共查询到19条相似文献,搜索用时 125 毫秒
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AVS使我国在数字化音视频产业有标可循 数字音视频编解码技术标准(AVS,Audio and Video coding Standard)是我国具备自主知识产权的第二代信源编码标准.国际上音视频编解码标准主要有两大系列:ISO/IEC JTC1制定的MPEG系列标准;ITU针对多媒体通信制定的H.26x系列视频编码标准和G.7系列音频编码标准.1994年由MPEG和ITU合作制定的MPEG-2是第一代音视频编解码标准的代表,也是目前国际上最为通行的音视频标准. 相似文献
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AVS和AVS+
AVS是数字音视频编解码技术标准(Audioand Video Coding Standard)的简称.属于电子信息技术视听信息信源编码技术.目前音视频产业可以选择的信源编码标准有四个:MPEG-2、MPEG-4、MPEG-4AVC、AVS。从制订者分,前三个标准是由MPEG专家组完成的,第四个是我国自主制定的。从发展阶段分,MPEG-2是”第一代”信源标准,其余三个为”第二代”标准。 相似文献
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着重描述了AVS的技术特点,包括AVS视频编解码框架、AVS视频编码的核心技术、AVS视频码流层次结构以及AVS图像质量主客观评价。还对视频编码的主要技术指标与国际同类标准MPEG4/AVC进行了比较。以AVS为核心的数字视频产业链"技术→专利→标准→芯片与软件→整机与系统制造→数字媒体运营与文化产业"正在形成,AVS同MPEG 4/AVC正在同台竞争下一代视频压缩标准。 相似文献
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《Signal Processing: Image Communication》2009,24(4):300-311
AVS1-P2 is a recently completed video compression standard developed by the Audio and Video Coding Standard (AVS) Workgroup of China. The standard promises comparable compression efficiency to the H.264/MPEG-4 AVC video codec with lower implementation complexity and royalty fees. AVS1-P2 is the Chinese next generation national video coding standard with an increasing amount of industrial importance as it is being required for different applications and services. It is expected that AVS1-P2 will be prominent in emerging Chinese digital video application markets, especially for personal video recorder (PVR) and video on demand (VOD).This paper discusses how trick modes for PVR and VOD can be performed with AVS1-P2 content. It begins with generating an index table to facilitate AVS1-P2 trick modes followed by a discussion of basic and advanced trick modes. Next, the minimum decoder speed and display frame buffer requirements are analyzed for smooth trick play, especially for 1× rewind. VOD stream delivery strategies for various trick modes and transitions are then discussed. Finally, an overview of other topics that may affect implementation such as content protection and encoding is provided. Many of the discussions are also applicable to other video coding standards like MPEG-2, H.264/AVC, etc. 相似文献
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AVS中的音视频编码压缩技术 总被引:6,自引:1,他引:6
介绍了音视频编码标准AVS中的主要技术特点,对AVS标准所采用的主要技术进行了综述,给出了AVS视频标准与MPEG-4 AVC/H.264编码器性能的比较和分析,讨论了AVS的发展前景. 相似文献
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以数字音视频编码技术标准(Audio Video coding Standard,AVS)为依据,通过对该算法全过程的分析,并结合FPGA硬件平台的结构特点,设计了预测、DCT变换和反DCT变换、量化和反量化、熵编码的全过程。利用FPGA开发工具ISE10.1和仿真工具ModelSim SE 6.2b,并通过Xilinx公司xc5vlx110t-1ff1136平台验证,完成了AVS编码标准P帧从设计到实现的全过程。填补了AVS编码器P帧在FPGA上未实现的空白,同时促进了AVS在FPGA上的发展,并对AVS+和AVS 2发展起到关键性作用。 相似文献
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Euee S.Jang 《中兴通讯技术(英文版)》2012,(2):19-24
Recent advances in reconfigurable computing have led to new ways of implementing complex algorithms while maintaining reasonable throughput.Video codecs are becoming more complex in order to provide efficient compression for video with ever-increasing resolution.This problem is compounded by the fact that spectra of video decoding devices has become wider in the move from traditional TV to cable and satellite TV,IPTV,mobile TV,and Internet media.MPEG is tackling this problem with a reconfigurable video coding(RVC) framework and is standardizing a modular definition of tools and connections.MPEG’s work started with video coding and has recently extended to graphics data coding.RVC will be supported by non-MPEG standards such as the Chinese audio-video standard(AVS).This article gives a brief background to the reconfigurable codec framework.The key to this framework is reconfigurability and reducing granularity to find commonality between different standards. 相似文献
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