Patent ID: 7802277
Filing Date: 2010-09-21
Classification: H04N

Abstract:
1. A method for inserting a data object into a combined video stream, comprising: receiving a combined video stream comprising program material video data and advertising insertion signals encoded in the program material video data; encrypting a first portion of the combined video data stream thereby creating a first encrypted portion of the combined video data stream for sending to a client device; detecting a first one of the advertising insertion signals in the combined video stream; suspending the encrypting of the combined video stream at the server upon detection of the first one of the advertising signals thereby creating a first unencrypted portion of the combined video data stream for sending to the client device; resuming the encrypting of the combined video data stream after detecting a second one of the advertising insertion signals in the combined video stream and after the occurrence of an I-frame in the combined video data stream, thereby creating a second encrypted portion of the combined video data stream; and sending the first and second encrypted portions and the unencrypted portion of the combined video stream from the server to the client device over a data network, wherein the client device decrypts the first encrypted portion of the combined video data stream and detects the I-frame in the unencrypted portion of the video data stream after the second one of the advertising insertion signals and uses the I-frame to synchronize with the combined video data stream to decrypt the second encrypted portion of the combined video stream.