| 摘要 |
Whether to encode a present video block of an incoming video frame, i.e., intra code, or whether to encode the difference between the present video block of the incoming frame and a best match video block from a previously store video frame, i.e., non-intra code, is determined in a video compression system (100). First, the present video block is divided into a predetermined number of sub blocks (301). Then, an average pixel value is calculated for each sub block (302) and used along with the individual pixel values of the sub block to determine sub block deviations (303). The sub block deviations are used to compute a present video block deviation (303). The present video block deviation is then compared with an error deviation (306) that is calculated based upon the present video block pixel values and the best match video block pixel values (305). If the comparison is favorable, then the difference between the present video block and the best match video block are encoded. If the comparison is unfavorable, then the present video block is encoded. |
