Invention Grant
- Patent Title: Backward-compatible integration of high frequency reconstruction techniques for audio signals
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Application No.: US17677608Application Date: 2022-02-22
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Publication No.: US11756559B2Publication Date: 2023-09-12
- Inventor: Kristofer Kjoerling , Lars Villemoes , Heiko Purnhagen , Per Ekstrand
- Applicant: DOLBY INTERNATIONAL AB
- Applicant Address: NL Amsterdam Zuidoost
- Assignee: DOLBY INTERNATIONAL AB
- Current Assignee: DOLBY INTERNATIONAL AB
- Current Assignee Address: IE Dublin
- Main IPC: G10L19/02
- IPC: G10L19/02 ; G10L19/16 ; G10L19/26 ; H03M7/30
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.
Public/Granted literature
- US20220180880A1 BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS Public/Granted day:2022-06-09
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