DOLBY INTERNATIONAL AB (20250118312). BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
Organization Name
Inventor(s)
Kristofer Kjoerling of Solna SE
Heiko Purnhagen of Sundbyberg SE
Per Ekstrand of Saltsjöbaden SE
BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
This abstract first appeared for US patent application 20250118312 titled 'BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
Original Abstract Submitted
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.
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