20240029747. BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS simplified abstract (Dolby International AB)
Contents
BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
Organization Name
Inventor(s)
Kristofer Kjoerling of Solna (SE)
Lars Villemoes of Järfälla (SE)
Heiko Purnhagen of Sundbyberg (SE)
Per Ekstrand of Saltsjöbaden (SE)
BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240029747 titled 'BACKWARD-COMPATIBLE INTEGRATION OF HIGH FREQUENCY RECONSTRUCTION TECHNIQUES FOR AUDIO SIGNALS
Simplified Explanation
The patent application describes a method for decoding an encoded audio bitstream. Here is a simplified explanation of the abstract:
- The method starts by receiving the encoded audio bitstream.
- The audio data is then decoded to generate a decoded lowband audio signal.
- High frequency reconstruction metadata is extracted from the bitstream.
- The decoded lowband audio signal is filtered using an analysis filterbank to generate a filtered lowband audio signal.
- A flag indicating whether spectral translation or harmonic transposition should be performed on the audio data is extracted.
- A highband portion of the audio signal is regenerated using the filtered lowband audio signal and the high frequency reconstruction metadata, based on the flag.
Potential applications of this technology:
- Audio decoding and playback systems
- Audio compression and transmission systems
- Audio editing and post-production tools
Problems solved by this technology:
- Efficient decoding of encoded audio bitstreams
- Accurate reconstruction of high frequency audio signals
- Flexibility in performing spectral translation or harmonic transposition
Benefits of this technology:
- Improved audio quality and fidelity
- Enhanced control over audio signal processing
- Efficient use of bandwidth and storage space
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.
