抄録
The paper presents a newly developed noise post-processing (NPP) algorithm for improving subjective performance of low bit-rate code excited linear prediction (CELP) decoding. The algorithm is based on a stationary noise generator and improves subjective quality of a noisy signal input. A backward adaptive detector defines noisy input signal segments from decoded line spectral frequency (LSF), energy, and pitch parameters. By using LSF and energy parameters from the past, the noise generator estimates and produces stationary noise. The algorithm is independent of the main codec algorithm and is applicable to any CELP decoder. When applied to G.729 and G.723.1, our test results show that the algorithm improves subjective performance at around 0.2-0.8 in degradation category rating (DCR) mean opinion score (DMOS) under several background noise conditions.
| 本文言語 | English |
|---|---|
| ホスト出版物のタイトル | 2002 IEEE Speech Coding Workshop: A Paradigm Shift Toward New Coding Functions for the Broadband Age, SCW 2002 - Proceedings |
| 出版社 | Institute of Electrical and Electronics Engineers Inc. |
| ページ | 178-180 |
| ページ数 | 3 |
| ISBN（印刷版） | 0780375491, 9780780375499 |
| DOI | |
| 出版ステータス | Published - 2002 |
| 外部発表 | はい |
| イベント | IEEE Speech Coding Workshop, SCW 2002 - Tsukuba City, Ibaraki, Japan 継続期間: 2002 10 6 → 2002 10 9 |
Other
| Other | IEEE Speech Coding Workshop, SCW 2002 |
|---|---|
| 国/地域 | Japan |
| City | Tsukuba City, Ibaraki |
| Period | 02/10/6 → 02/10/9 |
ASJC Scopus subject areas
- 言語学および言語
- コンピュータ ビジョンおよびパターン認識
- 人間とコンピュータの相互作用
- ソフトウェア
- 言語および言語学