Signal modification for ADPCM based on analysis-by-synthesis framework

Author

Shin, Jong Won ; Kim, Nam Soo

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., South Korea

Volume

13

Issue

3

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

177

Lastpage

179

Abstract

In this letter, we propose a novel approach to improve the performance of the adaptive differential pulse code modulation (ADPCM) codec by modifying the input signal under the analysis-by-synthesis framework. Modification of the input signal is performed such that the ADPCM codec causes less quantization error. When applied to the ITU-T G.726 ADPCM coder, the proposed algorithm improves the output signal-to-noise ratio up to 2.39 dB.

Keywords

adaptive modulation; code standards; differential pulse code modulation; modulation coding; quantisation (signal); signal processing; speech codecs; speech coding; speech synthesis; ITU-T G.726 ADPCM codec; adaptive differential pulse code modulation; analysis-by-synthesis framework; quantization; signal modification; speech codec; Algorithm design and analysis; Codecs; Decoding; Modulation coding; Performance analysis; Pulse modulation; Signal analysis; Signal synthesis; Signal to noise ratio; Speech analysis; Adaptive differential pulse code modulation (ADPCM); analysis by synthesis; signal modification; speech codecs;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2005.862599

Filename

1593631