CPC H04N 21/4394 (2013.01) [H04N 21/44008 (2013.01); H04N 21/44222 (2013.01); H04N 21/44236 (2013.01); H04N 21/83 (2013.01); G10L 19/018 (2013.01)] | 21 Claims |
1. An apparatus comprising:
at least one memory;
instructions; and
processor circuitry to execute the instructions to:
detect a first watermark embedded in an audio stream associated with media, the first watermark embedded and detected in the audio stream based on a first watermarking technique;
detect a second watermark embedded in the audio stream, the second watermark embedded and detected in the audio stream based on a second watermarking technique different than the first watermarking technique;
assign the first watermark to a first monitoring track and to a second monitoring track, the first monitoring track limited to watermarks embedded in the audio stream based on the first watermarking technique, the second monitoring track limited to watermarks embedded in the audio stream based on any of the first or second watermarking techniques;
group the first and second watermarks to form a media detection event when the second watermark is assigned to the second monitoring track; and
cause transmission of the media detection event to a data collection facility.
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