Patent ID: 8166499
Filing Date: 2012-04-24
Classification: H04N

Abstract:
1. A method for transmitting first and second content to a receiver via a digital video interface, the first content having a first format, the second content having a second format, and the first and second content having a plurality of vertical blanking intervals, the method comprising: authenticating that the receiver is authorized to receive the content from a transmitter; transmitting the first content as first encrypted content in the first format; detecting a request to transition from the first content to the second content; signaling that the first content will be transmitted unencrypted after a next vertical blanking interval associated with the first format; responsive to detecting the request to transition, transmitting the first content unencrypted after the next vertical blanking interval associated with the first format; adjusting the transmitter to transmit the second content in the second format; waiting for the receiver to identify a vertical blanking interval; after the adjusting the transmitter, signaling that the second content will be encrypted after another next vertical blanking interval associated with the second format; and transmitting the encrypted second content in the second format after the another next vertical blanking interval associated with the second format, wherein the receiver receives content without loss of authenticated communication caused by differing attributes of the first format and the second format in changing from the first format to the second format.