Rate loop processor for perceptual encoder/decoder
US5627938A · kind A · utility
147Cited by
10References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1994 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/665
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing at a given frequency and the absolute threshold of hearing at the same frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.