Audio signal encoding method and device
US9224401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2012 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | May 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/002
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio signal encoding device includes: a window determination unit for determining the type of window of each channel; a correction unit for correcting the number of available bits; and a quantization unit for quantizing the audio signal of each channel sequentially so that the number of bits is equal to or less than the corrected number of available bits while adding the number of bits left unused, and the correction unit includes: a use rate history calculation unit for calculating a bit use rate in quantization of each type of window; and a corrected bit number calculation unit for correcting the number of available bits so that the rate of used bits to the number of available bits of each channel on the assumption that quantization is performed with the calculated bit use rate in quantization approaches the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.