Low bit rate multi-pulse speech coder with natural speech quality

2005 ◽  
Author(s):  
K. Ozawa ◽  
T. Araseki
Keyword(s):  
Speech Quality ◽  
Natural Speech ◽  
Bit Rate ◽  
Low Bit Rate ◽  
Speech Coder

scholarly journals Adaptive variable bit-rate speech coder for wireless applications

2021 ◽  
Author(s):  
Junhong Chen
Keyword(s):  
Wireless Communication ◽  
Speech Coding ◽  
Speech Quality ◽  
Variable Bit Rate ◽  
Bit Rate ◽  
Wireless Applications ◽  
Speech Coder ◽  
Joint Channel ◽  
Essential Service ◽  
Low Rate

In wireless communication, speech is an essential service for which low rate speech coding is a key technique. Reducing the transmission bandwith and achieving higher speech quality are primary concerns in developing new speech coding algorithms. This report develops a joint channel and source controlled adaptive variable bit-rate algorithm to achieve a high speech quality and maintain an efficient spectrum.

Advanced Information Hiding for G.711 Telephone Speech

2013 ◽  
pp. 129-163 ◽  
Author(s):  
Akinori Ito ◽  
Yôiti Suzuki
Keyword(s):  
Data Hiding ◽  
Side Information ◽  
Low Complexity ◽  
Speech Quality ◽  
Rate Data ◽  
Bit Rate ◽  
Bandwidth Extension ◽  
Low Bit Rate ◽  
Speech Codec ◽  
Popular Speech

G.711 is the most popular speech codec for Voice over IP (VoIP). This chapter proposes a method for embedding data into G.711-coded speech for conveying side information for enhancing speech quality such as bandwidth extension or packet loss concealment. The proposed method refers to a low-bit rate encoder to determine how many bits are embedded into each sample. First, a variable-bit rate data hiding method is proposed as a basic framework of the proposed method. Then, the proposed method is extended to achieve fixed bit rate data hiding. According to comparison experiments, the proposed method is proved to achieve higher speech quality compared with the conventional method. Moreover, the authors developed a low-complexity speech bandwidth extension method that uses the proposed data hiding method.

Pseudo-multi-tap pitch filters in a low bit-rate CELP speech coder

1994 ◽  
Vol 14 (4) ◽  
pp. 339-358 ◽  
Author(s):  
Yasheng Qian ◽  
Gebrael Chahine ◽  
Peter Kabal
Keyword(s):  
Bit Rate ◽  
Low Bit Rate ◽  
Speech Coder

Excitation Construction for the Robust Low Bit Rate CELP Speech Coder

1995 ◽  
pp. 439-442
Author(s):  
Milan Jelinek ◽  
Geneviève Baudoin ◽  
Gérard Chollet ◽  
Michel Mauc
Keyword(s):  
Bit Rate ◽  
Low Bit Rate ◽  
Speech Coder
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