| 摘要 |
AN ENCODER (10) ACHIEVES IMPROVED ENCODING EFFICIENCY BY INITIALLY LIMITING CONSIDERATION OF THE POTENTIAL MODES (BLOCK SIZES) TO A PRESCRIBED SUB-SET AND BY PERFORMING MODE ESTIMATION JOINTLY WITH MODE DECISION-MAKING. AN INITIAL SUB-SET OF MODES IS CONSIDERED AND AN ESTIMATION OF THE MOTION FOR EACH BLOCK IN THE SUB-SET IS MADE TO ESTABLISH A BEST MOTION VECTOR.A DISTORTION MEASURE IS ALSO MADE FOR EACH SUB-SET. FROM THE DISTORTION MEASURE, A DETERMINATION IS MADE WHETHER OR NOT TO ESTIMATE THE MOTION FOR OTHER BLOCK SIZES. IF NOT,THEN AN ENCODING MODE IS CHOSEN IN ACCORDANCE WITH THE ESTIMATED MOTION. IN THIS WAY, MOTION ESTIMATION ON ALL POSSIBLE BLOCK SIZES NEED NOT BE UNDERTAKEN. |
