proposes a method of embedding data into JPEG bitstream by modifying Huffman code
From the construction, Algorithm 1 is associated with the Huffman code
whose average length is the shortest.
If we extend now the words table to contain more than 30 words so the compression rate will be grater but in contrast the Huffman code
will be larger.
Keywords: Source coding, prefix codes, Kraft's inequality, Shannon lower bound, data compression, Huffman code
, Tunstall code, Khodak code, redundancy, distribution modulo 1, Mellin transform, complex asymptotics.
The compression scheme presented in this article is a variant of the word-based Huffman code
[Bentley et al.
Huffman coding requires that one or more sets of Huffman code
tables be specified by the application.
Second, based on Bits, the binary stream of secret message, we pick out a word from StackList whose Huffman code
is the same as the beginning digits of Bits.
The Huffman code
is the most widely-known prefix code and is minimal in that it provides the best compression of any prefix code applied to a fixed dictionary .
In , Huffman coefficient structure was divided into Huffman code
and appended bits.
The thread zero puts the Huffman code
of B in the end of the Huffman code
of A, which constitutes the Huffman code
of AC coefficient.
The CCITT facsimile coding standard  bases a Huffman code
on the frequencies with which black and white runs of different lengths occur in sample documents.
The quantized frequency coefficients are replaced by Huffman codes
, which provides lossless compression and hence it is named as "noiseless".