查询词典 quantization

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。

A quantization process is performed using data processed by average resolution digital devices.

本发明的量化过程，可藉由一具有普通解析度的数字装置处理的数据而完成。

The main work of this dissertation is that after the conventional codebook design algorithm is used to decrease the expected distortion, evolutionary algorithm is introduced into vector quantization based on the partial distortion theorem to design the optimal codebook.

本论文的主要工作正是在利用传统码本设计算法减少平均误差的前提下，根据矢量量化的部分失真定理，引入进化算法，设计出较优的码本。

At the same time, the practical implementation of evolutionary algorithm is given in order that evolutionary algorithm is introduced into vector quantizer. In the fourth section the asymptotic theory of vector quantization is studied. Then the partial distortion theorem that when codebook size is large enough, each region of the partition makes an equal contribution to the distortion for an optimal quantizer, which is the key part of vector quantizer is obtained. Finally, the competitive learning algorithm based on the partial distortion theorem is proposed, which introduces the subdistortion of each region into the distortion measure to assure that the subdistortion of each region approximately equals to each other.

第四章详细研究矢量量化的渐近理论，然后得出了矢量量化器设计的核心部分——部分失真定理，当码本尺寸足够大且输出矢量的渐近概率密度与输入矢量的概率密度的幂成比例时，最优量化器划分的各个区域对该量化器的平均误差产生相同的影响，最后提出基于部分失真定理的竞争学习算法，它通过在误差测度中，引入与各区域相关的子误差以保证各区域的子误差近似相等，该算法实现较为简单，在一定程度上确保全局最优。

In addition, several sets of multi-layered codebooks and the quantization technique with dynamic bit allocation are adopted.

该算法还采用了多套多层结构的码书和动态位分配的向量量化技术。

The paper gives a quantization method of Electric Arc Furnace activity analysis and evaluation using data envelopment analysis.

将数据包络分析DEA引入电炉冶炼作业的分析评价，给出了适用的定量化分析方法。

A fast encoding algorithm based on the Mean Square Error distortion for vector quantization is introduced.

研究了一种基于均方误差测度的矢量量化快速编码算法。

In accordance with the actual project, this paper fully considers the comprehensive factors of speaker recognition system on the basis of explaining speaker recognition's principle, such as recognition rate, recognition speed, system stability etc. LPCC is used as the feature parameter. LPCC can reflect the esthesia feature of human in pronunciation and has offered a group of succinct speech signal model parameters which signify the range of frequency spectrum of the speech signal more accurately and the operation amount is not comparatively big. Combined vector quantization technology, the speech searched system has been developed.

本文依拖实际项目，在阐述说话人识别原理的基础上，充分考虑说话人识别系统的识别率、识别速度、稳定性等综合因素，采用能够反映人对语音的感知特性的线性预测倒谱系数LPCC 作为特征参数，LPCC 的重要性还在于，它提供了一组简洁的语音信号模型参数，这一组参数较精确地表征了语音信号的频谱幅度，而分析它们所需的运算量相对来讲却不大；同时结合矢量量化技术，成功开发出语音检索系统。

This can be done either through Dirac's canonical quantization or Feynman's path integral.

可以做到这一点可以通过狄拉克的典型量化或费曼的路径积分。

During the migrating and optimizing process of targeted platform, this paper starts with the analysis on complexity of H.264/AVC algorithms, carries on plenty of tests, uses a series of optimizing methods aiming at the special hardware resources of PWBSP-16 platform: optimizing modules including SAD Calculate, Integer Transform and Quantization in the instruction level by using FIRtree instruction set; optimizing it by improving coding process and enabling co-processor such as VLx、DMA in system level by the thinking of modules parallelism maximizing; putting forward the future optimizing mind in the level of algorithms.

在目标平台的移植优化过程中，本文从H.264/AVC编码算法的复杂度分析入手，进行了大量的测试分析，并针对PWBSP-16 DSP处理器特殊的硬件资源，采取了如下一系列的优化策略：在指令级方面，采用FIRtree指令集对SAD计算、整型变换、量化等主要耗时模块进行优化；在系统级方面，采用模块并行最大化的思想，通过改进编码流程，启用VLx、DMA等协处理器等方法进行优化；在算法级方面，提出后续的优化思路。

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。