JPH02224485A - Video signal recording system - Google Patents

Abstract

PURPOSE:To attain the reproduction with the reproduction system of the existing television reproduction system by dividing one picture by the high definition television system into plural pictures by the existing television system, recording the pictures onto plural recording media and reproducing the plural recorded picture with plural receivers of the existing television. CONSTITUTION:An A/D converter section 1 converts an inputted High Vision signal into a digital data in 8-bit by using a clock phi1 (e.g. 48.6MHz). Then 12 sets of horizontal scanning data for one picture stored in 12 sets of 1H memories H11-H34 are outputted to a D/A converter section 6, converted into a video signal of the NTSC system, outputted to video disk recorders R11-R34 being components of a recording section 6 and recorded on a video disks VD11-VD34. The 12 sets of the video disks VD11-VD34 are reproduced simultaneously by 12 sets of video disk players and displayed simultaneously on 12 sets of MTSC receivers thereby enabling the high definition picture by the High Vision system to be reproduced by the NTSC system receiver.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides video signals based on high-definition television system,
Regarding the video signal recording method that converts the video signal into a video signal according to the current television system and records it on a recording medium, in particular, one screen of the high-definition television system is divided into multiple screens of the current television system, and each divided screen is The images of the high-definition television system can be played back on current television receivers while maintaining their high quality by recording them on multiple recording media and playing them synchronously on multiple current television receivers. It is something to do.

[Conventional technology]

As a new television system to replace the current television system, high-definition television not only improves picture and sound quality, but also produces advanced visual psychological effects such as a sense of realism and power that far exceeds that of the current television system. The John method, for example, the Hi-Hishon method, has been proposed.

Since the high-definition system differs significantly from the current television system, such as the NTSC system, in screen format, scanning system, audio system, etc., it is not possible to reproduce the high-definition signal as it is using a receiver based on the current NTSC system. For this reason, it has been proposed to absorb the differences in the number of effective scanning lines, aspect ratio, field frequency, etc. between the two systems and convert the high-definition system signal into an NTSC signal for display.

Figure 5 (a) and (c) are high-definition/NTSC
A diagram showing an example of an output image of a converter (down converter).
Figure (a) shows that the 1035 effective scanning lines of the high-definition system are halved and allocated to 483 effective scanning lines of the NTSC system, and 10% of pixels on the left and right sides of the image are deleted, resulting in an aspect ratio of 4 for the NTSC system image. :NTSC without changing 3
In this mode, you can select any part to be deleted in the output mode.

In addition, figure (b) shows the effective scanning line 1035 of the high-definition system.
The book is reduced to about 1/3 and allocated to 483 effective scanning lines of the NTSC system, and the aspect ratio of the high-definition system image is 1.
In this mode, NTSC output is obtained without changing the 6:9 ratio, and 10% of the effective scanning lines on both the top and bottom of the west side are black, and the horizontal direction matches that of a high-definition screen.

[Problem to be solved by the invention]

In the conventional method of converting a high-definition signal to an NTSC signal and displaying it, the number of horizontal scanning lines of the high-definition signal is reduced and the signal is converted to an NTSC signal, making it difficult to reproduce high-quality images using the high-definition method. Moreover, in a conversion mode that cuts part of the image, it is inconvenient that the image with the intended composition cannot be obtained in high-definition.

The present invention provides video signals based on the high-definition television system,
The purpose is to convert the video signal into a video signal according to the current television system and record it on a recording medium while maintaining its high quality, and to reproduce the recorded video signal using a receiver according to the current television system.

[Means to solve the problem]

The video signal recording method according to the present invention converts the number of horizontal scanning lines of a video signal according to a high-definition television system to M times the number of horizontal scanning lines of a video signal according to a current television system, and The converted video signal is divided vertically into M and horizontally into N, and each of the M×N divided video signals is divided and recorded on M×N recording media.

When converting a high-definition system to an NTSC system, convert the number of horizontal scanning lines in the high-definition system to three times the number of horizontal scanning lines in the NTSC system, and then divide the horizontal scanning line into three vertically and four horizontally. Divide this divided 12
(=3x4) sets of video signals are divided and recorded on 12 recording media, respectively.

[For production]

The present invention will be described in detail with reference to the screen configuration diagram shown in FIG. In the following description, a high-definition system is applied as a high-definition television system, and an NTSC system is applied as a current television system to the present invention.

