METHOD AND SYSTEM FOR DETECTING DISTORTIONS IN DIGITAL TELEVISION SYSTEMS Russian patent published in 2018 - IPC H04N19/154 H04N17/00 

FIELD: digital television.

SUBSTANCE: invention relates to digital television and can be used to diagnose digital television broadcasting systems. In the method for detecting image distortions in a digital television system, the source and monitored digital television signals are received. Split the frame of the source and monitored digital television signal into segments of equal area Se[i] and Sk[i]. Calculate for each pair Se[i] and Sk[i] a pair of histograms of the modulus of the gradient of brightness He[i] and Hk[i] from M intervals. Calculate for He[i] the vector Ve[i], the j-th element of which corresponds to the ordinal number of the j-th interval He[i] in the ordered set of values of the latter, and for Hk[i] the vector Vk[i] whose j-th element corresponds to the ordinal number of the j-th interval Hk[i] in an ordered ascending set of values of the latter. Calculate for each of i the rank correlation coefficient Cr[i] of the vectors Vk[i] and Ve[i]. If Cr[i] does not exceed the Th threshold for i, the fact of the image distortion of the i-th segment in the digital television system is detected.

EFFECT: technical result is to increase the reliability of detecting image distortions at low bandpass requirements reverse channel information about the parameters of the controlled translation and the processing power of the hardware involved.

19 cl, 4 dwg