排序方式: 共有18条查询结果,搜索用时 15 毫秒
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基于TMS320DM642的X264视频编码器的优化 总被引:1,自引:1,他引:0
简单介绍了TMS320DM642数字信号处理器的硬件构成,简要给出了DSP平台的程序优化一般流程.着重研究了TMS320DM642平台优化X264视频编码器,包括算法与系统结构优化,乒乓缓存优化,循环体的优化以及DSP汇编实现. 相似文献
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介绍了一种基于H.264格式压缩的监控视频检索系统,该系统基于对象和语义,主要包括视频分析和视频检索两大模块.通过视频分析模块,对H.264压缩域视频解码并进行视频对象提取、分割、特征提取和对象匹配等分析过程,将得到的视频对象及特征信息存入至对象特征数据库;在视频检索模块端,用户可以通过输入语义信息或示例图片直接从特征数据库中进行视频检索查询,避免了视频的重复处理.实验表明,通过提出的系统可以快速有效地进行视频检索. 相似文献
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This paper presents the design and implementation of a current self-adjusted VCO with low power consumption. In the proposed VCO, a bottom PMOS current source instead of a top one is adopted to decrease the tail noise. A current self-adjusted technique without additional external control signals is taken to ensure the VCO starts up in the whole band while keeping the power consumption relatively low. Meanwhile, the phase noise of the VCO at the low frequency (high Cvar) can be reduced by the technique. The circuit is implemented in 0.18 μm CMOS technology. The proposed VCO exhibits low power consumption of 〈1.6 mW at a 1.5 V supply voltage and a tuning range from 11.79 to 12.53 GHz. The measured phase noise at 1 MHz offset from the frequency 11.79 GHz is-104.7 dBc/Hz, and the corresponding FOM is -184.2 dBc/Hz. 相似文献
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