Source Coding

Quantization, compression, and expansion source coding techniques

Apply source coding techniques to format signals according to representative partitions and specific codebook maps. The various source coding techniques apply quantization, compression, and expansion.

Functions

`arithdeco`	Decode binary code by arithmetic decoding
`arithenco`	Encode sequence of symbols by arithmetic encoding
`compand`	Source coding mu-law or A-law compressor or expander
`dpcmdeco`	Decode using differential pulse code modulation
`dpcmenco`	Encode using differential pulse code modulation
`dpcmopt`	Optimize differential pulse code modulation parameters
`huffmandeco`	Decode binary code by Huffman decoding
`huffmandict`	Generate Huffman code dictionary for source with known probability model
`huffmanenco`	Encode sequence of symbols by Huffman encoding
`lloyds`	Optimize quantization parameters using Lloyd algorithm
`quantiz`	Produce quantization index and quantized output value

Objects

`comm.DifferentialDecoder`	Decode binary signal using differential decoding
`comm.DifferentialEncoder`	Encode binary signal using differential coding

Blocks

A-Law Compressor	Implement A-law compressor for source coding
A-Law Expander	Implement A-law expander for source coding
Differential Decoder	Decode binary signal using differential coding
Differential Encoder	Encode binary signal using differential coding
Mu-Law Compressor	Implement µ-law compressor for source coding
Mu-Law Expander	Implement µ-law expander for source coding
Quantizing Decoder	Decode quantization index according to codebook
Quantizing Encoder	Quantize signal using partition and codebook

Topics

Quantization
Quantize data to improve signal sampling efficiency in communications systems.
Differential Pulse Code Modulation
Use DPCM as a predictive quantization method.
Compand a Signal
Make µ-law or A-law compressor and expander calculations.
Huffman Coding
Compress data so that no codeword is a prefix of any other codeword in the dictionary by using Huffman coding and decoding.
Arithmetic Coding
Compress data from sources with a small alphabet by using arithmetic coding and decoding.