The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
Dec. 08, 2003
Susumu Tsuchida, Tokyo, JP;
Susumu Tsuchida, Tokyo, JP;
Sony Corporation, , JP;
Abstract
The present invention relates to a video-signal processing system, a video-signal processing apparatus and method, a recording medium, and a program for immediately recovering from loss of synchronization while encrypting/decrypting a video signal. An encryption processing unitencrypts a frame number Tx, which has been obtained by counting vertical control pulses of a video signal, and transmits the frame number Tx together with an unencrypted frame number Tx and an H/V control pulse. A decryption processing unitdecrypts the encrypted frame number Tx so as to generate a frame number Rx and supplies the frame number Rx together with the frame number Tx and the vertical control pulses to a correcting unitThe correcting unitgenerates a pseudo load pulse when the frame numbers Tx and Rx do not match with each other 16 consecutive times, and supplies the pseudo load pulse to the encryption processing unitand the decryption processing unitThe present invention can be applied to a display device compatible with digital television.