PRECISION DETERMINATION AND FAST CANDIDATE SELECTION FOR MERGE MODE WITH MOTION VECTOR DIFFERENCE IN VIDEO ENCODING

• Main Authors: Zhang, Ximin, Xu, Qian, Chiu, Yi-jen
• Format: Patent
• Language: English
• Published: 01.08.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

Different approaches for reducing complexity and computations in inter-prediction encoding are described. The approaches may involve one or more of quantization parameter and motion information being used to make a precision decision at a picture level that can improve compression efficiency. The approaches may involve finding prediction costs for the motion vector difference candidates and then performing rate-distortion optimization using the selected motion vector difference candidate having the lowest prediction cost. Prediction costs may be determined using sums of absolute transformed differences, which can be calculated efficiently in hardware. The rate-distortion cost of using merge mode with motion vector difference with the selected motion vector difference candidate may be compared against one or more other rate-distortion costs. In addition, in some scenarios, the approaches may involve finding prediction costs for a subset of the motion vector difference candidates to further reduce computations.