Low delay sparse and mixed excitation celp coders for wideband speech coding
Authors:
- Przemysław Dymarski
Abstract
Code Excited Linear Prediction (CELP) algorithms are proposed for compression of speech in 8 kHz band at switched or variable bit rate and algorithmic delay not exceeding 2 msec. Two structures of Low-Delay CELP coders are analyzed: Low-delay sparse excitation and mixed excitation CELP. Sparse excitation is based on MP-MLQ and multilayer models. Mixed excitation CELP algorithm stems from the narrowband G.728 standard. As opposed to G.728 LD-CELP coder, mixed excitation codebook consists of pseudorandom vectors and sequences obtained with Long-Term Prediction (LTP). Variable rate coding consists in maximizing vector dimension while keeping the required speech quality. Good speech quality (MOS=3.9 according to PESQ algorithm) is obtained at average bit rate 33.5 kbit/sec.
- Record ID
- WUT8abbbdaa2b694e7183605bd01bac8b73
- Author
- Journal series
- International Journal of Electronics and Telecommunications, ISSN 2081-8491, e-ISSN 2300-1933, [0867-6747]
- Issue year
- 2020
- Vol
- 66
- Pages
- 69-76
- Publication size in sheets
- 0.50
- Keywords in English
- CELP, Low-Delay CELP, MP-MLQ, MOS, variable bit rate
- ASJC Classification
- ;
- DOI
- DOI:10.24425/ijet.2019.130267 Opening in a new tab
- URL
- http://journals.pan.pl/dlibra/publication/130267/edition/113746/content Opening in a new tab
- Language
- (en) English
- License
- File
-
- File: 1
- 2020 Dymarski Low Delay Sparse and Mixed Excitation.pdf
-
- Score (nominal)
- 70
- Score source
- journalList
- Score
- = 70.0, 10-05-2022, ArticleFromJournal
- Publication indicators
- = 0; = 0; : 2018 = 0.592
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT8abbbdaa2b694e7183605bd01bac8b73/
- URN
urn:pw-repo:WUT8abbbdaa2b694e7183605bd01bac8b73
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.