Voice transmission quality improvement scheme for personal communication systems - Super Mute scheme

Masanobu Suzuki, Shuji Kubota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To improve the ADPCM voice quality in slow fading channels, this paper proposes the Super-Mute (S-Mute) scheme by using the probability distribution of ADPCM code without error bits and the error patterns. With consideration of characteristics of voice and channel error patterns, it makes it possible to reduce the code error significantly compared with conventional muting, which has only two replacement code pattern. Furthermore, this paper shows the adaptive replacement of ADPCM code against the grade of burst degradation by applying the channel quality estimation scheme, the ADPCM Code Detection (ACD) scheme. As a result, when the proposed scheme is employed, the Mean Opinion Score (MOS) improves by 0.6 points compared to the conventional muting scheme.

Original languageEnglish
Title of host publicationAnnual International Conference on Universal Personal Communications - Record
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages713-717
Number of pages5
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 1995 4th IEEE International Conference on Universal Personal Communications Record - Tokyo, Jpn
Duration: 1995 Nov 61995 Nov 10

Other

OtherProceedings of the 1995 4th IEEE International Conference on Universal Personal Communications Record
CityTokyo, Jpn
Period95/11/695/11/10

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ASJC Scopus subject areas

  • Hardware and Architecture

Cite this

Suzuki, M., & Kubota, S. (1995). Voice transmission quality improvement scheme for personal communication systems - Super Mute scheme. In Annual International Conference on Universal Personal Communications - Record (pp. 713-717). Piscataway, NJ, United States: IEEE.