Audio signal decoding device and method of balance adjustment
US8737626B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2010 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Jun 30, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an audio signal decoding device and a method of balance adjustment that reduces a fluctuation of a decoded signal orientation and maintains a stereo perception. An interchannel correlation computation unit (224) computes a correlation between a left channel decoded stereo signal and a right channel decoded stereo signal, and if the interchannel correlation is low, a peak detection unit (225) uses a peak component of a decoded monaural signal of the current frame and a peak component of either a left or a right channel of the preceding frame to detect a peak component with a high temporal correlation. The peak detection unit (225) combines and outputs, from among the frequencies of the detected peak components, a peak frequency of a frame n−1 and a peak frequency of a frame n. A peak balance coefficient computation unit (226) computes, from the peak frequency of the frame n−1, a balance parameter that is used in converting a peak frequency component of the monaural signal to stereo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.