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Scalable Multimode Tree Coder with perceptual pre-weighting and post-weighting for wideband speech coding

Ying-Yi Li, Jerry D. Gibson
2011 2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR)  
In addition, the algorithmic delay of the Multimode Tree Coder is 12.375 ms, which is about half of AMR-WB, and computational complexity is about a third of AMR-WB.  ...  The average bit-rate of the Mutlimode Tree Coder operates at 30%-60% of the bit-rate of G.722.  ...  The Code Generator, a G.727 codec, codes the pre-weighted sample, x L , at a suitable bit-rate based on the results of the mode decision.  ... 
doi:10.1109/acssc.2011.6190068 dblp:conf/acssc/LiG11 fatcat:yso4ie6mqbctbfsblmngpiymgm

Speech Quality Factors for Traditional and Neural-Based Low Bit Rate Vocoders

Wissam A. Jassim, Jan Skoglund, Michael Chinen, Andrew Hines
2020 2020 Twelfth International Conference on Quality of Multimedia Experience (QoMEX)  
gender and coding delays.  ...  The results provide valuable insights into aspects of the speech signal that will be used to develop a novel metric to accurately predict speech quality from generative-model-based coders.  ...  ACKNOWLEDGMENTS This publication has emanated from research supported in part by the Google Chrome University Program and research grants from Science Foundation Ireland (SFI) co-funded under the European  ... 
doi:10.1109/qomex48832.2020.9123109 dblp:conf/qomex/JassimSCH20 fatcat:odtverqamjbv5oy7mezc6rfiuq

Speech Quality Factors for Traditional and Neural-Based Low Bit Rate Vocoders [article]

Wissam A. Jassim, Jan Skoglund, Michael Chinen, Andrew Hines
2020 arXiv   pre-print
gender and coding delays.  ...  The results provide valuable insights into aspects of the speech signal that will be used to develop a novel metric to accurately predict speech quality from generative-model-based coders.  ...  ACKNOWLEDGMENTS This publication has emanated from research supported in part by the Google Chrome University Program and research grants from Science Foundation Ireland (SFI) co-funded under the European  ... 
arXiv:2003.11882v1 fatcat:ybvuiq7lk5hzlhptj7rbi6b26u

Tandeming analysis of perceptual pre-weighting and post-weighting Multimode Tree Coder

Ying-Yi Li, Pravin Ramadas, Jerry D. Gibson
2010 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers  
The perceptual pre-weighting and post-weighting Multimode Tree Coder is low delay and low complexity.  ...  The results show that the tandem performance of the Multimode Tree Coder is comparable to the AMR-NB coder at 12.2 kbps.  ...  Even though Tree Coding is a delayed coding, the code generator is backward adaptive, so there is no frame delay and the look-ahead delay is low.  ... 
doi:10.1109/acssc.2010.5757623 fatcat:ud66cwfpwvc4fltrdojah26ow4

Phonetically Switched Tree coding of speech with a G.727 Code Generator

Pravin Ramadas, Jerry D. Gibson
2009 2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers  
Each mode is coded at a suitable bit-rate using a Tree Coder with perceptual error weighting criteria and a G.727 Code Generator.  ...  Apart from efficient coding, the Tree coder smoothes transitions between different coding modes.  ...  The design of a tree coder consists of selecting a code generator, a tree search algorithm, a distortion measure and a path map symbol release rule as shown in Figure 3 .  ... 
doi:10.1109/acssc.2009.5469977 fatcat:dop2usjhqnc5te5tjw3mzd5bb4

A Wide Band Speech Coding Technique using Low Delay Code Excited Linear Predictive Algorithm (LD-CELP)

Swati Joshi, Hemant Purohit
2017 Proceedings of the Second International Conference on Research in Intelligent and Computing in Engineering  
In general the CELP is an algorithm to design a good quality speech coder. From 80's to present the advancement in this technique is going on.  ...  A fair level of speech quality is desired in speech transmission for mobile voice services. The effective utilization of bandwidth and higher bit rate is must for a best quality speech coder.  ...  The CELP coder is a parametric coder hence it is work on the principle of 'Analysis by Synthesis' [2] .  ... 
doi:10.15439/2017r03 dblp:conf/rice/JoshiP17 fatcat:ecaznyvhmjcrdddbiybsbwzwce

Multimode Tree Coding of speech with backward pitch prediction and perceptual pre- and post-weighting

Ying-Yi Li, Jerry D. Gibson
2012 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR)  
For the Multimode Tree Coding, the speech is classified into five different modes, and each mode is coded at a suitable bit-rate using a tree coder with perceptual pre-and post-weighting filters.  ...  A low delay and low complexity Multimode Tree Coder with backward pitch predictor is proposed.  ...  Tree Coding Fig . 2 shows the block diagram of a tree coder. A tree coder consists of a code generator, a tree search algorithm, distortion calculations, and a path map symbol release rule.  ... 
doi:10.1109/acssc.2012.6488963 dblp:conf/acssc/LiG12 fatcat:uelcxchpkrhunjoprlwiufyq2e

Analytical Study of High Pitch Delay Resolution Technique for Tonal Speech Coding

