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Abstract - In this paper, proposed an efficient method of converting speech codec formats between G.723.1 and G.729А. The proposed method is composed of four steps: LSP conversion, pitch conversion, adaptive codebook search and fixed codebook search. Subjective results shown that the proposed method has shorter delay than classical tandem method. ( Abstract- In this paper, proposed an efficient method of converting speech codec formats between G.723.1 and G.729А. The proposed method is composed of four steps: LSP conversion, pitch conversion, adaptive codebook search and fixed codebook search. Subjective results shown that the proposed method has shorter delay than classical tandem method. )

《matlab 宝典》源代码，很实用，希望对大家有帮助，呵呵！(" Matlab Collection" source code, it is practical, we want to help, huh, huh!)

Calculating objective speech intelligibilty

先对语音信号进行采集、播放，分析其频谱，对该信号源添加噪声，再播放音频并分析频谱，然后分别通过IIR低通、带通滤波器和FIR低通、带通滤波器，分别播放音频和得到滤波后的频谱。(Firstly， voice signal acquisition, play, analyze its spectrum to add noise to the signal source, and then play the audio spectrum analysis, and then were by IIR low-pass, band-pass filter and FIR low-pass, band-pass filters, respectively, play audio and get the spectrum after filtering.)

实现了用LSB嵌入水印，还有两种水印分析方法：X2和信息量分析法(Achieved using LSB embedding the watermark, there are two kinds of watermarks analysis methods: X2 and the amount of information analysis)

Emmanuel C. Ifeachor的《Digital Signal Processing》（数字信号处理）的配套MATLAB源代码。该书涵盖了音频、多媒体、和电信领域的信号处理应用。(C. Emmanuel Ifeachor "Digital Signal Pro cessing "(digital signal processing) supporting MATLAB code. The book covers the audio, multimedia, and telecommunications in the field of signal processing applications.)

一个多用户检测器的matlab代码程序 采用m序列作为扩频码 非常不错(very good)

灰色verhust模型的matlab程序在给定一组序列的情况下求得其预测值，残差，相对误差(Gray verhust model matlab program to obtain their predictive value, residuals, the relative error in the sequence of a given set of circumstances)

音频频谱的分析程序,在程序中实现了采样速率的提取(Audio spectrum analysis procedures, the procedures to achieve a sampling rate of extraction)

信号分析示例，包括时域、频域、均方根谱、功率谱、对数谱分析结果，均有相应的图示和注释说明。(Signal analysis of sample, including time domain, frequency domain, the RMS spectrum, power spectrum, the logarithmic spectrum analysis results, have corresponding diagrams and notes.)