PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION

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PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION - A simplified explanation of the abstract

This abstract first appeared for US patent application 18653833 titled 'PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION

The application pertains to High Frequency Reconstruction/Regeneration (HFR) of audio signals, specifically focusing on a method and system for performing HFR of audio signals with significant energy level variations across the low frequency range to reconstruct the high frequencies of the audio signal.

System generates high frequency subband signals from low frequency subband signals and spectral gain coefficients.
System adjusts energy of high frequency subband signals using target energies covering different intervals within the high frequency range.
Target energies indicate desired energy levels of high frequency subband signals within specific intervals.

Potential Applications: - Audio signal processing in music production - Enhancing sound quality in audio systems - Noise reduction in communication devices

Problems Solved: - Addressing energy level variations in audio signals - Improving high frequency reconstruction accuracy - Enhancing overall audio signal quality

Benefits: - Enhanced audio signal clarity - Improved high frequency reproduction - Reduction of distortion in audio playback

Commercial Applications: Title: Advanced Audio Signal Processing System for High Frequency Reconstruction This technology can be utilized in: - Professional audio equipment - Consumer electronics - Telecommunication devices

Prior Art: Readers can explore prior art related to audio signal processing, high frequency reconstruction, and spectral gain coefficients in the field of audio engineering and signal processing.

Frequently Updated Research: Stay updated on advancements in audio signal processing, high frequency reconstruction techniques, and energy level optimization in audio systems.

Questions about High Frequency Reconstruction: 1. How does this technology improve audio signal quality compared to traditional methods? - This technology enhances audio signal quality by accurately reconstructing high frequencies based on target energy levels within specific intervals. 2. What are the potential challenges in implementing this system in real-time audio processing applications? - Real-time implementation may require efficient algorithms and processing power to adjust energy levels of high frequency subband signals effectively.

Original Abstract Submitted

The application relates to HFR (High Frequency Reconstruction/Regeneration) of audio signals. In particular, the application relates to a method and system for performing HFR of audio signals having large variations in energy level across the low frequency range which is used to reconstruct the high frequencies of the audio signal. A system configured to generate a plurality of high frequency subband signals covering a high frequency interval from a plurality of low frequency subband signals is described. The system comprises means for receiving the plurality of low frequency subband signals; means for receiving a set of target energies, each target energy covering a different target interval within the high frequency interval and being indicative of the desired energy of one or more high frequency subband signals lying within the target interval; means for generating the plurality of high frequency subband signals from the plurality of low frequency subband signals and from a plurality of spectral gain coefficients associated with the plurality of low frequency subband signals, respectively; and means for adjusting the energy of the plurality of high frequency subband signals using the set of target energies.