共查询到20条相似文献,搜索用时 125 毫秒
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无线网络的未来将转向融合系统,支持用于蜂窝、Wi.Fi、DTV、白色空间(whitespace)等应用的最严苛的通信标准,灵活的统一平台是必不可少的。业内领先的硅产品知识产权(siP)平台解决方案和数字信号处理器(DSP)内核授权厂商CEVA公司,日前推出完全可编程的低功耗DSP架构框架CEVA.XC4000。 相似文献
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CEVA公司和NXPSoftware公司日前共同宣布,将合作提供适用于智能手机市场的增强型高清(enhancedHD)语音处理解决方案。这款方案集成了NXPSoftware市场领先的LifeVibesVoiceExperience软件和包括CEVA—TeakLite一4的CEVA—TeakLite系列DSP内核。 相似文献
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硅产品知识产权(SIP)平台解决方案和数字信号处理器(DSP)内核的全球领先授权厂商CEVA公司宣布,推出一款用于先进高清晰(HD)音频应用的完整单核解决方案,名为CEVA—HD-Audio^TM。这一可配置和可编程的平台能够满足家庭娱乐和消费产品(包括蓝光DVD、DTV、机顶盒及其他家庭A/V设备)最严苛的音频要求。 相似文献
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新一代视频编码标准HEVC(High Efficiency Video Coding)主要面向高清及超高清视频编码,压缩效率相比之前的编码标准H.264有较大提高.但压缩效率的提高必然会带来计算的复杂化,为提高HEVC的解码效率,降低时延,提出了一种并行解码器架构.该并行解码器的设计是基于HEVC中熵片(Entropy slice)和波前并行处理(Wavefront Parallel Processing, WPP)技术的引入以及滤波器(Deblocking Filter)无相关性的特点.实验结果表明,该并行解码器能够充分利用硬件资源,提高解码效率. 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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提出了一种高效的低密度奇偶校验码(LDPC)译码方法,相对于传统译码方法,仅需增加少量存储量便能获得接近2 倍的吞吐率增益.本文将修正的最小和算法与分组双向消息传递(STMP)译码算法相结合,提出了基于最小和的分组双向消息传递算法(MS-STMP),并给出了相应的迭代交叠方案.随后讨论了交叠过程中2 种运算单元对存储器的访问.最后以中国地面数字电视传输(DTTB)标准中使用的一组LDPC 码为例,计算了MS-STMP 算法相对于传统双向消息传递(TPMP)算法的吞吐率增益和额外增加的存储量.计算结果表明,MS-STMP 算法平均增加44%的存储量,而将吞吐率平均提高到1.85 倍,相对于交叠(OMP)算法有明显的优势. 相似文献
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C. Goktug Gurler Anil Aksay Gozde Bozdagi Akar A. Murat Tekalp 《Signal Processing: Image Communication》2010,25(5):325-334
3D video based on stereo/multi-view representations is becoming widely popular. Real-time encoding/decoding of such video is an important concern as the number and spatial/temporal resolution of views increase. We present a systematic method for design and optimization of multi-threaded multi-view video encoding/decoding algorithms using multi-core processors and provide benchmark results for real-time decoding. The proposed multi-core decoding architectures are compliant with the current MVC extension of H.264/AVC international standard, and enable multi-threaded processing with negligible loss of encoding efficiency and minimum processing overhead. Benchmark results show that multi-core processors and multi-threading decoding are necessary for real-time high-definition multi-view video decoding and display. 相似文献
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为了提高CAVLC解码器的解码速率,提出了一种优化的CAVLC解码器结构,主要包括level解码模块和RunBefore解码模块。level解码模块采用伪并行的结构解码幅值,实现了半个周期解码一个幅值;采用RunBefore与level快速合并的方法,在RunBefore解码完成的同时形成残差系数。建立了该优化结构的RTL模型,并验证了其功能的正确性。利用Xilinx公司的ISE13.3对该设计进行综合,结果显示该设计可以支持1 080 p高清视频的实时解码。 相似文献
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描述了基于AD I公司的B LACKFIN系列高速DSP芯片实现的视频编解码系统,从系统框架和数据结构的角度介绍了如何对视频编解码系统进行构建和优化;阐述了多处理器在实际应用中的同步和通信问题。实验结果表明,该设计方案简洁有效地实时实现了H.263国际视频压缩标准。 相似文献
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模拟视频信号解码既是视频应用的重要部分,又是后级数字信号处理的基础。为了适应于便携式设备的发展,研究了一种以TI公司的视频解码芯片TVP5150为核心、MSP430F2013单片机为控制器件的低功耗视频解码模块。单片机控制TVP5150的I^2C总线以及与PC机的串口通信。文中主要阐述了系统硬件设计、PC机与单片机通信软件设计(包括PC机部分和单片机部分)、单片机I^2C总线控制软件设计以及模块输出信号的说明等。本模块的模拟视频信号解码为符合ITU-R BT656标准的数字YCbCr信号,具有良好的应用前景。 相似文献
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Lin C.-C. Chen J.-W. Chang H.-C. Yang Y.-C. Yang Y.-H. O. Tsai M.-C. Guo J.-I. Wang J.-S. 《Solid-State Circuits, IEEE Journal of》2007,42(1):170-182
In this paper, a low-cost H.264/AVC video decoder design is presented for high definition television (HDTV) applications. Through optimization from algorithmic and architectural perspectives, the proposed design can achieve real-time H.264 video decoding on HD1080 video (1920 times 1088@30 Hz) when operating at 120 MHz with 320 mW power dissipation. Fabricated by using the TSMC one-poly six-metal 0.18 mum CMOS technology, the proposed design occupies 2.9times2.9 mm2 silicon area with the hardware complexity of 160K gates and 4.5K bytes of local memory 相似文献
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IEEE802.16e标准定义的准循环低密度奇偶校验(LDPC)码是一种线性分组码。针对LDPC码校验矩阵的稀疏准循环特性,对基于部分并行结构的归一化最小和(NMS)译码算法进行了研究,给出了译码信息量化和信息交换的方法。通过数值仿真验证了译码算法在高斯信道中的译码性能,并利用现场可编程门阵列(FPGA)对该译码算法进行了实现。 相似文献