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:
Dec. 24, 2002
Filed:
Oct. 26, 1999
Yossef Tsuria, Shoham, IL;
Gene Itkis, Maale Adumim, IL;
Yaron Sella, Jerusalem, IL;
Yishai Sered, Jerusalem, IL;
NDS Limited, Middlesex, GB;
Abstract
This invention discloses a symbol-display subscriber unit for use with a broadcast system, the broadcast system including a headend and a network operative to transmit a composite signal from the headend to a multiplicity of subscriber units, the composite sigincluding an encoded broadcast signal encoded in accordance with a plurality of control words (CWs) and a plurality of encryption control messages (ECMs), each of the plurality of ECMs being associated respectively with one of the plurality of CWs and including CW generating information, the multiplicity of subscriber units including at least one said symbol-display subscriber unit, said symbol-display subscriber unit including: a receiver receiving the composite signal from the network, security apparatus in operative engagement with the receiver, the security apparatus receiving each of the plurality of ECMs from the receiver and generating the associated CW from the CW generating information comprised within each said ECM. and a decoder for decoding the encoded broadcast signal for display on a display device, the decoder receiving the encoded broadcast signal from the receiver and receiving the CW from the security apparatus, wherein the security apparatus supplies symbol display information to the decoder, and the decoder provides a symbol to the display device for display thereon, the symbol being based, at least in part, on the symbol display information. A method for producing a symbol is also disclosed.