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: |
Size: 21504 |
Author:wstc |
Hits:
Description: 通过PCM调制实现信源编码,通过抽样,调制通过MATLAB软件实现-Through the realization of PCM modulation source coding, through sampling, modulation through the MATLAB software Platform: |
Size: 1024 |
Author:dxq |
Hits:
Description: 脉冲编码调制（PCM）用于在数字传输媒体上传送模拟信号，在PCM中，首先对模拟信号以高于其带宽两倍的奈奎斯特率进行采样，然后对所得样本进行量化。采用不同量化级别生成的PCM编码会影响接收器重建模拟信号的质量。 -Pulse code modulation (PCM) for the media in the digital transmission of analog signal transmission in the PCM, the first analog signal to more than the Nyquist rate of twice the bandwidth sample, and then to quantify the samples. Using different quantization level generated PCM coding receiver will affect the quality of the reconstruction of analog signals. Platform: |
Size: 1024 |
Author:jack |
Hits:
Description: 摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
-Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete Platform: |
Size: 523264 |
Author:压子 |
Hits:
Description: matlab程序，可实现脉冲编码调制，模拟信号的数字传输：抽样、量化、编码-matlab program to achieve pulse code modulation, digital transmission of analog signals: sampling, quantization, coding Platform: |
Size: 3072 |
Author:xjq |
Hits:
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: |
Size: 2048 |
Author:马芳 |
Hits:
Description: THIS R THE PROGRAM FOR PULSE CODE MODULATION AND DPCM WHICH R HAVING THE RESULTS FOR WHICH A INPUT SEQUENCE IS TAKEN AND A CARRIER CODE IS ADDED TO THE MESSAGE SEQU TO GET THIS MODULTION DONE Platform: |
Size: 2048 |
Author:shakeel |
Hits:
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. Platform: |
Size: 954368 |
Author:tanii |
Hits:
Description: this the matlab code for pcm "pulse code modulation"-this is the matlab code for pcm "pulse code modulation" Platform: |
Size: 3072 |
Author:book123 |
Hits:
Description: 发射信号为13位巴克码和线性调频混合调制的信号,该雷达具有数字化正交解调、数字脉冲处理、固定目标对消、动目标检测, 和恒虚警（CFAR）处理等功能
-Transmitted signal is 13 Barker code modulation and linear FM signals mixed, the radar has a digital quadrature demodulation, digital pulse processing, fixed target for elimination, moving target detection, and constant false alarm rate (CFAR) processing functions Platform: |
Size: 3072 |
Author:liuchao |
Hits:
Description: 解耦，恢复原信号，关于小波的matlab复合分析，代码里有很完整的注释和解释，相参脉冲串复调制信号，对于初学者具有参考意义。- Decoupling, restore the original signal, Matlab wavelet analysis on complex, Code, there are very complete notes and explanations Complex modulation coherent pulse train signal, For beginners with a reference value. Platform: |
Size: 7168 |
Author:yfcaktxxs |
Hits:
Description: 连续相位调制信号(CPM)产生，一个很有用的程序，IMC-PID是利用内模控制原理来对PID参数进行计算，课程设计时编写的matlab程序代码，含噪脉冲信号进行相关检测,matlab程序运行时导入数据文件作为输入参数，基于互功率谱的时延估计。-Continuous phase modulation signal (CPM) to produce, A very useful program, The IMC- PID is using the internal model control principle for PID parameters is calculated, Course designed to prepare the matlab program code, Noisy pulse correlation detection signal, Import data files as input parameters matlab program is running, Based on the time delay estimation of power spectrum. Platform: |
Size: 7168 |
Author:dckifzu |
Hits:
Description: 包括主成分分析、因子分析、贝叶斯分析，通过matlab代码，合成孔径雷达（SAR)目标成像仿真，相参脉冲串复调制信号，采用偏最小二乘法，预报误差法参数辨识-松弛的思想，时间序列数据分析中的梅林变换工具。- Including principal component analysis, factor analysis, Bayesian analysis, By matlab code, Synthetic Aperture Radar (SAR) imaging simulation target, Complex modulation coherent pulse train signal, Partial least squares method, Prediction Error Method for Parameter Identification- the idea of relaxation, Time series data analysis Mellin transform tool. Platform: |
Size: 7168 |
Author:ryfwpq |
Hits:
Description: 推导雷达方程，建模计算美国的预警机雷达对大型战斗机的最大发现距离。雷达建模包括天线方向图、扫描调制（天线方向图的扫描调制）等，同时考虑不同脉冲积累数(Derive the radar equations, model and calculate the maximum discovery distance of the US early warning aircraft radar for large fighters. Radar modeling includes antenna pattern, scanning modulation (scanning modulation of antenna pattern), etc., while considering different pulse accumulation numbers) Platform: |
Size: 661504 |
Author:星野inori |
Hits:
Search - MATLAB CODE FOR PULSE CODE MODULATION