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提出了一种在H.264运动估计过程中嵌入音频的音视频同步编码方法,利用1/4像素精度的运动搜索,解决了音视频同步编码问题。在发送端,根据1/4像素搜索点和音频的对应关系,在1/4像素运动估计过程中通过调整最优匹配点将音频压缩流嵌入视频中,然后对嵌入音频的视频流进行压缩编码。在解码端,根据嵌入准则,提取音频信息,再对音频和视频信号进行重构和恢复。实验表明,本文方法在不增加音视频压缩数据量、在音视频质量下降较小的情况下,实现了音视频同步压缩编码和传输。
An audio / video synchronization encoding method is proposed to embed audio in H.264 motion estimation. The motion search with 1/4 pixel accuracy solves the audio / video synchronization encoding problem. At the sending end, the audio compression stream is embedded into the video by adjusting the optimal matching point during 1/4 pixel motion estimation according to the correspondence between the 1/4 pixel search point and the audio, and then the video stream embedded with audio is compression-coded . At the decoding end, the audio information is extracted according to the embedding criterion, and then the audio and video signals are reconstructed and restored. Experiments show that this method achieves audio and video synchronization compression encoding and transmission without increasing the amount of compressed audio and video data, and with a small decrease in the quality of audio and video.