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有线数字电视系统包括编解码、复用和传输等多个环节,系统庞大,涉及的技术指标很多,如果没有掌握关键参数,就无法保证数字信号质量和整个系统的稳定性,所以对这些关键技术参数进行解析是非常必要的。MPEG-2 TS流参数主要包括TR101290测试标准3级错误检测、PSI/SI信息解析、TS流 相似文献
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论述有线电视数字信号髑流的形成以及TS流的结构,并对数字信号的复用和解复用的原理和过程进行了分析,解析MPEG-2的PSI以及DVB—C系统的SI相关要点。 相似文献
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介绍了节目特定信息和业务信息(PSI/SI)的组成和作用,对与地面数字电视机顶盒接收和管理PSI/SI信息过程相关的解复用模块和节目数据库模块作重点阐述,分析基于STi5105芯片的解复用原理,描述了节目数据库模块与解复用、用户操作模块之间的交互关系。 相似文献
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本文介绍了MPEG-2系统层中TS流结构,以及与其相关的PSI信息,详细阐述了复用、解复用器的功能和实现,最后指出了复用及解复用器实现中的所遇到的问题和解决方法。 相似文献
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介绍了基于软件实现的MPEG-2传输流复用器的多路TS流复用软件总体结构、对多种TS流中的信息提取和节目特殊信息PSI合成,以及软件复用中的多线程编程和节目时钟参考PCR的修正问题. 相似文献
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1引言MPEG-2TS流的参数监测和特性分析包括ETR290标准的3级错误监测、PSI/SI信息分析、TS流语法分析、PCK分析及缓冲区分析等。本文主要介绍ETR标准的3级错误监测。 相似文献
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Willis N.P. Bresler Y. 《IEEE transactions on information theory / Professional Technical Group on Information Theory》1997,43(1):190-207
We consider the sampling of bandlimited spatiotemporal signals subject to the time-sequential (TS) constraint that only one spatial position can be sampled at any given time. Using the powerful techniques of lattice theory, we develop a new unifying theory linking TS sampling with generalized multidimensional sampling. The results have a geometric nature, involving simultaneous packing of the spectral and spatial supports in their respective domains. We provide a complete characterization of TS lattice patterns, and, extending the study to temporally nonuniform patterns, analyze their minimum and average temporal sampling rates. Unlike previous studies of TS sampling, our results apply to very general multidimensional spatial and spectral supports. We present tight bounds on the temporal parameters of those TS sampling patterns that produce zero aliasing error. The use of a TS sampler for bufferless source coding of spatiotemporal signals is considered as an attractive possibility 相似文献
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TS流(传输流)主要用来传输数字电视的视频节目、音频节目和一些用户信息,它是以包的方式存在的,一个包一般为188或204字节。IP是英文IntemetProtocol(因特网协议)的缩写,以下所说的IP主要是指以太网络和部分IP协议。TSOVERIP就是将rrS流在以太网上传输,并遵循一定的IP协议。主要讨论基于FPGA实现数字电视传输流(Ts)在以太网上传输模块的实现方法,并详细分析了各个子模块的具体功能与实现过程,该模块具有集成度高和配置灵活的特点。 相似文献
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The implementation of TS MAC system for KOREASAT DBS (direct broadcast satellite) system is presented. This TS MAC controls and monitors the status of the TS equipment and gathers the alarm for them. The advantage of this system is the center-concentrated, real time processing, remote control, and object oriented module decomposing 相似文献
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UDA1341TS在触摸式语音电子菜单系统中的应用 总被引:1,自引:0,他引:1
研究支持IIS总线数据结构的音频芯片UDA1341TS及其在基于S3C2410X中的语音应用。首先介绍S3C2410X中的IIS音频总线接口,并针对S3C2410X中的IIS总线接口,研究了音频芯片UDA1341TS的引脚功能和运行机制。在此基础上,给出UDA1341TS在基于S3C2410X的触摸式语音电子菜单系统中的软硬件设计方案,设计并实现了播音、录音、播放等功能。音频芯片UDA1341TS功耗低,电压小,非常适合于嵌入式系统中语音系统的开发。 相似文献
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Hao Ying 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》1999,29(2):290-298
The Takagi-Sugeno (TS) fuzzy modeling technique, a black-box discrete-time approach for system identification, has widely been used to model behaviors of complex dynamic systems. The analytical structure of TS fuzzy models, however, is unknown, causing at two major problems. First, the fuzzy models cannot be utilized to design controllers of the physical systems modeled. Second, there is no systematic technique for designing a controller that is capable of controlling any given TS fuzzy model to achieve the desired tracking or setpoint control performance. In this paper, we provide solutions to these problems. We have proved that a general class of TS fuzzy models is a nonlinear time-varying ARX (Auto-Regressive with eXtra input) model. We have established a simple condition for analytically determining the local stability of the general TS fuzzy dynamic model. The condition can also be used to analytically check the quality of a TS fuzzy model and invalidate the model if the condition warrants. We have developed a feedback linearization technique for systematically designing an output tracking controller so that the output of a controlled TS fuzzy system of the general class achieves perfect tracking of any bounded time-varying trajectory. We have investigated the stability of the tracking controller and established a condition, in relation to the stability of non-minimum phase systems, for analytically deciding whether a stable tracking controller can be designed using our method for any given TS fuzzy system. Three numerical examples are provided to illustrate the effectiveness and utility of our results and techniques 相似文献
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TS201S型DSP引导程序加载方法研究 总被引:1,自引:0,他引:1
介绍ADI公司TigerSHARC系列DSP的引导程序加载原理与应用.给出TigerSHARC系列DSP程序加载的几种模式,主要以TS201S型DSP为例说明单DSP系统程序加载的过程和方法.该设计在TigerSHARC系列DSP中具有通用性,可以方便地应用于其他DSP引导程序加载的设计. 相似文献
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首先介绍基于NIOSⅡ的数字电视复用器的设计原理,在此基础上提出一种基于网络控制芯片LAN91C111的复用器远程监控和EPG信息插入的方案,并将它与现有各种方案进行比较,该方案的优势在于:将系统监控和EPG信息插入在同一控制软件中实现,并且使用一台主机可以控制多台复用器,系统集成度高、成本低,有很强的实用性,最后详细说明该方案的实现原理。 相似文献