Patent EP0158314A2 successfully refreshed from Google Patents.
EP0158314A2
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EP
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Video display control system
Assignee: Yamaha Corp
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Filing: 1985-04-09
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Granted: —
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Expires: 2005-04-09
Abstract
Abstract A video display control system is capable of moving a part of a still image from a first display area to a second display area on a screen. The video display control system includes a memory composed of a plurality of memory locations for storing a plurality of display data representative of images of display elements on the screen. First and second registers retain first and second area data representative of the first and second display areas, and an address data generator generates from these area data first and second address data, the first address data indicating memory locations which store display data corresponding to the first display area, the second address data indicating second memory locations which store display data corresponding to the second display area. A reading circuit reads the display data in the first memory locations in accordance with the first address data, while a writing circuit writes the read display data into the second memory locations in accordance with the second address data. The video display control system further includes another reading circuit and an operation circuit. This reading circuit reads the display data in the second memory locations and feeds the ready display data to the operation circuit which effects an operation such as a logical operation or a transparency processing on each pair of the display data read from the first and second memory locations. ,
Inventors
- 👤 Kazuhiko Nishi
- 👤 Ryozo Yamashita
- 👤 Takatoshi Ishii
- 👤 Takatoshi C/O Yamaha Corporation Okumura
- 👤 Shigemitsu C/O Yamaha Corporation Yamaoka
- 👤 Minoru C/O Yamaha Corporation Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 07:02
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/393; G06; G06T; G06T1/00; G06T1/60; G09G5/02; G09G5/026
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
270 words
In a video display control system including memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data and adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements each represented by a respective one of the plurality of display data stored in the storage area of the memory means, the video display control system characterized by the provision of: (a) first-register means for retaining first area information representative of a first display area on the screen; (b) second register means for retaining second area information representative of a second display area on the screen; (c) address information generator means for generating first address information and second address information in accordance with said first area information and said second area information, respectively, said first address information indicating first memory locations of the memory means in which display data representative of images of display elements in said first display area are stored, and said second address information indicating second memory locations of the memory means in which display data representative of images of display elements in said second display area are stored; (d) reading means for reading, in accordance with said first address information, said display data representative of images of the display elements in said first display area from said first memory locations; and (e) writing means for writing, in accordance with said second address information, said display data read by said reading means into said second memory locations of said memory means.
Claim 2
Dependent Claim
270 words
In a video display control system including memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data and adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements each represented by a respective one of the plurality of display data stored in the storage area of the memory means, the video display control system characterized by the provision of: (a) first-register means for retaining first area information representative of a first display area on the screen; (b) second register means for retaining second area information representative of a second display area on the screen; (c) address information generator means for generating first address information and second address information in accordance with said first area information and said second area information, respectively, said first address information indicating first memory locations of the memory means in which display data representative of images of display elements in said first display area are stored, and said second address information indicating second memory locations of the memory means in which display data representative of images of display elements in said second display area are stored; (d) reading means for reading, in accordance with said first address information, said display data representative of images of the display elements in said first display area from said first memory locations; and (e) writing means for writing, in accordance with said second address information, said display data read by said reading means into said second memory locations of said memory means.
Claim 3
Dependent Claim
93 words
A video display control system according to claim 1 further comprising: second reading means for reading, in accordance with said second address information, said display data representative of the display elements in said second display area from said second memory locations; and operation means for effecting a certain operation on each of said display data read from said first memory locations and a corresponding one of said display data read from said second memory locations to output operated display data; said storing means storing said operated display data into said second memory locations.
Claim 4
Dependent Claim
30 words
A video display control system according to claim 2, wherein each of the display data is a color code representative of color of a respective one of the display elements.
Claim 5
Dependent Claim
48 words
A video display control system according to claim 2, wherein said operation means effecting a logical operation on each of said display data read from said first memory locations and a corresponding one,of said display data read from said second memory locations to output logically operated display data.
Claim 6
Dependent Claim
67 words
A video display control system according to claim 2 further comprising transparency data detection means for detecting that said display data read from said first memory locations is representative of transparency, said operation means outputting said data read from said second memory locations when the transparency is detected and said operation means outputting said data read from said first memory locations when the transparency is not detected.
Claim 7
Dependent Claim
103 words
A video display control system according to claim 1, wherein the memory means further comprises a second storage area composed of a plurality of memory locations for storing a plurality of display data, the screen of the.video display unit being composed of an actual display screen and an imaginary screen, each of the display elements of said actual screen being represented by the display data stored in the storage area of the memory means, and each of display elements of said imaginary screen being represented by a respective one of said display data stored in said second storage area of the memory means.
Claim 8
Dependent Claim
59 words
A video display control system according to claim 1, wherein the display data stored in the storage area of the memory means are composed of a plurality of groups of display data, each group including more than one display data and being stored in a respective one of the memory locations of the storage area of the memory means.
Claim 9
Dependent Claim
342 words
In a video display control system including proper memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data and adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements each represented by a respective one of the plurality of display data stored in the storage area of the memory means, the video display control system characterized by the provision of: extended memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data; first register means for retaining first area information representative of a first display area on the screen; second register means for retaining second area information representative of a second display area on the screen; address information generator means for generating first address information and second address information in accordance with said first area information and said second area information, respectively, said first address information indicating first memory locations of the memory means in which display data representative of images of display elements in said first display area are stored, and said second address information indicating second memory locations of the memory means in which display data representative of images of display elements in said second display area are stored; third register means for retaining first and second selection data; memory selection means for selecting the proper memory means and the extended memory means in accordance with said first and second selection data, respectively; reading means for reading, in accordance with said first address information, the display data representative of images of the display elements in said first display area from said first memory locations of the memory means selected in accordance with said first selection data; and writing means for writing, in accordance with said second address information, said display data read by said reading means into said second memory locations of the memory means selected in accordance with said second selection data.
