By reducing coding rate , more speech signals can be transferred in the same channel . so , low bit rate speech coding has especially important significance when the transmission rate is limited very strictly 通过降低编码速率,可以使同样的信道容量能够传输更多路的语音信号,在传输比特限制十分严格的场合,低速率语音编码具有特别重要的意义。
Based on the discrete digital model , this paper briefly recount some basic terms and principles in low rate speech processing , focus on the research in the lineal predictive coding and narrate some key technologies in detail 本文从语音信号产生的离散数学模型出发，简要叙述了低速率语音编码的基本原理。然后文章对线性预测编码声码器的一些关键技术进行了详细的论述。
Some new methods are presented in this paper to improve the quality of harmonic excited linear predictive ( help ) coding which telecommunication and signal processing laboratory in beijing polythenic university develop 本文以北京工业大学通信与信号处理研究室开发的2 . 4kb s谐波激励线性预测( help )低速率语音编码算法为基础，针对进一步提高语音质量的问题，研究了一系列改进方法。
The paper expatiates design of the practice apply system using the ambe arithmetic , and introduces the correlation field and applied range about voice ' s digital signal process . and talks about the superiority of low speed voice ' s vocoder 本论文主要研究了应用ambe算法，进行实际的应用系统设计，介绍了语音数字信号处理涉及到的研究领域，应用范围，语音高效编解码低速率的优势。
By choosing non - hybrid dictionary , blocking artifacts of dct system can be avoided ultimately . the cost of coding motion information is reduced , so the visual quality of images at low bit - rates is improved . 4 而且，通过选择非晶格结构的字典(原子函数之间允许重叠) ，从根本上避免了低速率dct系统带来的方块边缘失真，增加估计的精度，减少对运动信息编码耗费并提高在低速率下的视觉效果。
Information technology - telecommunications and information exchange between systems ; local and metropolitan area networks ; specific requirements - part 15 . 4 : wireless medium access control and physical layer specifications for low - rate wireless personal area networks lr - wpans 信息技术.系统间远程通信和信息交换.局域网和城域网.特殊要求.第15 . 4部分:低速率无线个人区域网用无线媒体访问控制和物理层规范
As an important field , which influences the quality of ip phone , the quality of speech codec becomes the focus of research . the g . 729 is an 8kbit / s speech - coding standard issued by the international telecommunications union ( itu ) G . 729是国际电信联盟( itu )颁布的编码速率为8kbit s的低速率语音压缩编码标准，它采用了共轭结构算数码本激励线性预测( cs - acelp )技术，可以达到32kbit s的adpcm的语音质量。
The scada system based on gprs has a even more broader application scope that is applicable to almost all sorts of data transition operations with middle or low rate in any environment , such as internet access , personal information , finance , traffic and so on 基于gprs的scada系统具有更为广泛的应用范围，几乎任何环境的所有中低速率的数据传输业务都可以适用，如internet接入、个人信息、金融、交通等。
Low bit - rate speech coding techniques play an important role in application where bandwidth and power are limited , such as personal communication system etc . g . 729 ( cs - acelp ) has been selected by itu - t as 8kb / s speech coder standard 低速率语音编码技术在带宽与功耗有限的应用中，如个人通讯系统，占有很重要的地位。 g . 729 (代数共扼结构码激励线性预测cs - acelp )被国际电信联盟( itu )确定为8kb s语音编码标准。
The multi - resolution schemes are based on the idea of predicting an initial estimate at the coarse level and refining the estimate at the fine level . this helps in reducing the search space . the proposed algorithm consists of three resolution levels 在讨论低速率视频传输的特点和深入分析经典块匹配运动估计算法与视频序列图像的特征后，提出了一种改进算法：基于时空相关性的多分辩率自适应运动估计算法。
