Title:
SYSTEM FOR ADJUSTING LOUDNESS OF AUDIO SIGNALS IN REAL TIME
Document Type and Number:
WIPO Patent Application WO/2013/154823
Kind Code:
A3
Abstract:
A method of adjusting a loudness of an audio signal in real time may include receiving an electronic audio signal and dividing the audio signal into a plurality of frames. Processing of the frames may be performed in real time. The processing may include measuring initial loudness values for blocks of samples in a frame to produce a plurality of initial loudness values, and computing a weighted average of at least some of the initial loudness values. The weights may be selected based on one or more of the recency of the initial loudness values, variation of the initial loudness values, and estimated information content of the audio signal. The processing may further include selectively discarding at least some of the loudness values that reach an adaptive loudness threshold. Weights can be adjusted based on the variation of the loudness values of the audio signal.
Inventors:
TRACEY JAMES (US)
Application Number:
PCT/US2013/033913
Publication Date:
April 24, 2014
Filing Date:
March 26, 2013
Export Citation:
Assignee:
DTS LLC (US)
International Classes:
H04R3/00; H03G3/30; H03G3/32; H03G5/16; H04R5/04; H04S7/00
Foreign References:
| US7848531B1 | 2010-12-07 | |||
| US20110150242A1 | 2011-06-23 | |||
| US20040044525A1 | 2004-03-04 |
Attorney, Agent or Firm:
KING, John, R. (Martens Olson & Bear, LLP,2040 Main Street, 14th Floo, Irvine CA, US)
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