在改变到一个更高的比特率的情况下，代码转换器将抛出一个错误，或产生较大的文件在质量和原来的一样。

In the case of changing to a higher bitrate, the transcoder will either throw an error, or produce a larger file at the same quality as the original.

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对误比特率分析的结果表明，量子噪声是引起比特错误的主要因素。

By analyzing the bit error rate, the results show that the major factor causing quantum bit errors is quantum noise.

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以四状态网格编码8 PS K系统为例，计算了维特比译码时错误路径的欧氏距离谱及由此得到的误比特率上限。

As an example, we calculate the Euclidean distance spectrum of error paths under viterbi decoding and BER upper bound for four-state Trellis-coded 8 PSK.

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