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Patent Searching and Data


Title:
METADATA FOR LOUDNESS AND DYNAMIC RANGE CONTROL
Document Type and Number:
WIPO Patent Application WO/2014/160849
Kind Code:
A3
Abstract:
An audio normalization gain value is applied to an audio signal to produce a normalized signal. The normalized signal is processed to compute dynamic range control (DRC) gain values in accordance with a selected one of several pre-defined DRC characteristics. The audio signal is encoded, and the DRC gain values are provided as metadata associated with the encoded audio signal. Several other embodiments are also described and claimed.

Inventors:
BAUMGARTE FRANK (US)
ALLAMANCHE ERIC A (US)
STROMMER STEFAN K O (US)
Application Number:
US2014/031992
Publication Date:
November 27, 2014
Filing Date:
March 27, 2014
Export Citation:
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Assignee:
APPLE INC (US)
International Classes:
G10L19/008; G10L21/0316; H03G7/00
Foreign References:
US20110038490A12011-02-17
Other References:
"A Guide to Dolby Metadata", 1 January 2005 (2005-01-01), pages 1 - 28, XP055102178, Retrieved from the Internet [retrieved on 20140214]
"Specification of the Broadcast Wave Format; a format for audio data files - Supplement 6 : Dolby Metadata chunk - EBU - TECH 3285 suppl.6", 1 October 2009 (2009-10-01), XP055105526, Retrieved from the Internet [retrieved on 20140305]
"Recommendation ITU-R BS.1770-1 Algorithm to measure audio programme loudness and true-peak audio level", 1 January 2006 (2006-01-01), geneva, pages 1 - 19, XP055000132, Retrieved from the Internet [retrieved on 20110527]
Attorney, Agent or Firm:
SCHELLER, James C. et al. (1279 Oakmead ParkwaySunnyvale, California, US)
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