共查询到19条相似文献,搜索用时 93 毫秒
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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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An architecture of entropy decoder,inverse quantiser and predictor for multi-standard video decoding
Leibo Liu Yingjie Chen Shouyi Yin Hao Lei Guanghui He Shaojun Wei 《International Journal of Electronics》2013,100(7):877-893
A VLSI architecture for entropy decoder, inverse quantiser and predictor is proposed in this article. This architecture is used for decoding video streams of three standards on a single chip, i.e. H.264/AVC, AVS (China National Audio Video coding Standard) and MPEG2. The proposed scheme is called MPMP (Macro-block-Parallel based Multilevel Pipeline), which is intended to improve the decoding performance to satisfy the real-time requirements while maintaining a reasonable area and power consumption. Several techniques, such as slice level pipeline, MB (Macro-Block) level pipeline, MB level parallel, etc., are adopted. Input and output buffers for the inverse quantiser and predictor are shared by the decoding engines for H.264, AVS and MPEG2, therefore effectively reducing the implementation overhead. Simulation shows that decoding process consumes 512, 435 and 438 clock cycles per MB in H.264, AVS and MPEG2, respectively. Owing to the proposed techniques, the video decoder can support H.264 HP (High Profile) 1920 × 1088@30fps (frame per second) streams, AVS JP (Jizhun Profile) 1920 × 1088@41fps streams and MPEG2 MP (Main Profile) 1920 × 1088@39fps streams when exploiting a 200 MHz working frequency. 相似文献
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本文主要介绍了AVS视频解码的关键技术及解码原理。针对AVS视频解码器开源代码RM52J_r1解码效率相对低下的问题,根据该开源代码设计了新的AVS解码器。实验结果表明,在保证解码质量的前提下,解码速度有了很大的提高,基本上能达到实时解码的要求。 相似文献
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AVS解码器基于SystemC的实现 总被引:2,自引:0,他引:2
介绍了AVS视频编解码标准的关键技术和新一代硬件设计语言SystemC的特点以及利用SystemC进行软硬件协同设计的方法,并在此基础上介绍了AVS视频解码器基于SystemC的设计和实现。 相似文献
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《Signal Processing: Image Communication》2009,24(4):312-323
AVS1-P2 is the newest video standard of Audio Video coding Standard (AVS) workgroup of China, which provides close performance to H.264/AVC main profile with lower complexity. In this paper, a platform-independent software package with macroblock-based (MB-based) architecture is proposed to facilitate AVS video standard implementation on embedded system. Compared with the frame-based architecture, which is commonly utilized for PC platform oriented video applications, the MB-based decoder performs all of the decoding processes, except the high-level syntax parsing, in a set of MB-based buffers with adequate size for saving the information of the current MB and the neighboring reference MBs to minimize the on-chip memory and to save the time consumed in on-chip/off-chip data transfer. By modifying the data flow and decoding hierarchy, simulating the data transfer between the on-chip memory and the off-chip memory, and modularizing the buffer definition and management for low-level decoding kernels, the MB-based system architecture provides over 80% reduction in on-chip memory compared to the frame-based architecture when decoding 720p sequences. The storage complexity is also analyzed by referencing the performance evaluation of the MB-based decoder. The MB-based decoder implementation provides an efficient reference to facilitate development of AVS applications on embedded system. The complexity analysis provides rough storage complexity requirements for AVS video standard implementation and optimization. 相似文献
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提出了一种用于AVS视频解码器的高效流水线机制,主要模块被分为3级宏块级流水和2级块级流水,从而极大缩短了处理时间,提高了硬件利用率. 相似文献
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《Signal Processing: Image Communication》2009,24(4):247-262
Audio-video coding standard (AVS) is a working group of audio and video coding standard in China, which established in 2002. AVS-video coding standards are important parts of productions of AVS working group. Considering the different requirements of various video applications, AVS-video coding standards define different profiles, combining advanced video coding tools with trade-off between coding efficiency and encoder/decoder implementation complexity as well as functional properties. This paper provides an overview of major AVS-video coding tools and their combinations as profiles. 相似文献