公开(公告)号：US20170223232A1

公开(公告)日：2017-08-03

申请号：US15484414

申请日：2017-04-11

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： KIRAN SRINIVAS CHALLAPALI ,  BIN DONG ,  DAGNACHEW BIRRU

IPC: H04N5/08 ,  H04N21/426 ,  H04N5/46 ,  H04N5/21 ,  H04N5/44

CPC classification number: H04N5/08 ,  H04N5/21 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42607

Abstract: Detecting the presence of a television signal embedded in a received signal including the television signal and noise. Either first-order or second order cyclostationary property of the signals may be used for their detection. When the first-order cyclostationary property is used, the received signal is upsampled by a factor of N, a synchronous averaging of a set of M segments of the upsampled received signal is performed, an autocorrelation of the signal is performed; and the presence of peaks in the output of the autocorrelation function is detected. When the second order cyclostationary property of the signal is used, the received signal is delayed by a fixed delay (symbol time), the received signal is multiplied with the delayed version, and a tone (single frequency) in the output is detected.