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Description: H.263视频编码
对于ITU-T H.263视频压缩标准的介绍: 概念, 特征和实现
1. 介绍
H.263标准是由国际电信联盟(ITU)发布的,对视频会议和视频电信应用提供视频压缩(编码).在这个指南中,我们会介绍关于H.263的概念和特征,并描述一些实现的实例.
-H.263 video coding for the ITU-T H.263 video compression standard introduction : Concepts, features and achieve a. H.263 standard is introduced by the International Telecommunication Union (ITU) released, for video conferencing and video telecommunications applications for video compression (encoding). in this guide, we will introduce H.263 on the concept and characteristics, and describes some examples of achievement.
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Description: ASN．1（Abstract Syntax Notation One）是由ITU－T制定的，符合以上三点要求。它定义的编码规则（如BER、PER）就相当于从局部语法到传送语法之间的转换规则。目前，很多网络协议的消息格式都是用ASN．1句法描述的，并指明了采用何种编码规则。在协议的具体实现时，我们必须在发送方设置一个ASN．1编码器，将发送方所要传送的消息经ASN．1编码后再发送出去；然后在接收方设置一个ASN．1解码器，将接收到的经ASN．1编码的消息解码为符合接收方局部语法的消息格式。由于ASN．1已经成为国际化的标准，这样，经ASN．1处理的信息独立于任何应用环境，就不会因为应用环境的不同而引起二义性的解释。
ITU－T专门讲述ASN．1的共有20个协议：X．680～X．699（还不包括较老的X．208和X.209），内容相当丰富，也非常复杂。本文的任务不在于讲述ASN．1规定的诸多名词和冗长繁杂的编码细节，而只是对BER和PER的要点做简要介绍，并将它们对比起来进行研究-ASN. 1 (Abstract Syntax Notation One) by the ITU-T developed, consistent with the above three requirements. It defined coding rules (such as BER, PER) from the local grammar equivalent of transmission conversion between the grammar rules. At present, many of the news network protocol format is used ASN. A description of the syntax and specify what the coding rules. The agreement is a concrete realization, we must set up a sender ASN. An encoder, the sender will have to transmit information via the ASN. After a code sent; The receiver then set up an ASN. A decoder that will receive by the ASN. A coding information for decoding receiver with the local news format syntax. As ASN. One has become international standards, so that by ASN. An independent processing of information in any applicatio
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Author: kong |
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Description: 基于ARM7TDMI的SoC片内AC97模块和片外CODEC-UCB1400，采用ITU-T的G.721算法设计语音处理系统 提出一种基于低端RISC核的语音系统设计方案。该方案结合SoC的片内eSRAM模块进行性能优化；通过在流片后的实际样机上验证，编码速率为19.88 KB/s，解码速率为22.68 KB/s，达到了语音实时性要求。-ARM7TDMI-based SoC chip AC97 module and off-chip CODEC-mated 00. using the ITU-T G.721 algorithm design voice processing system based on a low-end RISC-nuclear voice EC design. The solutions combine SoC chip modules eSRAM performance optimization; Flow-through in the actual prototype tested, coding rate of 19.88 KB/s and decoding rate of 22.68 KB/s achieve real-time voice requirements.
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Author: 李瑶 |
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Description: ITU-T Recommendation G.729
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Description: Joint Video Team (JVT) of ISO/IEC MPEG & ITU-T VCEG
(ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6)
6th Meeting: Awaji, Island, JP, 5-13 December, 2002
-Joint Video Team (JVT) of ISO/IEC MPEG
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Author: 清波楼 |
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Description: ITU 的T.30标准文档.T.30标准定义了三类传真机的传输标准。-ITU standards documents. 7-9-2 standard definition of the three types of fax transmission standards.
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Description: ITU-T H.323 V3
音频codec（支持静音检测）
g.723.1 6.4kbps发送，6.4/5.3kbps接收
g.729a 8kbps发送，8kbps接收（仅在单一模式下可用）
gsm 6.10 10kbps
lpc 10 3kbps
g.711 uLaw/aLaw 64kbps
视频codec（动态流量控制）
h.261 支持QCIF(176*144)/CIF(352*288)
h.263 支持QCIF(176*144)/CIF(352*288) -- 需要VISh263m.dll的支持，该动态连接库随VIS H.323 DLL Library一同发布
标准H.323网守(Gatekeeper)支持
ILS(Internet Locator Service)支持
-ITU-T H.323 V3 Audio codec (Support quiet detection) g.723.1 6. 4kbps sending, receiving g.729a 6.4/5.3kbps bps sent, k receiver (only in a single mode available) gsm 6.10 10kbps lpc 10 3kbp 's g.711 uLaw/aLaw 47,060 video codec (dynamic flow control) h.26 a support QCIF (176* 144)/CIF (352* 288) h.263 support QCIF (176* 144)/CIF (352* 288)-- needs the support VISh263m.dll holders. The dynamic link library DLL with the VIS Library H.323 standard with the release of H.323 Gatekeeper (G atekeeper) support ILS (Internet Locator Service) support holders
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Author: wushuang |
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Description: ITU-T标准G.729源代码
、这么多还不行阿？-ITU-T G.729 standard source code, it is not enough for so many A?
