目前的视频流转码大致可以分为空域（像素域）转码和压缩域（DCT域）转码两种方法。
The technology of video stream transcoding can be divided into two types: spatial domain(pixel-domain) and compressed domain(DCT-domain).
视频转码技术可以动态处理压缩码流，将一种格式的压缩码流转换为另一种格式的码流，是有效提供通用多媒体存取服务的手段。
The video transcoding can process the pre-compressed bit-stream dynamically and convert one compressed bit-stream to another, which is the effective way to provide UMA.
视频转码器可以满足上述需求，将一种压缩格式的视频码流转换为另一种压缩格式，如不同码率、不同分辨率、不同语法格式等。
A video transcoder is a device that converts video from one compressed format into another compressed format with different bitrate, resolution or syntax.
视频转码器可以满足上述需求，将一种压缩格式的视频码流转换为另一种压缩格式，如不同码率、不同分辨率、不同语法格式等。
A video transcoder is a device that converts video from one compressed format into another compressed format with different bitrate, resolution or syntax.
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