Proceedings ArticleDOI
Coding unconstrained FCB excitation using combinatorial and Huffman codes
Udar Mittal,James P. Ashley,Edgardo M. Cruz-Zeno +2 more
- pp 129-131
TLDR
A method for coding "unconstrained" fixed codebook (FCB) excitation for ACELP speech coders and it is proposed that the unconstrained FCB does not place track-based constraint on the pulse positions.Abstract:
A method for coding "unconstrained" fixed codebook (FCB) excitation for ACELP speech coders is proposed. The unconstrained FCB does not place track-based constraint on the pulse positions. The coding method combines Huffman codes and combinatorial codes. The method is less sensitive to bit errors and is nearly as efficient as the combinatorial codes. A method for efficiently storing the parameters needed in the combinatorial codebook is also proposed.read more
Citations
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Proceedings ArticleDOI
Low Complexity Factorial Pulse Coding of MDCT Coefficients using Approximation of Combinatorial Functions
TL;DR: A very low complexity method for approximation of combinatorial functions is proposed which enables use of factorial packing in encoding/decoding of 144 MDCT coefficients using 28 unit magnitude pulses for the audio coding mode of the EVRC-WB speech coding standard without affecting the number of bits required for coding.
Patent
Encoder for audio signal including generic audio and speech frames
TL;DR: In this paper, a method for encoding audio frames by producing a first frame of coded audio samples by coding a first audio frame in a sequence of frames, producing at least a portion of a second frame of audio samples, and producing parameters for generating audio gap filler samples.
Patent
Low-complexity bit-robust method and system for combining codewords to form a single codeword
Udar Mittal,James P. Ashley +1 more
TL;DR: In this paper, a system for combining codewords is described, which can include a splitter for splitting a first codeword into a most significant bits part MSP (112 ) and a least significant bit part LSP (114 ), a combiner for combining the MSP and LSP of the first word with a second word, and a concatenator for concatenating the first group with the LSP to produce a second group.
Patent
Apparatus and method for low complexity combinatorial coding of signals
TL;DR: In this paper, the authors used low complexity estimates of complex functions to perform combinatorial coding of signal vectors and disregarded the accuracy of such functions as long as certain sufficient properties are maintained.
Patent
System and method for encoding and decoding pulse indices
Xiang Yu,Dake He,En-hui Yang +2 more
TL;DR: In this paper, the source coding schemes are applied to encode a fixed codebook component of the excitation for a codec employing codebook excited linear prediction, for example an AMR-WB (Adaptive Multi-Rate - Wideband) speech codec.
References
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