Adaptive variable bit rate audio compression encoding
US7313520B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2006 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | May 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An adaptive variable bit rate audio encoder and method that examines audio level information and detects various information in the audio data in a psychoacoustic model to create a quantization value and assign a mode tag to a single frame of audio. A bit rate is assigned according to one of three modes, a self-adaptive mode which is free-running and takes direction only from the characteristics of the incoming audio signal, a managed mode which is controlled by rules set from a statistical multiplexer, and a combination of self-adaptive and managed in which control rules from the statistical multiplexer act to maintain limits on the self-adaptive mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.