Claim 10
Dependent Claim
342 words
In a video display control system including proper memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data and adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements each represented by a respective one of the plurality of display data stored in the storage area of the memory means, the video display control system characterized by the provision of: extended memory means having a storage area composed of a plurality of memory locations for storing a plurality of display data; first register means for retaining first area information representative of a first display area on the screen; second register means for retaining second area information representative of a second display area on the screen; address information generator means for generating first address information and second address information in accordance with said first area information and said second area information, respectively, said first address information indicating first memory locations of the memory means in which display data representative of images of display elements in said first display area are stored, and said second address information indicating second memory locations of the memory means in which display data representative of images of display elements in said second display area are stored; third register means for retaining first and second selection data; memory selection means for selecting the proper memory means and the extended memory means in accordance with said first and second selection data, respectively; reading means for reading, in accordance with said first address information, the display data representative of images of the display elements in said first display area from said first memory locations of the memory means selected in accordance with said first selection data; and writing means for writing, in accordance with said second address information, said display data read by said reading means into said second memory locations of the memory means selected in accordance with said second selection data.
Claim 11
Dependent Claim
117 words
A video display control system according to claim 8 further comprising: second reading means for reading, in accordance with said second address information, said display data representative of the display elements in said second display area from said second memory locations of the memory means selected in accordance with said second selection data; and operation means for effecting a certain operation on each of said display data read from said first memory locations and a corresponding one of said display data read from said second memory locations to output operated display data; said writing means writing said operated display data into said second memory locations of the memory means selected in accordance with said second selection data.
Claim 12
Dependent Claim
29 words
A video display control system according to claim 9, wherein each of the display data is a color code representative of color of a respective one of display elements.
Claim 13
Dependent Claim
49 words
A video display control system according to claim 9, wherein said operation means effecting a logical operation on each of said display data read from said first memory locations and a corresponding one of said display data read from said second memory locations to output logically operated display data.
Claim 14
Dependent Claim
67 words
A video display control system according to claim 9 further comprising transparency data detection means for detecting that said display data read from said first memory locations is representative of transparency, said operation means outputting said data read from said second memory locations when the transparency is detected, and said operation means outputting said data read from said first memory locations when the transparency is not detected.
Claim 15
Dependent Claim
104 words
A video display control system according to claim 8, wherein the proper memory means further comprises a second storage area composed of a plurality of memory locations for storing a plurality of display data, the screen of the video display unit being composed of an actual display screen and an imaginary screen, each of the display elements of said actual screen being represented by the display data stored in the storage area of-the memory means, and each of display elements of said imaginary screen being represented by a respective one of said display data stored in said second storage area of the memory means.
Claim 16
Dependent Claim
59 words
A video display control system according to claim 8, wherein the display data stored in the storage areas of the memory means are composed of a plurality of groups of display data, each group including more than one display data and being stored in a respective one of the memory locations of the storage areas of the memory means.
Claim 17
Dependent Claim
112 words
A video display control system according to claim 8 further comprising: a central processing unit which has an address bus and a data bus operatively connected to data terminals of said proper memory means and extended memory means; fourth register means for retaining third selection data supplied from said central processing unit; and address control means responsive to an output of said fourth register means for selectively feeding address information outputted onto said address bus by said central processing unit to address input terminals of one of said proper memory and said extended memory means; whereby transfer of display data is effected between said central processing unit and the selected memory means.
Claim 18
Dependent Claim
252 words
In a video display control system adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements in accordance with synchronization signals of the video display unit, the video display control system characterized by the provision of: a plurality of memory means for storing a plurality of display data each representative of image of a respective one of the display elements on the screen, each of the display data being composed of at least one data portion, each of said plurality of memory means comprising a plurality of memory locations and storing corresponding portions of said plurality of display data; reading means for sequentially reading each of the display data from said plurality of memory means in accordance with the synchronization signals, said read display data being -supplied to the video display unit; a central processing unit which has an address bus and has a data bus operatively connected to data terminals of said plurality of memory means; register means for retaining a selection data supplied from said central processing unit; and address control means responsive to an output of said register means for selectively feeding address information outputted onto said address bus by said central processing unit to address input terminals of one of said plurality of memory means; whereby transfer of selected portions of display data is effected between said central processing unit and the selected one of said plurality of memory means.
Claim 19
Dependent Claim
252 words
In a video display control system adapted to be connected to a video display unit for displaying, on a screen of the video display unit, an image composed of a plurality of display elements in accordance with synchronization signals of the video display unit, the video display control system characterized by the provision of: a plurality of memory means for storing a plurality of display data each representative of image of a respective one of the display elements on the screen, each of the display data being composed of at least one data portion, each of said plurality of memory means comprising a plurality of memory locations and storing corresponding portions of said plurality of display data; reading means for sequentially reading each of the display data from said plurality of memory means in accordance with the synchronization signals, said read display data being -supplied to the video display unit; a central processing unit which has an address bus and has a data bus operatively connected to data terminals of said plurality of memory means; register means for retaining a selection data supplied from said central processing unit; and address control means responsive to an output of said register means for selectively feeding address information outputted onto said address bus by said central processing unit to address input terminals of one of said plurality of memory means; whereby transfer of selected portions of display data is effected between said central processing unit and the selected one of said plurality of memory means.
References Cited (Backward Citations)
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