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ITU-T G.729.1 (05/2006)
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ITU-T G.729.1 (05/2006)
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مشفر معدل بتاتات لمتغير مدمج على أساس G.729: مشفر عريض النطاق متدرج kbit/s 32-8 لتدفق بتات قابل للتشغيل البيني مع G.729
تصف هذه التوصية خوارزمية تشفير كلام وسمعي عريض النطاق متدرج بين 8 وkbit/s 32 قابلة للتشغيل البيني مع G.729 وG.729A وG.729B.
إن خرج مشفر G.729EV له عرض نطاق Hz 4 000-50 عند 8 وkbit/s 12 وHz 7 000-50 من 14 إلى kbit/s 32. وعند kbit/s 8، يكون G.729EV كامل التشغيل البيني مع G.729 والملحق A/ G.729 والملحق B/G.729. ومن ثم، يتوقع النشر بكفاءة في البنيات الأساسية ﻟ VoIP القائمة على G.729 الحالية. ويعمل المشفر على أرتال ms 20 وله تأخر خوارزمية ms 48,9375. وبالتغيب، يعتني دخل المشفر وخرج مفكك التشفير عند kHz 16.
يُنتِج المشفر تدفق بتات مدمج مبني في 12 طبقة تتوافق مع 12 معدل بتات متاحة من 8 إلى kbit/s 32. ويمكن تقاسم تدفق البتات عند جانب المشفر أو بواسطة أي مكون نظام اتصالات لتعديل "on the fly" معدل البتة للقيمة المرغوبة دون حاجة إلى تشوير خارج النطاق.
إن الخوارزمية تقوم على بنية تشفير من ثلاث مراحل: توقع خطي لشفرة مستثارة مدمجة CELP)) لتشفير نطاق منخفض (Hz 4 000-50) وتشفير معلمي لنطاق أعلي (Hz 7 000-50) بواسطة تمديد عرض نطاق ميدان زمني TDBWE)) وتعزيز نطاق كامل (Hz 7 000-50) بواسطة تقنية تشفير تحويل متوقع يشار إليه باعتباره إلغاء مستعار ميدان زمني TDAC)).
يقدم التعديل 1 الملحق A الجديد الذي يحتوي على نسق حمولة نافعة RTP ومعرّفات مقدرة ومعلمات لتشوير قدرات G.729.1 باستخدام H.245. وتكون معلمات كل من النسق والمقدرة متوائمة بالكامل مع تعاريف G.729.1 RTP للسماح بقابلية للتشغيل البيني غير ملحومة. وبجانب الملحق الجديد، يتضمن التعديل 1 ﻟ G.729.1 تغييرات مطلوبة لتصحيح العيوب في G.729.1 وتوفير عوائل اختبارات جديدة وشاملة أكثر.
يقدم التعديل 2 الملحق B الجديد الذي يعرِّف تنفيذ بديل لخوارزمية G.729.1 باستخدام حساب نقطة طليقة تُستخدم للتنفيذ على عتاد DSP لأقصي حد لعمليات نقطة طليقة. وتكون النقطة الطليقة C-code المتصاحبة قابلة للتشغيل البيني الكامل مع النقطة الثابتة C-code.
Citation:
https://handle.itu.int/11.1002/1000/8825
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:
2006-05-29
Provisional name:
G.729EV
Approval process:
AAP
Status:
In force
Observation:
This edition includes the modifications introduced by G.729.1 (2006) Amd.1 approved on 13 January 2007 and G.729.1 (2006) Amd.2 approved on 13 February 2007. See G.729.1 (2006) Corrigendum 1 (2009) for the latest version of the ANSI C code for this item and its Amendments.1 and 2
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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