Method and apparatus for encoding voice signals divided into a plurality of frequency bands
US5115240A · kind A · utility
96Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Sep 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/665
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This invention relates to a digital signal encoding apparatus in which the width of the range in selected to be wider for the higher frequency range of the digital signals divided into a plurality of regions and in which the encoded signals are synthesized for the respective ranges, wherein encoding is controlled as a function of the output detecting the characteristics of the components of the divided frequency ranges and the detection time interval is selected to be longer for the lower frequency to enable more efficient encoding to be performed as a function of the properties of input digital signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.