SKantar/CompresionAlgorithms

A-law and DPCM (using Huffman)

Compresion-Algorithms

Comparision of standard companding algorithms

1. A-law (https://en.wikipedia.org/wiki/A-law_algorithm)
2. Adaptive DPCM using Huffman (https://en.wikipedia.org/wiki/Adaptive_differential_pulse-code_modulation)

Tools

• Programming Language C (https://en.wikipedia.org/wiki/C_(programming_language))
• Code::Blocks IDE (http://www.codeblocks.org/)

Steps

• Recorder 20 wav files (https://en.wikipedia.org/wiki/WAV)
• Compression of each file ( with both algorithms, new files stored with algo extensions)
• Decompression of each compressed file

Measurements

A-Law

DPCM

Results

Conclusion

DPCM algorithm has better quality of sound after decompressing.