Generally, the rate distortion model is employed to compute quantization parameter for the controlling bit rate. 通常码率控制算法使用一定的率失真模型来决策量化参数从而控制码率。
The rate and distortion of distributed source vector quantization are characterized and analyzed through the point density function of a quantizer. 研究分布式信源量化维数与量化性能之间的定量关系。
Experimental results reveal that the algorithms optimized for speed can reduce the computation complexity efficiently and keep approximate rate distortion performance, while the new transform and quantization method can improve rate distortion performance. 实验结果表明,速度优化算法在保持相近率失真性能的同时,能够有效降低编码的计算复杂度;新的整数变换及其量化方法能够提高编码的率失真性能。
An end-to-end rate distortion function was established considering the distortion caused by quantization and channel noise. 在综合考虑了由于量化噪声和信道噪声引起的失真等因素后,建立了一个端到端的率失真函数。