Traditional lossless compression methods (Huffman, LZW, etc.) are usually poorly applied to compressing audio information (for the same reasons as when compressing visual information).
Some lossy compression methods are listed below:
Compression of silence (pauses) – defines periods of “silence”, works similarly to run-length coding.
ADPCM – Adaptive Differential Pulse Code Modulation (the term Adaptive Delta Pulse Code Modulation (ADPCM) is used in Russian literature. For example, the CCITT G.721 standard is from 16 to 32 Kbits / sec:
Encoding the difference between two or more consecutive samples; then the difference is quantized -> when quantizing, part of the information is lost. The quantization is adaptive (changes the parameters depending Continue reading