Description: PCM通信系统脉冲编码调制的信源编码，可以运行。模拟PCM的编码的波形！-PCM communication system pulse code modulation source coding, can run. Simulation of the PCM waveform coding! Platform: |
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Author:wstc |
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Description: 脉冲编码调制实验过程（PCM）本文详细介绍了PCM编码的实验过程-Pulse code modulation experiment (PCM) This paper introduces in detail the experimental process of PCM coding Platform: |
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Author:gaopengfei |
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Description: ADPCM(Adaptive Differential Pulse Code Modulation)，是一种针对 16bits( 或8bits或者更高) 声音波形数据的一种有损压缩算法,它将声音流中每次采样的 16bit 数据以 4bit 存储,所以压缩比 1:4. 而且压缩/解压缩算法非常简单,所以是一种低空间消耗，高质量高效率声音获得的好途径。保存声音的数据文件后缀名为 .AUD 的大多用ADPCM 压缩。-ADPCM (Adaptive Differential Pulse Code Modulation), is a response to 16bits (or 8 bits or higher) voice waveform data of a lossy compression algorithm, it will sound each stream sampling 16bit data to 4bit storage, so the compression ratio 1:4. and compression/decompression algorithm is very simple, there is a low space consumption, high-quality sound and efficient way to get good. Preservation of the voice data file is named suffix. AUD mostly using ADPCM compression. Platform: |
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Author:王磊 |
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Description: 心电信号的压缩!
通过预测编码和差分脉冲编码调制（DPCM）的方式来减少冗余，实现数据压缩的目的。-ECG compression! Through predictive coding and differential pulse code modulation (DPCM) approach to reduce redundancy and achieve the purpose of data compression. Platform: |
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Author:朱笑愚 |
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Description: DPCM是differential pulse code modulation的缩写，也就是差分脉冲编码调制的意思。他的主要思想是通过已知的数据预测下一个数据，然后传递预测值与实际值之间的差值。-DPCM is a differential pulse code modulation acronym, that is, differential pulse code modulation mean. His main idea is known to the data through a data forecast, and then transfer predictive value and the actual value of the difference between. Platform: |
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Author:huang xue wei |
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Description: 差分脉冲编码调制（DPCM）的matlab模块仿真，实现抽样，量化，预测，编码并解码，欢迎下载使用，我自己编的-Differential pulse code modulation (DPCM) of matlab simulation module, the realization of the sample, quantification, prediction, coding and decoding, welcome to download, I own the Platform: |
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Author:张正锋 |
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Description: PCM编码系统的设计【课程设计】PCM编码（又叫脉冲编码调制）：数字通信的编码方式之一。主要过程是将话音、图像等模拟信号每隔一定时间进行取样，使其离散化，同时将抽样值按分层单位四舍五人取整量化，同时将抽样值按一组二进制码来表示抽样脉冲的幅值。-PCM coding system design curriculum design】 【PCM encoding (also known as pulse code modulation): digital communications, one of the encoding. The main process is to voice, image and other analog signal at a certain time for sampling, to discretization, sampling at the same time, the value of homes by the hierarchical units in five four rounded to quantify the sampling values at the same time, a group of binary code to indicate the sample pulse amplitude. Platform: |
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Author:zhen |
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Description: 脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程：采样、量化与编码。
采样：低通连续信号采样，以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理，绘出信号时、频图形；带通连续信号采样，以x=sin(20*t) m=x./t 为例说明带通采样定理，绘出信号时、频图形。
量化：均匀量化，以幅度 的正弦信号为例实现为64级电平的均匀量化；非均匀量化，输入A律PCM编码器的正弦信号 ，采样序列为 ，将其进行PCM编码，给出编码器的输出码组序列
编码：以上述信号为例，实现A律的13折线近似法及国际标准PCM对数A律量化编码。-Pulse code modulation (PCM) to achieve
PCM technology programming three processes: sampling, quantization and coding.
Sample: low-pass continuous signal sampling to x = sin (200* t) m = x./(200* t) m = m.* m an example low-pass sampling theorem, draw the signal, frequency graphics bandpass sampling continuous signals to x = sin (20* t) m = x./t an example bandpass sampling theorem, draw the signal, frequency graph.
Quantization: uniform quantization, in order to realize the magnitude of sinusoidal signal as an example for the 64 level uniform quantization non-uniform quantization, input A law PCM encoder sine signal, the sampling sequence, to be PCM encoded, the encoder is given The output code sequence
Code: A Case Study of the signal to achieve the 13 A line approximation law and international standards on the number of A law PCM coding quantization. Platform: |
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Author:马芳 |
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Description: 脉冲编码调制（PCM，Pulse Code Modulation）是一种将模拟语音信号转换成数字信号的编码方式，从数学上来看，量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合，编码就是用一组二进制数来表示这些映射后的有限数。
国际标准化的PCM采用折叠二进制码，符合长途电话质量。根据量化方法的不同，PCM 可分为均匀量化PCM 和对数PCM 两大类，对数PCM中，A律和μ律编码都已被定为国际标准。
本程序实现了A律、μ律以及均匀量化三种PCM，并带有GUI界面，方便使用。可以计算编码后的码率、运行时间以及最小均方误差。-Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding, from the mathematical point of view, the process is to quantify the magnitude of the value of an infinite number of continuous mapping into a discrete set of the limited range of values number set, code is a set of binary digits, said after a limited number of these maps.
By folding the International Standardization of PCM binary code, in line with long-distance telephone quality. According to the different quantitative methods, PCM can be divided into uniform quantization PCM PCM and the number of two categories, on the number of PCM, A law and μ-law code have been designated as international standards.
A law implemented in this program, μ law and the uniform quantization of three PCM, with a GUI interface, easy to use. Encoded bit rate can be calculated, running time and minimum mean square error.
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Author:Sariel |
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Description: Pulse code modulation is a form of information conversion from discrete to digital. Pulse code modulation is used in almost all modern communication systems and is essential for digital communication. Each sampled value is given in the form of a discrete signal, converted to its binary equivalent, and coded in the form of zeros and ones. There are different types of pulses used for coding ones and zeros. In the following program the user is asked to select the pulse which will then be used to modulate the incoming digital signal. Platform: |
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Author:Ritesh Das |
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Description: 掌握脉冲编码调制原理；
理解量化级数、量化方法与量化信噪比的关系
-Grasp the pulse code modulation principle
Understanding of quantization levels, and quantitative methods to quantify the relationship between SNR Platform: |
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Author:李君 |
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Description: Pulse code Modulation: The pulse code modulator technique samples the input signal x(t) at a sampling frequency. This sampled variable amplitude pulse is then digitalized by the analog to digital
converter. Figure.(1) shows the PCM generator. Platform: |
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Author:u20140801 |
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