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Description: 该程序主要实现图像的无损压缩，具体算法包括：
（1）整数小波变换＋SPIHT无损压缩
其中整数小波可以采用JPEG2000提供的5－3小波，也可以采用S＋P变换，本程序均已给出。
（2）DPCM＋算术编码
DPCM采用的是JPEG中采用的方法；
（3）JPEG－LS标准
JPEG－LS的无损压缩性能非常好，超过JPEG2000。-The program mainly realize lossless image compression, the specific algorithm include: (1) integer wavelet transform SPIHT Integer Wavelet lossless compression which can be used to provide the 5-3 wavelet JPEG2000, can also adopt the S P transform, the procedures are given. (2) DPCM arithmetic coding DPCM is used in JPEG methodology (3) JPEG-LS standard JPEG-LS lossless compression of very good performance, more than JPEG2000.
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Author: yang |
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Description: 差分脉冲编码：通信工程中经常用到的一个实用算法。这里是matlab的实现。-Differential pulse code: Communications Engineering frequently used for a practical algorithm. Here is the realization of matlab.
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Size: 1024 |
Author: tao lan |
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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.
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Size: 24576 |
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.
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Size: 14336 |
Author: huang xue wei |
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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
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Author: 压子 |
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Description: 利用预测的方法实现图像的压缩，可以应用于光谱图像谱间去相关-The use of projected images of the compression method can be applied to spectral-spectral images to the relevant
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Size: 1024 |
Author: 范范 |
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Description: DPCM,由于语音信号的相邻抽样点之间有一定的幅度关联性，所以，可根据以前时刻的样值来预测现时刻的样值，只要传预测值和实际值之差，而不需要每个样值都传输。这种方法就是预测编码。-DPCM, as a result of voice signals between adjacent sampling rate of a certain relevance, we can kind of time based on previous values to predict the kind of value are at all times, as long as the predictive value and the mass difference between the actual value, without the need for each transmission sample values. This method is predictive coding.
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Size: 4096 |
Author: 欧华平 |
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Description: 利用matlab实现dpcm编码,和正交fir滤波器的设计。-Dpcm the realization of the use of matlab code fir filter and orthogonal design.
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Size: 411648 |
Author: 洪依 |
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Description: 对某一高斯信源的DCPM编码和检验，对学习DPCM的原理具有参考作用。在matlab7环境下运行正常-Of a Gaussian source coding and testing of DCPM, DPCM on the principle of learning the role of a reference. Matlab7 environment in normal operation
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Size: 1024 |
Author: chenminhao |
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Description: 数字语音储存回放系统 包括 PCM DPCM DeltaM 算法的调制解调-Digital voice playback system, including storage of PCM DPCM DeltaM modem algorithms
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Size: 12288 |
Author: logicmd |
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Description: This files converts the voice signal to DPCM mode for transmission.
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Size: 1024 |
Author: Rafal |
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Description: 利用51单片机进行语音存储与回放系统的源程序，包涵PCM,DPCM,ACM三种录音方式
按键功能：F1--PCM录音 F2--DPCM录音 F3--ADM录音 F4 --停止 5 -- 放音 0 -- 暂停 4 -- 慢放 6 -- 快放-The use of 51 single-chip voice storage and playback system source code, includes PCM, DPCM, ACM tape recording of the three key functions: F1- PCM recording F2- DPCM recording F3- ADM recording F4- stop 5-- Playback 0- suspension 4- slow motion 6- quick release
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Size: 5120 |
Author: 刘一会 |
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Description: DPCM与PCM比较（simulink），先运行M文件，再运行仿真。-DPCM and PCM comparison (simulink), the first run M files, and then run the simulation.
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Size: 4096 |
Author: |
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Description: Differential Pulse Code Modulation (DPCM) and Discrete Cosine Transform (DCT) coding techniques in MATALB
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Size: 10240 |
Author: Yashil |
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Description: Lossless image compression plays a very important role in image processing. However, it develops very slowly and it is difficult to improve the efficiency of compression, since complete information and high fidelity are demanded. The lossless compression ratio of the conventional methods is around 2:1 and 3:1, which doesn’t satisfy practical compression needs. So, it is necessary to develop more efficient lossless image compression methods.
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Size: 15360 |
Author: rupesh |
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Description: 老师的多媒体课件，演示实例，dct量化，dpcm编码、ezm、huffman编码等-Multimedia teachers, demonstration examples, dct quantization, dpcm coding, ezm, huffman coding
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Size: 12624896 |
Author: luozhihui |
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Description: Communication project image compression dpcm huffman coding
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Size: 53248 |
Author: rami |
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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
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Size: 2048 |
Author: shakeel |
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Description: dpcm编码，是一种传统的编码方法，就是预测性编码。-dpcm is
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Size: 75776 |
Author: zhangxinju |
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Description: compression technique in IWPT+DPCM
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Size: 364544 |
Author: jay |
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