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Method and system for implementing network time-shifted television supporting DVB CAS

A technology of network time shifting and implementation method, which is applied in the direction of TV, pulse modulation TV signal transmission, electrical components, etc. It can solve problems such as the difficulty of precise synchronization and positioning, the irregular jump of authorization information, and the failure of normal extraction of I frames, etc., to achieve The effect of good user experience

Inactive Publication Date: 2010-01-20
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] However, when performing network time-shift operations on DVB CAS scrambled programs, there are difficulties in accurate synchronization and positioning, I frame cannot be normally extracted, and authorization information jumps irregularly. unscrambled program stream

Method used

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  • Method and system for implementing network time-shifted television supporting DVB CAS
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  • Method and system for implementing network time-shifted television supporting DVB CAS

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Embodiment Construction

[0036] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0037] figure 1 Shown is a network time-shift TV system architecture diagram supporting DVB CAS, the system consists of DVB-IP gateway, TVS network server, IPQAM-based cable TV access network or Ethernet access network, TVS client (cable TV client or IPTV client) configuration.

[0038] figure 2 Shown is the self-adaptation of the TVS network server to the client access mode, in which the DVB-C client can only choose the cable TV access network based on IPQAM, the IPTV client can only choose the Ethernet access network, and the dual-mode The client can select a cable TV access network or an Ethernet access network according to the status of the access network.

[0039] like figure 1 as well as figure 2 As shown, in the network time-shifted television system supporting DVB CAS of the present invention, the cable TV network and the E...

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Abstract

The invention provides a method and a system for implementing network time-shifted television supporting DVB CAS, which avoids specific CAS characteristics, adopts a general logic scheme, realizes unified treatment for different CAS and adapts to the present situation that the prior DVB-C or IPTV digital television services adopt a plurality of CAS. The method for implementing network time-shifted television supporting DVB CAS at least comprises a time-shift processing method which applies to TVS network servers and supports DVB CAS scrambling single-program stream data, a network time-shifted television implementation method simultaneously applicable to DVB CAS based on IPQAM access and Ethernet access, and a client software implementation method applicable to DVB CAS network time-shifted television. According to the method and the system for implementing network time-shifted television supporting DVB CAS, the problems of the network time-shifted television in processing DVB CAS scrambling programs can be overcome, and the bottleneck problem of the network time-shifted television in the environment of popularizing digital television is solved.

Description

technical field [0001] The present invention relates to a processing method for DVBCAS (Digital Video Broadcasting-Conditional Access System: Digital Video Broadcasting Conditional Access System) scrambled programs when developing network time-shifted television (TVS) services in a DVB-C or IPTV environment, specifically relating to A method and system for realizing network time-shifted TV supporting DVB CAS. Background technique [0002] As technology advances, traditional broadcast television services are being replaced by interactive television services. In the interactive TV service, network time-shifted TV (TVS: TV Shifting) is an important service. The emergence of network time-shifted TV can provide users with the ability to independently select program segments within a certain time range, greatly improving the user's viewing experience, and is an important component of interactive TV services. [0003] However, when performing network time-shift operations on DVB ...

Claims

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Application Information

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IPC IPC(8): H04N7/167H04N7/24
Inventor 王劲林潘梁陈君王蕾孙鹏
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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