pcm编码们以话音信号为例来说明数字通信的基本原理。人类的语音信号的频率范围在300—3 400 Hz之间，留有一定余地，设话音信号最高频率为4 kHz，则根据奈奎斯特采样定理，将话音信号数字化所需要的采样频率为8 kHz，即采样周期为l25 US 0再把每个采样值用8位二进制数字编码，就把模拟话音信号转换成了数字信号。因此，一路话音信号转换成数字信号以后，比特率为8 x8 000 b／s：64 kb／s。将模拟信号用脉冲信号进行采样使其离散化并进行数字编码的过程称为脉冲编码调制，简称PCM，这是将模拟话音信号转换成数字信号的基本方法。
PCM stands for Pulse Code Modulation. PCM technology is a means by which standard audio signals (which are represented by waveforms) are converted to digital audio signals (which are represented by 1 s and 0 s- much like computer data) with little, or no, compression. The method of audio conversion is used on most digital audio formats, including C (2015-11-13, Visual C++, 16KB, 下载2次)
vc++ 采用c++开发的重数据库查询摄像机信息，然后实现拍照与语音对讲的功能，以组件的形式嵌套在组态里
Database query camera information, and then to take pictures and voice intercom function (2013-08-20, Visual C++, 23267KB, 下载4次)
实现用基本贝叶斯分类器进行训练，分类和识别，包含对矩阵的许多处理方法
The basic Bayesian classifier training, classification and identification, contain many processing methods for matrix (2012-10-18, Visual C++, 8870KB, 下载14次)
语音信号处理的最基本的Maylab处理程序源码，包含读入语音波形，清音浊音的检检测，加窗，过零率，短时能量，基音最大值。最后有test给出演示。
Most basic Maylab handler source speech signal processing, including reading the speech waveform, voiceless voiced seizure detection, windowing, zero crossing rate, short-term energy, the maximum pitch. Finally, the test is given demonstration. (2012-08-12, Visual C++, 30KB, 下载6次)
零,一,二,三,四,五,六,七,八,九,执行,各关节归零,大臂正转,大臂反转,小臂正转,小臂反转,手腕正转,手腕反转,手爪张开,手爪闭合,上升,下降,大臂运行,大臂负运行,小臂运行,小臂负运行,手腕运行,手腕负运行,手爪运行,手爪负运行,升降运行,升降负运行,大臂归零,小臂归零,手腕归零,手爪归零,升降归零,速度加,原点记忆,系统复位,示教盒,暂停,急停,回原点,速度减,区号加,区号减,单步再现,周期再现,连续再现,返回,继续,数据记忆,读取数据,设置串口,打开串口,关闭串口
Zero, one, two, three, four, five, six, seven, eight, nine, execution, zero, each joint big arms are turning, arm, forearm are turning, reverse wrist are turning reversely, forearm and wrist reversal, PAWS open, PAWS closed, rise, fall, arm and arm running negative operation, forearm run, forearm negative operation, wrist operation, wrist negative PAWS run, run, run, PAWS negative lifting operation, running, lifting negative big arms zero, forearm and wrist zero, zero, zero lifting PAWS zero, speed, memory, add the origin, system restoration. Teaching box, pause, urgent stop, back to the origin, speed reduction, the area code add, the area code decreased, a single step representation, continuous representation, cycle representation, returns, continue, data memory, read, setting a serial port, open a serial port, closed the serial interface
(2011-04-03, Visual C++, 3687KB, 下载14次)
语音增强是影响语音识别系统性能的重要成分。为了比较语音增强算法的性能，采用Matlab软件进行了数值仿真，对不同噪声环境下的语音用3种不同的方法进行降噪，采用信噪比、端点检测等方法来降噪效果，并对几种增强算法的性能进行了比较分析。结果表明，在变噪声环境下短时谱MMSE法最佳，谱减法和维纳滤波法各有优点。
Speech enhancement of voice recognition is an important component of system performance. In order to compare the performance of speech enhancement algorithm using the Matlab software, a numerical simulation, speech under different noise environments with 3 different methods of noise reduction, the use of signal to noise ratio, endpoint detection method to the noise reduction effect, and a few kinds of enhanced performance of the algorithm were compared. The results show that changing the noise environment in the MMSE method was the best short-term spectrum, spectral subtraction and Wiener filtering methods have their advantages. (2011-01-04, Visual C++, 368KB, 下载56次)
