Description: 和其它熵编码方法不同的地方在于，其他的熵编码方法通常是把输入的消息分割为符号，然后对每个符号进行编码，而算术编码是直接把整个输入的消息编码为一个数-And other entropy coding method is that different places, other entropy coding method is to input the message is usually divided into symbols, and then encode each symbol, while the arithmetic coding is directly encode the entire input message to a number of Platform: |
Size: 1024 |
Author:孙伟 |
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Description: 算术码和LZ碼的编码和解码，有MATLAB和C++两种程序，很好用。-Arithmetic code and the LZ code encoding and decoding, there are two MATLAB and C++ program, easy to use. Platform: |
Size: 1028096 |
Author:xuhaixia |
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Description: 通过MATLAB的程序解决相应图上处理中熵值和概率的问题-Adaptive Arithmetic coding. A source generates symbols from alphabet {A, B, C, D}.
Probabilities of occurrence of the symbols are initially estimated as: Pr(A)=Pr(B)=0.25,
Pr(C)= 0.2, and Pr(D)=0.3. After 100 generated symbols, the statistics changes to Pr(A)=
0.1, Pr(B)=0.3, Pr(C)= 0.4, and Pr(D)=0.2. After 300 symbols, statistics is: Pr(A)=0.6,
Pr(B)=0.05 Pr(C)=0.1, and Pr(D)=0.25.
Randomly generate a source sequence of length 500 symbols drawing the
symbols from the true source distributions. That is, for the first 100 symbols, next
300 symbols, and last 100 symbols use the three distributions above,
respectively. Encode this sequence using adaptive arithmetic coding that
adaptively changes frequency of the source symbol occurrence every 100
symbols. Decode the sequence and compare the decoded and original sequences.
Find the efficiency of the code.
Platform: |
Size: 7168 |
Author:李渊 |
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