US 11,948,589 B2
Methods, apparatus, and articles of manufacture to identify sources of network streaming services
Zafar Rafii, Berkeley, CA (US); Markus Cremer, Orinda, CA (US); and Bongjun Kim, Evanston, IL (US)
Assigned to Gracenote, Inc., Emeryville, CA (US)
Filed by Gracenote, Inc., Emeryville, CA (US)
Filed on Jun. 28, 2021, as Appl. No. 17/360,605.
Application 17/360,605 is a continuation of application No. 16/238,189, filed on Jan. 2, 2019, granted, now 11,049,507.
Application 16/238,189 is a continuation in part of application No. 15/793,543, filed on Oct. 25, 2017, granted, now 10,733,998, issued on Aug. 4, 2020.
Prior Publication US 2021/0327444 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/018 (2013.01); G10L 19/02 (2013.01); G10L 25/51 (2013.01); H04H 20/95 (2008.01); H04H 60/58 (2008.01); G10L 25/03 (2013.01)
CPC G10L 19/0212 (2013.01) [G10L 25/51 (2013.01); G10L 19/02 (2013.01); G10L 25/03 (2013.01); H04H 60/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
at least one memory;
instructions; and
at least one processor to execute the instructions to at least:
identify a signal bandwidth of a received first audio signal that is obtained by decompressing a second audio signal by:
forming a plurality of frequency spectrums for respective ones of a plurality of time intervals of the received first audio signal;
identifying a plurality of indices representative of cutoff frequencies of respective ones of the plurality of time intervals; and
determining a median of the plurality of indices, the median representative of an overall cutoff frequency of the received first audio signal; and
identify a source of the second audio signal based on the identified signal bandwidth.