Embedded joint source-channel coding of speech using symbol puncturing of trellis codes
نویسندگان
چکیده
This paper presents an embedded joint source-channel coding scheme of speech. The source coder is an embedded variable bit rate perceptually based sub-band coder producing bits with different error sensitivities. The channel encoder is a Rate Compatible Punctured Trellis code (RCPT) which permits rate variability and unequal error protection by puncturing symbols. Furthermore, RCPT code design naturally incorporates large constellations, allowing high information rate per symbol. The embedded speech coder and the rate compatible puncturing of symbols provide the embeddibility of the joint coding scheme. The coder is robust to acoustic noise and produces good quality speech for a wide range of channel conditions (AWGN or fading), allowing digital transmission of speech with analog-like graceful degradation.
منابع مشابه
Speech transmission using rate-compatible trellis codes and embedded source coding
This paper presents bandwidth-efficient speech transmission systems using rate-compatible channel coders and variable bitrate embedded source coders. Rate-compatible punctured convolutional codes (RCPC) are often used to provide unequal error protection (UEP) via progressive bit puncturing. RCPC codes are well suited for constellations for which Euclidean and Hamming distances are equivalent (B...
متن کاملSpeech Transmission Using Rate - Compatible Trellis
| This paper presents bandwidth-eecient speech transmission systems using rate-compatible channel coders and variable bitrate embedded source coders. Rate-compatible punctured convolutional codes (RCPC) are often used to provide unequal error protection (UEP) via progressive bit puncturing. RCPC codes are well suited for constellations for which Euclidean distance and Ham-ming distance are equi...
متن کاملJoint Source and Channel Decoding for Variable Length Encoded Turbo Codes
Joint source and channel decoding (JSCD) has been proved to be an effective technique which can improve decoding performance by exploiting residual source redundancy. Most previous publications on this subject focus on a traditional coding scheme in which the source variable-length coding (VLC) is serially concatenated with a channel code. In this paper, a parallel concatenated coding scheme fo...
متن کاملDesign of Adaptive Bit Interleaved TCM for Rayleigh Fading Channels
fixed rate coding in terms of SNR and average throughput was obtained. In fact, the concept of variable rate adaptive In this paper, we propose a bandwidth efficient error corcoding and modulation has been widely applied in 3rd genrection scheme, namely the variable rate adaptive biteration TDMA systems like Enhanced Data rate for GSM interleaved trellis coded modulation (ABICM), for wireless E...
متن کاملDesign of Adaptive Bit Interleaved TCM for Rayleigh Fading Channels
fixed rate coding in terms of SNR and average throughput was obtained. In fact, the concept of variable rate adaptive In this paper, we propose a bandwidth efficient error corcoding and modulation has been widely applied in 3rd genrection scheme, namely the variable rate adaptive biteration TDMA systems like Enhanced Data rate for GSM interleaved trellis coded modulation (ABICM), for wireless E...
متن کامل