Invention Grant
- Patent Title: Dynamic range compression with reduced artifacts
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Application No.: US17642211Application Date: 2020-09-10
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Publication No.: US12126973B2Publication Date: 2024-10-22
- Inventor: Mark David De Burgh , Ning Wang
- Applicant: DOLBY LABORATORIES LICENSING CORPORATION
- Applicant Address: US CA San Francisco
- Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee: Dolby Laboratories Licensing Corporation
- Current Assignee Address: US CA San Francisco
- Priority: EP 197154 2019.09.13
- International Application: PCT/US2020/050061 2020.09.10
- International Announcement: WO2021/050639A 2021.03.18
- Date entered country: 2022-03-10
- Main IPC: H04R3/04
- IPC: H04R3/04

Abstract:
Methods for performing dynamic range compression (DRC) on audio in a manner intended to produce output audio for playback by systems or devices with limited power handling capabilities and preferably also to reduce or prevent undesirable artifacts (e.g., pumping and/or breathing) in the output audio. Some embodiments perform the DRC so as to maximize average loudness (while preventing loss of quieter elements) during playback, and also to reduce or prevent distortion. Other aspects are systems or devices configured to perform embodiments of the method. In some embodiments, reduced DRC is applied when average loudness of the input audio approaches (or matches or exceeds) a target (e.g., a knee point for DRC, or a signal level near to a maximum playback level of the intended playback system), since such input audio is assumed to have already been compressed, and otherwise applying full DRC to the input audio.
Public/Granted literature
- US20220322004A1 DYNAMIC RANGE COMPRESSION WITH REDUCED ARTIFACTS Public/Granted day:2022-10-06
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