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数字音频格式有很多种，其质量与采样频率和采样精度两个参数有关。频率的表示单位为赫兹〔Hz〕，它表示每秒采样次数。采样频率越高，音质就越好。采样精度为每次采样所存储的数据数量，它决定每个数字信号所能够表示的离散振幅的数量。存储每个样本的数据越多，音质就越好。但是高品质的声音需要占用大量的内存和磁盘空间。考虑到网络带宽，在Internet连接上传输就需要花费很长的时间。对于Applet来说，保证声音文件的最小化是极为重要的。-digital audio format there are many,
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to show the waveform of audio file and play it on computer
Purpose: Familiar with WAV file format and UI design
It should have the following functions:
Provide a Graphic User Interface for user to browse the file system and select one WAV file
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to show the waveform of audio file and play it on computer
Purpose: Familiar with WAV file format and UI design
It should have the following functions:
Provide a Graphic User Interface for user to browse the file system and select one WAV file
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Routine mampres: To obtain amplitude response from h(exp(jw)).
input parameters:
h :n dimensioned complex array. the frequency response is stored
in h(0) to h(n-1).
n :the dimension of h and amp.
fs :sampling frequency (Hz).
iamp:If
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用DSP实现的一个简单的语音识别系统,只要实现单个词的识别即可,采样率8k,帧长30ms,帧移10ms,系统采样后分帧--端点检测,将检测到的原始语音信号保存下来,基本上一个字在30帧左右,然后提取每帧的LPC参数--将LPC参数转换为LPC倒谱系数,然后利用DTW方法和模板比较.-a brief speech recognition system, as long as the realization of a single word can be identified. 8 k sampli
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基于自适应在线遗传算法整定的PID控制,每个采样时间分别对PD参数进行整定-based on adaptive online genetic algorithm tuning PID control, sampling each time the PD parameters tuning
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信号与系统基础知识包括连续信号与模型、离散信号与模型；常用信号变换包括Z变换、Chirp Z变换、FFT变换、DCT变换和Hilbert变换等；离散系统结构包括IIR、FIR和Lattice结构；IIR滤波器设计包括模拟和数字低通、高通、带通与带阻滤波器设计，以及基于冲激响应不变法和双线性Z变换法的IlR滤波器设计等；FIR滤波器设计包括基于窗函数、频率抽样法和切比雪大逼近法的FIR滤波器设计；平稳信号分析包括经典功率谱估计、基于参数模型的功率谱估计和基于非参数模型的功率谱估计；非平稳信号分析包
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一个使用数学方法生成波形声音文件的源代码,可以载入预置数学公式,保存8位和16位单声道声音文件,可以设置振幅、频率、持续、采样等参数,可以调整波形斜面,回声。很好用的-use of a mathematical method to generate waveform audio files of source code, can be included in the preset mathematical formula, and the preservation of eight 16 mon
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利用最佳一致逼近设计数字滤波器的程序，根据提示输入参数，程序输出单位取样响应h[n]-use the best approximation of the digital filter design process, according to suggest input parameters, output units sampling procedures response h [n]
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声卡采集的程序,可设置采样频率,位长,采样时间等参数.可采样8k-44.1kHz的信号,进行频谱分析.-sound card collection procedures, sampling frequency can be set up, elderly, Sampling time parameters. 8 k can be sampled - 44.1kHz signal spectrum analysis.
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The package includes 3 Matlab-interfaces to the c-code:
1. inference.m
An interface to the full inference package, includes several methods for
approximate inference: Loopy Belief Propagation, Generalized Belief
Propagation, Mean-Field
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fft111算法实现通过对相应参数的人机界面对话输入绘制出相应的采样图及频谱图-fft111 algorithm corresponding parameters of the man-machine interface dialogue draw the corresponding input sampling plan and the spectrum
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WLAN仿真－发送机
wlan No Comments
设置完系统参数后，开始产生发送数据。
1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。
2. QAM映射
3. 将数据映射到不同载波，形成OFDM符号
4. 产生pilot，并将pilot插入OFDM符号中
5. 加入dc和guard子载波
6. 进行ifft，将频域信号变到时域，并加入循环前缀
7. 对信号进行overlap window
8. 在时域产生short preamb
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被控对象为一个三环结构的伺服系统。伺服系统参数和控制参数在程序中给出描述。系统采样时间为1ms.根据是否加入摩擦干扰和前馈补偿分别进行仿真。-Charged for a three-ring structure of the servo system. Servo system parameters and control parameters described in the procedure are given. System sampling time of 1ms. In accord
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基于宽带调制转换器的一种新的压缩感知技术-Matlab package that simulates sampling by the analog system. The MWC consists of an RF front-end whose intermediate nodes are non-bandlimited signals. In this setting, computing the samples that would have been obtained by the ha
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声卡采集 动态显示时域波形及频率 可以设置采样参数-Dynamic display of the sound card capture time domain waveforms and frequency of sampling parameters can be set
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在c++builder 2010环境下，采用VFW技术所设计的视频参数设置、采集、录像等功能。-An Example of parameters configuration,video steam sampling，video file(.avi) recoding and saving uponing platform of c++builder 2010.
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选择输入信号的参数，以及抽样因子，以及采样参数，对信号分别进行上抽样和下抽样，方便非均匀采样的进行。-Select the input signal parameters, and sampling factors, as well as sampling parameters, respectively, on the signal sampling and down sampling, to facilitate the conduct of non-uniform sampling.
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对一段8k采样率的语音信号加160长度的汉明窗，计算它的10阶LPC系数-calculate 10-order LPC parameters for a speech signal with 8k sampling rate with a 160 points window
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sampling parameters confiruration
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