Title :
Adaptive DPCM with median type predictors
Author :
Jarske, Tiina ; Neuvo, Yrjö
Author_Institution :
Tampere Univ. of Technol., Finland
fDate :
8/1/1991 12:00:00 AM
Abstract :
An improved DPCM (differential pulse code modulation) coding method for television applications is introduced. The method utilizes adaptive quantization and nonlinear, median type predictors. Consequently, it is called median adaptive DPCM (MADPCM). Simulation results indicate that good picture quality can be achieved with a compression ratio of 2.7:1 (3 bits/pixel). Using a three-dimensional spatiotemporal median-type predictor, even the compression ratio 4:1 (2 bits/pixel) gives good results
Keywords :
data compression; encoding; filtering and prediction theory; pulse-code modulation; video signals; ADPCM; DPCM; MADPCM; adaptive quantization; compression ratio; differential pulse code modulation; encoding; median adaptive DPCM; picture quality; spatiotemporal median-type predictor; television applications; Data compression; Digital TV; Discrete cosine transforms; HDTV; Image coding; Image reconstruction; Modulation coding; Pulse modulation; Quantization; Sampling methods;
Journal_Title :
Consumer Electronics, IEEE Transactions on
