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Qualcomm code-excited linear prediction

Known as: Qualcomm PureVoice, 13k audio, 13k vocoder 
Qualcomm code-excited linear prediction (QCELP), also known as Qualcomm PureVoice, is a speech codec developed in 1994 by Qualcomm to increase the… Expand
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Enhanced Variable Rate CodecFFmpegVocoder

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2005
2005
Pitch and duration modification for speech watermarking
We propose a speech watermarking algorithm based on the modification of the pitch (fundamental frequency) and duration of the… Expand
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2005
2005
Web and Communication Technologies and Internet-Related Social Issues - HSI 2005, 3rd International Conference on Human.Society@Internet, Tokyo, Japan, July 27-29, 2005, Proceedings
Service.- Implementation and Usability Evaluation of AAC System for Handicapped Persons.- Tracking Data Management of Spatial… Expand
2001
2001
Combined Speech and Channel Coding for Wireless Communications
In this paper, we propose acombined variable-rate code-excited linearly predictive (QCELP)speech coding and unequal error… Expand
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1997
1997
Variable-rate CELP based on subband flatness
Code-excited linear prediction (CELP) is the predominant methodology for communications quality speech coding below 8 kbps, and… Expand
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1995
1995
A robust variable-rate speech coder
The goal of this study is to develop a robust and high-quality speech coder for wireless communication. The proposed coder is a… Expand
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1995
1995
FIR system identification using third- and fourth-order cumulants
A new set of equations relating the coefficients of a finite-impulse-response (FIR) system and the third- and fourth-order… Expand
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1994
1994
A single chip QCELP vocoder for CDMA digital cellular
This paper describes a full-custom ASIC implementation of the QCELP voice compression algorithm. Applications for the ASIC are… Expand
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1994
1994
Variable bit-rate CELP coding of speech with phonetic classification
A variable bit-rate speech coder intended for digital cellular applications is described. A voice activity detection algorithm is… Expand
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1993
1993
Variable rate speech coding with phonetic segmentation
A speech coder based on variable rate phonetic segmentation (VRPS), operating at an average rate of 3 kbit/s and applicable to… Expand
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Highly Cited
1993
Highly Cited
1993
QCELP: A Variable Rate Speech Coder for CDMA Digital Cellular
Digital cellular telephone systems require efficient encoding of speech to achieve capacity improvements required of the next… Expand
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