Methods for broadcasting and receiving scrambled multimedia programmes, terminal and network headend for said methods

A technology for multimedia programs and network headers, which is applied in broadcasting, broadcasting devices, broadcasting system control, etc., and can solve problems such as increasing bandwidth and increasing numbers

Active Publication Date: 2009-07-08
VIACCESS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This then increases the number of copies of the same service message being broadcast, thus increasing the bandwidth necessary to broadcast them

Method used

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  • Methods for broadcasting and receiving scrambled multimedia programmes, terminal and network headend for said methods
  • Methods for broadcasting and receiving scrambled multimedia programmes, terminal and network headend for said methods
  • Methods for broadcasting and receiving scrambled multimedia programmes, terminal and network headend for said methods

Examples

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Embodiment Construction

[0042] figure 1 Shows a system 2 for broadcasting and receiving multimedia messages. System 2 includes one or more network headends that broadcast a multimedia program in scrambled form, and a number of terminals that receive the scrambled multimedia program and descramble the received multimedia program so that the multimedia program can be used. For example, the terminal uses the received multimedia program to generate a video stream that can be displayed on the screen in plain text.

[0043] To simplify figure 1 , only one network headend 4 and three terminals 6, 7 and 8 are shown in the figure.

[0044] Network Headend 4 includes:

[0045] Entitlement control message (entitlement control message: ECM) generator 10;

[0046] Entitlement Management Message (EMM) generator 12;

[0047] a module 14 adapted to broadcast the content of the multiplex to one or more broadcast-multicast addresses; and

[0048] A dedicated messaging manager (PMM) 16 capable of broadcasting ser...

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Abstract

The invention concerns a method for broadcasting a plurality of multimedia programmes generated by operators of different services, whereby one or more network headends broadcast (in 102) on a reference multicast address a list associating identifiers of service operators with at least one first level service multicast address, the reference multicast address being previously known to all the terminals capable of receiving and multiplexing broadcast multiplexed contents and said reference multicast address being different from all the broadcasting multicast addresses.

Description

technical field [0001] The present invention relates to a method of broadcasting and receiving scrambled multimedia programs, and a terminal and a network head end for realizing the method. Background technique [0002] More precisely, there is a method of broadcasting multimedia programs produced by different service operators through a network. In the existing broadcast method: [0003] Each network headend multiplexes one or more multimedia programs scrambled with a control word and a cipher of the control word, thereby obtaining the multiplexed content, which is then broadcast to the terminals via the network; and [0004] • In parallel, one or more network headends broadcast service messages specific to each service operator in order to modify the operation of each terminal, thereby authorizing or disabling the terminal's access to multimedia programmes. [0005] There is also a method of receiving a multimedia program broadcast by the above-mentioned broadcasting met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/22H04H20/00H04H20/42H04H60/23H04N7/16H04N7/167H04N7/24
CPCH04L63/062H04L63/0428H04N21/2362H04N21/63345H04N7/162H04N21/435H04N21/6125H04N21/6405H04N7/1675H04N21/235H04H20/423H04H60/23H04L12/18H04L12/22
Inventor P·鲍特鲁普P·卡尔斯A·切瓦里尔F·加维奥特S·赫维尤V·普里欧J·托米尼特
Owner VIACCESS SA
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