Patent ID: 7031390
Filing Date: 2006-04-18
Classification: G06T,H04N

Abstract:
1. In a digital cinema system, a method of compressing a digital image, the image comprising pixel data, the pixel data separated into color components, the method comprising the acts of: reading a group of a color component of pixel data; generating a block size assignment to divide the group of a color component of pixel into sub-blocks of pixel data; transforming the sub-blocks of pixel data into corresponding frequency domain representations; and scaling the frequency domain representations into a stream of data, wherein the act of scaling is based on a quality metric correlating with the quality of the image; compiling at least one group of data from the stream data that may be represented as a 16×16 block; dividing the 16×16 group of data into groups that maybe represented as four 8×8 blocks; serializing each of the four 8×8 blocks of data; and run-length coding the serialized data using an exponential distribution wherein the run-length code is determined using the equation where R