As shown in Figure 1 (a), the basic format of high-definition is that the number of horizontal scanning lines in a frame with an aspect ratio of 16:9.1 is 1125, of which the effective screen that appears on the actual screen is The number of horizontal scanning lines is 1035.

On the other hand, in the NTSC system, as shown in Figure 1 Φ), the number of horizontal scanning lines in a frame with an aspect ratio of 4 = 3.1 is specified as 525, and the number of horizontal scanning lines in the effective screen is 483. It's a book.

The present invention uses an NTSC system receiver to reproduce high-definition images according to the high-definition system, as shown in FIG. 1(C).
As shown in
The screen is divided into 4 parts horizontally, for a total of 12 parts, and each of the 12 divided screens is played back by a single NTSC receiver. In this way, the aspect ratio of each divided screen is 4:3, so the aspect ratio of the entire screen is 16.
:9, resulting in a screen that matches the aspect ratio of the high-definition system.

In this case, the number of horizontal scanning lines on each divided screen is 525, so to display one image on 12 screens, 1
575 (=525×3) horizontal scanning lines are required. The number of horizontal scanning lines in the high-definition system is 1125, so to increase this to 1575, scanning lines are converted from 5 to 7 horizontal scanning lines.

The first 1/2 of the 1575 horizontal scanning lines obtained in this way
The 525 horizontal scanning lines of 3 are divided horizontally into 4 and are sequentially allocated to the upper 4 screens #11 to #14, and in the same way, the next 525 horizontal scanning lines of 173 are divided into 4 horizontally and allocated to the 4 middle screens #21 to #14.
24 and the last 173 horizontal scan lines 525
Allocate books sequentially to 400 pages #31 to #34 in the lower row. Each screen thus assigned is recorded on a recording medium, for example, a video disc or a video tape.

If 12 sets of video signals recorded on 12 recording media are played back simultaneously on 12 NTSC receivers using 12 playback devices, one high-definition image will be produced using 12 NTSC receivers. can be played back while maintaining its high quality.

〔Example〕

FIG. 2 is a block diagram showing an embodiment of the video signal recording method according to the present invention.

This embodiment consists of an AD converter 1 that converts an input high-definition signal into digital data, a vertical divider 2 that vertically divides the high-definition signal converted by the AD converter 1 into three for each frame and stores it, and a horizontal divider for the high-definition signal. scan line 5
A scanning line conversion unit 3 converts a book at a ratio of 7 horizontal scanning lines in the NTSC system, a horizontal division unit 4 divides each converted horizontal scanning line into 4 horizontally, and a vertical division unit 2 divides each converted horizontal scanning line into 3 in the vertical direction. A DA converter 5 converts each frame of 12 sets of horizontal scanning line data into NTSC video signals into NTSC video signals, and 12 sets of NTSC converted by the DA converter 5. The system is comprised of a recording section 6 that records video signals of each system onto 12 recording media.

The AD converter 1 converts an input high-definition signal into 8-bit digital data using a clock φ1 (for example, 48.6 MHz).As a human-powered high-definition signal, for example, the output of a high-definition VTR or a film image is converted into a high-definition signal. This includes the output of a telecine device that converts the MUSE signal sent from a broadcasting satellite into a high-definition signal, or the output of a MUSE decoder that converts the MUSE signal sent from a broadcasting satellite into a high-definition signal.

The vertical division section 2 includes an input latch circuit D that latches the high-definition signal converted into digital data by the AD conversion section 1.
I. A frame memory FMI-FM3 that stores the horizontal scanning line data of the first field of the high-definition signal latched in the latch circuit D1 by dividing it vertically into three parts, and similarly stores the horizontal scanning line data of the second field. The horizontal scanning line data stored in the frame memories FMI-FM3 and FMI' to FM3' are integrated for each stage and converted to the scanning line converter 3.
Output latch circuit D2. Consists of D3 and D4.

The human latch circuit Di clocks the high-definition signal φ2
(for example, 24.3 MHz), the output latch circuits D2 to D4 are latch circuits D2a=D4a that latch the scanning line data of the first field.
, latch circuits D2b-D4b that latch the scanning line data of the second field, and latch circuit D2c that integrates the outputs of both latch circuits D2a-D4a and D2b-D4b.
= D4c.

