Patent ID: 6263021
Filing Date: 2001-07-17
Classification: G06T,H04N

Abstract:
A method for encoding a video image, comprising the steps of:(a) generating blocks of image data for the video image;(b) applying a transform to each block of image data to generate blocks of transform coefficients;(c) quantizing each block of transform coefficients to generate blocks of quantized coefficients;(d) performing segmentation analysis for the video image based on imagery in the video image to identify two or more different regions of interest, wherein each region of interest comprises a plurality of blocks; and(e) further processing each block of quantized coefficients to generate compressed video data, wherein:at least one non-zero quantized coefficient is treated as having a value of zero for the further processing; anddifferent numbers of coefficients are treated as having a value of zero for the further processing for blocks of different regions of interest independent of whether or not the coefficients are quantized to zero in step (c).