Patent ID: 9667911
Date: 2017-05-30
CPC Classifications: G11B,H04L,H04N

Claim:
1. A method for controlling copy count using a Digital Transmission Content Protection (DTCP) standard, the method comprising: maintaining an original master copy of a first video content in a personal video recorder (PVR); maintaining a maximum copy count number; copying the original master copy as a copy asset and transferring the copy asset from the PVR to a second video device on request for check out by the second video device and marking the transferred copy asset as Copy No More (CNM), and decrementing the copy count, and further creating and storing an abbreviated representation of the copy asset; receiving the copy asset checked back in to the PVR from the second video device in response to a MOVE command, the received copy asset being an externally created version of the abbreviated representation of the checked-out copy; comparing the checked in copy asset with the original master copy to determine if the copy asset and the master copy are from the identical first video content, and if so incrementing the copy count, wherein the abbreviated representation takes the form of a hash constructed from a hashing function.