METHOD AND APPARATUS FOR IMAGE ENCODING USING HOLD-MACROBLOCK, AND METHOD AND APPARATUS FOR IMAGE DECODING USING HOLD-MACROBLOCK

摘要

PPROBLEM TO BE SOLVED: To improve intra prediction for optimized usage of multi-core processors. PSOLUTION: Encoding starts from multiple intra coded seed MBs (macroblocks) per frame, and continues with adjacent MBs. A predefined prediction spread pattern (growth pattern) is used that comprises simultaneous prediction of two or more adjacent MBs per MB. Adjacent MBs with high coding cost are called "Hold-MB" (Hold-macroblocks) and can be held from being processed, until another neighboring edge is available for prediction. Encoding comprises marking a MB (macroblock) with high coding cost for deferred prediction. This MB is skipped while the other macroblocks are encoded. When a further adjacent MB has been encoded, the marked MB is predicted based on the adjacent macroblocks. Since a decoder receives the deferment marks and uses the same growth pattern, it follows the encoder, and predicts and decodes correctly. PCOPYRIGHT: (C)2011,JPO&INPIT