Bit allocation method for improved audio quality perception using psychoacoustic parameters
US5761636A · kind A · utility
19Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1997 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Feb 12, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/665
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Audio quality perception can be improved in an audio compression system 100 by defining a frequency subband threshold 205. With the frequency subband threshold 205, each frequency subband favorable to the threshold will be allocated at least a predetermined number of bits while frequency subbands unfavorable to the threshold will receive no bit allocations. This determination is made on an audio frame by audio frame basis, or upon change of the audio compression ratio, since changing any of the parameters: bitrate, sampling rate and coding mode changes the compression ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.