Patent ID: 7995904

Claim:
A method for trick mode playback, the method including: selecting a key-frame in a recording substantially in the vicinity of a trick mode playback starting position; preparing a first decryption key associated with a key period including the selected key-frame; sending the prepared first decryption key to a descrambler, thereby enabling decryption of video beginning at the selected key-frame; sending a first number P seconds of decrypted video frames, starting at the selected key-frame, at a predetermined speed for a predetermined number of seconds, to a video decoder; in parallel to the sending the P seconds of video frames, choosing at least a second video section to stream to the video decoder; sending a second decryption key associated with the chosen second video section to the descrambler; and repeating the steps of: selecting; preparing; sending the prepared first decryption key; and sending a first number P seconds of decrypted video frames.