Backward-compatible integration of high frequency reconstruction techniques for audio signals

EP4550314B1Active Publication Date: 2026-03-18DOLBY INTERNATIONAL AB
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-01-28
Publication Date
2026-03-18

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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.
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Citation Information

Patent Citations

  • Backward-compatible integration of high frequency reconstruction techniques for audio signals

    EP4303871C0

  • Decoding audio bitstreams with enhanced spectral band replication metadata in at least one fill element

    WO2016149015A1