Variable bit rate modulo-PCM with multi-quantizer

Author

Mizui, Kiyoshi ; Hagiwara, Masafumi ; Nakagawa, Masao

Author_Institution

Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan

fYear

1988

fDate

28 Nov-1 Dec 1988

Firstpage

576

Abstract

The authors propose variable bit rate modulo-PCM with multiquantizer (VBR-MPCM-MQ), which applies the multiquantizer method to VBR-MPCM using an adaptive predictor (VBR-MPCM-AP) for selecting optimum step size. In VBR-MPCM-MQ, modulo amplitude, quantization bits, and step size are adaptively varied every block in order to prevent anomaly error and to increase data compression efficiency. By computer simulation, it is confirmed that the proposed VBR-MPCM-MQ has better performance by about 2 dB in both SQNR and segmental SQNR (SQNR seg) than conventional VBR-MPCM-AP. It is confirmed that the performance of VBR-MPCM-MQ is better by about 12 dB in SQNR and about 3 dB in SQNR seg than that of the conventional ADPCM (adaptive differential PCM) recommended by CCITT

Keywords

analogue-digital conversion; data compression; filtering and prediction theory; pulse-code modulation; CCITT; adaptive predictor; computer simulation; data compression; multiquantizer; optimum step size; variable bit rate modulo-PCM; Bit rate; Computer simulation; Data compression; Decoding; Delay effects; Electrochemical machining; Quantization; Sampling methods; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE

Conference_Location

Hollywood, FL

Type

conf

DOI

10.1109/GLOCOM.1988.25906

Filename

25906