JPH0271689A - High definition video disk player - Google Patents

Abstract

PURPOSE:To obtain a high definition video disk player by providing a means reproducing simultaneously 1st and 2nd video signals recorded on the same or other disks and a means synthesizing both signals and decoding a video signal with high definition. CONSTITUTION:The same reference code generator 111 is used for the reproduction of a video disk 101a and a digital audio disk 101b and the synchronizing operation is attained. A detection circuit 116 discriminates information whether it is audio information or high definition information given to the disk 101a. In the information is the audio information, a switch 118 gives reproduction information to a DA converter and an analog signal is sent a terminal B and in the latter case, high definition information is added to the reproduction signal of the disk 101a at a synthesis circuit 121 via a buffer memory 119 and a decoder 120 and the result is sent to a terminal A and a high definition picture is decoded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device suitable for reproducing IP, etc. high-definition images on a video disc player.

[Conventional technology]

A transparent disc with a recording surface and a reflective film inside? Reflective optical discs are used in video disc players (also known as laser disc players) and digital discs. It was put into practical use as an audio disc player (commonly known as a compact disc), and has an important position in the industry.

Furthermore, a video disc player based on a high-visibility system has been proposed in order to provide higher quality images than the conventional laser vision system using a reflective optical disc. (For example, TV Television Society Technical Report VR
, 75-8, Sho 6t5 announcement.

In this case, as is well known, the high-visibility system is a completely different system from the conventional television system, so the high-definition type 1 video disc is not compatible with the laser vision type 1 video disc. , and the players are also different.

Also, JP-A-61-127541 f JP-A-60-19
Another method is proposed in No. 7937.

These are also not compatible with the laser business model mentioned above.

[Problem that the invention seeks to solve]

However, as mentioned above, laser video discs and players are already in widespread use, and supplying new video discs and players of a different format to the market will cause confusion in the market. What is the special feature of the video disc system that not only attracts people but also allows them to provide video software to gluttons at low prices? This may cause damage and hinder the further spread of the video disc system.

-10,000 videodisc system has higher quality images? Naturally, there is a strong demand in the market to provide such a system, and for the reasons mentioned above, it has been desired to develop a system and device that are upwardly compatible with the conventional laser vigilance system.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that satisfies the above-mentioned requirements, is compatible with a set of laser vigilances, and is capable of providing reproduced images of higher quality.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a means for reproducing a video disc using a laser vision system, and a second video signal included in the high definition information 1 of the video signal recorded on the video disc. Is there a way to play Japanese-style video discs at the same time? In addition, the high-definition information? , means for synthesizing the reproduced video signal of the video disc to restore a high-definition video signal.

[Effect]

The high-definition information to be added is obtained by compressing data as the remaining information after subtracting the video signal recorded on the laser vigilance video disc from the high-definition video signal. Furthermore, the high-definition report? Convert to signal based on compact disc system L Multiplexing within the same disc or a second disc? make. Alternatively, the high-definition information is converted into a signal based on the laser vision system, and the signal is pasted on the back side of the video disc using the laser vision system, or another disc is created.

Therefore, by adding the second video signal as high-definition information to the video signal reproduced from the laser vision video disc, the original high-definition video signal becomes compatible with the conventional laser vision video disc. Be able to restore it while preserving its originality.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 shows an embodiment of the first invention, in which 101a is a laser video disc of 10,000 types, and 101b is a digital audio disc of 1 compact disc.

Furthermore, 102α and 102b are each disk? The motor to be rotated, 103a and 103b are motor drive circuits, IQ
4a, 10'lb is the original pickup, 105a, 105
Is b the optical pickup? Carriage for transporting, 106
106a and 106b are carriage drive circuits that can simultaneously reproduce the video disc 101G and digital audio disc 101b.

The FM demodulation circuit 107, the time axis correction circuit 108, the synchronization separation circuit 119, the code detection circuit 110, the reference code generator 111, and the coincidence detection circuit 112 are connected to the video disc I.
Q1.4 is reproduced to obtain a video signal in the same format as a television broadcast, such as the NTSC system, and sent from terminal A, and is the same as a conventional video disc player. The EFM demodulation circuit 113, the synchronization separation circuit 11, the error correction circuit 115, the subcode detection circuit 116, and the coincidence detection circuit 117 reproduce the digital audio disc IQ1b and obtain digital data. , these are also no different from conventional digital audio disc players, and there is no need to explain their detailed operations here.

Furthermore, the signal switching circuit 122 selects the video disc 101α as a signal to be supplied to the EFM demodulation circuit 113.
The playback signal of the digital audio disc 101b
Select one of the 10,000 playback signals. That is, it is possible to multiplex and record a compact disc format signal on the low range of the video signal on the video disc 101a, and to record the additional high-definition LIT? described below. information data to the video disc IQi.

You can also record the number of times. At this time, the digital audio disk 1011), the motor 102b,
The motor drive circuit 103b, the original pickup 104b, and the carriage drive circuit 106b are not necessarily required.

