 17 records the video signal converted into the recording form on the recording medium.

Before describing the recording system of the high definition image recording and reproducing apparatus which is the apparatus of the present invention, the video signal recording operation in the general image quality mode will be briefly explained. The luminance / color signal separation unit 11 receives the composite video signal Y + C to separate the luminance signal Y and the color signal C, and the luminance signal Y and the color signal C which are already separated and input are Pass it through and print it out. The signal output from the luminance / color signal separation unit 11 (Y, C) is applied to the first switching means 30, so as to select the output signal of the general image quality mode of the controller not shown in the drawing. 2 are selected according to the switching control signals S1 and S2 (a, a1) and applied to the luminance signal processing section 13 and the color signal processing section 14, respectively. The luminance signal processing unit 13 and the color signal processing unit 14 convert the signals so that the applied signals can be recorded in an optimal state on the recording medium. The first mixing unit 15 receives the converted luminance signal Y and the color signal C and mixes the two signals so that they can be recorded simultaneously. The recording amplifier 16 is connected to the front end of the recording head 17 to allow sufficient current to flow through the recording head 17. The recording head 17 records the thus converted video signal on the recording medium.

Now, the recorder in the high quality mode of the high quality image recording and reproducing apparatus applied to the present invention will be described. Here, the description of the operation of the luminance / color signal separation unit 11, which is redundant in the description of the recording operation of the recording / reproducing apparatus operating in the above-described general mode, will be omitted. The band separator 12 separates and outputs a low frequency component and a high frequency component among the signals input from the luminance / color signal separator 11. Each of the storage units 21, 23, 25, and 27 constituting the first signal storage unit 20 may include the high frequency and low frequency components of the luminance signal Y and the color signal C separated from the band separator 12. The time base is compressed and stored in each signal storage unit. The signal stored in the signal storage unit as described above is a signal obtained by compressing a signal for one field of the video signal on the time axis. The first switching unit 31 and the second switching unit 33 respectively store the storage units 21, 23, and 25 according to the first and second switching selection signals S1 and S2 applied from a controller not shown in the drawing. And switching control for time multiplexing the signals stored and compressed in " 27 ". Here, the switching control for time multiplexing is to synchronize the low-frequency component luminance signal and the color signal with each other and the high-frequency component luminance signal and the color signal with each other. That is, a signal is selected according to the switching control signal in order to alternately record a signal of a high frequency component and a signal of a low frequency component on a recording medium. The first switching unit 31 and the second switching unit 33 select the outputs of the contact b and the contact b1 when the switching control signal for selecting the low frequency signal is applied from the controller (not shown). In addition, when a switching control signal is applied to select a high frequency signal, the output of the contact c and the contact c1 is selected. The luminance signal processing unit 13 connected to the output terminal of the first switching unit 31 receives a luminance signal of a low frequency or high frequency component and converts the signal so that the recording medium can be optimally recorded on the recording medium. The color signal processing unit 14 is connected to the second switching unit 33 and receives a low frequency or high frequency color signal like the luminance signal processing unit 13 to convert the signal. The first mixing unit 15 receives the output signal of the luminance signal processing unit 13 and the output signal of the color signal processing unit 14 so that the luminance signal and the color signal can be simultaneously recorded using one recording head 17. Synthesize the signal. The synthesized signal is recorded in a predetermined recording area on the recording medium through the recording amplifier 16 via the recording amplifier 16. The reproduction operation of the high definition image recording and reproducing apparatus of the present invention for reproducing the signal recorded in the high definition mode will be described with reference to FIG.

2 is a configuration diagram showing a reproduction system of a high quality image recording and reproducing apparatus for reproducing a signal recorded in the high quality mode in the apparatus of FIG. The high definition image recording and reproducing apparatus includes a reproducing head 41 which reads out an image signal recorded on a recording medium. The signal read out from the reproduction head 41 is input to the reproduction amplifier 43 to perform band separation. The signals separated into bands by the luminance signal and the color signal are input to the luminance signal processing unit 45 and the color signal processing unit 47 and synthesized by the second mixing unit 49. The band mixing means 80 is connected to the output terminals of the luminance signal processing unit 45, the color signal processing unit 47, and the second mixing unit 49. The band mixing means 80 includes a second signal storage means 50 serving as a buffer for temporarily storing low and high frequency luminance signals and color signals, and mixing means 60 for mixing respective luminance signals and color signals. And second switching means 70 for selectively outputting a signal applied according to the third, fourth and fifth switching selection control signals S3, S4 and S5 of the control unit. The second signal storage unit 50 includes a low frequency luminance signal storage unit 51, a high frequency luminance signal storage unit 53, a low frequency signal storage unit 55, and a high frequency color signal storage unit 57. The mixing unit 60 includes a luminance signal mixing unit 61 and a color signal mixing unit 63 for synthesizing by receiving luminance signals and color signals having different frequency bands, respectively. The second switching means 70 switches the case of reproducing the video signal recorded in the general image quality mode and the video signal recorded in the high quality mode. That is, in accordance with the third switching selection control signal S3, the luminance signal (contact a2) of the general image quality mode, which is the output of the luminance signal processing unit 45, and the luminance signal of the high quality mode, which is the output of the luminance signal mixing unit 61, (contact) and a third switching section 71 for outputting d) and outputting the output of the second mixing section 49 (contact point e) and the output of the third mixing section 65 (contact point f) to the fourth switching selection control signal. A fourth switching unit 73 is selected according to S4 and outputs a composite video signal Y + C. Further, the second switching means 70 controls the fifth signal for controlling the color signal (contact point g) of the high quality mode which is the output of the color signal mixing unit 63 of the color signal (contact point a3) of the general image quality mode, which is the output of the color signal processing unit 47. And a fifth switching unit 75 which selects according to the signal S5 and outputs the color signal C.

