Patent ID: 7027599

Claim:
A method of generating a database index of location identifiers of specified features of video, audio and/or auxiliary data material relating to a broadcast program held in a memory device, said data material for the program received by a broadcast data receiver from a remote location in an encrypted form, said broadcast data receiver connected to or integral with a television to allow the generation of the video, audio and/or auxiliary data, the method comprises the steps of: decrypting the received data material after receipt by the broadcast data receiver; parsing the data material to generate a plurality of location identifiers for respective portions of the data material; storing said location identifiers in a database; and locally encrypting said data material prior to storage in said memory device and wherein the data material includes frames or pictures of video and the location identifiers generated refer to features of the video data material selected from the group consisting of: a specified frame of video a group of picture sequence, a time code, and a pictorial temporal reference in order to identify a particular portion of the data material stored in said memory device.