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ITU-T G.729.1 (2006) Amd. 6 (03/2010)
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ITU-T G.729.1 (2006) Amd. 6 (03/2010)
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New Annex E on superwideband scalable extension
Recommendation ITU-T G.729.1 describes an 8-32 kbit/s scalable wideband speech and audio coding algorithm interoperable with ITU-T G.729, ITU-T G.729A and ITU-T G.729B.The output of the ITU-T G.729EV coder has a bandwidth of 50-4000 Hz at 8 and 12 kbit/s and 50-7000 Hz from 14 to 32 kbit/s. At 8 kbit/s, ITU-T G.729EV is fully interoperable with ITU-T G.729, Annex A/G.729 and Annex B/G.729. Hence, an efficient deployment in existing ITU-T G.729-based VoIP infrastructures is foreseen. The coder operates on 20 ms frames and has an algorithmic delay of 48.9375 ms. By default, the encoder input and decoder output are sampled at 16 kHz.The encoder produces an embedded bitstream structured in 12 layers corresponding to 12 available bit rates from 8 to 32 kbit/s. The bitstream can be truncated at the decoder side or by any component of the communication system to adjust "on the fly" the bit rate to the desired value with no need for outband signalling.The underlying algorithm is based on a three-stage coding structure: embedded Code-Excited Linear Prediction (CELP) coding of the lower band (50-4000 Hz), parametric coding of the higher band (4000-7000 Hz) by Time-Domain Bandwidth Extension (TDBWE), and enhancement of the full band (50-7000 Hz) by a predictive transform coding technique referred to as Time-Domain Aliasing Cancellation (TDAC).Amendment 1 introduces the new Annex A containing the RTP payload format, capability identifiers and parameters for signalling of ITU-T G.729.1 capabilities using ITU-T H.245. Both format and capability parameters are fully compatible with the corresponding ITU-T G.729.1 RTP definitions to allow seamless interoperability. Besides the new Annex, Amendment 1 to ITU-T G.729.1 incorporates changes needed to correct defects in ITU-T G.729.1 and provides new, more comprehensive test vectors.Amendment 2 introduces the new Annex B, which defines an alternative implementation of the ITU-T G.729.1 algorithm using floating point arithmetic to be used for implementation on DSP hardware optimized for floating-point operations. The accompanying floating point C-code is fully interoperable with the fixed-point C-code.Amendment 3 extends the low-delay functionality of main body and Annex B to the first wideband bit rate (14 kbit/s). It also incorporates changes needed to correct defects in the text and C-code of ITU-T G.729.1 main body and Annex B.Amendment 4 introduces a new Annex C specifying a discontinuous transmission (DTX) and comfort noise generation for ITU-T G.729.1. With this annex, the ITU-T G.729.1 encoder is capable of generating a silence insertion description (SID) each time an update of the ambient background noise parameters is required to maintain the quality of the generated background noise. The SID information includes a core lower band layer, which can be decoded by the decoder of Annex B/G.729, an enhancement lower band layer and a higher band layer. The non-transmission between SID updates and the small size of the SID provide a significant reduction of bandwidth during inactive segments. Besides this new annex, Amendment 4 incorporates changes needed to correct defects identified in ITU-T G.729.1 C source code (main body and Annex B), provides a revised set of test vectors, and updates the complexity figures table of ITU-T G.729.1 text.Annex D introduced by Amendment 5 provides an alternative implementation using floating point arithmetic of the discontinuous transmission (DTX) and comfort noise generation (CNG) of Annex C - which uses fixed-point arithmetic. Besides this new annex, Amendment 5 incorporates changes needed to correct defects identified in the ITU-T G.729.1 C source code for its main body and Annex B, and provides a revised set of test vectors.Corrigendum 1 addressed some problems discovered recently in the ANSI C-codes of the main body of ITU-T G.729.1 and of its Annexes B, C and D, in the so-called Release 1.5 of the code.Amendment 6 brings in new Annex E a scalable superwideband (SWB, 50-14000 Hz) speech and audio coding algorithm operating from 36 to 64 kbit/s and interoperable with ITU-T G.729 and ITU-T G.729.1.For consistency, the existing ANSI-C code for the whole of ITU-T G.729.1 is reissued as part of this publication and labelled as Release 1.6, without any additional change. Test vectors that complement this release are also available in the ITU-T test signal database at http://itu.int/net/ITU-T/sigdb/speaudio/Gseries.htm#ITU-T G.729.1.
