On the DPCM compression of Gaussian autoregressive sequences

Differential pulse-coded modulation (DPCM) encoding of Gaussian autoregressive (AR) sequences is considered. It is pointed out that DPCM is rate-distortion inefficient at low bit rates. Simple filtering modifications are proposed and incorporated into DPCM. A rate-distortion optimization framework t...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on information theory 2001-03, Vol.47 (3), p.945-956
Main Authors: Guleryuz, O.G., Orchard, M.T.
Format: Article
Language:English
Subjects:
Compressing
Data compression
Differential pulse code modulation
Filtering
Filters
Gaussian
Information technology
Mathematical analysis
Modulation
Optimization
Spectra
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Differential pulse-coded modulation (DPCM) encoding of Gaussian autoregressive (AR) sequences is considered. It is pointed out that DPCM is rate-distortion inefficient at low bit rates. Simple filtering modifications are proposed and incorporated into DPCM. A rate-distortion optimization framework that results in optimal filters is presented. It is shown that the designed filters take advantage of "less significant" process spectral components in order to achieve superior rate-distortion performance. Design equations are derived, issues related to optimization and complexity addressed. It is shown that simple DPCM systems with the proposed modifications significantly outperform their standard counterparts.
ISSN:0018-9448
1557-9654
DOI:10.1109/18.915650