JPH04329780A - High definition video compatible multi-screen display processor - Google Patents

Abstract

PURPOSE:To obtain high picture quality with very less picture deterioration by generating an interpolation data in response to a still picture and a moving picture from each NTSC video signal with scanning line conversion of movement adaptive type so as to increase the quantity of information. CONSTITUTION:A high definition video signal is divided into three columns laterally and two stages longitudinally with a magnification device 5, converted into 6-patterns of NTSC video signals and fed to each scanning line conversion circuit 7. Each circuit 7 applies moving adaptive scanning line conversion to the signal, generates an interpolation data required in a field in the case of a still picture and converts each NTSC video signal into a sequential scanning video signal whose information quantity is doubled both in the longitudinal and lateral directions. Furthermore, the video signal of the circuit 7 is fed to a magnification device 8, converted into the NTSC video signal by each data selector 9 and a frame memory 10 and the NTSC video signal for 24- pattern magnification display. Then the information quantity of 6-patterns of the video signals of the device 5 is increased to obtain 24-patterns of the video signals with high picture quality.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-definition multi-screen display processing device for enlarging and converting a high-definition video signal into a 24-screen NTSC video signal while suppressing information loss.

0002

[Prior Art] Conventionally, high-definition video signals have an aspect ratio (horizontal) 16 x (vertical) 9, and the number of scanning lines in one frame is 11.
The NTSC video signal is an interlaced scanning signal with an aspect ratio (horizontal) of 4×(vertical) of 3, and the number of scanning lines per frame is 525.

[0003] In order to enlarge and display a high-definition video signal on an NTSC system multi-monitor while suppressing the loss of information, Japanese Patent Laid-Open No. 1-264483 (N04N
5/66) is a high-definition compatible 6 that uses memory to process a high-definition signal into 6 divisions into 3 horizontally and 2 vertically for each field, and converts it into a 6-screen NTSC video signal with 3 horizontal rows and 2 vertical rows. A surface magnification device is described.

In the case of this device, since a high-definition video signal is converted to an NTSC video signal without truncating information, each converted NTSC video signal is
By supplying the signal to multiple monitors on the same screen, high-definition video signals can be displayed in a high-quality enlarged manner.

[0005] By the way, in order to enlarge 24 pages in 6 rows horizontally and 4 columns vertically using the above-mentioned high-definition compatible 6-screen enlargement device, the 1989 publication of the magazine "Eizo Information (II)" (published by the Industrial Development Corporation) A special feature article on pages 39 to 44 of the September issue describes a high-definition compatible multi-screen display processing device having a configuration roughly shown in FIG. In the conventional apparatus shown in FIG. 2, a high-definition video signal is divided into four parts by a distributor 1 and is supplied in parallel to four high-definition six-screen enlargers 2.

[0006] Each enlarging device 2 is notified in advance from a controller (not shown) of its assigned portion (enlargement position), which is obtained by dividing the screen of the high-definition video signal into four parts, two rows horizontally and two rows vertically, and based on this notification, Each portion of the supplied high-definition video signal is taken into memory.

Furthermore, after each field is read twice in both the horizontal and vertical directions of the allocated portion of the memory to obtain the same amount of information as the original high-definition signal, it is converted to an NTSC video signal and enlarged to six screens. NTSC video signal is formed.

[0008]The NTSC video signals from the six screens of each enlarger 2 are supplied to the six video monitors 4 arranged in three horizontal rows and two vertical rows of the 24-screen multi-monitor 3 of the NTSC system, and the high-definition video signals are It is enlarged and displayed on page 24.

[0009]

[Problems to be Solved by the Invention] In the case of the conventional high-definition compatible multi-screen display processing device shown in FIG. Since each field is read twice in the horizontal and vertical directions and the amount of information is only increased using interlaced scanning, the method used in JP-A-2-243074
As in the case of the conventional example described in Japanese Patent Publication No. H04N5/66, there is a problem in that image quality deteriorates due to enlargement, regardless of whether it is a still image or a moving image.

[0010] Furthermore, there is a problem that four high-definition six-screen enlarging devices 2, which have large memory capacities and are expensive, are required, making them extremely expensive. SUMMARY OF THE INVENTION An object of the present invention is to provide a high-definition multi-screen display processing device that converts a high-definition video signal into a 24-screen NTSC video signal while preventing image quality deterioration due to enlargement using a relatively inexpensive configuration.

[0011]

[Means for Solving the Problems] In order to achieve the above object, in the high-definition compatible multi-screen display processing device of the present invention, the high-definition video signal is divided into 6 fields for each field so that no information is lost, and 3 horizontal rows , N of 6 sides in 2 vertical rows
One high-definition 6-screen enlarger that converts to TSC video signals, and sequential scanning video with a frame structure that doubles the amount of information both vertically and horizontally by motion-adaptive scanning line conversion of each of the NTSC video signals. A scanning line converter converts the video signals into signals, and converts each of the sequentially scanned video signals into NTS
It is equipped with an NTSC-compatible enlarging device that converts the video signal into a C video signal and forms an NTSC video signal for 24-screen enlarged display with 6 rows in the row and 4 rows in the vertical direction.

0012

In the display processing apparatus of the present invention constructed as described above, a high-definition video signal is first converted into a 6-screen NTSC video signal by a single high-definition compatible 6-screen enlarger. These six NTSC video signals are each subjected to motion-adaptive scanning line conversion by a scanning line conversion device, doubling the amount of information both vertically and horizontally, resulting in a total of (6
×4=) NTSC video signal information for 24 screens is formed.

