Research of Zero-Block Detection Criterion in H.264
Jiang Xiong · Journal of Southwest University · 2009
It is well-known that using motion search algorithm based on zero-block detection is a good method for accelerating video encoding.The critical technology of such methods is to select an appropriate threshold for zero-block detection so as to improve the speed of video encoding without causing too much decrease in picture quality and increase in bit-rate.Based on an introduction of transformation and quantization in H.264,the threshold for zero-block detection is theoretically analyzed and the range of threshold for zero-block detection is given.Then some experiments about the threshold are performed according to the theoretical analysis.By analyzing the experiment results,an emulated threshold which can be used for zero-block detection in H.264 is proposed.