US 11,694,706 B2
Adaptive energy limiting for transient noise suppression
John Fredric Lindstrom, Stockholm (SE); and Carl Samuel Sonning, Stockholm (SE)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Dec. 31, 2021, as Appl. No. 17/566,950.
Application 17/566,950 is a continuation of application No. 16/702,270, filed on Dec. 3, 2019, granted, now 11,217,262.
Claims priority of provisional application 62/936,751, filed on Nov. 18, 2019.
Prior Publication US 2022/0122625 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 21/0216 (2013.01); G10L 21/0264 (2013.01); G10L 25/30 (2013.01); G10L 25/84 (2013.01); H04M 3/56 (2006.01); G10L 21/0208 (2013.01); G10L 21/0232 (2013.01); G10L 25/78 (2013.01)
CPC G10L 21/0216 (2013.01) [G10L 21/0208 (2013.01); G10L 21/0232 (2013.01); G10L 21/0264 (2013.01); G10L 25/30 (2013.01); G10L 25/84 (2013.01); H04M 3/568 (2013.01); G10L 2025/786 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
setting a ceiling level of a limiter module through which audio signals pass to a full-scale level;
receiving, via a data interface, data that comprises a portion of a first audio signal, the first audio signal being one of the audio signals that pass through the limiter module;
determining a maximum amplitude of the portion of the first audio signal;
evaluating the portion of the first audio signal with a neural network to provide a voice likelihood estimate for the portion of the first audio signal;
determining, based on the maximum amplitude and the voice likelihood estimate, that the portion of the first audio signal includes noise;
decreasing the ceiling level of the limiter module from the full-scale level to a decreased ceiling level in response to determining that the portion of the first audio signal includes noise; and
providing, to the limiter module through which the audio signals pass, the decreased ceiling level to limit an amount of energy of the first audio signal.