Patent ID: 7979910
Filing Date: 2011-07-12
Classification: H04L,H04N

Abstract:
1. A data reproducing apparatus comprising: a receiver receiving content data and outputting the content data to an output unit prepared in advance; and a transmitter transmitting said content data to said receiver when it is detected that authentication of said receiver is successful, said transmitter including an authenticating unit transmitting, before said content data is transmitted, a request to start authentication to said receiver, and executing an authentication process after a predetermined time passes from the time when the request is transmitted, said transmitter repeating the transmission of said request to start authentication and the execution of said authentication process when it is detected, based on a result of the authentication process, that the authentication of said receiver is unsuccessful, said predetermined time being variably set according to the number of times said request to start authentication is transmitted and said authentication process is executed, said authentication process being an authentication process complying with HDCP (High-bandwidth Digital Content Protection), said transmitter including a connection detecting unit detecting that said receiver is connected through a communication cable, and said request to start authentication being transmitted after said connection detecting unit detects that said receiver is connected, said transmitter further including a parameter requesting unit transmitting to said receiver a request for a parameter indicating a characteristic of said output unit, after said connection detecting unit detects that said receiver is connected, said transmitter generating a dummy video signal based on said parameter received from said receiver in response to said request transmitted by said parameter requesting unit, and transmitting said generated dummy video signal as said request to start authentication to said receiver, and said transmitter being mounted on a DVD (Digital Versatile Disc) apparatus reproducing said content data from a DVD and said receiver being mounted on a television receiver.