Differential pulse code modulation (DPCM) has long been a popular method of data compression for speech. It has not been as popular for images partly because of its poor edge performance. This is true even for adaptive DPCM (ADPCM). A recent paper by Gibson provides a clue to the reason for this shortcoming. His analysis is used to motivate the design of backward adaptive ARMA predictors for use in differential encoding of images. Simulations using these predictors validate the approach, as these systems show significant objective gains as well as noticeable subjective improvements in the edge performance. An added advantage to using this approach is the improvement in noisy-channel performance.
|Original language||English (US)|
|Number of pages||5|
|Journal||IEEE Transactions on Acoustics, Speech, and Signal Processing|
|Publication status||Published - Nov 1988|
ASJC Scopus subject areas
- Signal Processing