Patent ID: 8411851
Filing Date: 2013-04-02
Classification: H04N

Abstract:
1. method for determining the maximum number of key selection vectors supported by a particular HDCP source, the method comprising: a) transmitting a number of key selection vectors to the particular HDCP source; b) determining whether the particular HDCP source has entered a failure mode in response to the transmitted number of key selection vectors; c) increasing the number of key selection vectors in response to the particular HDCP source not entering the failure mode; d) decreasing the number of key selection vectors in response to the particular HDCP source entering the failure mode; e) transmitting the increased or decreased number of key selection vectors to the particular HDCP source; f) determining whether the particular HDCP source has entered the failure mode in response to the transmitted increased or decreased number of key selection vectors; and g) repeating steps c)-f) until the difference between a lowest number of transmitted key selection vectors resulting in the particular HDCP source entering the failure mode and a highest number of transmitted key selection vectors resulting in the particular HDCP source not entering the failure mode is one.