关键词: H.264, 运动矢量场, 残差编码位数, 熵能, 对象分割

Abstract: The paper presented a new temporal-spatial method for moving object segmentation in H.264 based on local self-adaptive threshold on entropy. The Motion Vector (MV) fields of several continuous frames were accumulated to enhance the motion information. Then the similarity measure was performed on the accumulated MV field to remove part of noise. And then residual size of 4×4 block was extracted from the compressed bitstream, and each 4×4 block threshold was selected by local self-adaptive threshold on entropy. Finally according to some formula, the article ulteriorly refine the boundary of the motion block. The H.264 sequences test demonstrates the validity of the proposed method.

Key words: H.264, Motion Vector (MV) field, coded residual bits, entropy energy, object segmentation