Patent ID: 6661421
Filing Date: 2003-12-09
Classification: G06T

Abstract:
A method for compressing pixel data transmitted from a controller to a memory, the method comprising the steps of:storing in both the controller and the memory old pixel data corresponding to a plurality of old pixels, which old pixel data comprises a set of old pixel components for each old pixel represented by the old pixel data; calculating, in the controller, new pixel data for a plurality of new pixels, which new pixel data comprises a set of new pixel components for each new pixel represented by the new pixel data; calculating, in the controller, the differences between certain pixel components of the new pixel data and certain pixel components of the old pixel data; calculating, in the controller, the differences of the previously calculated differences between certain pixel components of the new pixel data and certain pixel components of the old pixel data; determining, in the controller, a compression format based on the calculated differences and the calculated differences of the differences; compressing the new pixel data by formatting the calculated differences and the calculated differences of the differences into the determined compression format in the controller; transmitting the compressed new pixel data from the controller to the memory; and decompressing the new pixel information within the memory.