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Description: 利用VHDL语言和模块化设计实现PCM编译码的功能，整体工程和代码全有。-PCM encode and decode by VHDL in Quartus2.
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Size: 835584 |
Author: nancy |
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Description: PCM modulation C source code
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Size: 3072 |
Author: asd |
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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.
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Size: 2048 |
Author: 马芳 |
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Description: PCM相关说明，包括基本工作原理，量化过程和编码原理等。-PCM instructions, including the basic working principle, quantization and coding process rationale.
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Size: 122880 |
Author: 龚敏 |
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Description: 实现PCM编码和解码，这是完成数据填充到WAV文件中的重要的一步-PCM encoding and decoding to achieve, which is the completion of data into WAV file, an important step
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Size: 258048 |
Author: caosheng |
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Description: 讲述数据通信PCM码原理 很适合初学者 很好的 你一定要看-About the principles of data communication is very suitable for PCM code you have to look very good for beginners
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Size: 947200 |
Author: qzl001 |
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Description: 采用PCM方式对语音信号进行编码和解码，文件包含编码解码函数和量化误差计算函数-PCM voice signal by means of encoding and decoding, encoding and decoding functions and the file contains quantization error calculation functions
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Size: 18432 |
Author: 苏鑫 |
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Description: 研华PCM-9361嵌入式工控开发板说明书-The PCM-9361 is a 3.5" SBC (Single Board Computer) with Embedded Intel® Atom
N270 1.6 GHz Processor. PCM-9361 can support DDR2 memory up to 2GB, has five
USB 2.0 compatible ports, Giga LAN (1000 Mbps) interface, LVDS/TTL interface, HD
(High Definition) Audio, and one PCI-104 expansion connector. The PCM-9361 also
supports two SATA and two COM ports.
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Size: 1670144 |
Author: CHEN |
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Description: 实现PCM语音数据流压缩，通过该压缩算法可以实现a/u law-PCM voice data stream to achieve compression, the compression algorithm can be achieved by a/u law
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Size: 2048 |
Author: 王斌 |
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Description: 利用Matlab仿真脉冲编码调制（PCM）及A律、μ律PCM对声音进行压缩编解码过程。
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。波形编码器的作用是对采样后的信号样本进行量化和编码。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，2Aμ律和律编码都已被定为国际标准。-Matlab simulation using pulse code modulation (PCM) and the A law, μ law PCM codec for voice compression process.
Pulse Code Modulation (PCM, Pulse Code Modulation) is an analog voice signal into digital signal encoding. The role of the encoder waveform is sampled signal sample quantization and coding. From the mathematical point of view, the process is to quantify the magnitude of the value of a continuous set of infinite number of maps into a finite number of discrete set of amplitude values , encoding is to use 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 in, 2Aμ law and legal codes have been designated as international standards.
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Size: 954368 |
Author: tanii |
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Description: 码率为1000kb/s，字长为8 位、帧长为128 个字、帧同步码为 EB90EB90H 的PCM 采编器-Rate is 1000kb/s, 8-bit word length, frame length is 128 words, frame synchronization of PCM code EB90H editorial control
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Size: 2531328 |
Author: qifo |
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Description: systemview软件对PCM时分复用进行系统仿真-systemview software for system simulation of PCM time-division multiplexing
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Size: 10240 |
Author: |
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Description: simulink 实现 pcm编码 很有用 希望大家有利-similink pcm cod
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Size: 7168 |
Author: 刘杰 |
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Description: 正弦信号的pcm编码、译码matlab仿真-Sinusoidal signal pcm encoding, decoding matlab simulation
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Size: 11264 |
Author: 进步龙 |
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Description: 一。产生长度为500的零均值，单位方差的高斯随机变量序列，用均匀pcm的方法用16电平进行量化：1）求所得的SQNR，该序列的前5个值，相应的量化值和相应的码字。2）画出量化误差（定义为输入值和量化值之间的差），同时 画出量化值作为输入值的函数的图。3）用128量化电平数重做2）题， 比较结果。
二。产生一个长度为500，按N(O,1)分布的随机变量序列，分别用16，128量化电平数和u=255的u律非线性进行量化，画出每种情况下量化器的误差和输入-输出关系，并求SQNR.
三。长度为500的非平稳序列a由两部分组成：前20个样本是按照均值为零和方差为400的高斯随机变量产生的，其余480个样本是根据均值和方差为1的高斯随机变量产生的，对这个序列分别用均匀pcm和非均匀pcm方法进行128电平量化，试比较两种情况下所得到的SQNR。
-One. Have a length of 500 zero mean, unit variance Gaussian random variables with uniform pcm way to quantify the level with a 16: 1) Find the income SQNR, the sequence of the first 5 values, the corresponding quantization value and the corresponding codeword. 2) Draw the quantization error (defined as the input value and quantify the difference between the values), and draw quantitative values as a function of input graph. 3) redo 128 the number of quantization level 2) title, compare the results.
II. Produce a length of 500, according to N (O, 1) distributed random variables, respectively 16,128 and the number of quantization level of u u = 255 to quantify non-linear law, draw each case quantizer error and input- output relationships, and seek SQNR.
III. Length of the non-stationary series is a 500 consists of two parts: the first 20 samples in accordance with zero mean and variance of 400 generated Gaussian random variable, and the remaining 480 samples are based o
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Size: 4096 |
Author: sun |
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Description: PCM信号的码同步提取；短脉冲滤除；VHDL语言-PCM code synchronization signal extraction short pulse filter VHDL language
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Size: 515072 |
Author: Troy |
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Description: 通过PCM脉冲编码调制、恢复、量化、译码等过程实现A律十三线折线近似的仿真-Through the PCM pulse code modulation, recovery, quantification, A-law decoding process to achieve such a line similar to the simulation of thirteen lines
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Size: 2048 |
Author: 拈龙刺穹 |
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Description: 运用matlab仿真分析了PCM信源编码+FSK调制过程-Matlab simulation analysis of the use of PCM source coding+ FSK modulation process
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Size: 126976 |
Author: 焦惠芳 |
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Description: 收集一些关于PCM音频的资料，希望能对大家有所帮助。网络上对pcm音频进行处理的资料比较少，这些对我有些帮助。-Collect information about PCM audio, hoping to help. Pcm audio on the network to process the data is relatively small, they told me some help.
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Size: 464896 |
Author: 孙先声 |
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Description: 运用SystemView搭建通信系统，实现ＰＣＭ编译码，并采用２PSK调制解调(Using SystemView to build communication system, to achieve PCM encoding and decoding, and the use of 2PSK modulation and demodulation)
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Size: 3072 |
Author: 六耳MK
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