In the vertical dividing section 2 having such a configuration, the first 17 fields of the first field output from the latch circuit Dla
3 horizontal scanning line data are written to the memory FMI, the next <l/3 horizontal scanning line data are written to the memory 1JFM2, and the last 173 horizontal scanning line data are written to the memory FM3 at the negative edge timing of the clock φ2. Similarly, the data of the same field output from the latch circuit Dlb is written into the memories FMI-FM3 at the positive edge timing of the clock φ2. In this way, data for l fields is stored in the frame memory FMI~F.
It is divided into three parts and stored in M3. However, due to the calculation processing of seven consecutive horizontal scanning lines in the scanning line converter 3, which will be described later,
I am trying to generate and output horizontal scanning lines of a book, so
Seven consecutive horizontal scanning lines are connected to frame memories FMI and F.
Considering the case where it spans between M2 and M2, the upper memory F
The last three horizontal scanning lines (H) written to MI are simultaneously written to the middle stage memory FM2. The same applies to between the middle memory FM2 and the lower memory FM3, and between the lower memory FM3 and the upper memory FMI.

The data of the second field is also stored in the memories FMI' to FM3' in the same manner as the data of the first field described above.

In this way, the memories FMI to FM3 and F of the vertical conversion section 2
In MI' to FM3', horizontal scanning line data for one frame of a high-visibility signal is divided into three parts in the vertical direction and stored.

Next, the scanning line data written to the upper memory FMI of the first field is clocked by clock φ3 (for example, 11.3M
Hz) are read out at the negative edge and positive edge of the clock signal, respectively, and the latch circuit D2 of the output latch circuit D2
a and D2b.

The data latched by the latch circuits D2a and D2b are integrated by the latch circuit D2c, which operates with a clock signal of clock φ4 (for example, 22.7 MHz), and are supplied to the vertical filter VFI constituting the scanning line converter 3. The data stored in the memory FMl' in the upper stage of the second field is similarly supplied to the vertical filter VFI via the latch circuit D2.

Middle memories FM2 and F of the first and second fields
Similarly, the data stored in M2' is also sent to the vertical filter VF2 via the latch circuit D3 and to the lower memory F2.
The data stored in M3 and FM3' are similarly supplied to the vertical filter VF3 via the latch circuit D3.

The scanning line conversion section 3 performs 5-to-7 conversion on each stage of the horizontal scanning line data vertically divided into three by the vertical conversion section 2, and is composed of vertical filters VFI to VF3 having the same configuration.

FIG. 3 shows a typical configuration of the vertical filter VFi. This vertical filter VFI has a configuration in which seven IH memories H1 to H7 are connected in series for IH delaying input data, and the output of each memory H1 to H7 is connected to a latch circuit D.
The signals 1 to 7 are output via the ll-D17 to a coefficient circuit having a FROM configuration that multiplies a predetermined coefficient. Also, coefficient circuit K
The outputs of l- to 7 are supplied to latch circuits D21 to D27, among which the outputs of latch circuits D21 to D24 are added by adder circuits A1 to A3 and output to latch circuit D31.
Further, the outputs of the latch circuits D25 to D27 are output from the adder circuit A4.
The signals are added at A5 and output to the latch circuit D32. The data thus latched by latch circuits D31 and D32 are finally added together by adder circuit A6 and output. Each of these circuits constituting the vertical filter VFI is driven by a clock signal φ4, and the coefficients of the coefficient circuits 1 to 7 are changed in 7H cycles.

In the vertical filter VFI having such a configuration,
Q is the signal output from the IH memory in a certain IH section.
n, the signal output from that memory in the next IH interval is Q
When n+1, the output Pi is expressed by the following equation.

P * = h −t+ Q−s+ h−taQ−t+
h-? Q-1+ h oQo+ h ? Ql+h
t4Qz+ h□Q.

Pr =h-+*Q-t+h-ttQ-++h-sQo
+htQ++hqQz+hIIQ! +hwa Q4P! −
h-taQ-zrh-t? Q-++h-+oQo+h-
iQ++haQt+h+ IQ3+hlIQ4Ps =
h-0Q-t + h-+sQe+ h-IQl +
h-IQx+ h &Q3+ h 13Q4+ h
t. Q.

Pa −h−t*Q*+ h−tsQ++h−aQt
+ h + Qs+ h @Q4+ h +sQs+
h zrQhPs =h-+*Q++h-+tQwill+h
-4Q3+hsQa+hr. Qs+hl? Qh+h*a
Q7Ph -h-txQI+h-IhQz+h-*Qs
+h-tQa+hsQs+h ImQi+h19Q? P
? -(P o) = h-t+Qi+ h-+4Q
s+ h-yQ4+ hsQs+ h YQ&+ h
1aQt+ h zr Q■ Here, hn is the impulse response of the filter,
It is hn-hn.

