arithdeco - Decode binary code using arithmetic decoding
Syntax
dseq = arithdeco(code,counts,len)
Description
dseq = arithdeco(code,counts,len) decodes
the binary arithmetic code in the vector code to
recover the corresponding sequence of len symbols.
The vector counts represents the source's statistics
by listing the number of times each symbol of the source's alphabet
occurs in a test data set. This function assumes that the data in code was
produced by the arithenco function.
Examples
This example is similar to the example on the arithenco reference page, except that it
uses arithdeco to recover the original sequence.
counts = [99 1]; % A one occurs 99% of the time.
len = 1000;
seq = randsrc(1,len,[1 2; .99 .01]); % Random sequence
code = arithenco(seq,counts);
dseq = arithdeco(code,counts,length(seq)); % Decode.
isequal(seq,dseq) % Check that dseq matches the original seq.
The output is
ans =
1
Algorithm
This function uses the algorithm described in [1].
See Also
arithenco, Arithmetic Coding
References
[1] Sayood, Khalid, Introduction
to Data Compression, San Francisco, Morgan Kaufmann, 2000.
 | ammod | | arithenco |  |
How much time do you spend on testing to ensure implementation meets system-level requirements?
Learn more
Store 
