Journal ArticleDOI
A regular-pulse excited linear predictive codec
TLDR
A 16 kbit/s speech codec with low complexity and low signal delay is presented which is a special version of the Regular-Pulse Excitation LPC approach (RPE-LPC).About:
This article is published in Speech Communication.The article was published on 1988-07-01. It has received 16 citations till now. The article focuses on the topics: Adaptive Multi-Rate audio codec & Enhanced Variable Rate Codec.read more
Citations
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Journal ArticleDOI
The past, present, and future of speech processing
Biing-Hwang Juang,Tsuhan Chen +1 more
TL;DR: The research areas covered are speech analysis and synthesis, speech coding, speech enhancement, speech recognition, spoken language understanding, speaker identification and verification, and multimodal communication.
Speech recognition in mobile environments
Richard M. Stern,Juan M. Huerta +1 more
TL;DR: It is shown in this work that by selectively constructing a cepstral feature vector from the GSM codec parameters it is possible to reduce the effect of coding on recognition, and weighted acoustic modeling is introduced as an alternative to the method based on average distortion information.
Proceedings ArticleDOI
Predictive coding of speech using analysis-by-synthesis techniques
TL;DR: Different excitation signals are discussed, as well as procedures for determining the various coder parametsrs, which are based on analysis-by-synthesis techniques.
Journal ArticleDOI
Recognizing GSM digital speech
TL;DR: This paper proposes an alternative front-end for speech recognition over GSM networks, specially conceived to be effective against source coding distortion and transmission errors and suggests extracting the recognition feature vectors directly from the encoded speech instead of decoding it and subsequently extracting the feature vectors.
PatentDOI
Excitation pulse positioning method in a linear predictive speech coder
TL;DR: In this article, a method for positioning excitation pulses for a linear predictive coder (LPC) operating according to the multi-pulse principle is presented. But the method is restricted to a single frame and cannot be used for all pulses in a frame.
References
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Book
Theory and practice of error control codes
TL;DR: To understand the theoretical framework upon which error-control codes are built and then Algebraic Codes for Data Transmission by Richard E. Blahut, needed, several examples to illustrate the performance of the approximation scheme in practice are needed.
Proceedings ArticleDOI
A new model of LPC excitation for producing natural-sounding speech at low bit rates
TL;DR: This paper describes a new approach to the excitation problem that does not require a priori knowledge of either the voiced-unvoiced decision or the pitch period, and minimizes a perceptual-distance metric representing subjectively-important differences between the waveforms of the original and the synthetic speech signals.
Journal ArticleDOI
Regular-pulse excitation--A novel approach to effective and efficient multipulse coding of speech
TL;DR: Using the generalized baseband coder formulation, it is demonstrated that under reasonable assumptions concerning the weighting filter, an attractive low-complexity/high-quality coder can be obtained.
Proceedings ArticleDOI
High-frequency regeneration in speech coding systems
John Makhoul,M. Berouti +1 more
TL;DR: It is shown that the degree of rectification does not affect the output speech, and that the high-frequency noise source may be eliminated with proper processing, and a new type of HFR based on spectral duplication of the baseband is introduced.