Title :
Dither and data compression
Author :
Schobben, Daniel W E ; Beuker, Rob A. ; Oomen, Werner
Author_Institution :
Eindhoven Univ. of Technol., Netherlands
fDate :
8/1/1997 12:00:00 AM
Abstract :
This correspondence presents entropy analyses for dithered and undithered quantized sources. Two methods are discussed that reduce the increase in entropy caused by the dither. The first method supplies the dither to the lossless encoding-decoding scheme. It is argued that this increases the complexity of the encoding-decoding scheme. A method to reduce this complexity is proposed. The second method is the usage of a dead-zone quantizer. A procedure for determining the optimal dead-zone width in the mean-square sense is given
Keywords :
computational complexity; data compression; decoding; encoding; entropy; quantisation (signal); rate distortion theory; complexity reduction; data compression; dead-zone quantizer; distortion; dither; dithered quantized sources; entropy; lossless encoding-decoding scheme; mean-square error; optimal dead-zone width; undithered quantized sources; Data compression; Design methodology; Distortion measurement; Entropy; Mean square error methods; Phase change materials; Quantization; Transfer functions; Transform coding; White noise;
Journal_Title :
Signal Processing, IEEE Transactions on
