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adpcm编码
相关语句
  adpcm coding
     Interframe ADPCM Coding Based on MSEP of Last Field
     利用前场预测均方误差的帧内ADPCM编码方法
短句来源
     This paper proposes a new method of interframe ADPCM Coding based on MSEP of last field, which gives design parameters of three predictors and five quantizers by five typical image.
     本文给出一种新的利用前场预测均方误差的帧内ADPCM编码方法,该方法根据五幅典型图象,给出三种预测器,五种量化器的设计参数。
短句来源
     When the PSP and LPC predictor are used respectively in an ADPCM coding system with 4 bits/sampie, a better reconstruction speech Can be got by means of PSP algorithm.
     在一个采用4比特量化器的ADPCM编码系统中,进一步比较PSP预测器和LPC预测器时,也发现前者可获得更高的话音质量。
短句来源
  “adpcm编码”译为未确定词的双语例句
     Overall Design of the 60-Channel ADPCM Transcoder Equipment
     60路ADPCM编码转换设备总体设计
短句来源
     60-Channel ADPCM Transcoder Prototype Equipment Testing and Results Analysis
     60路 ADPCM编码转换设备性能测试与结果分析
短句来源
     The Hardware of 60-Channel ADPCM Transcoder Equipment
     60路ADPCM编码转换设备硬件电路
短句来源
     Based on the feasibility study and the analysis to the encryption algorithm,the paper presents a method of the real-time multi-point voice communication in network,which uses ADPCM and UDP.
     在对加密算法实现过程进行可行性研究和分析的基础上,阐述了应用ADPCM编码调制技术和UDP协议进行网络环境下实时多点语音通信的方法。
短句来源
     The hardware architecture of 60-channel ADPCM Transcoder Equipment is introduced in this paper. It shows that the specifications of CCITT Recommenda- tions G.
     本文报道了60路 ADPCM 编码转换设备科研样机的硬件结构、功能和原理,论证了本科研样机可以实现 CCITT G.
短句来源
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     In this thesis, we implemented the algorithm of speech compression coding in recommendation G.
     本论文从ADPCM编码基础理论出发,实现了G.
短句来源
     The Hardware of 60-Channel ADPCM Transcoder Equipment
     60路ADPCM编码转换设备硬件电路
短句来源
     texture coding;
     纹理编码 ;
短句来源
     DIGITAL CODING OF SPEECH SIGNALES
     语音编码
短句来源
     Firstly, the thesis introduces the algorithm theory of ADPCM.
     其次,本文在对ADPCM G.
短句来源
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  adpcm code
The microphone was sampled at 4KHz and output an 8-bit value which was compressed to a 4-bit, 3-bit or 2-bit ADPCM code.
      


This paper proposes a new method of interframe ADPCM Coding based on MSEP of last field, which gives design parameters of three predictors and five quantizers by five typical image. Using MSSE of last field as control information, the method can be used to the coding of many sources of image.

本文给出一种新的利用前场预测均方误差的帧内ADPCM编码方法,该方法根据五幅典型图象,给出三种预测器,五种量化器的设计参数。由于利用了前场的预测均方误差做为控制信息,因此,该编码方法能够较好地匹配于多种图象源。

The ADPCM is a better method to compress the transmission code-rate of digital speech signals. It can notice both the transmitted quality and the complexity of equipment. In this paper,,several adaptive techniques for the ADPCM system,their principles,the basic algorithms and the designs will be discussed. A few algorithms are simulated on a digital computer. As far as certain specific speech frames are concerned, the adaptive quantizer with forward (AQF) transmission of step size has about segmental SNR gains...

The ADPCM is a better method to compress the transmission code-rate of digital speech signals. It can notice both the transmitted quality and the complexity of equipment. In this paper,,several adaptive techniques for the ADPCM system,their principles,the basic algorithms and the designs will be discussed. A few algorithms are simulated on a digital computer. As far as certain specific speech frames are concerned, the adaptive quantizer with forward (AQF) transmission of step size has about segmental SNR gains of 3 to 6dB compared to the fixed quantizer.

本文介绍了几种用于ADPCM编码系统的自适应技术及其原理、算法和设计,并通过微机模拟作了比较。就某些特定的语音帧而言,前馈自适应量化器与固定量化器相比较,大约可得到 3~6dB的分段(帧)信噪比增益。对于自适应预测器,若采用基于MMSE准则的自相关法确定最佳预测系数(包括反向自适应),系数是稳定的。但如果用梯度法确定最佳预测系数,则需要仔细地选择公式中的一些参数,否则,对某些特定的语音帧,可能使系统不稳定。

A new algorithm for prediction of speech signals——pattern search prediction (PSP) method will be intreduced in this paper. We have made theoretical and experimental investigations of various sources of error in the application of PSP. The tests for speech signals have shown that PSP produces the normalized mean—square error (NMSE) comparable with those of the conventional linear predictor, but somewhat different in pattern. The luther experimental results have gone into the conclusion: For the vowels, specially...

A new algorithm for prediction of speech signals——pattern search prediction (PSP) method will be intreduced in this paper. We have made theoretical and experimental investigations of various sources of error in the application of PSP. The tests for speech signals have shown that PSP produces the normalized mean—square error (NMSE) comparable with those of the conventional linear predictor, but somewhat different in pattern. The luther experimental results have gone into the conclusion: For the vowels, specially for the nasals, PSP has better predictive performance than that of LPC. When the PSP and LPC predictor are used respectively in an ADPCM coding system with 4 bits/sampie, a better reconstruction speech Can be got by means of PSP algorithm.

本文将报告一种预测语音信号的新算法——模式搜索预测(Pattern Search Prediction)方法。各种误差源的理论分析和实验工作已经做了。对语音信号的测试结果表明,PSP方法产生的均方预测误差可与傅统的线性预测(LPC)方法产生的均方误差相比拟,但对于各种元音,尤其是对于鼻音,PSP方法具有更好的预测性能。在一个采用4比特量化器的ADPCM编码系统中,进一步比较PSP预测器和LPC预测器时,也发现前者可获得更高的话音质量。

 
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