A low-power oriented architecture for H.264 variable block size motion estimation based on a resource sharing scheme

In the Advanced Video Coding (AVC) standard, motion estimation (ME) adopts many new features to increase the coding performances such as block matching algorithm (BMA), motion vector prediction (MVP) and variable block size motion estimation (VBSME). However, VBSME is utilized in the MPEG4-AVC/H.264 standard which leads to high computational complexity and data dependency that make the hardware implementation very complex.     

H.264视频编码新标准及性能分析

重点介绍了视频编码新标准H.264/MPEG4-10 AVC的关键技术，并用该标准与H.262,H.263,MPEG-4等标准在性能上进行了分析比较。     

对H.264/AVC FRExt的研究

H.264/AVC是由ISO/IEC与ITU-T组成的联合视频组(JVT)制订的新一代视频编码压缩标准,于2003年5月完成制订.介绍了H.264的扩展部分FRExt的技术特点, 详尽描述和分析了H.264 FRExt中新的编码工具,指出了其优越性和特点,并针对相应的H.264解码器的设计提出了一些建议.     

新一代运动图像压缩标准H.264/AVC

H.264/AVC是ISO/IECMPEG与ITU-TVCEG共同制订的新一代图像编码标准,它具有更高的压缩性能。文章介绍H.264/AVC图像编解码系统的实现过程,并对其采用的新技术进行描述。     

视频压缩编码国际标准综述

国际标准化组织和国际电信联盟制定了一系列视频压缩编码国际标准,有H.261,MPEG1,MPEG2, H.263, MPEG4和H.264等.该文分别对这些标准的技术特征和性能进行分析,并详细描述H.264中采用的视频编码新技术.     

H.264视频压缩关键技术及其应用前景

ISO/IEC和ITU-T联合制定的H.264标准,标志着视频压缩技术的最新进展.H.264视频编码新标准采用一系列最新的压缩技术,提高了压缩率.该文重点介绍了视频编码新标准H.264的关键模块,并阐述了它在数字电视、高清晰度电视以及移动通信等方面的应用前景.     

SVC-based multisource streaming for robust video transmission in mobile ad hoc networks

Emerging noninfrastructure-based network types like mobile ad-hoc networks (MANETs) are becoming suitable platforms for exchanging/sharing real-time video streams, because of recent progress in routing algorithms, throughput and transmission bit-rate. MANETs are characterized by highly dynamic behavior of the transmission routes and path outage probabilities. In this article a multisource streaming approach is presented to increase the robustness of real-time video transmission in MANETs. For that, video coding as well as channel coding techniques on the application layer are introduced, exploiting the multisource representation of the transferred media. Source coding is based on the scalable video coding (SVC) extension of H.264/MPEG4-AVC with different layers for assigning importance for transmission. Channel coding is based on a novel unequal packet loss protection (UPLP) scheme, which is based on Raptor forward error correction (FEC) codes. While in the presented approach, the reception of a single stream guarantees base quality only, the combined reception enables playback of video at full quality and/or lower error rates. Furthermore, an application layer protocol is introduced for supporting peer-to-peer based multisource streaming in MANETs     

The H.264 Video Coding Standard

The H.264 video coding standard, also known as MPEG AVC, represents the state of the art in video compression. This article provides an overview of the H.264 standard. To help the reader understand the similarities and differences between it and MPEG-2 (and other hybrid video coding standards), the author describes the H.264 features and compare them to functionally similar MPEG-2 features     

一种H.264运动估计器的VLSI设计

MPEG4AVC／ITU—T H．264视频编码标准中所采用的多模式运动估计算法与传统的MPEG4、H．263 高级预测模式相比较而言，编码效率和性能都大大提高。但其诸如模式决策等问题却给运动估计器，特别是硬件运动估计器带来非常大的运算复杂度。本文提出一种H．264运动估计器硬件结构，它采用了新的模式决策算法和快速运动估计算法。仿真结果证明，这两种算法不但能使运动估计器降低其硬件实现成本，而且能减少模式决策和运动估计的时间。     

H.264/AVC视频编码标准的技术特点及应用分析

H.264／AVC是ITU-T视频编码专家组和ISO／IEC运动图像专家组(MPEG)共同开发出来的最新视频编码标准,它具备许多新的技术特点,如:多模式运动预测、柔性宏块排序、整数变换、一致性变字长编码、内容自适应二进制算术编码、分层编码、错误约束机制、错误掩盖技术及高效的比特流切换技术等等。本文在阐述该标准系统层结构的基础上,分析其主要技术特点及H.264／AVC VBR码流特性,阐述该标准在IP网络及无线网络中的应用情况。     

