量化引起失真，对于有失真编码，率失真函数(rate distortion function)给出了在限 定失真不超过D 的情况下可以达到的最低码率R(D).
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信号率失真函数 rate distortion function
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同时，给出了一种资源分配方案通过率失真函数使媒体速率适应估计的网络带宽。
Meanwhile the paper, presents a resource allocation scheme to adapt media rate to the estimated network bandwidth using rate-distortion function.
最后，导出了反映矢量量化器工作特性和率失真函数之间的数量关系的不等式串。
Finally, a series of inequalities is derived, which gives a quantitative relation between the performance of a vector quantizer and rate-distortion function.
这种算法考虑了信源在量化器量化判决区域的分布，通过寻找最小的拉格朗日率失真费用函数，获得量化器的判决电平。
The source distribution in decision region of quantizer is considered in this algorithm, and the decision level of quantizer is derived from the procedure of searching the minimum R D Lagrangian cost.
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