One of main services in mobile communication is speech and the key technology is the coding and decoding of speech signal.
语音业务一直是移动通信中的主要业务之一，其中最关键的技术就是语音信号的编码与解码。
By the debugging, the coding of speech is realized; m sequence is produced. Moreover, the spread of signal frequency spectrum is realized.
通过调试实现了语音的编码、产生了m序列，并实现了信号频谱的扩展。
As one of the current most potential low bit rate speech coding schemes, waveform interpolation model with its high performance has been paid more and more attention.
波形内插语音编码模型作为当今最具潜力的低速率语音编码方案之一，因其良好的性能，越来越受到人们的重视。
First, the algorithm is used to design the codebook of the speech coding parameters.
首先，采用改进的模拟退火算法设计语音编码参数矢量量化码本。
Now waveform coding synthesis technology is one of the most important speech synthesis method, it can produce natural and articulate speech.
波形拼接合成是当今语音合成的重要方法，能够产生高清晰度及高自然度的合成语音。
This paper analyzes the limitation of fixed gain quantization in G. 728 speech coding algorithm and proposes an adaptive quantization scheme with exact gain.
本文分析了G . 728语音编码算法增益固定量化的缺陷，设计了精确表示增益的自适应量化方案。
We utilize GAs to search stimulative code word in CELP when we have had the knowledge of speech signal coding and GAs.
在具备了语音信号编码和遗传算法的基本知识后，将遗传算法运用于CELP的码字搜索。
The paper investigates the capability of extension of characteristic waveform interpolation (CWI) algorithm to wideband speech coding.
考察了特征波形内插(CWI)算法对于宽带语音编码的扩展能力。
In the environment of speech coding application, especially in military applications, the vocoders quality in noisy environment needs to be improved.
在语音编码的应用环境中，特别是在军事应用中，强噪声环境下声码器性能的改进是一个亟待解决的问题。
Speech coding is the foundation of digital transmission and storage of speech.
语音编码是实现语音数字化传输和存储的基础。
The fundamental of speech coding is the fact that how to get better quality of reconstructed speech and ensure the less time delay and proper operational complexity at the given coding rate.
语音编码的基本问题就是在给定编码速率的条件下如何得到尽可能好的重建语音质量并保证尽可能小的编解码时延和适当的运算复杂度。
In the research of mixed excitation linear prediction speech coding, a new real-time normalized correlation function pitch detection algorithm is proposed.
在混合激励线性预测低速率语音编码研究中，提出了一种新的归一化自相关函数实时基音检测算法。
A frequency domain technique is presented to be used in speech coding to improve the performance of low order linear prediction (LP) in modeling of formants of voiced speech.
讨论了一个用于语音编码的频域技术，用以在浊音语音共振峰模型方面改善低阶数线性预测(LP)的性能。
Using presently successfully CELP speech coding method to compress the synthetic unit, under the ratio of 20, can still have high articulation synthetic speech.
采用目前较成功的CELP语音编码方法对合成单元进行压缩，在压缩20多倍的情况下仍能保证合成语音的高清晰度。
In the digital processing of speech signals, speech coding technique is most important.
在语音信号数字处理过程中，语音编码技术是至关重要的。
In the meantime, we evaluate and analyze objectively the robustness of the low bit rate speech coding algorithms with our own objective evaluating system of the speech quality.
并利用所构建的语音质量客观评价平台，对语音增强低速语音编码算法的抗背景噪声性能进行了客观评估与分析。
In the study of MBE speech coding, a new efficient practical look-back and look-ahead pitch tracking smoothing algorithm is presented based on the dynamic programming approach.
在多带激励低速率语音编码研究中，本文依据动态规划技术原理，提出了一种有效而实用的前后各看一帧的双向基音跟踪平滑算法。
In this paper, developments of speech compression coding are briefly introduced, and importance is attached to recent advances in speech coding at low bit rates.
本文简要介绍了语音压缩编码的新进展，并且着重介绍低码率语音编码在新近几年所取得的进展。
The decomposition algorithm of the characteristic waveform interpolation(WI) speech coding is investigated. A novel WI speech coding algorithm based on pitch synchronization is proposed.
研究了在特征波形语音编码算法中的特征波形分解算法，提出了一种基于基音同步的特征波形内插语音编码算法。
The mobile communication system can furthest fulfill its function if variable rate speech coding is adopted, and the very core of this coding is the adaptive technology.
在移动通信系统中采用变速率语音压缩编码，可以最大限度地发挥系统的效能，而变速率语音编码的核心技术就是自适应技术。
At present, MPEG2 has become the most prevalent coding technique, which is mainly used for the transmission of speech data and viewdata.
MPEG2是目前应用最广泛的一种编码技术，主要用于语音，图像数据传输。
The accurate description of track model and excitation model is the key of the Medium-low rate speech coding.
如何准确的建立声道模型和激励模型成为中低速语音编码的关键。
With the rapid development of communication technique, the speech coding is gradually updating from narrow band to wideband.
随着通信技术的飞速发展，语音编码技术也逐渐从窄带过渡到宽带。
And medium-low rate speech coding methods have advantages and flaws in describing excitation, and can't describe all kinds of speech excitation perfectly.
另一方面，在中低速语音编码方法中，各种激励各有所长，但都不能很好的描述所有类型的语音激励。
Experiments show that high quality speech coding systems can be realized by utilizing the characteristics of speech signals.
实验表明，利用语音信号本身特征，达到高压缩比同时具有较高合成语音质量是可能的。
This paper introduces briefly the principle and classification of the speech coding technology, and makes analysis on and comparison with the performance of several common speech coding algorithms.
介绍了语音编码技术的原理和分类，对几种常用语音编码算法进行了性能分析和比较。
The optimization method proposed in this paper is valuable to the DSP implementation of other speech coding standards.
该优化设计方法对其它语音编解码标准的DSP实现具有较大的参考价值。
With the continuously increasing of the demand of high quality of speech in telecommunication field, the technology of speech coding has been rapidly developed recently.
由于语音通信领域对高质量语音需求日益增加，语音编码技术也在近年来得到了飞速发展。
The speech coding algorithm, the hardware architecture and work flow of the vocoder system, software implementation and code optimization are introduced.
介绍了语音编解码算法原理、声码器系统的硬件结构、工作流程以及软件实现与代码优化。
The speech coding algorithm, the hardware architecture and work flow of the vocoder system, software implementation and code optimization are introduced.
介绍了语音编解码算法原理、声码器系统的硬件结构、工作流程以及软件实现与代码优化。
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