Citation:
https://handle.itu.int/11.1002/1000/10619
Series title:
G series: Transmission systems and media, digital systems and networks
G.700-G.799: Digital terminal equipments
G.710-G.729: Coding of voice and audio signals
Approval date:
2010-03-29
Provisional name:
G.729EV
Approval process:
AAP
Status:
In force
Maintenance responsibility:
ITU-T Study Group 16
Further details:
Patent statement(s)
Development history
Associated test signals
Editions
Related Supplement(s)
Related technical papers and reports
Ed.
ITU-T Recommendation
Status
Summary
Table of Contents
Download
1.9
G.729.1 (2006) Amd. 8 (03/2013)
In force
here
-
here
1.8
G.729.1 (2006) Amd. 7 (02/2012)
In force
here
here
here
1.7
G.729.1 (2006) Amd. 6 (03/2010)
In force
here
here
here
1.6
G.729.1 (2006) Cor. 1 (08/2009)
In force
here
here
here
1.5
G.729.1 (2006) Amd. 5 (12/2008)
In force
here
here
here
1.4
G.729.1 (2006) Amd. 4 (06/2008)
In force
here
here
here
1.3
G.729.1 (2006) Amd. 3 (08/2007)
In force
here
here
here
1.2
G.729.1 (2006) Amd. 2 (02/2007)
In force
here
here
here
1.1
G.729.1 (2006) Amd. 1 (01/2007)
In force
here
here
here
1
G.729.1 (05/2006)
In force
here
here
here
ITU-T Supplement
Title
Status
Summary
Table of contents
Download
G Suppl. 4 (12/1972)
Certain methods of avoiding the transmission of excessive noise between interconnected systems
In force
-
-
here
G Suppl. 5 (10/1984)
Measurement of the load of telephone circuits under field conditions
In force
-
-
here
G Suppl. 7 (12/1972)
Loss-frequency response of channel-translating equipment used in some countries for international circuits
In force
here
here
here
G Suppl. 8 (12/1972)
Method proposed by the Belgian telephone administration for interconnection between coaxial and symmetric pair systems
In force
-
-
here
G Suppl. 17 (10/1984)
Group-delay distortion performance of terminal equipment
In force
-
-
here
G Suppl. 19 (10/1984)
Digital crosstalk measurement (method used by the Administrations of France, the Netherlands and Spain)
In force
-
-
here
G Suppl. 22 (10/1984)
Mathematical models of multiplex signals
In force
-
-
here
G Suppl. 26 (10/1984)
Estimating the signal load margin of FDM wideband amplifier equipment and transmission systems
In force
-
-
here
G Suppl. 27 (10/1984)
Interference from external sources
In force
-
-
here
G Suppl. 28 (10/1984)
Application of transmultiplexers, FDM codecs, data-in-voice (DIV) systems and data-over-voice (DOV) systems during the transition from an analogue to a digital network
In force
-
-
here
G Suppl. 32 (11/1988)
Transfer of alarm information on 60-channel transmultiplexing equipment
In force
-
-
here
G Suppl. 34 (11/1988)
Temperature in underground containers for the installation of repeaters
In force
-
-
here
G Suppl. 35 (11/1988)
Guidelines concerning the measurement of wander
In force
-
-
here
G Suppl. 36 (11/1988)
Jitter and wander accumulation in digital networks
In force
-
-
here
G Suppl. 39 (02/2016)
Optical system design and engineering considerations
In force
here
here
here
G Suppl. 40 (07/2024)
Optical fibre and cable Recommendations and standards guideline
In force
here
-
here
G Suppl. 41 (07/2024)
Design guidelines for optical fibre submarine cable systems
In force
here
-
here
G Suppl. 42 (10/2018)
Guide on the use of the ITU-T Recommendations related to optical fibres and systems technology
In force
here
here
here
G Suppl. 43 (02/2011)
Transport of IEEE 10GBASE-R in optical transport networks (OTN)
In force
here
here
here
G Suppl. 44 (06/2007)
Test plan to verify B-PON interoperability
In force
here
here
here
G Suppl. 45 (09/2022)
Power conservation in optical access systems
In force
here
here
here
G Suppl. 46 (05/2009)
G-PON interoperability test plan between optical line terminations and optical network units
In force
here
here
here
G Suppl. 47 (09/2012)
General aspects of optical fibres and cables
In force
here
here
here
G Suppl. 48 (06/2010)
