Patent ID: 7426274
Filing Date: 2008-09-16
Classification: G06F,H04N

Abstract:
1. A pseudo random number generator comprising: a cipher unit to generate a sequence of ciphering bits to cipher a stream of data including at least video data; and a state machine coupled to the cipher unit to also use the ciphering unit to generate a plurality of pseudo random numbers based on selected ones of said cipher bits wherein the state machine is equipped to transition to a continuous clocking state that includes, upon power on or reset, causing the cipher unit to be continuously clocked to introduce entropy into the cipher unit, wherein the state machine operates in one of four states: a continuous clocking state (E and during operating the state machine enters state E from state E from state E in state E in the active state, the cipher unit is used to generate ciphering bits to cipher the video before transmitting to a video receiving device and the cipher unit is not available for pseudo random number generation, from the active state, the state machine transitions back to E