Research on Adaptive Macroblock Encoding Algorithm
Zeng Yong · Journal of the China Railway Society · 2006
It is found from a lot of experiments of the spatialdomain correlation of the H.264/AVC macroblock(MB) encoding types that the macroblock types decided by rate-distortion optimization(RDO) are of strong spatial-domain correlation no matter in Frame I,P or B.The region mean square errors(MSE) are used to measure the spatial-domain complexity of MB types and a prediction rule for the MB types is set down consequently.According to the prediction rule,a fast adaptive encoding algorithm is put forward on the basis of MB type spatial-domain prediction.The algorithm is verified by the H.264/AVC test model JM7.6.Extensive experiments show that the modified algorithm reduces the ineffective traversing of the H.264/AVC RDO algorithm considerably.The video-frequency coding time shortens by about 4%~33% while the image coding quality and compression performance are maintained fundamentally unchanged.Therefore, the slowness of the H.264/AVC RDO algorithm is compensated to a certain degree.