Representative frame extraction for digital video is important for forthcoming multimedia information retrieval.

典型帧提取是多媒体视频检索的一个重要技术分支。

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In terms of time frame, let me give you a sense of perspective from our U.S. Trade Representative, Ron Kirk, who has been in close contact in negotiations with his counterparts on the Russian side.

WHITEHOUSE: President Obama & President Medvedev Joint Press Conference | The White House