Invention Grant
- Patent Title: Systems, apparatus and methods for dynamic range enhancement of audio signals
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Application No.: US17349638Application Date: 2021-06-16
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Publication No.: US11528002B2Publication Date: 2022-12-13
- Inventor: Morgan Timothy Prior , Pradeep Saminathan , Mehul Mistry
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: GB Edinburgh
- Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee Address: GB Edinburgh
- Agency: Jackson Walker L.L.P.
- Main IPC: H03G3/30
- IPC: H03G3/30 ; G10L25/51 ; H04R3/00

Abstract:
An apparatus for providing an output signal to an audio transducer comprises: one or more signal paths for receiving respective digital audio input signals, applying respective digital gains, and outputting respective amplified digital audio input signals; one or more inputs for receiving one or more volume parameters associated with the digital audio input signals; converter circuitry, coupled to the one or more signal paths, for converting the one or more amplified digital audio input signals into the analogue domain, and outputting an analogue audio input signal; an analogue gain element, for applying an analogue gain to the analogue audio input signal and outputting the output signal; and a control circuit, coupled to the one or more signal paths, operative to select the analogue gain based on a comparison of the volume parameters and the one or more digital audio input signals as multiplied by the volume parameters, and to select the respective digital gains for each digital audio input signal so that an overall gain in the respective signal path corresponds to a volume parameter associated with the respective digital audio input signal.
Public/Granted literature
- US20210313944A1 SYSTEMS, APPARATUS AND METHODS FOR DYNAMIC RANGE ENHANCEMENT OF AUDIO SIGNALS Public/Granted day:2021-10-07
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