MUMBAI, India, Oct. 11 -- Intellectual Property India has published a patent application (202518090566 A) filed by Dolby International AB, Amsterdam, on Sept. 22, for 'method and device for applying dynamic range compression to a higher order ambisonics signal.'

Inventor(s) include Boehm, Johannes; and Keiler, Florian.

The application for the patent was published on Oct. 10, under issue no. 41/2025.

According to the abstract released by the Intellectual Property India: "Dynamic Range Control (DRC) cannot be simply applied to Higher Order Ambisonics (HOA) based signals. A method for performing DRC on a HOA signal comprises transforming the HOA signal to the spatial domain, 5 analyzing the transformed HOA signal, and obtaining, from results of said analyzing, gain factors that are usable for dynamic compression. The gain factors can be transmitted together with the HOA signal. When applying the DRC, the HOA signal is transformed to the spatial domain, the gain factors are extracted and multiplied with the transformed HOA signal in the spatial 10 domain, wherein a gain compensated transformed HOA signal is obtained. The gain compensated transformed HOA signal is transformed back into the HOA domain, wherein a gain compensated HOA signal is obtained."

The patent application was internationally filed on Mar. 24, 2015, under International application No.PCT/EP2015/056206.

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