Title :
A Postfiltered DPCM Scheme
Author_Institution :
Univ. of Nebraska, Lincoln, NE, USA
fDate :
9/1/1985 12:00:00 AM
Abstract :
Quantization noise constitutes the limiting factor on DPCM performance. For a low number of levels in the quantizer, this noise is also correlated. In this correspondence we present a technique for improving the performance of the DPCM system at a very modest cost. The technique involves the use of an adaptive transversal filter at the receiver output to reduce the effects of quantization noise. The filter is trained at the transmitter and periodic updates sent to the receiver.
Keywords :
Adaptive filters; Differential pulse-code modulation; Quantization (signal); Signal quantization; Transversal filters; Additive noise; Filtering; Filters; Noise level; Noise reduction; Noise shaping; Pulse modulation; Quantization; Transmitters; Upper bound;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1985.1096413