视频编码新标准——H.264

本文介绍了由ITU－T的VCEG和ISO／IEC的MPEG联合制定的视频编码新标准－－H.264，重点描述了H.264中所采用的视频编码新技术。     

Introduction to the High-Efficiency Video Coding Standard

The high-efficiency video coding(HEVC) standard is the newest video coding standard currently under joint development by ITU-T Video Coding Experts Group(VCEG) and ISO/IEC Moving Picture Experts Group(MPEG).HEVC is the next-generation video coding standard after H.264/AVC.The goals of the HEVC standardization effort are to double the video coding efficiency of existing H.264/AVC while supporting all the recognized potential applications,such as,video telephony,storage,broadcast,streaming,especially for large picture size video(4k × 2k).The HEVC standard will be completed as an ISO/IEC and ITU-T standard in January 2013.In February 2012,the HEVC standardization process reached its committee draft(CD) stage.The ever-improving HEVC standard has demonstrated a significant gain in coding efficiency in rate-distortion efficiency relative to the existing H.264/AVC.This paper provides an overview of the technical features of HEVC close to HEVC CD stage,covering high-level structure,coding units,prediction units,transform units,spatial signal transformation and PCM representation,intra-picture prediction,inter-picture prediction,entropy coding and in-loop filtering.The HEVC coding efficiency performances comparing with H.264/AVC are also provided.     

H.264/AVC中的SP/SI帧技术

SP/SI帧是最新的视频压缩标准ITU-T H.264(也称ISO/IEC MPEG-4/Part 10-AVC)中定义的两种新类型帧.探讨了SP帧技术的主要特性,即使使用不同的预测参考帧也能解码恢复出相同的SP帧;介绍了一般与SP帧联合使用的SI帧技术;分析了SP帧在流间切换、拼接和随机接入等应用中取代I帧的原理.通过仿真结果表明,在提供相同功能时SP帧的编码效率远远高于I帧.     

H.264/AVC在视频监控系统中的应用

H.264/AVC是由国际电信联盟(ITU)和国际标准化组织(ISO)共同制定的新一代视频编码标准,首先指出目前采用其他标准设计视频监控系统的不足,介绍和分析H.264/AVC采用的新编码技术,最后根据视频监控系统的特点,主要讨论H.264/AVC在视频监控应用中涉及的关键技术,包括SP/SI帧技术和分层编码技术。     

Advances in the scalable amendment of H.264/AVC

To support clients with diverse capabilities, ISO/IEC MPEG and ITU-T form a joint video team (JVT) to develop a scalable video coding (SVC) technology that uses single bitstream to provide multiple spatial, temporal, and quality (SNR) resolutions, thus satisfying low-complexity and low-delay constraints. It is an amendment of the emerging standard H.264/AVC and it provides an H.264/AVC-compatible base layer and a fully scalable enhancement layer, which can be truncated and extracted on-the-fly to obtain a preferred spatio-temporal and quality resolution. An overview of the adopted key technologies in the SVC and a comparison in coding efficiency with H.264/AVC are presented     

H.264并行视频编码的分配机制的研究

H.264作为新的视频压缩标准,采用了许多先进的算法,提供了很好的视频压缩质量。获得出色压缩效果和质量的代价是压缩编码算法复杂度的增加。为了寻求更高的编码速度,集群并行计算被运用到H.264的视频编码计算中。本文结合并行算法设计,通过对H.264视频编码的研究,分析了H.264可实现并行计算的任务单元选择;采用了片（Slice）级的H.264并行编码计算方法,并对其性能进行了测试和分析。     

H.264编码技术和发展趋势

自2003年推出H．264视音频编解码标准以来，H．264迅速在Internet网和视音频领域得到普及与推广。阐述H．264的定义、H．264编码技术的主要特点与改进及其应用前景和发展趋势。     

Mode-Dependent Templates and Scan Order for H.264/AVC-Based Intra Lossless Coding

In H.264/advanced video coding (AVC), lossless coding and lossy coding share the same entropy coding module. However, the entropy coders in the H.264/AVC standard were original designed for lossy video coding and do not yield adequate performance for lossless video coding. In this paper, we analyze the problem with the current lossless coding scheme and propose a mode-dependent template (MD-template) based method for intra lossless coding. By exploring the statistical redundancy of the prediction residual in the H.264/AVC intra prediction modes, more zero coefficients are generated. By designing a new scan order for each MD-template, the scanned coefficients sequence fits the H.264/AVC entropy coders better. A fast implementation algorithm is also designed. With little computation increase, experimental results confirm that the proposed fast algorithm achieves about 7.2% bit saving compared with the current H.264/AVC fidelity range extensions high profile.     

H.264/AVC的精度范围扩展

H.264/AVC标准增加了精度范围扩展Frext部分,提高了HD编码效率,改善了视频质量,扩大了其应用范围,同时对编解码器设计提出了更高要求.介绍Frext的基本框架和编码工具,并与JPEG2000、MPEG-2在高清视频图像压缩性能进行对比,进一步说明Frext具有好的编码性能.     

H．264标准在视频监控系统中的应用

介绍新一代视频编码标准H.264所采用的各种新技术以及在视频监控方面的应用.这些新技术都是对以前标准的重大改进,使得H.264与H.263、MPEG-4相比,在压缩能力方面取得了显著的提高,将运动图像压缩技术向前推进了一大步,在视频监控领域有着很广阔的市场前景.