MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202548004922 A) filed by Dolby International Ab on January 21, 2025, for Backward-Compatible Integration Of Harmonic Transposer For High Frequency Reconstruction Of Audio Signals.
Inventors include Villemoes, Lars; Purnhagen, Heiko; and Ekstrand, Per.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
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 10 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.
Disclaimer: Curated by HT Syndication.