机器人语音控制系统
执行,各关节归零,大臂正转,大臂反转,小臂正转,小臂反转,手腕正转,手腕反转,手爪张开,手爪闭合,上升,下降,大臂运行,大臂负运行,小臂运行,小臂负运行,手腕运行,手腕负运行,手爪运行,手爪负运行,升降运行,升降负运行,大臂归零,小臂归零,手腕归零,手爪归零,升降归零,速度加,原点记忆,系统复位,示教盒,暂停,急停,回原点,速度减,区号加,区号减,单步再现,周期再现,连续再现,返回,继续,数据记忆,读取数据,设置串口,打开串口,关闭串口,
Robot voice control system implementation, the joint zero, the arm is transferred, the inversion arm, forearm is transferred, reverse forearm, wrist being transferred, wrist reversal, open gripper, close gripper, an increase , declined to run big arm, big arm negative running, running forearm, forearm negative running, wrist operations, wrist negative running, running hand, gripper negative running, landing and taking off running, running a negative take-off and landing, large arm-zero, small zero arm, wrist zero, gripper zero, zero lift, the speed increases, the starting point memory, system reset, teaching box, pause, stop, back to square one, minus the speed, add the area code, area code minus single step-by-step reproduction, reproduction cycle, continuous reproduction, back, to continue, data memory, read data, set the serial port, open the serial port, turn off the serial, (2009-03-23, Visual C++, 103KB, 下载102次)
语音识别系统 -- 机器人语音控制系统 零,一,二,三,四,五,六,七,八,九,执行,各关节归零,大臂正转,大臂反转,小臂正转,小臂反转,手腕正转,手腕反转,手爪张开,手爪闭合,上升,下降,大臂运行,大臂负运行,小臂运行,小臂负运行,手腕运行,手腕负运行,手爪运行,手爪负运行,升降运行,升降负运行,大臂归零,小臂归零,手腕归零,手爪归零,升降归零,速度加,原点记忆,系统复位,示教盒,暂停,急停,回原点,速度减,区号加,区号减,单步再现,周期再现,连续再现,返回,继续,数据记忆,读取数据,设置串口,打开串口,关闭串口 (2008-03-12, Visual C++, 100KB, 下载154次)
http://www.pudn.com/Download/item/id/414781.html
dialogic语音卡加HMP(主机媒体服务)的语音篇开发指南，对东进DN序列语音卡开发也又作用。
dialogic voice Cagayan HMP (Host Media Services), the Guide to the development of Voice articles, on the east DN series voice cards have also developed role. (2007-06-17, Visual C++, 441KB, 下载43次)
语音识别代码，机器人语音控制系统
CMDs=零,一,二,三,四,五,六,七,八,九,执行,各关节归零,大臂正转,大臂反转,小臂正转,小臂反转,手腕正转,手腕反转,手爪张开,手爪闭合,上升,下降,大臂运行,大臂负运行,小臂运行,小臂负运行,手腕运行,手腕负运行,手爪运行,手爪负运行,升降运行,升降负运行,大臂归零,小臂归零,手腕归零,手爪归零,升降归零,速度加,原点记忆,系统复位,示教盒,暂停,急停,回原点,速度减,区号加,区号减,单步再现,周期再现,连续再现,返回,继续,数据记忆,读取数据,设置串口,打开串口,关闭串口。
Speech Recognition code, the robot voice control system CMDs = zero, one, two, three, four, five, six, 7, 8, 9, implementation, the joint zeroing, the arm was changing, the boom has turned around, now switch Arm, Arm reversal, wrist was changing, wrist inversion, Hand opened, the gripper closure, a rise, drop, the boom operation, the negative operating arm, Arm operation, running negative prosthetic wrist operation negative wrist operation, Operation Hand, Hand negative operation, the aeronautical operations, negative movements operation, the arm zero, zero Arm, wrist zeroing, Hand RZ, RZ movements, speed increases, the basics of memory, system reset, the box said, suspension, quick-stop and back to the original point, speed reduction, plus the area code, area code reduction, single-step r (2007-04-23, Visual C++, 104KB, 下载84次)