Audio-encoding method and apparatus, audio-decoding method and apparatus, recoding medium thereof, and multimedia device employing same
US9361895B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Dec 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/167
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is an audio encoding method. The audio encoding method includes: acquiring envelopes based on a predetermined sub-band for an audio spectrum; quantizing the envelopes based on the predetermined sub-band; and obtaining a difference value between quantized envelopes for adjacent sub-bands and lossless encoding a difference value of a current sub-band by using a difference value of a previous sub-band as a context. Accordingly, the number of bits required to encode envelope information of an audio spectrum may be reduced in a limited bit range, thereby increasing the number of bits required to encode an actual spectral component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.