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

Masanobu Suzuki, Shuji Kubota

研究成果: Paper査読

抄録

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.

本文言語English
ページ713-717
ページ数5
出版ステータスPublished - 1995 12 1
イベントProceedings of the 1995 4th IEEE International Conference on Universal Personal Communications Record - Tokyo, Jpn
継続期間: 1995 11 61995 11 10

Other

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

ASJC Scopus subject areas

  • ハードウェアとアーキテクチャ

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