查询词典 demultiplex

A kind of real time conversion method fulfilled by the multithread pipeline scheme algorithm is proposed. According to format characteristics of VOB file in the DVD, each link in conversion the file format—demultiplex, code and multiplex, is improved.

因此我们提出了一种多线程流水调度算法，根据VOB文件特点，对文件格式转换的解复用、编码、复用等环节进行优化，较好地实现了DVD文件、VCD文件转换到MPEG2文件的混合无掉帧实时播放。

The circuit encoding, data serialized methods and construction in the fiber transmission system are briefly described. The multiplex/demultiplex of parallel data and their different encoding function were realized by choosing a serializer/deserializer circuit with parallel input.

简述了光纤传输中线路编码、数据串行化的方法和构成，通过选择一种大位宽的串行器/解串行器电路，实现并行数据的复用/解复用以及不同的编码功能。

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。

MPEG-2; Transport Stream; Demultiplex; Hardware; Low-power

MPEG-2；传输流；解复用；硬件；低功耗

An apparatus for bit stream buffering and demultiplexing for a DVD Audio decoder system uses one demultiplexer to demultiplex both audio program stream and audio still video program stream.

本发明公开一种用于DVD音频解码系统的位流缓冲和多路分用设备，其使用一个信号分离器对音频程序流和音频静止视频程序流进行多路分用。

Based on the models presented above, this paper provides the new design of the E1 to VC-4 mapping Application Specific Integrated Circuit that named MXLO21E1-3. The innovations of the chip are listed below.(1) One chip can fulfill 21 E1 tributaries to demultiplex and multiplex from and to two VC-4 buses that transfer in different directions (2) Put forward the new design scheme which combined the ADM system with TM system (3) Adopted the advanced pointer processor which remarkably restrain the output wander (4) Timing recovery is realized in the chip, which reduce the peripheral circuits The characters listed above made the MXLO21E1-3 advanced in the scale, system performance, and application allover the world.

在所建立的SDH系统集成模块概念的基础上，本文提出了一个新的SDH映射芯片MXLO21E1-3的方案设计，该方案创新性的特点在于：（1）单片实现21个E1双总线映射，其功能相当于目前国际应用最多的同类芯片的5倍（2）实现分插复用器ADM和终端复用器TM合二为一的系统设计（3）采用先进的指针处理，显著减小漂移（4）片内E1定时提取，进一步减少外围电路上述特点使该芯片在功能规模上，系统性能和应用上都具有国际领先水平。

Because the expensive tunable laser is not available in laboratory, the high-luminosity halogen lamp is considered as the multiplex photosource, at results, the cost become lower and the program keep more practicable. A experimental scheme of 16 channels wave demultiplex based on volume holographic technology is designed, and its channel capacity, noisiness, cut-in loss, isolation and storage persistence are analyzed.

采用高亮度溴钨灯代替价格昂贵的大功率可调谐激光器作为波长解复用试验的光源进行设计，有效降低实验成本，设计出基于体全息技术的16通道波分解复用器的实验方案，并分析该器件的信道容量、噪声特性、插入损耗、隔离度以及存储持久性等主要性能指标。

It can be used in SDTV or HDTV stream multiplex in real time. Furthermore the technology of CBR multi-program multiplexing is researched. It presents inserting the PSI information and designwith the input and output buffer. It proposes the methods of using reconstructed the null packet to recover the PCR information when demultiplex and by utilizing modification PCR to remove the dithering of PCR when multi-program multiplex processing.

研究了基于CBR方式的多节目复用技术，给出了多节目复用PSI信息的维护和输入输出Buffer的设计，提出了采用空包重建的方式将多节目TS流解复用为单一的携有原有PCR信息的TS流以及利用PCR修正实现多节目复用PCR抖动的校正，并对帧平移法统计复用进行了研究，给出了仿真结果及性能。

It supportselementary MPEG streams or it can demultiplex program streams. It also supports 4:3 or 16:9 aspect ratios, NTSC and PAL video formats and MPEG, AC-3, DTS, WAV, AIFF file formats.

支持基本的 MPEG 流，也支持 4：3 或者 16：9 方面比率，美国国家电视系统委员会和好友录象格式化和 MPEG，AC-3， DTS， WAV， AIFF 文件格式。

With the advancement of DWDM (dense wavelength division multiplexing) technologies, key parts of DWDM apparatus have been greatly developed. Fabry-Perot thin film filters, regarded as multiplex/demultiplex components, have been used extensively.

随着光通信DWDM关键器件技术的愈加成熟，作为DWDM中的复用/解复用器件——法-伯(Fabry-Perot)薄膜窄带滤光片得到了很大发展。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。