Patent ID: 7613300
Filing Date: 2009-11-03
Classification: H04L,H04N

Abstract:
1. A packet based high bandwidth copy protection (HDCP) method comprising: connecting a multimedia source device and a multimedia sink device by way of a single line cable; setting a hot plug detect (HPD) signal to a HPD HI value by the multimedia sink device; passing the HPD HI signal from the multimedia sink device to the multimedia source device; configuring the single line cable as an auxiliary channel by the multimedia source device in response to the HPD HI signal; synchronizing the multimedia source device and the multimedia sink device; setting the HPD signal to an HPD LO signal by the multimedia sink; configuring the single line cable as a main link by the multimedia source device after the source device and the sink device are synchronized; forming an HDCP encrypted audio/video (A/V) data stream by: passing the HDCP encrypted audio/video (A/V) data stream from the multimedia source device to the multimedia sink device by way of the single line cable; and decrypting only those packets identified by the control packet.