US 11,741,975 B2
Methods and apparatus to inspect characteristics of multichannel audio
Khaldun Karazoun, Tampa, FL (US)
Assigned to The Nielsen Company (US), LLC, New York, NY (US)
Filed by The Nielsen Company (US), LLC, New York, NY (US)
Filed on Sep. 11, 2020, as Appl. No. 17/18,904.
Application 17/018,904 is a continuation of application No. 16/363,754, filed on Mar. 25, 2019, granted, now 10,777,211.
Application 16/363,754 is a continuation of application No. 15/612,960, filed on Jun. 2, 2017, granted, now 10,242,680, issued on Mar. 26, 2019.
Prior Publication US 2021/0134305 A1, May 6, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/018 (2013.01); G10L 19/008 (2013.01); G10L 19/16 (2013.01); G10L 21/055 (2013.01); G11B 27/10 (2006.01)
CPC G10L 19/018 (2013.01) [G10L 19/008 (2013.01); G10L 19/167 (2013.01); G10L 21/055 (2013.01); G11B 27/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
means for detecting watermarks in a first audio subchannel and a second audio subchannel of a multichannel audio signal;
means for comparing watermarks, the means for comparing watermarks to compare a first number of watermarks detected in the first audio subchannel and a second number of watermarks detected in the second audio subchannel to determine whether the first audio subchannel and the second audio subchannel were watermarked in accordance with a watermark encoder configuration;
means for determining timestamps, the means for determining timestamps to:
determine a first timestamp from a first watermark detected in the first audio subchannel; and
determine a second timestamp from a second watermark detected in the second audio subchannel;
means for comparing timestamps, the means for comparing timestamps to compare a first time associated with the first timestamp and a second time associated with the second timestamp to determine whether the first audio subchannel and the second audio subchannel were watermarked in accordance with the watermark encoder configuration; and
means for distributing an alert in response to a determination that the first audio subchannel and the second audio subchannel were not watermarked in accordance with the watermark encoder configuration.