Low delay sparse and mixed excitation celp coders for wideband speech coding

Przemysław Dymarski


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.
Author Przemysław Dymarski (FEIT / IT)
Przemysław Dymarski,,
- The Institute of Telecommunications
Journal seriesInternational Journal of Electronics and Telecommunications, [do 2009: Electronics and Telecommunications Quarterly], ISSN 2081-8491, e-ISSN 2300-1933, [0867-6747]
Issue year2020
Publication size in sheets0.5
ASJC Classification1705 Computer Networks and Communications; 2208 Electrical and Electronic Engineering
URL http://journals.pan.pl/dlibra/publication/130267/edition/113746/content
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
2020 Dymarski Low Delay Sparse and Mixed Excitation.pdf 1.05 MB
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 15-07-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.592
Citation count*
Share Share

Get link to the record

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Are you sure?