Therefore, how to estimate precisely the distortion between the codec in error prone environments in order to choose the coding mode is the key problem of rate-distortion.
因此如何准确估算出差错环境下从编码器到解码器端的失真度，并由此来决定编码模式就成为率失真优化的关键问题。
Therefore, how to estimate precisely the distortion between the codec in error prone environments in order to choose the coding mode is the key problem of rate-distortion.
因此如何准确估算出差错环境下从编码器到解码器端的失真度，并由此来决定编码模式就成为率失真优化的关键问题。
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