Backward-compatible integration of harmonic transposer for high frequency reconstruction of audio signals
US10818306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2018 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Mar 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.