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ITU-T G.728

Coding of speech at 16 kbit/s using low-delay code excited linear prediction

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Organization: ITU-T
Publication Date: 1 June 2012
Status: active
Page Count: 212
scope:

Introduction

This Recommendation contains the description of an algorithm for the coding of speech signals at 16 kbit/s using low-delay code excited linear prediction (LD-CELP). This Recommendation is organized as follows.

In clause 2 a brief outline of the LD-CELP algorithm is given. In clauses 3 and 4, the LD-CELP encoder and LD-CELP decoder principles are discussed, respectively. In clause 5, the computational details pertaining to each functional algorithmic block are defined. Annexes A, B, C and D contain tables of constants used by the LD-CELP algorithm. In Annex E the sequencing of variable adaptation and use is given. Finally, in Appendix I information is given on procedures applicable to the implementation verification of the algorithm.

Under further study is the future incorporation of three additional appendices (to be published separately) consisting of LD-CELP network aspects, LD-CELP fixed-point implementation description, and LD-CELP fixed-point verification procedures.

Document History

May 26, 2014
Coding of speech at 16 kbit/s using low-delay code excited linear prediction
A description is not available for this item.
ITU-T G.728
June 1, 2012
Coding of speech at 16 kbit/s using low-delay code excited linear prediction
Introduction This Recommendation contains the description of an algorithm for the coding of speech signals at 16 kbit/s using low-delay code excited linear prediction (LD-CELP). This Recommendation...
May 1, 2006
Coding of speech at 16 kbit/s using low-delay code excited linear prediction Amendment 1: Revised Annex J – Variable bit-rate operation of LD-CELP mainly for voiceband-data applications in DCME
A description is not available for this item.
February 1, 2000
Coding of Speech at 16 kbit/s Using Low-Delay Code Excited Linear Prediction Annex G: kbit/s Fixed Point Specification Corrigendum 1 Series G: Transmission Systems and Media, Digital Sytems and Networks Digital Transmission Systems - Terminal Equipments - Coding of Analogue Signals by Methods Other than PCM
A description is not available for this item.
September 1, 1999
Coding of Speech at 16 Kbit/s Using Low-Delay Code Excited Linear Prediction Annex J: Variable Bit Rate Operation of LD-CELP Mainly for Voiceband-Data Applications in DCME Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Coding of Analogue Signals by Methods Other Than PCM
A description is not available for this item.
May 1, 1999
Coding of Speech at 16 Kbit/s Using Low-Delay Code Excited Linear Prediction Annex H: Variable Bit Rate LD-CELP Operation Mainly for DCME at Rates Less Than 16 Kbit/s - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Coding of Analogue Signals by Methods Other than PCM
A description is not available for this item.
May 1, 1999
Coding of Speech at 16 Kbit/s Using Low-Delay Code Excited Linear Prediction Annex I: Frame or Packet Loss Concealment for the LD-CELP Decoder Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Coding of Analogue Signals by Methods Other than PCM
A description is not available for this item.
November 1, 1995
Speech Performance - General Aspects of Digital Transmission Systems (Study Group 15) 7 pp
A description is not available for this item.
July 1, 1995
Programs and Test Sequences for Implementation Verification of the Algorithm of the G.728 16 kbit/s LD-CELP Speech Coder - Series G: Transmission Systems and Media, Digital Systems and Networks - Digital Transmission Systems - Terminal Equipments - Coding of Analogue Signals by Methods Other Than PCM
A description is not available for this item.
November 1, 1994
Coding of Speech at 16 kbit/s Using Low-Delay Code Excited Linear Prediction Annex G: kbit/s Fixed Point Specification General Aspects of Digital Transmission Systems
A description is not available for this item.
September 1, 1992
Coding of Speech at 16 kBit/s Using Low-Delay Code Excited Linear Prediction General Aspects of Digital Transmission Systems; Terminal Equipments
A description is not available for this item.

References

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