Method and apparatus for controlling operation of signal decoder in broadcasting system

A technology for broadcasting signals and controlling signals, which is applied in the field of broadcasting signals and can solve harmful and other problems

Inactive Publication Date: 2004-04-21
IRDETO ACCESS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such control information broadcast by unauthorized broadcasters may be harmful, for example, to the operation of decoders for receiving broadcast signals from authorized broadcasters

Method used

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  • Method and apparatus for controlling operation of signal decoder in broadcasting system
  • Method and apparatus for controlling operation of signal decoder in broadcasting system
  • Method and apparatus for controlling operation of signal decoder in broadcasting system

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Embodiment Construction

[0015] refer to figure 1 , which shows a broadcasting system in which stations 1-3 are coupled together with a multiplexing unit 4. The multiplexing unit 4 comprises modules for scrambling, encoding and compressing the broadcast signals provided by the broadcasting stations 1-3, and modules for multiplexing the digital data streams thus obtained into a digital transport stream . In the embodiment shown, this digital transport stream is modulated by modulator 5 before transmission.

[0016] The operator of the equipment comprising the multiplexing unit 4 and the modulator 5 is responsible for transmitting the signal to receiving equipment of the public, e.g. figure 1 The TV set 6 exemplified in. One or more of Radio Stations 1-3 may be privately owned radio stations operating on a pay TV basis, which means that people who want to watch a program broadcast by a particular radio station have to subscribe to those stations and pay the appropriate cost.

[0017] The transmissi...

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Abstract

In a method and apparatus for controlling the operation of a signal decoder in a broadcasting system, a broadcast signal and an encrypted signature are generated and the signature is added to the signal. The signal together with the signature is broadcasted and received in the decoder, where the signature is decrypted and compared with a verification value. If a match occurs, further operation of the decoder is allowed. If a match does not occur, further operation of the decoder is disallowed.

Description

technical field [0001] The present invention relates to a method and a device for controlling the operation of a signal decoder in a broadcasting system, in particular to a method and a device for broadcasting a signal. Background technique [0002] Several broadcasting methods can be used in a broadcasting system, including satellite broadcasting, terrestrial broadcasting via antenna, and cable broadcasting. The broadcasting of the signal involves the use of analog or digital techniques. Especially in a broadcasting system using digital technology, one digital data stream can be used to broadcast multiple programs from many broadcasting stations. The MPEG II standard is a standard for broadcasting digital signals. According to this standard, a large number of compressed digital data signals from multiple broadcast stations are multiplexed into a single digital transport stream, which can be modulated onto a carrier wave before transmission. [0003] Receiving this broadc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/08H04N7/167
CPCH04N7/1675H04N21/4627
Inventor 曼弗莱德·文·维里切西蒙·保罗·阿什利·里克斯
Owner IRDETO ACCESS
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