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 |
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.
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