Patent ID: 7756136
Filing Date: 2010-07-13
Classification: H04L,H04N

Abstract:
1. A process for determining spatial and temporal loss in a packet-based video broadcast system in an encrypted environment on a digital network, comprising the steps of: collecting video coding layer information with a corresponding timestamp at an unencrypted head end of a video stream using a first probe deployed at an unencrypted location in the digital network; simultaneously collecting network layer information with a corresponding timestamp at an encrypted downstream end of the video stream using a second probe deployed at an encrypted location in the digital network; exporting the video coding layer information with the corresponding timestamp to a collector in the digital network; transmitting the network layer information with the corresponding timestamp to the collector upon occurrence of a loss event; correlating the video coding layer information with the network layer information in the collector using the respective timestamps; and computing spatial and temporal loss in the video stream from the head end to the downstream end using the correlated information to determine impairments in the video stream from the loss event.