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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… 
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Enhanced Variable Rate CodecFFmpegVocoder

Papers overview

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2010
2010
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… 
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… 
2000
2000
QCELP 보코더의 최적화 및 실시간 구현
1999
1999
Transcoding between QCELP 13K and G.723.1 CELP speech coders
Transcoding of speech coders occurs frequently in systems today as subsystems use different codecs for speech compression… 
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… 
1997
1997
A Single chip QCELP Speech Coder for CDMA Mobile System
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… 
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… 
1993
1993
CDMA 디지털 셀룰라용 음성부호화기 ( QCELP ) 의 복잡도 감소 알고리즘 및 성능 연구 ( Complexity-Reduced Algorithm and Performance of Speech Coder ( QCELP ) for CDMA Digital Cellular )
1993
1993
QCELP 음성 부호화기의 DSP 구현
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