• Patent Title: Deferred Loudness Adjustment For Dynamic Range Control
  • Application No.: US18403432
    Application Date: 2024-01-03
  • Publication No.: US20240143271A1
    Publication Date: 2024-05-02
  • Inventor: Frank Baumgarte
  • Applicant: Apple Inc.
  • Applicant Address: US CA Cupertino
  • Assignee: Apple Inc.
  • Current Assignee: Apple Inc.
  • Current Assignee Address: US CA Cupertino
  • Main IPC: G06F3/16
  • IPC: G06F3/16 H04R3/04
Deferred Loudness Adjustment For Dynamic Range Control
Abstract:
A bitstream is obtained by a decoder side, that contains an encoded version of an audio signal and an instantaneous loudness sequence of the audio signal. The instantaneous loudness sequence has not been loudness normalized. A dynamic range control, DRC, gain sequence is produced by applying the instantaneous loudness sequence to a DRC characteristic, with loudness normalization. The DRC gain sequence is applied to the decoded audio signal. Other aspects are also described and claimed.
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