At this time, by using motion-adaptive scanning line conversion, each NTSC video signal is converted into information by creating interpolated data corresponding to still images and moving images, instead of reading the memory twice in the horizontal and vertical directions as in the past. Since the amount is increased, image quality deterioration is extremely reduced. The video signal of each progressive scan is NTSC.
It is converted into an NTSC video signal by a compatible enlarging device, and this conversion forms signals for each of the four screens to form a high-quality NTSC video signal for 24-screen enlarged display. If the signal is supplied to a 24-screen multi-monitor using the NTSC system, 24-screen enlarged display of high-definition signals can be performed.

[0014]

Embodiment One embodiment will be described with reference to FIG. FIG. 1 shows a configuration for enlarging and displaying a high-definition signal on a 24-screen multi-monitor 3 using the NTSC system. 6 is a scanning line conversion device formed by six motion adaptive scanning line conversion circuits 7, and 8 is composed of 24 data selectors 9 and a frame memory 10. This is an NTSC compatible enlarger.

[0015]The high-definition video signal is then divided into six fields by an enlarging device 5, with three rows horizontally and two rows vertically.
The signal is converted into six NTSC video signals and supplied to each scanning line conversion circuit 7.

At this time, each scanning line conversion circuit 7 performs motion-adaptive scanning line conversion on the supplied NTSC video signal, similar to the scanning line conversion described in the above-mentioned Japanese Patent Laid-Open No. 2-243074, and converts the still image into a still image. If it is a video, the necessary interpolation data is generated within the frame, and if it is a video, the necessary interpolation data is generated within the field, resulting in a progressive scanning video signal that doubles the amount of information in each NTSC video signal both vertically and horizontally. Convert to

Further, the sequentially scanned video signals of each scanning line conversion circuit 7 are supplied to an enlarging device 8, and each data selector 9
, by each frame memory 10,
A conversion process to an NTSC video signal similar to the enlargement process described in Publication No. 2 (G09G 5/00) is performed to form an NTSC video signal for 24-screen enlarged display.

That is, the sequentially scanned video signals of each scanning line conversion circuit 7 are supplied in parallel to each selector 9, and each selector 9 selects the screen portion (shared portion) of each display monitor 4 constituting the multi-monitor 3. By this selection, each progressive scanning video signal is converted into an NTSC video signal for four screens, thereby forming a total of 24 screens of NTSC video signals.

Further, each NTSC video signal is transferred to each frame memory 10 after each selector 9, and each frame memory 10 is read out and the N
A TSC video signal is formed, and this NTSC video signal is supplied to each display monitor 4, so that the high-definition signal is enlarged and displayed on the multi-monitor 3.

Then, by data interpolation according to the movement of the image of each scanning line conversion circuit 7, the NTS of the six sides of the enlarging device 5 is
In order to increase the amount of information in the C video signal and convert it into a 24-screen NTSC video signal, the 6-screen NTSC video signal of each of the four high-definition enlargers is simply read twice in the horizontal and vertical directions to convert the 24-screen NTSC video signal into a 24-screen NTSC video signal. The deterioration in image quality due to enlargement, which occurs in conventional devices that convert NTSC video signals into NTSC video signals, is extremely reduced, and high image quality is achieved.

[0021] Furthermore, the apparatus is constructed using only one expensive high-definition enlarging apparatus, and the apparatus can be constructed at a low cost.

By the way, for example, if the NTSC video signal of each frame memory 10 is read twice, three times, etc. for each field, the NTSC video signal for enlarged display of 48 sides, 96 sides, etc.
A C video signal is formed, and since motion adaptive correction has already been applied to the signal in each memory 10 at this time, no image quality deterioration occurs due to enlargement even if it is read out repeatedly.

[0023]

[Effects of the Invention] Since the present invention is configured as described above, it produces the effects described above. The high-definition video signal is converted into six-screen NTSC video signals by a single high-definition compatible six-screen enlarging device 5, and each of the six NTSC video signals is subjected to motion-adaptive scanning line conversion by a scanning line converter 6. The amount of information is 2 both vertically and horizontally.
This results in a total of (6×4)=24 frames of NTSC video signal information.

At this time, through motion-adaptive scanning line conversion, each NTSC video signal is converted into information by creating interpolated data corresponding to still images and moving images, instead of reading the memory twice in the horizontal and vertical directions as in the past. Since the amount is increased, image quality deterioration is extremely reduced. The video signals of each progressive scan are converted into NTSC video signals by the NTSC compatible enlarging device 8.
An NTSC video signal for enlarged display is formed with higher image quality than before.

Therefore, it is possible to convert a high-definition video signal into an NTSC video signal for enlarged display using an inexpensive configuration while preventing image quality deterioration due to enlargement.
The 24-screen C-type multi-monitor allows for 24-screen enlarged display of high-definition video signals with high image quality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of a high-definition compatible multi-screen display processing device of the present invention.

FIG. 2 is a block diagram of a conventional device.

[Explanation of symbols]

3. Multi-monitor 5 High-definition compatible 6-screen enlargement device 6 Scanning line number conversion device 8 NTSC compatible enlarger

Claims (1)

[Claims] 1. A high-definition compatible 6-screen enlarging device that divides a high-definition video signal into 6 fields per field so that no information is lost and converts it into a 6-screen NTSC video signal with 3 horizontal rows and 2 vertical rows; a scanning line conversion device for converting each of the NTSC video signals into progressive scanning video signals having a frame structure in which the amount of information is doubled both vertically and horizontally by motion-adaptive scanning line conversion; and each of the progressive scanning video signals. 1. A high-definition multi-screen display processing device comprising: an NTSC-compatible enlarging device that converts each image into an NTSC video signal to form an NTSC video signal for 24-screen enlarged display with 6 horizontal columns and 4 vertical columns.