MUMBAI, India, Aug. 31 -- Intellectual Property India has published a patent application (202648099801 A) filed by Dolby International Ab on August 18, 2026, for Backward-Compatible Integration Of High Frequency Reconstruction Techniques For Audio Signals.
Inventors include Kjoerling, Kristofer; Villemoes, Lars Pctus No; Purnhagen, Heiko; and Ekstrand, Per.
The application for the patent was published on August 28, 2026, under issue no. 35/2026.
Abstract: ABSTRACT BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the 5 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 10 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. 58
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