Title :
Improving DPCM system performance
Author :
Dunham, James George ; Ghosh, Amitava
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
A differential pulse code modulation (DPCM) system provides a fast and inexpensive data compression technique for analog signals. Two methods of improving the performance of DPCM systems are studied: the introduction of delays using incremental tree coding techniques and the design of nonuniform quantizers based upon optimization theory. The performance of matched integrator, perfect integrator, and optimization-based DPCM systems are compared for first order Gauss-Markov sources and mean square error using simulation techniques. Both methods improve system performance. The optimization based DPCM system provides substantial improvement for high bit rates
Keywords :
analogue-digital conversion; data compression; encoding; pulse-code modulation; analog signals; data compression; differential pulse code modulation; first order Gauss-Markov sources; high bit rates; incremental tree coding; matched integrator; mean square error; nonuniform quantizers; optimization theory; perfect integrator; simulation; system performance; Bit rate; Data compression; Delay; Design optimization; Gaussian processes; Mean square error methods; Modulation coding; Pulse compression methods; Pulse modulation; System performance;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64266
