Patent ID: 8339968
Filing Date: 2012-12-25
Classification: H04L,H04N

Abstract:
1. An Audio/Video (AV) signal monitor, comprising: a monitor operable in the Transport Layer of a digital broadcast network, implementing the ISO open system interconnect network model, for inferring Audio/Video (AV) quality of AV signals at the Application Layer of said broadcast network; said monitor continuously performing one or more tests during normal operation of said broadcast network to detect anomalies which exceed predetermined parameters in AV signals transmitted in a transport stream on said broadcast network and received by said monitor, said monitor further continuously performing: examining a picture type field of each picture in said transport stream and, when lost or corrupted data is detected, determining the relative importance of the lost or corrupted data based on the picture type of the picture at which lost or corrupt data is detected; examining a display order field of each picture header in said transport stream to determine whether lost or corrupt data involves multiple pictures within a group of pictures; and examining time code fields in Group Of Pictures (GOP) headers in said transport stream to determine whether lost or corrupted data involves more pictures than the number of pictures associated with a group of pictures header.