First, before the operation of reproducing a signal recorded in the high quality mode in the apparatus of the present invention, the operation of reproducing recorded in the general quality mode will be briefly described. The video signal recorded in the normal mode on the recording medium is read out through the reproduction head 41. The reproduction amplifier 43 separates the band of the read signal into a luminance signal and a color signal. The luminance signal processor 45 and the color signal processor 47 convert the applied luminance signal Y and the color signal C into image signals. The second mixing unit 49 mixes the luminance signal and the color signal to output the composite image signal Y + C to the fourth switching unit 73 in order to output in the general image quality mode. In addition, signals recorded separately from the luminance signal Y and the color signal C are recorded in the third and fifth switching control signals S3 and S5 by the third switching unit 71 and the fifth switching unit 75, respectively. Are selected and output as the luminance signal Y and the color signal C, respectively.

Now, the operation of the high definition mode reproduction system of the high definition image recording and reproducing apparatus of the present invention will be described in detail. Here, the operation descriptions of the reproduction amplifier 43, the luminance signal processing unit 45, the color signal processing unit 47, and the second mixing unit 49, which are duplicated in the reproduction operation description of the image recording and reproducing apparatus operating in the above-described general mode, I will omit it. The band mixing means 80 is connected to the output terminals of the luminance signal processing unit 45, the color signal processing unit 47, and the second mixing unit 49. The band mixing means 80 performs an operation of restoring a signal recorded by separating the low frequency component and the high frequency component into an original signal. The second signal storage means 50 constituting the band mixing means 80 receives the low frequency component and the high frequency component of the luminance signal Y and the color signal C, respectively, and the low frequency luminance signal storage unit 51 and the high frequency luminance signal. The storage unit 53, the low frequency signal storage unit 55, and the high frequency color signal storage unit 57 are respectively stored and then output to the mixing means (60). The luminance signal mixing section 61 constituting the mixing means 60 synthesizes the luminance signals of the low frequency component and the high frequency component and restores them to the original input luminance signal Y. The color signal mixing unit 63 synthesizes the color signals of the low frequency band and the high frequency band, restores the original color signal C, and outputs the original color signals. The third mixing unit 65 receives the output of the luminance signal mixing unit 61 and the output of the color signal mixing unit 63, mixes the two signals, and outputs the mixed signals to the second switching means 70. The second switching means 70 comprises the luminance signal mixing section 6, the color signal mixing section 63, and the third in accordance with the high definition proxy, the third, fourth, and fifth switching selection control signals S3, S4, S5. The mixing unit 65 selects and outputs the high-quality luminance signal Y, the color signal C, and the composite video signal Y + C mixed in the high-definition form.

FIG. 3 is a conceptual diagram for explaining the structure of a track recorded in the high quality mode in the apparatus of FIG. 1, and will be described taking VHSS-VCR as an example. Normal picture quality mode, one head records one field per track. However, when recording high quality mode, two heads record one field. As a result, one head records 1/2 field. In other words, during high quality recording, the number of rotations of the head drum is controlled twice to record twice as much as the VHS standard, that is, one track in the VHS standard is divided into two tracks. Here, the video head of the VHS defines an azimuth angle θ of 6 °, and at the same time, the two heads have azimuths (+ 6 °, -6 °) in opposite directions. In the present invention, the heads can record / reproduce the digital signal using the existing head configuration as it is. In Fig. 3, in the embodiment, the track width 58 m of the tape used in the high quality signal processing mode is bisected into 29 m, and each field is divided into two 29 m tracks with a recording head and a low frequency signal and a high frequency signal. Take turns recording each party. The low frequency component signal a and the high frequency component signal b are alternately recorded for each field in order to maintain compatibility with the case of recording in the general image quality mode or recording in the high quality mode.

