Français
5. Compression formats for multichannel audio bitrate reduction
5.1 Lossless and lossy
Lossless compression algorithms provide objective transparency, i.e. the decompressed signal is bit-for-bit identical to the original. But the compression ratio is 2 on average, and can be as low as 1. These ratios are largely insufficient for broadcast or transmission applications. Only archiving (sound libraries) can be a valid use.
Lossy algorithms aim for subjective transparency (the compressed sequence is perceived as being of identical quality to the original), but can be sensitive to successive compression-decompression (cascading or tandem coding).
SCROLL...
The Ultimate Scientific and Technical Reference
This article is included in
Signal processing and its applications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Compression formats for multichannel audio bitrate reduction
Signal transport and storage in production environments
Bibliography
Standards and norms
- Standard for digital audio engineering – Serial transmission format for two-channel linearly represented digital audio data (Revision of AES3-1992, including subsequent amendments) + AES3-Am5-2008 + AES3-Am.6-2008 - AES3-2003 -
- Recommended Practice for Digital Audio Engineering – Serial Multichannel Audio Digital Interface (MADI) (Revision of AES10-1991) - AES10-2008 -
- Standard for digital audio engineering...
Directories
Manufacturers – Suppliers – Distributors (non-exhaustive list)
APT-X https://www.aptx.com/
Dolby https://www.dolby.com/
...
The Ultimate Scientific and Technical Reference