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Author: adsfdsf |
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Description: ITU-T发布的音频编解码协议g.723.1源码，欢迎交流-ITU-T released the audio codec agreement g.723.1 source, the exchange of welcome
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Author: 丁丽 |
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Description: Draft ITU-T Recommendation and Final Draft International Standard of Joint Video Specification(ITU-T Rec.H.264 | ISO/IEC 14496-10 AVC)
H.264编码标准，主体部分是中英文对照-Draft ITU-T Recommendation and Final Draf t International Standard of Joint Video Specif ication (ITU-T Rec.H.264 | ISO/IEC 14496-10 AV C) H.264 coding standard, the main part of the bilingual
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Author: 王景国 |
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Description: 本课题的任务是开发遵循ITU-T的H.323协议的IP电话终端系统:IPT 2000。课题组选用了PalinMicro公司的单芯片低成本VoIP开发平台来进行开发.-this topic is the development of the mandate to follow the ITU-T H.323 IP phone terminal system : IPT 2000. The discussion group chosen PalinMicro the low-cost single-chip VoIP development platform for development.
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Author: 周东 |
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Description: The Scalable Video Coding(SVC) draft specification version 8 was released by Joint Video Team(JVT) on Oct,2006. JVT is formed by ISO/IEC MPEG & ITU-T VCEG. -The Scalable Video Coding (SVC) draft spec ification version 8 was released by Joint Video Team (JVT) on Oct, 2006. JVT is formed by the ISO/IEC MPEG
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Author: 高強 |
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Description: lpc语音编码 ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of
telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of
the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing
Recommendations on them with a view to standardizing telecommunications on a worldwide basis.-lpc speech coding ITU (International Telecommunic ation Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Secto r (ITU-T) is a permanent organ of the ITU. The ITU- T is responsible for studying technical, operating and tariff questions and issuing Rec ommendations on them with a view to standardizi Vi telecommunications on a worldwide basis.
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Author: 凌风 |
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Description: SIP 协议是下一代网络中的接口协议之一，属于应用控制协议。本标准是以
IETF 和ITU-T 的相关标准为基础，结合中国电信网络的实际情况，并综合中国
电信集团公司对下一代网络的实验成果制定的。-SIP is the next generation network interface protocol, application control agreements belong. The standard is based on the IETF and the ITU-T standards for the relevant infrastructure and, in light of China's actual telecommunications network, Comprehensive and China Telecom network for the next generation of experimental results enacted.
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Author: 马箫摩 |
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Description: 基于TMS320VC5402实现ITU-T G.723.1建议-Implementation of ITU-T G.723.1 recommendation
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Author: weixin |
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Description: The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard for
the coding (compression) of natural video images. The new standard [1] will be known as H.264 and
also MPEG-4 Part 10, “Advanced Video Coding”. This document describes the methods of filtering
reconstructed blocks in an H.264 CODEC. Note that the H.264 draft standard is not yet finalised and
so readers are encouraged to refer to the latest version of the standard.-The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard forthe coding (compression) of natural video images. The new standard [1] will be known as H.264 andalso MPEG-4 Part 10,
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Author: woyun |
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Description: The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard for
the coding (compression) of natural video images. The new standard [1] will be known as H.264 and
also MPEG-4 Part 10, “Advanced Video Coding”. This document describes the transform and
quantization processes defined, or implied, by the standard.-The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard forthe coding (compression) of natural video images. The new standard [1] will be known as H.264 andalso MPEG-4 Part 10,
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Author: woyun |
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Description: The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard for
the coding (compression) of natural video images. The new standard [1,2] will be known as H.264 and
also MPEG-4 Part 10, “Advanced Video Coding”. This document describes the methods of predicting
intra-coded macroblocks in an H.264 CODEC.-The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard forthe coding (compression) of natural video images. The new standard [1,2] will be known as H.264 andalso MPEG- 4 Part 10,
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Author: woyun |
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Description: The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard for
the coding (compression) of natural video images. The new standard [1] will be known as H.264 and
also MPEG-4 Part 10, “Advanced Video Coding”. This document introduces the concepts of
Switching P and I slices, part of the Extended Profile of H.264.-The Joint Video Team (JVT) of ISO/IEC MPEG and ITU-T VCEG are finalising a new standard forthe coding (compression) of natural video images. The new standard [1] will be known as H.264 andalso MPEG-4 Part 10,
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Author: woyun |
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Description: ITU-T G.729语音压缩算法。
description:
Fixed-point description of commendation G.729 with ANNEX B Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) with Voice Activity Decision(VAD), Discontinuous Transmission(DTX), and Comfort Noise Generation(CNG).-ITU-T G.729 voice compression algorithms. description: Fixed-point description of commendation G.729 with ANNEX B Coding of Speech at 8 kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) with Voice Activity Decision (VAD), Discontinuous Transmission ( DTX), and Comfort Noise Generation (CNG).
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Author: kevin |
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