This embodiment differs from conventional video disc players and digital audio disc players in that the basic code generator 111 is used to play back the video disc 101 (digital audio disc 101b).
The same code may be used when reproducing the code, and any one of the ten thousand reproduction codes may be used as the reference code, provided that synchronized operation is possible. Furthermore, the changeover switch 1
18, a buffer memory 119, and a decoder 12o1 synthesis circuit 121.

To explain in more detail, the subcode detection circuit 116 is
It is determined whether the signal stream being generated is audio data or high ellipse #ll1 signal data to be added to the video image number 1 of the video disc 1014, and if the result is the former, the switch is made. The switch 118 converts the playback data into A (not shown) and sends it out as a digital audio signal from the terminal B. If it is the latter, the playback data is transmitted to the buffer memory 119.

Information about high quality video signals is stored in the buffer memo 111.
9, decoded by a decoder 120, and synthesized by the synthesis circuit 12.
1, high-definition information is added to the reproduced video signal of the video disc 101a? Add it, send it to terminal A, and send it to terminal A.
! ? Make it possible to restore. Of course, the signal format sent from the terminal λ may be a so-called composite format such as the above-mentioned NTSC system, or may be the R%G, 13% Konbonen ha system, and is not limited to either.

Is Figure 2 a high-definition video signal? , NT8C, etc., and the remaining high-definition report, and further convert the high-definition report into the same signal format as the compact disc.

201 is a sampling circuit, 202 is an IAJ elementary separation circuit, 203 is an interpolation filter, 204 is an NTSC encoder, and 205 is an FMKvt4 device. A color difference signal is input, and a recording signal for producing a laser video disc is output from terminal 1). Output to. Further, 206 is a differential circuit, 207 is an absolute value circuit, and 208
is an intra-block integration circuit, 209 is an additional block determination circuit, 210 is a mix circuit, 211 is a quantizer/encoder, 2
12 is a buffer memory, 213 is a CD modulator, and 214 is a color processing circuit.

The sampling circuit 201 performs high-density sampling of the luminance signal from the terminal C1 to ensure a band that is approximately twice as large as that of the NTSC signal.
The sampled pixels are separated into basic pixels that can at least guarantee a band that can be transmitted as an NT8C signal, and the remaining additional pixels. As an example of the pixel separation, W
As shown in the cS diagram, each pixel is alternately separated into a basic pixel and an additional pixel, or as shown in Figure 4, the basic pixel is used as a scanning line, or the sampling is performed in an offset structure for each frame period. Examples include.

The interpolation filter 203 is an LP to avoid aliasing errors.
F, the output of the interpolation filter 203 and the additional pixel are compared, and the difference data is obtained by the difference circuit 206. As is well known, the means to obtain the difference data is based on the correlation between horizontal pixels, between scanning lines, or between frames. It is preferable to set the absolute value of the difference data to be the smallest.As a result, the amount of data generated can be minimized and more detailed information can be recorded as additional information. In addition, the intra-block integration circuit 208 is
The sum of absolute values of the difference data of additional pixels within a block whose size is determined in advance (the minimum size of a block is 1 pixel) is calculated, and in the additional block determination circuit 209, the sum of absolute values is stored in a buffer memory to be described later. Determine whether it is larger or smaller than the control threshold based on the size of the storage area of 212,
The difference data is sent to the mix circuit 210 as a significant additional block only when it is large. mix circuit 210
The additional high-definition report data of the color difference signal obtained through the same processing as described above is also supplied from the color signal processing circuit 214, the additional data of the luminance signal and the color difference signal are mixed, and the data is sent to the next stage. It is sent to the quantizer/encoder 211. Of course, it is also possible to track only one of the luminance signal and color difference code as the high-definition signal. The encoder/encoder performs two further data compression operations using well-known data compression techniques such as non-line quantization and variable length encoding, and then performs two further data compression operations via the buffer memory 212, L and M buffer memories 212.
The transmission speed of compact disc format (t4Mb) is
ps), and in the CD modulator 213, the CD modulator 213 has the same size and the same signal format as the compact disc.
Addition of high-definition image signals Recording of high-definition report data 1.
- Create a disc.

As a result, it is not only possible to play back LaserVision Manshiki video discs and compact disc format digital audio discs as before, but also play back discs on which the additional high-definition data has been recorded at the same time as video discs. This makes it possible to restore high-definition images.

FIG. 5 shows an embodiment suitable for the basic pixel sampling structure shown in FIG. 4. Components having the same functions as the embodiment shown in FIG. In the embodiment, an interpolation filter 501 and a motion detection circuit 502 are used side by side.

The basic pixel sampling structure shown in Fig. 4 is an offset sampling structure, and for images with little movement, such as a static thIi17 image, a high-definition image is obtained using a total of 4 fields of basic pixels. can be restored. In this case, the high-definition broadcast data to be added is limited to when there is movement, and the motion detection circuit 502 performs the motion detection, and when there is no movement, the interpolation filter 501 supplements pixels between frames. If there is movement, pixel replenishment is performed using the reproduction data of the disk 101b on which the additional high-definition report data is recorded, thereby making it possible to restore an even higher-definition image.