10-Gigabit-capable passive optical networks: Interface between media access control with serializer/deserializer and physical medium dependent sublayers
In force
here
here
here
G Suppl. 49 (09/2020)
Rogue optical network unit (ONU) considerations
In force
here
here
here
G Suppl. 50 (09/2011)
Overview of digital subscriber line Recommendations
In force
here
here
here
G Suppl. 51 (06/2017)
Passive optical network protection considerations
In force
here
here
here
G Suppl. 52 (09/2012)
Ethernet ring protection switching
In force
here
here
here
G Suppl. 53 (12/2014)
Guidance for Ethernet OAM performance monitoring
In force
here
here
here
G Suppl. 54 (07/2015)
Ethernet linear protection switching
In force
here
here
here
G Suppl. 55 (12/2023)
Radio-over-fibre (RoF) technologies and their applications
In force
here
here
here
G Suppl. 56 (02/2016)
OTN transport of CPRI signals
In force
here
here
here
G Suppl. 57 (07/2015)
Smart home profiles for 6LoWPAN devices
In force
here
here
here
G Suppl. 59 (02/2018)
Guidance on optical fibre and cable reliability
In force
here
here
here
G Suppl. 60 (09/2016)
Ethernet linear protection switching with dual node interconnection
In force
here
here
here
G Suppl. 62 (02/2018)
Gfast certification
In force
here
here
here
G Suppl. 64 (02/2018)
PON transmission technologies above 10 Gb/s per wavelength
In force
here
here
here
G Suppl. 65 (10/2018)
Simulations of transport of time over packet networks
In force
here
here
here
G Suppl. 66 (09/2020)
5G wireless fronthaul requirements in a passive optical network context
In force
here
here
here
G Suppl. 67 (07/2019)
Application of optical transport network Recommendations to 5G transport
In force
here
here
here
G Suppl. 68 (12/2023)
Synchronization operations, administration and maintenance requirements
In force
here
here
here
G Suppl. 69 (09/2020)
Migration of a pre-standard network to a metro transport network
In force
here
here
here
G Suppl. 70 (09/2020)
Supplement on sub 1 Gbit/s services transport over optical transport network
In force
here
here
here
G Suppl. 71 (12/2023)
Optical line termination capabilities for supporting cooperative dynamic bandwidth assignment
In force
here
here
here
G Suppl. 72 (04/2021)
Modelling consideration for optical media networks
In force
here
here
here
G Suppl. 73 (10/2021)
Influencing factors on quality of experience for multiview video (MVV) services
In force
here
here
here
G Suppl. 74 (12/2021)
Network slicing in a passive optical network context
In force
here
here
here
G Suppl. 75 (12/2021)
5G small cell backhaul/midhaul over TDM-PON
In force
here
here
here
G Suppl. 76 (12/2021)
Optical transport network security
In force
here
here
here
G Suppl. 77 (06/2022)
Supplement 77 to ITU-T G-series of Recommendations - Influencing factors on quality of experience (QoE) for video customized alerting tone (CAT) and video customized ringing signal (CRS) services
In force
here
here
here
G Suppl. 78 (09/2022)
Use case and requirements of fibre-to-the-room for small business applications
In force
here
here
here
G Suppl. 79 (12/2023)
Latency control and deterministic capability over a PON system
In force
here
here
here
G Suppl. 80 (07/2024)
Use case and requirements of fibre-based in-premises networking for home application (FIP4H)
In force
here
-
here
G Suppl. 81 (07/2024)
Practical aspects of PON security
In force
here
-
here
G Suppl. 82 (07/2024)
Enhanced optical line termination with information technology functions
In force
here
-
here
G Suppl. 83 (07/2024)
Supplement on the use of options in PTP profile with full timing support from the network
In force
here
-
here
Title
Approved on
Download
Roadmap for QoS and QoE in the ITU-T Study Group 12 context (TR-RQ)
2023
here
Considerations on the use of GNSS as a primary time reference in telecommunications
2020
here
Use of G.hn in industrial applications
2020
here
Practical procedures for subjective testing
2011
here
ISDN field trial guidelines
1991
here
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