# US 5,351,133 A · Color video display with built-in color decompression system

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- Number: US 5,351,133 A
- Document ID: US5351133A
- Status: Granted
- Kind: A
- Application number: 07/966,892
- Filed: 1992-10-26
- Granted: 1994-09-27
- Earliest claimed: 1990-03-01
- Assignees: Ricoh Company, Ltd.
- Inventors: Steve M. Blonstein
- Web page: https://patentgrep.com/patent/US5351133A

## CPC

- H04N 21/4143: {embedded in a} Personal Computer [PC]
- G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)}
- H04N 1/646: {Transmitting or storing colour television type signals, e.g. PAL, Lab; Their conversion into additive or subtractive colour signals or vice versa therefor (H04N1/642, H04N1/644 take precedence)}
- H04N 19/423: characterised by memory arrangements (H04N19/433 takes precedence)
- H04N 19/428: {Recompression, e.g. by spatial or temporal decimation}
- H04N 19/61: in combination with predictive coding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

Color video display apparatus with built-in color decompression includes, in one embodiment, a first holding buffer for storing compressed video data representative of a color video image. A decompression means decompresses the stored image data into a frame buffer. A video monitor provides for displaying a representation of the color video image from the frame buffer.

## Claims

### Claim 1

A method for sequential display of a first region and a second region of a true-color high-resolution image on an image display means, said image display means comprising a video display monitor having an array of display pixels, said image being stored as compressed image data in a memory means, comprising the steps of:
(a) decompression of a portion of said compressed image data substantially corresponding only to said first region of said image to provide a first decompressed data package;
(b) storage of said first decompressed data package in a first portion of a frame buffer means, the storage capacity of said first portion of said frame buffer means being approximately equal to at least the size of said first decompressed data package and less than the size of the entirety of said compressed image data when decompressed;
(c) display of said first decompressed data package in said frame buffer means on substantially the entirety of said display pixels of said video display monitor;
(d) decompression of a portion of said compressed image data substantially corresponding only to said second region of said image to provide a second decompressed data package, said first region and said second region having substantially equal size;
(e) storage of said second decompressed data package in a second portion of said frame buffer means, the storage capacity of said second portion of said frame buffer means being approximately equal to at least the size of said second decompressed data package; and
(f) display of said second decompressed data package in said frame buffer means on substantially the entirety of said display pixels of said video display monitor.

### Claim 2 (depends on 1)

The method of claim 1 further including the steps, prior to Step (a), of:
spooling uncompressed image data from a storage means to a compression means;
compressing said uncompressed true-color high-resolution image data at said compression means to provide said compressed image data; and
storing said compressed image data in said memory means.