Research on CAVLC audio-video synchronization coding approach based on H.264

In order to solve the problem of synchronization of audio and video effectively, a new method based on the H.264/AVC encoder is proposed. The new approach applies the highest-frequency sign bit of the Trailing Ones, which is in Context Adaptive Variable Length Coding (CAVLC) during the entropy coding process, to embed audio information into video stream. Experimental results show that the proposed method achieves synchronization between audio and video at no bit-rate increase, and the original audio information can be extracted from the H.264/AVC decoder without any distortion. At the same time, it has little effect on the quality of video.