4 is a conceptual diagram illustrating a case of reproducing a signal recorded in a high quality mode in a general quality mode. Here, since the number of revolutions of the head drum is 1/2 of that of the high quality mode during normal quality mode reproduction, two tracks recorded in the high quality mode are read as one track. Thus, the A 'or B' head with an azimuth angle of 6 ° reads A and B tracks at + 6 ° and -6 ° simultaneously. However, the signal of the high frequency (b) component recorded on the B track of -6 ° has a very small amount read by the azimuth effect. Therefore, the signal recorded in the high quality mode by the above operation can be reproduced in the normal quality mode, thereby showing that the video signal recording and reproduction of the high quality mode and the normal quality mode are compatible.

As described above, the present invention relates to an apparatus for recording and reproducing high quality video signals. The present invention is compatible with the recording and reproducing apparatus of the Video Home System (VHS) standard, and the high-definition tape (S-VHS Tape) can be achieved by pursuing high quality by dividing the track into two parts and separating and recording the low frequency signal and the high frequency signal. It provides a device and track structure for recording and playing back high-definition video signals by reducing the burden on users by using general VHS tape which is cheaper than).

Claims (7)

A recording apparatus for recording a video signal, comprising: a luminance / color signal separator for separating a color signal (C) and a luminance signal (Y) from an input composite video signal (Y + C); A band separation unit receiving the luminance signal Y and the color signal C separated from the luminance / color signal separation unit and separating the signal into a low frequency component and a high frequency component by a predetermined reference; First signal storage means having storage portions for storing the low frequency components and the high frequency components of the luminance signal Y and the color signal C applied from the band separator; The storage unit selects an output signal from the luminance / color signal separation unit in the general image quality recording mode, and synchronizes the luminance signal and the color signal of the low frequency component with each other and the luminance signal and the color signal of the high frequency component synchronize with each other in the high quality recording mode. First switching means for selecting an output of the first switching means; Signal processing means for receiving a high frequency luminance signal, a low frequency luminance signal, a high frequency color signal, and a low frequency color signal selected by the first switching means, respectively, and processing the signal into a form in which it can be recorded; Mixing means for mixing the signal-processed high-frequency luminance signal and the high-frequency color signal and mixing the low-frequency luminance signal and the low-frequency signal; And image recording means for converting the mixed image signal into a recording form and recording the recording image onto a recording medium. 2. The apparatus of claim 1, wherein the first signal storage means comprises: a low frequency luminance signal storage unit configured to compress and store a low frequency component of a luminance signal separated by the band separator; A high frequency luminance signal storage unit for compressing and storing the high frequency components of the luminance signal separated by the band separator in time-base compression; A low frequency signal storage unit for compressing and storing the low frequency components of the color signal separated by the band separation unit in a time base; And a high frequency color signal storage unit for storing the high frequency components of the color signal separated by the band separation unit by time-base compression. The low frequency component luminance signal and the high frequency component luminance signal according to claim 1, wherein the first switching means determines the luminance signal of the low frequency component and the luminance signal of the high frequency component in accordance with a switching control signal for time multiplexing the luminance signal of the low frequency component and the high frequency component that are time-base compressed. First selection means for alternately selecting at time intervals; And second selection means for selecting an output signal from the low frequency signal storage and an output signal from the high frequency color signal storage at predetermined intervals to coincide with a selection point of the first selection means. General picture and video recording device. An apparatus for reproducing an image signal recorded on a recording medium, comprising: an image signal reading unit for reading an image signal recorded in a high quality mode on the recording medium; A luminance signal processor for separating the image signal into a luminance signal of a low frequency component and a luminance signal of a high frequency component; A color signal processor for separating the image signal into a color signal of a low frequency component and a color signal of a high frequency component; And a band mixing means for mixing the luminance signal and the color signal separated into the low frequency signal component and the high frequency signal component in time so as to be restored to the original signal. 5. The apparatus of claim 4, wherein the band mixing means comprises: second signal storage means serving as a buffer for temporarily storing luminance signals and color signals of the low frequency component and the high frequency component; Mixing means for mixing the luminance signals of the high frequency component and the low frequency component output from the second signal storage means, and mixing the color signals of the high frequency component and the low frequency component; And second switching means for selectively outputting a video signal of a high quality mode applied from the mixing means and a video signal of a general picture quality mode applied from the video signal processing means according to a switching control signal. General picture and video playback device. The image signal reading unit according to claim 4, wherein the image signal reading unit reads the bisected tracks into one track at the same time with a head having a predetermined azimuth angle when the signal recorded in the high quality mode is reproduced in the general image quality mode. High-definition / general picture combined video playback device characterized in that the playback. In the track structure of the high-definition / general-purpose recording and reproducing apparatus, the track structure of the tape is divided into two, and the track structure in which the low frequency component signal and the high frequency component signal are alternately recorded by each field through the recording head in each of the two divided tracks. A track structure of a high-definition / general definition combined recording and reproducing apparatus, characterized in that.