Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2006-04-25
2006-04-25
Ton, Dang (Department: 2666)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S465000
Reexamination Certificate
active
07035290
ABSTRACT:
A communication system including a transmitter, a receiver, and a serial link, that is capable of transmitting packets of data (e.g., frames of video data) over the link. The transmitter and receiver are operable in any selected one of a transmission mode (in which the data are transmitted over the link from the transmitter to the receiver) and a mute mode in which transmission of data over the link has been interrupted. Typically in the transmission mode, encrypted video data are transmitted and decrypted by the receiver. Other aspects of the invention are transmitters and receivers for use in, and methods implemented by, any embodiment of such system. Typically, each transition between transmission mode and mute mode operation requires that the device undergoing the transition (whether a transmitter or receiver) receives a warning that the transition is to occur. In response to such warning, a transmitter in the transmission mode waits for the next packet boundary, or more generally the Nth packet boundary after the warning, before entering the mute mode. If the transmitter encrypts video during the transmission mode, the cipher engine is allowed to finish its work on the current frame (and any other frame to be encrypted before entry into the mute mode) but is not allowed to send any signal that affects any frame occurring after entry into the mute mode. When the transmitter and receiver include cipher engines, each cipher engine including a state machine, operation of the state machines should freeze during the mute mode, and the cipher engines' outputs should be driven to black or another predetermined state or otherwise hidden or suppressed.
REFERENCES:
patent: 5845201 (1998-12-01), Funke et al.
High-Bandwidth Digital Content Protection System, Revision 1.0, by Intel Corporation, Feb. 17, 2000, pp. 1-60.
High-Bandwith Digital Content Protection Ssytem Revision 1.0 Erratum, by Intel Corporation, Mar. 19, 2001, pp. 1-9.
Upstream Link for High-bandwidth Digital Content Protection, Revision 1.00, by Intel Corporation, Jan. 26, 2001, pp. 1-38.
National Institute of Standards and Technology, Draft FIPS for the AES, 48 pages, downloaded from the Internet (from http://csrc.nist.gov/encryption/aes) on Sep. 18, 2001.
Girard & Equitz LLP
Silicon Image Inc.
LandOfFree
Method and system for temporary interruption of video data... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for temporary interruption of video data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for temporary interruption of video data... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3587137