A key of multimedia communication is the video communication due to the contradictory between the enormous data of video information transmitted and low transmitted rate in channel of network.
大数据量的视频信息传输与网络信道低传输速率的矛盾，使得视频通信成为多媒体通信的关键。
Watermarking techniques consider multimedia data as a communication channel transmitting owner identification or content integrity information.
数字水印技术把多媒体数据作为一种传输用户标识或内容完整性信息的通信信道来考虑。
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