Jingwen
2012 American Journal of Applied Sciences  
Problem statement: In tonal-language speech, since tone plays important role not only on the naturalness and also the intelligibility of the speech, it must be treated appropriately in a speech coder algorithm  ...  Approach: This study proposes an analytical study of the technique of High Pitch Delay Resolutions (HPDR) applied to the adaptive codebook of core coder of Multi-Pulse based Code Excited Linear Predictive  ...  This study presents a technique of high pitch delay resolutions or HPDR for a bitrate scalable tonal language speech coder based on a multi-pulse based code excited linear predictive coding.  ... 
doi:10.3844/ajassp.2012.350.353 fatcat:rhki7s3envc4dhfmtogpjcr32a

High Quality Low-Delay Speech Coding at 12 kb/s [chapter]

J. Grass, P. Kabal, M. Foodeei, P. Mermelstein
1993 Speech and Audio Coding for Wireless and Network Applications  
The former combination was preferred. Prediction Filter The original implementation of the low-delay tree coder uses the generalized predictive coder configuration [5] .  ...  An alternate coding structure operating at the same rate is based on an ML-Tree algorithm [5]. Both algorithms offer near-network quality with coding delays below 2 ms at 16 kb/s.  ... 
doi:10.1007/978-1-4615-3232-3_2 fatcat:jijpjradnbgkzilu6zc2vrqqga

Low bit-rate speech coders for multimedia communication

R.V. Cox, P. Kroon
1996 IEEE Communications Magazine  
Its frame size of 30 ms and one-way algorithmic codec delay o f 37.5 ms allow for a further reduction in bit rate compared to the 6.729 coder.  ...  Annex A of Rec. G.729 is a reduced-complexity version of the CS-ACELP coder.  ...  DELAY The delay of a speech coding system usually consists of three major components. Most low-bit-rate speech coders process a frame of speech data at a time.  ... 
doi:10.1109/35.556484 fatcat:ha2gxhkvazgkvi2rqlbqxzptfa

Multi-Pulse Based Code Excited Linear Predictive Speech Coder with Fine Granularity Scalability for Tonal Language

Chomphan
2010 Journal of Computer Science  
The MP-CELP speech coder which is a candidate of the MPEG4 natural speech coder supports a flexible and wide bit-rate range. However, a fine scalability had not been included.  ...  Approach: In this study, based on the MP-CELP speech coding with HPDR technique, Fine Granularity Scalability was introduced by adjusting the amount of transmitted fixed excitation information.  ...  The excitation of certain subframe can be generated just by extension of the previous one with little quality degradation.  ... 
doi:10.3844/jcssp.2010.1288.1292 fatcat:d24rwdezazbr7pu7medcray3zi

Investigating the use of asymmetric windows in CELP vocoders

D.A.F. Florencio
1993 IEEE International Conference on Acoustics Speech and Signal Processing  
The behavior of several windows in relation to time delay and spectral estimation is analyzed in its application to CELP coders, with emphasis on time delay considerations.  ...  It is shown that a reduction in delay of up to 8 ms can be obtained with no penalty in quality, simply with the correct choice of the window.  ...  In most applications (general telephony, mobile communications, etc) one of the im-portant aspects of the performance of these coders is time delay, and every effort has to be done to keep the coding delay  ... 
doi:10.1109/icassp.1993.319331 dblp:conf/icassp/Florencio93 fatcat:z4cpajbpkfcmdmolh7it7zl3gm

A general joint source-channel matching method for wireless video transmission

L. Qian, D.L. Jones, K. Ramchandran, S. Appadwedula
1999 Proceedings DCC'99 Data Compression Conference (Cat. No. PR00096)  
We utilize a parametric model approach which avoids the necessity of having detailed a priori knowledge of the coders, thus making the scheme applicable to a wide variety of source and channel coder pairs  ...  delay and buffer constraints.  ...  It utilizes a parametric model of the source coder performance to provide generality, and optimizes the end-to-end performance while including the critical delay, rate, and buffer control constraints required  ... 
doi:10.1109/dcc.1999.755691 dblp:conf/dcc/QianJRA99 fatcat:l6gqzk3dmfbslnjnyryydyvtdq

MINLAB: minimum noise structure for ladder-based biorthogonal filter banks

See-May Phoong, Yuan-Pei Lin
2000 IEEE Transactions on Signal Processing  
For both AR(1) process and MA(1) process, the MINLAB coder with two taps has a higher coding gain than the optimal orthonormal coder with an infinite number of taps.  ...  Optimal bit allocation and coding gain formulas are derived. We show that the coding gain of the optimal MINLAB coder is always greater than or equal to unity.  ...  ACKNOWLEDGMENT The authors are thankful to Prof. T. Q. Nguyen, Boston University, Boston, MA, for bringing our attention to the recent developments on lifting schemes, which inspired this work.  ... 
doi:10.1109/78.823973 fatcat:q6jrovp4jnbqjeicqfpjo2una4

State of the art and trends in speech coding

R.J. Sluijter, F. Wuppermann, R. Taori, E. Kathmann
1995 Philips Journal of Research  
a recital of the most important measures of coding performance.  ...  The paper, which primarily deals with narrowband speech coding systems, is concluded by a review of the state of affairs and an outline of the future trends in the area of wideband speech coding.  ...  The delay requirements imposed on a speech coding system, often specified in terms of intrinsic 'algorithmic delay' and hardware-dependent 'implementation delay', depend on the specific application, and  ... 
doi:10.1016/0165-5817(96)81591-9 fatcat:lzgivkduc5hfrhj752ucmteaim
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