Hybrid encoding of higher frequency and downmixed low frequency content of multichannel audio
US8804971B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 27, 2013 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Sep 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding a multichannel audio input signal, including steps of generating a downmix of low frequency components of a subset of channels of the input signal, waveform coding each channel of the downmix, thereby generating waveform coded, downmixed data, performing parametric encoding on at least some higher frequency components of each channel of the input signal, thereby generating parametrically coded data, and generating an encoded audio signal (e.g., an E-AC-3 encoded signal) indicative of the waveform coded, downmixed data and the parametrically coded data. Other aspects are methods for decoding such an encoded signal, and systems configured to perform any embodiment of the inventive method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.