Next, a third embodiment will be described using FIGS. 6, 7, and 8. In this embodiment, a disk having the same dimensions as the Laser Visibility layer and an open track in a reverse spiral is used as the disk for recording the additional height at* information. pasted together.

Play both sides at the same time and restore high-definition images. The large f! ! A unique feature is that the ability to record additional 7J [+ high-definition news reports] is much greater than that of the @1 embodiment, and this embodiment has a scanning line density that is approximately twice that of the conventional television system. It is possible to restore even hidden (1050 or 1125 lines) high-definition image signals.

-An example will be explained with reference to FIGS. 7 and 8. In FIG. 7, (Ill is given the scanning line of the original signal. al, bl
, cl, . . . 91 are the scanning lines of the first field and α
2, b2, C2, . . . f2 indicate scanning lines of the second field, which are interlaced between fields.

From the nuclear source signal, in the first field, the sum signal of two scanning lines is used as a new scanning H signal, and in the second field, each line is thinned out to become a new scanning # signal, for example, NTSC.
A signal having the same scanning line structure as that of the conventional method is created, and as a signal that is completely compatible with the conventional method, it is used as the A side of the disc as shown in FIG. Also, the opposite side of the disc (
On side B).

Both the first and wJ2 fields are recorded as difference signals between scanning lines, as shown in FIG. (In this case as well, the scanning line structure is the same as that on side A.)
As shown in FIG. 1b+, the component of the difference signal is multi-recorded as only the low-frequency component of the brightness signal, and the high-frequency signal of the signal recorded on the A side is also multiplexed to increase the horizontal height of the image. Record detailed reports. Additionally, the additional high-definition information of the color difference signal is
A signal having the same format as that of the compact disc generated in the same manner as shown in FIG. 2 is frequency-multiplexed on the low frequency side of the B-side disc as shown in FIG. 8, 1b+.

Figure 6 shows an embodiment of an apparatus suitable for playing back discs produced by the method described above, and parts having the same functions as the first embodiment shown in Figure 1 are designated by the same numbers. It is attached.

The original pick pine 11050% carriage 104C is provided for reproducing the B side of the disc. In addition, the reproduced signal from the B side is separated into a horizontal high frequency component and a difference signal for interpolating the scanning line by a signal separation circuit 604 via an FM demodulation circuit 602 and a time axis correction circuit 603. Additional high-definition information data is obtained by decoders 605a and 605b. The data is sent to the NTSC decoder 60
The brightness signal of the disk A side obtained in step 6 is supplemented by a high frequency synthesis circuit 607 and a scanning line conversion circuit 608, respectively, and is sent out from a terminal F1.

Furthermore, the additional high-definition information data of the color difference signal is sent to the EFM demodulation circuit 113, the error correction circuit 115, and the buffer memory 1.
19, obtained by the decoder 120 and the NTSC decoder 6
The color difference signal from 06 is supplemented by a color difference high frequency synthesis circuit 601 to achieve high definition. The high-definition color difference signals are sent out from terminals F2 and F5.

As explained above, the fifth embodiment is compatible with the conventional LaserVisi 70,000-type video disc as long as side A of the disc is played back.

Furthermore, if the direction of the spiral is reversed between sides A and B, a means may be provided to detect this and notify the user of the device that the device has been inserted incorrectly, or
Two original pickups 105a.

The combination of the 105c and the subsequent signal processing section is automatically switched, and the disk can be inserted in either direction.5
It is also possible to further improve usability.

Furthermore, it is clear that the same effect of playing back sides A and B at the same time as explained in the example can also be obtained by a device that can play two separate laser vision video discs at the same time. .

Further, in the first, second, and third embodiments, the case where the NTSC system is used as the laser vision system video disc has been described, but the present invention is also applicable to video discs of the PAL system and the like.

Furthermore, there are capacitive video discs in addition to laser video discs.
It goes without saying that the present invention can be applied to video discs of these types as well.

[Effects of the Invention] As explained above, according to the present invention, it is possible to reproduce high-definition video signals while maintaining complete compatibility with conventional laser vision video discs.

Furthermore, if you want to record additional high-definition information in the same format as the compact disc, no new disc playback device is required; ! The high-definition video signal can be reproduced simply by adding a tortoise-cut solder circuit.

[Brief Description of the Drawings] Fig. 1 is a block diagram of a first embodiment of the present invention, Fig. 2 is a block diagram of an apparatus for obtaining additional high-definition report data, and Fig. 3 is a block diagram of a device for obtaining additional high-definition report data.
Figure 4 shows additional high-definition information data 213...CDi
Controller, 502...Motion detection circuit. FIGS. 7 and 8 are explanatory diagrams of a method for obtaining additional high-definition news data from a high-definition video signal having about twice as many strike lines. IQl...Video disk, 101b...Digital audio disk, 110...Code detection circuit, 112.117...Coincidence detection circuit, 116...Subcode detection circuit, 119.212...Buffer Memory, 120...decoder.

Claims (1)

[Claims] 1. means for simultaneously reproducing a first video signal and a second video signal recorded on the same or different disks; and a means for synthesizing the first video signal and the second video signal to generate a high A high-definition video disc player comprising means for restoring a high-definition video signal.