DPCM SYSTEM-DESIGN FOR DIVERSITY SYSTEMS WITH APPLICATIONS TO PACKETIZED SPEECH

被引：50

作者：

INGLE, A

VAISHAMPAYAN, VA

机构：

[1] Electrical Engineering Department, Texas A&M University, College Station

来源：

IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING | 1995年 / 3卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/89.365381

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Speech quality in packetized speech systems can degrade substantially when packets are lost. We consider the problem of DPCM system design for packetized speech systems. The problem is formulated as a multiple description problem and the problem of optimal selection of the encoder and decoder filters is addressed. We show that significant improvements in performance are obtained as compared to an earlier system proposed by Jayant and Christensen. Further, we show that for a first-order Gauss-Markov source significant performance improvements can be obtained by using a second-order predictor instead of a first-order predictor.

引用

页码：48 / 58

页数：11

共 14 条

[1]

Jayant N.S., Christensen S.W., Effects of packet losses in waveform coded speech and improvements due to an odd-even sample interpolation procedure, IEEE Trans. Commun., COM-29, pp. 101-109, (1981)

[2]

Shannon C.E., Coding theorems for a discrete source with a fidelity criterion, IRE Nat. Conv. Rec., pp. 142-163, (1959)

[3]

El Gamal A.A., Cover T.M., Achievable rates for multiple descriptions, IEEE Trans. Inform. Theory, IT-28, pp. 851-857, (1982)

[4]

Ozarow L., On a source coding problem with two channels and three receivers, Bell Syst. Tech. J., 59, pp. 1909-1921, (1980)

[5]

Vaishampayan V.A., Design of multiple description pp. scalar quantizers, IEEE Trans. Inform. Theory, 39, 3, (1993)

[6]

Vaishampayan V.A., Domaszewicz J., Design of entropy-constrained multiple description scalar quantizers, IEEE Trans. Inform. Theory, 40, 1, pp. 245-251, (1994)

[7]

Vaishampayan V., Vector quantizer design for diversity systems, Proc. 25th Ann. Conf. Inform. Sci., (1991)

[8]

Jayant N.S., Subsampling of a DPCM speech channel to provide two, self-contained" half-rate channels, 60, pp. 501-509, (1981)

[9]

Suzuki J., Taka M., Missing packet recovery techniques for low-bit-rate coded speech, IEEE J. Selected Areas Commun., 7, pp. 707-717, (1989)

[10]

Ayanoglu E., Gitlin R.D., Performance improvement in broadband networks using forward error correction for lost packet recovery, Proc. 26th Ann. Conf. Inform. Sci., (1992)

← 1 2 →