编码器

From simulation results, main factors affecting the performance of Turbo code are educed, namely, interweaver length, it...

由仿真结果得出影响Turbo码性能的主要因素是交织器长度、迭代次数、编码速率。

During the design of VXI-bus Serial Controller Module, the functions of VXI-bus including time-sequence for VXI interface, resource management, interrupt process, bus arbitration, are accomplished. To advance the performance and stability, the FPGA technic is used to implement the kerneled code including serial bus time-sequence switching to VXI interface time-sequence, the UART, the Parameterized Baud Generator and"Pipeling frame". The handle type of Data Transfer Bus for VXI-bus is researched thoroughly, and the format of serial data transfer is designed.

在VXI总线串行控制器设计中，实现了VXI总线控制器的基本功能，包括VXI总线接口时序、总线仲裁、超时处理等；同时利用先进的FPGA技术实现了串行总线时序向VXI总线时序的转换、通用异步收发器、参数化波特率发生器、流水线结构等功能模块；在设计中还深入研究了VXI总线数据传输的各种操作类型，制定了串行数据传输的编码格式。

Whereas H.263 standard is used comprehensively in the video communication field, the design is based on the theory of modularization and objectization. Easy to be diplexed, the program can be applied to video player developed with H.263 standard, reducing the difficulty of developing the application software.

鉴于H.263标准在视频通信领域的广泛应用，该设计基于模块化和面向对象的思想，程序具有良好的复用性，也可以应用于采用H.263标准编码的视频文件的播放器中，降低了应用软件开发的劳动强度。

The orthograph maps coded according to certain specification and the geological interpretive maps can directly input the digital explorative apparatus linked with GPS. On the fieldwork the geo-workers can carry out real-time, high-accuracy position and then write down the description of geo-objects, thus the method can greatly reduce labour intensity, enhance the working efficiency and the mapping quality, and improve the research precision, research degree and research cycle of traditional surveying in deed.

按照一定规格编码的数字正射遥感影像地图及其地质解译图可以直接输入野外数字采集器，并与手持GPS连接，在野外现场实时高精度地定点和描述记录，从而大大降低野外地质工作者的劳动强度，提高工作效率和填图质量，真正意义上改善了传统区域地质调查的研究精度、研究程度和研究周期。

Focusing on three key issues of the efficiency of video transmission, reliability and friendship on nets, the paper conducts a deep analysis of the enhancement of the compression of video-coding layer based on H.264, the optimized assembly of the net matching layer and the ability to correct errors of the decoder and encoder. Take the package switch of IP Video information package as an example, the thesis focuses on the reflection process of the Internet RPT/UDP/IP acted on by H.264, illustrates the typica...

围绕视频传输要求高效、可靠和网络友好的三个焦点问题，深入研究H 。2 6 4标准编码层压缩性能的提升、网络适配层的无缝集成和编/解码器的容错性能；以基于包交换的IP视频信息包为例，重点分析H 。2 6 4对因特网RTP/UDP/IP协议的映射过程；阐述H 。2 6 4在视频移动通信、视频流服务、数字电视广播与存储领域的典型应用特点；指出H 。2 6 4对视频源压缩、信道有效利用、缓解视频传输瓶颈的影响和发展前景。

A simplified LLR ordering scheme employed in uncoded systems and an exact LLR ordering scheme employed in coded systems are proposed.

在未编码情况下给出使用线性检测器近似的对数似然比信息排序方法，在迭代检测解码情况下给出使用解码器反馈的比特后验信息进行对数似然比排序的方法。

These days most savvy coders will let browsers shrink-wrap their widthless floats and use a hiding hack to "feed" IE5/Mac a width for the float.

如今大多数聪明的编码人员会让阅读器伸缩其没有宽度属性的floats，并使用一个躲藏的特地给IE5/Mac的宽度学问。

Reducing the complexity of vector quantization is still a main problem. This paper presents a new algorithm of minimum distortion predicting vector quantization based on intraband and interband correlation. Here the whole distortion of the vector is predicted by the part distortion of the lower frequency coefficient components of vector, resulting in a reduction of 76 percent of complexity.

降低矢量量化器的复杂度一直是人们研究的一个主要问题，本文提出一种新的基于带间相关性的最小失真预测矢量量化算法，通过矢量中前面部分低频系数分量失真的计算去预测整个矢量的失真，编码复杂度降低了76％，而解码图像信噪比下降不到1dB。

If you don't want to have head aches with the codes, then go for VLC Player.

如果你不想有头痛的代码，然后再为可变长编码播放器。

H.264/AVC is the new generation of video coding protocol with a higher efficiency,but the by-effect is increasing the complexity of the protocol H.264 codec.Thereby it is difficult to achieve the real-time application.

论文摘要： H.264/AVC是新一代的视频压缩标准，编码的压缩率很高，但带来的副作用却是编解码器复杂度的增加，从而很难达到实时的要求。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。