Backward-compatible integration of high frequency reconstruction techniques for audio signals
US11289106B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2019 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Jan 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/6011
- 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.