一种基于数字水印的音视频同步传输方法

A Watermarking-Based Multimedia Synchronized Transmission Scheme

由于网络带宽的变化和延迟抖动等因素的影响,使得音视频在线播放时容易发生不同步的现象,影响媒体呈现效果。对此,文中设计了一种基于数字水印的音视频同步编码传输方法,该方法将音频数按一定的对应关系嵌入到视频块的Q-DCT系数中传输;在接收端再从视频中提取音频数据并重建音频信号,从而达到音视频混合同步压缩传输的目的。实验表明:该方法在对图像质量影响很小的情况下,很好地实现了音视频的同步播放。

Because the changes in network bandwidth and delay jitter, and other factors easily lead audio and video to the phenomenon of unsynehronization, and thus influence the media display. As to this, a watermarkingbased audio and video synchronization transmission scheme is proposed in this paper. In this scheme, the audio data is embedded to video Q-DCT coefficient for tranamission. In the receiver, by extracting audio data from the video and reconstructing audio signal, the audio and video signals are compressed and transmitted with synchronization. Experiments show that the scheme not only has little influence on the image quality, but also achieves a very good synchronous player of audio and video.