Signal processing device, control method for signal processing device, control program, and computer-readable storage medium having the control program recorded therein
US8655101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2010 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Jun 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal processing device first decomposes an input signal into a plurality of frequency components in different frequency ranges, then causes a higher harmonic wave generating section to generate a higher harmonic for each of a part or all of frequency components obtained by removing a frequency component in the lowest frequency range from frequency components obtained by the decomposition, and finally composes (i) the higher harmonic thus generated and (ii) a frequency component for which no higher harmonic has been generated. The higher harmonic wave generating section adds the frequency component and a nonlinear process signal (i) in which positive and negative signs of a frequency component for which the higher harmonic is to be generated are retained and (ii) which broadly monotonically increases nonlinearly with respect to the frequency component when the frequency component is located at least in the vicinity of zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.