The quantized frequency coefficients are replaced by Huffman codes
, which provides lossless compression and hence it is named as "noiseless".
Canonical Huffman codes
are used to ease the encoding and decoding.
Three variations of Huffman table alignment were considered: single frequency and Huffman codes
table for all axes, two tables (for main and transverse axes), and a table for each axis.
Key words and phrases : Sampling, Sparsity, Compressed Sampling, Huffman codes
We now turn our attention to fixed-to-variable length codes, in particular Shannon and Huffman codes
He describes in detail cryptographic protocols, key management, message authentication, applications such as email and Internet security, new wrinkles in noncryptographic security issues such as hacking and cybercrime, and closes with very useful descriptions of information theory and coding including Huffman codes
We now define the different types of Huffman codes
used in this work, all of which adhere to the above points.
VLCs and VLIs both are codes with variable lengths, but VLIs are not Huffman codes
The second level is intra block parallelism; it utilizes the fact that both run-length encoding (RLE), which compresses long sequences of zeros after quantization of APBT-transformed data, and lookup of Huffman codes
can be done in parallel.
Tight upper bounds on the redundancy of Huffman codes
An offsetting advantage of Huffman codes
is that they are more robust.
We present a Pascal implementation of the one-pass algorithm for constructing dynamic Huffman codes
that is described and analyzed in a companion paper .