In this way, one new horizontal scanning line is generated by adding the products obtained by multiplying each of the seven consecutive horizontal scanning lines by a predetermined coefficient, and outputted to the horizontal dividing section 4.

Figure 4 is a timing chart for explaining the operation for 5-neare conversion of horizontal scanning lines.Each IH memory transfers the first 2H section data, does not transfer data in the next IH section, and then The operation of transferring the 3H section data and stopping the transfer of the next IH section data is repeated. However, in each section, the constant of each coefficient circuit is changed for each H, and the output is calculated for each H, so as a result, new horizontal scanning lines are created at a rate of 7 out of 5 horizontal scanning lines. will be generated.

Next, the horizontal dividing unit 4 is for horizontally dividing the scanning line data output from the vertical filters VFI to VF3 constituting the scanning line converting unit 3 into four parts, and the output of the vertical filter VFI is -R14, the output of vertical filter VF2 is sent to IH memories H21 to H24,
The output of vertical filter VF3 is IH mesori) 131 to H3
Each of the data is divided into four in the horizontal direction and sequentially stored using a clock signal of clock φ4. Each IH memory H1l~H
Each of the 34 has two built-in IH memories, and when data is written to one IH memory using the clock signal φ4, the clock signal φ4 is written from the other IH memory.
Data reading operations are performed alternately using a clock signal of 5.5 (for example, 5.67 MHz).

In this way, 12 sets of horizontal scanning line data for one screen stored in each of the 12 IH memories H1l to H34 are output to the DA converter 5, and the DA converters DA11 to DA34 provided corresponding to each of the memories H1l to H34 NT respectively
The signal is converted into an SC video signal and output to the video disc recording devices R11 to R34 forming the recording section 6. The recording devices R11 to R34 record each NTSC signal onto the video disks VDII to VD34, respectively.

In this way, the upper screen #11 to #1 shown in FIG. 1(C)
The NTSC signal corresponding to 4 is the video disc VDII~
N corresponding to screens #21 to #24 in the middle row on VD14
The TSC signals are stored on the video disks VD21-VD24, and the NTSC signals corresponding to the lower screens #31-#34 are stored on the video disks VD31-VD34, respectively.

These 12 video discs VDII to VD34 are
By simultaneously playing back the same video disc player and displaying it simultaneously on 12 NTSC receivers, high-definition high-definition images can be played back on the NTSC receivers.

〔Effect of the invention〕

According to the present invention, one image according to the high-definition television system is divided into a plurality of images according to the current television system and recorded on a plurality of recording media, and the plurality of recorded images are transmitted to a plurality of current television receivers. This made it possible to play back high-definition television images while maintaining their high quality using current television receivers, and it was also possible to record the converted video signal on a recording medium. Since it is played back later, it is possible to play it back using a playback system with a simple configuration based on the current television playback system.

[Brief explanation of the drawing]

Figure 1 is a screen configuration diagram for explaining the present invention in detail, Figure 2 is a configuration diagram showing an embodiment of the present invention, and Figure 3 is a screen configuration diagram for explaining the present invention in detail.
FIG. 4 is a timing chart for explaining the operation of FIG. 3, and FIG. 5 is a diagram showing an example of an output image of the down converter. 2... AD converter, 2... Vertical divider, 3... Scanning line converter, 4... Horizontal divider, 5... DA converter, 6... Recorder.

Claims (2)

[Claims] (1) The number of horizontal scanning lines of the video signal according to the high-definition television system is converted to M times the number of horizontal scanning lines of the video signal according to the current television system, and the above video signal or the above converted video signal divided into M vertically and N horizontally.
The above M×N divided video signals are each M×N
A video signal recording method characterized by dividing and recording onto individual recording media. (2) Convert the number of horizontal scanning lines of the video signal according to the high-definition system to three times the number of horizontal scanning lines of the video signal according to the NTSC system, and vertically divide the video signal or the video signal after the conversion into three. , a video signal recording method characterized in that the video signal is divided into four in the horizontal direction, and each of the divided 12 (=3×4) sets of video signals is divided and recorded on 12 recording media.