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DTMF5410
- DTMF 编解码器在编码时将击键或数字信息转换成双音信号并发送,解码时在收到的DTMF 信号中检测击键或数字信息的存在性.采用ccs2.2开发。运行在DES5410APP-U开发版上。 子程序_start_ac01,完成AD 及DSP 的多通道缓冲串口(McBSP)初始化。 子程序_iir_to_dtmf,通过由函数set_freq_coff()初始化的系数,分别迭代运算产生行 频和列频,该子程序计算出的两个频率信号样本值分别放入累加器a 和b,相加之 后作为新的一个音频样本发送
VOIP
- VOIP编码,实现PC上的语音通话功能,类似QQ语音。本代码需要至少两个电脑测试功能,其中一个作为服务器-VOIP coding, to achieve PC voice calls over the function, similar to the QQ voice. The code requires at least two computer test functions, one as a server
G720_1
- G.720.1是ITU-T最新制定的语音标准,其主要包括活动话音检测、语音和噪声分类功能,可以适用与宽带和窄带语音。-G.720.1 is a newly developed speech standard ITU-T, which mainly includes a voice activity detection, voice and noise classification function can be applied with both broadband and narrowband
FIRfillter
- 进一步理解FIR滤波器的线性相位特性,熟悉四种线性相位FIR滤波器的幅频特性、相频特性和零点分布情况。 2.掌握用窗函数法设计FIR数字滤波器的原理及方法,了解各种窗函数对滤波器性能的影响。 3. 掌握用频率采样法设计FIR数字滤波器的原理及方法,了解不同的采样点数和不同的过渡带点数对滤波器性能的影响。-Further understanding of the characteristics of linear phase FIR filter, familiar four linear
Bandwidth-Selection-for-Nonparametric-Distributio
- The mean-square efficiency of cumulative distribution function estimation can be improved through kernel smoothing. We propose a plug-in bandwidth rule, which minimizes an estimate of the asymptotic mean integrated squared error.
pitch_estimation
- 对语音信号的基音进行估计,使用归一化互相关函数的基音估计算法,估计准确度较高。-On the pitch of the speech signal is estimated using a normalized cross-correlation function of the pitch estimation algorithm with an estimated accuracy is higher.
yinpingshiyan
- 分别取长度N=160和N’=N+K的矩形窗函数作用于语音信号上,首先对其进行中心削 波,比较削波前和削波后语音信号波形,并使得削波后的信号进行乘积并求和,计算延迟为0<K<160时的相关值,并且用得到的相关值来检测语音信号的基音周期,用MATLAB画出图形。 -Length N = 160 were taken and N = N+ K rectangular window function in the role of the speech signal, the f
XULIE
- 利用matlab编程,编写了一个m序列的本原多项式,并且可以利用库函数求序列的自相关-Using matlab programming, wrote a primitive polynomial m sequence, and can take advantage of the library function uation autocorrelation