Quantized predictive coding
A new form of predictive quantization, dubbed quantized predictive coding (QPC), is presented. One version uses variable-length coding and another uses fixed-length coding. For autoregressive sources, it is shown both analytically and experimentally that the performance of QPC with (without) entropy-coding is, essentially, the same as that of DPCM (differential pulse code modulation) with uniform quantization with (without) entropy-coding. The principal advantage of QPC is that, unlike DPCM, it is a priori designed for digital implementation. As a result, its digital implementation is simpler than DPCM and suffers no loss in performance due to round-off errors.<<ETX>>