Description: 对一帧YUV为4:2:0的图象进行DCT变化和量化以及进行反变换和反量化，并在dos下显示出一个4*4矩阵的变化和量化过程-Of a YUV to 4:2:0 image and quantify changes to DCT, as well as anti-transform and Inverse Quantization, and under dos shows a 4* 4 matrix of the process of change and to quantify Platform: |
Size: 327680 |
Author:andy |
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Description: 实现jpeg图像解码功能。
代码设计思路：1, Reconstruct the Huffman/RLE stream to a sequence
2, Arrange the sequence to a matrix using the zigzag scanning backwards
3, Multiply the matrix by quantization table
4, Perform inverse DCT
5, Shift the values by +128
6, Transform back to RGB color space
-Realize jpeg image decoding capabilities. Code design: 1, Reconstruct the Huffman/RLE stream to a sequence2, Arrange the sequence to a matrix using the zigzag scanning backwards3, Multiply the matrix by quantization table Platform: |
Size: 186368 |
Author:颜新卉 |
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Description: 产生长度为1000的标准正太分布的随机信号，画出时域波形及频谱；
采用u=255的非均匀PCM编码，每符号为8bit，画输入-输出关系图；
计算信号量化噪声比（SQNR）；
信道误码率为10-3；
解码，并画出u律反变换后的信号时域波形及频谱。
扩展要求：
采用均匀PCM、量化级数可变、信道误码率可变。
- have a standard length of 1000 is too random signal distribution, draw time-domain waveform and frequency spectrum u = 255 using the non-uniform PCM encoding, each symbol for 8bit, drawing input- output relationship diagram calculated quantization noise signal than (SQNR) channel bit error rate of 10-3 decoder, and law to draw u the signal after the inverse transform time-domain waveform and frequency spectrum. Expansion of the requirements: uniform PCM, quantization level variable, a variable channel bit error rate. Platform: |
Size: 2048 |
Author:louzhu |
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Description: 工程名为DctQuant，编程实现了一帧CIF格式4:2:0的YUV图像的H.264的整数变换、量化以及逆量化、逆变换。具体的功能表述如下：
1、首先按“打开YUV”按钮，选择一帧格式为CIF的4:2:0的YUV图像（默认的YUV图像的格式为4:2:0的CIF格式）。选择完成后，可以看到显示的输入图像。
2、输入QP值，QP是0到51之间的整数值，超出范围，会弹出对话框提示。QP默认为28。注意：当改变QP值为0时，即没有量化，则点击转换按钮显示出的PSNR值即为输入图像的PSNR值。
3、点击转换按钮，可以看到经过变换量化和逆量化逆变换过程以后输出的图像以及显示输出图像的PSNR值（保留小数点后6位）和默认4x4块号为0的原始各像素值、整数变换后的值、量化后、逆量化后、逆变换后的值。
4、可以手动改变块号，块号的范围为0-6335，超出范围会弹出对话框提示。然后单击“输入块号”按钮即可显示此块号对应的原始各像素值、整数变换后的值、量化后、逆量化后、逆变换后的值。
-Works entitled DctQuant, programming of a CIF format, 4:2:0 YUV images H.264 integer transform, quantization, and inverse quantization, inverse transform. Expression of specific functions are as follows:
1, first press the "Open YUV" button, select a format for the CIF of the 4:2:0 YUV image (the default YUV image format 4:2:0 CIF format). Selection is complete, you can see displayed in the input image.
2, enter the QP value, QP is an integer between 0-51 values out of range, will pop-up dialog box prompt. QP default is 28. Note: When changing the QP value is 0, that is not quantified, then click the convert button to show the PSNR values of the PSNR values shall be the input image.
3, click the Convert button, you can see through the transformation inverse quantization and inverse quantization output of the image after the transformation process and display the output image PSNR values (retention decimal 6), and the default 4x4 block No. 0 of the original values of each pixel , int Platform: |
Size: 446464 |
Author:王婉君 |
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Description: jpeg图像进行量化和反量化的matlab程序-jpeg images can be quantified and inverse quantization of the matlab program Platform: |
Size: 7168 |
Author:carol |
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Description: 利用vc++实现的 基于MMX汇编指令进行优化的H.264的量化和反量化程序，可以运行和输出结果，所需时间是优化前的十分之一，非常有效。-Using vc++ implementation based on optimized MMX assembler instructions H.264 quantization and inverse quantization process, can run and output the results, the time is one-tenth of pre-optimized, very effective. Platform: |
Size: 335872 |
Author:舒念 |
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Description: JPEG图像压缩标准MATLAB仿真程序。包括DCT变换及其逆变换、量化及反量化等过程。-JPEG image compression standard MATLAB simulation program. Including the DCT transform and its inverse transform, quantization and inverse quantization and other processes. Platform: |
Size: 55296 |
Author:秋田 |
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Description: PAV (H265) 是 音视频 压缩解压 协议，非常不同于H264/MPEG4，ZPAV (H265) 的基本算法 是 小波，多级树集合群，广义小波，数学形态小波，......
ZPAV (H265) 基本算法 ：
1，图象与声音分解与合成 ：小波 ；
2，图象与声音前处理 ：小波子带零交叉降噪，目标纹理处理，语音处理 ；
3，速率控制 ：小波子带熵速率控制 ；
4，量化与反量化 ：小波子带熵量化与反量化 ；
5，低频分量和高频分量的降维 ：小波子带邻域交叉降维 ；
6，运动矢量和量化表的分解与合成 ：广义小波 ；
7，位面编码 ：数学形态小波，多级树集合群，嵌入零树，位面降维 ；
8，位流编码 ：算术编码，熵编码 ；
9，运动估计 ：宏块最优决策，运动矢量预测 ；
A，运动搜索 ：钻石，大钻石，小钻石，方形 ；
B，图象与声音后处理 ：低通滤波，断点重构，宏块平滑 ；
C，误码纠错 ：矢量仿真，帧间仿真 。
-The PAV (H265) is the audio and video compression and decompression protocol, is very different from H264/MPEG4
ZPAV (H265) algorithm is a wavelet, multi-level tree collection group, and generalized wavelets, mathematical morphology, wavelet, ...
ZPAV (H265) algorithm:
1, image and sound decomposition and synthesis: wavelet
2, image and sound processing: wavelet sub-band zero-crossing noise, target texture processing, speech processing
3, the rate control: wavelet subband entropy rate control
4, quantization and inverse quantization: Wavelet subband entropy quantization and inverse quantization
5, the dimensionality reduction of the low frequency component and high frequency components: the wavelet subbands neighborhood cross-dimensionality reduction
6, the decomposition and synthesis of the motion vector and quantization tables: generalized wavelet
7, bit-plane coding: the mathematical form of wavelet multi-level tree collection group, embedded zerotree, bit plane Platform: |
Size: 4826112 |
Author:李阳 |
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Description: 量化离散余弦变换系数的程序实现及其效果的检测。过程中使用了8x8的分块方法。首先计算每块的离散余弦变换（DCT)；然后量化了DCT的系数； 最后进行了反离散余弦变换(iDCT). 程序中还可以设定缩放系数。-Quantify the discrete cosine transform coefficients procedure and its effect detection. The process used in the 8x8 sub-block method. First calculate the block discrete cosine transform (DCT), quantization of the DCT coefficient Finally, the inverse discrete cosine transform (iDCT) program can also set the scaling factor. Platform: |
Size: 1024 |
Author:Adam_Z |
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Search - INVERSE QUANTIZATION