多对多通信

As an essential component in modern wireless communication systems,bandpass filter has attracted more and more attention and got many achievements too.

当今无线通信技术的发展对电路的性能要求越来越高、种类越来越多，新的工艺和设计方法也相应层出不穷。

The data communication technology between DCS and DEH are widely used in power plants, and it makes the operation more efficient and safe with the control mode of shared operator stations for different control systems.

火电厂分散控制系统与汽轮机数字电液控制系统之间数据通信技术的应用越来越多，不同控制系统通过共享操作员站的控制方式对运行人员的操作既高效又安全。

Secondly, the platform of IPTV set-top box named DM6446 is introduced, and then the AVS video coding standard which is implemented as the video coding standard of IPTV is introduced. The kernel architecture, peripheral devices of DM6446 and the key technique of AVS video coding such as transformation, quantization, intra-prediction, inter-prediction, interpolation, and loop filter is introduced in detail. Thirdly, the system procedures of set-top box which are implemented on the ARM side of DM6446 are introduced in detail. This part focuses on the demultiplex of audio and video data, the design of data interface, the playback of audio and video, and the communication between ARM and DSP. Fourthly, the loop filter algorithm of AVS video coding standard is introduced in full detail, and the optimized procedures of the algorithm on the DSP side of DM6446 are introduced, and then the optimized results are presented. Fifthly, the thesis introduces and analyzes the state-of-art technique of deblocking filter, and proposes a deblocking method, and then the results of proposed method are given. Finally, summarize of this thesis and further development is given.

首先对IPTV技术、视频编解码技术以及去块滤波技术做了简要介绍；然后介绍了IPTV机顶盒的实现平台DM6446，并介绍了该处理器的外围接口和内核结构，同时介绍了作为本IPTV系统视频标准的AVS第二部分视频标准，以及该标准中变换量化、帧内预测、帧间预测、插值和环路滤波等多个模块的算法；接着，详细介绍了机顶盒系统相应程序在DM6446 ARM核上的实现，重点介绍了音视频系统码流的解复用、数据接口设计、音视频的播放以及ARM核与DSP核之间的通信；然后，详细介绍了AVS视频标准中环路滤波算法及该算法在DM6446 C64+内核上的优化，并给出优化结果；然后对去块滤波算法进行了研究并提出了一种环路滤波方案，同时给出了此方案的实验结果；最后总结了本文的工作，并提出了可以改进的方向。

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In order to realize the dynamically extensive function on processing business quantity ability, Intermediate Business Platform apply the multi-process model, and divide the whole system into four parts: the Communication Sub-system, the Data Package Format Conversion Sub-system, the Transaction Driving Sub-system and the System Management Sub-system.

为了实现对中间业务在业务量上处理能力的动态扩展，中间业务平台使用多进程的运行模式，将整个中间业务平台分成四个子系统——通信子系统、数据包格式转换子系统、交易驱动子系统、系统管理子系统。

After researching on the typical hierarchical routing protocol Leach algorithm, the paper combined it with multiple frames, and analyzed different kinds of parameters of sensor networks.

在研究典型的层次化路由协议Leach算法的基础上，将其与多帧通信相结合，并对传感器网络的各种参数进行分析。

Decision fusion is extensively used in multi-sensor data processing because of its merits, such as few communication data, strong fault-tolerant and low request for homogenesis of sensors.

决策融合因其通信量小、容错能力强、对传感器同质性要求低等优点而被广泛地应用于多传感器数据处理。

The wiring data records for the power communication network is getting more and more in Hengshui,and the confusional state of wiring data record have weaken the supervision,and effected the normal maintenance,construction and the efficiency of technical reconstruction directly.

针对衡水电力通信网中配线记录越来越多，因长期对该项数据记录混乱，削弱了对其监管力度，直接影响了通信设备的维护、施工和改造效率。

Through to 'the intelligent visible doorbell systems' the topic study and the design, makes me to understand the AT89C51 monolithic integrated circuit the characteristic; Further grasped the monolithic integrated circuit to carry on many machine correspondences the principle; Also locks to the electron with the video frequency, the audio frequency control recuperates the module to have the certain degree to ford into.

通过对&智能可视门铃系统&课题的学习和设计，使我了解AT89C51单片机的特性；进一步的掌握了单片机进行多机通信的原理；也对电子锁和视频、音频的控制调理模块有一定程度的涉入。

Through to %26lsquo;the intelligent visible doorbell systems%26rsquo; the topic study and the design, makes me to understand the AT89C51 monolithic integrated circuit the characteristic; Further grasped the monolithic integrated circuit to carry on many machine correspondences the principle; Also locks to the electron with the video frequency, the audio frequency control recuperates the module to have the certain degree to ford into.

通过对%26ldquo；智能可视门铃系统%26rdquo；课题的学习和设计，使我了解AT89C51单片机的特性；进一步的掌握了单片机进行多机通信的原理；也对电子锁和视频、音频的控制调理模块有一定程度的涉入。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。