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CAM card, CAM card-based multicast and restoration implementation method and CAM card device

A technology for realizing method and card device

Active Publication Date: 2017-07-11
SHENZHEN STATE MICRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a CAM card, a CAM card-based multicast and repair implementation method, and a CAM card device, aiming at solving the problem of limited CI interface speed, CAM card can only support low broadband requirements and Time-sensitive business, but unable to support the technical problem of CAM card integrated program code stream packet error correction and retransmission repair function, can effectively solve the CI interface performance bottleneck of the current CAM card network transmission performance, making the CAM card based on The network transmission can normally receive the program code stream data packets and related repair packages, so as to perform the code stream error correction and repair function, breaking through the limitation of CI interface as a virtual network card transmission bandwidth, so that the CAM card has a mature user experience, and the function integration is simplified , the business value has been improved, and the core value of IPTV CAM card has been further expanded

Method used

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  • CAM card, CAM card-based multicast and restoration implementation method and CAM card device
  • CAM card, CAM card-based multicast and restoration implementation method and CAM card device
  • CAM card, CAM card-based multicast and restoration implementation method and CAM card device

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Embodiment 1

[0017] Such as figure 1 as shown, figure 1 It is a block diagram of a specific implementation process of a CAM card-based multicast and repair implementation system provided by an embodiment of the present invention. The multicast and repair implementation system provided by an embodiment of the present invention includes but is not limited to a host computer and a CAM card device. The CAM card device Including CAM card, multicast repair client.

[0018] In this embodiment, the host is configured to select a program URL (Uniform Resource Locator, Uniform Resource Locator) corresponding to the multicast program from the program list according to a user operation. Wherein, the host may be a playback device with a physical network card such as a digital TV or a network set-top box, and the host selects a program URL from a program list.

[0019] The CAM card is used to obtain the program URL from the host, and send the program URL to the multicast repair client.

[0020] The m...

Embodiment 2

[0036] see figure 2 , figure 2 It is a flow chart of the CAM card-based multicast and repair implementation method provided by the embodiment of the present invention, wherein, the relevant systems of the present embodiment multicast and repair implementation method can refer to the CAM card-based multicast and repair method described in Embodiment 1. The restoration implementation system is not limited within the scope of easy combination and understanding by those skilled in the art.

[0037] Wherein, the implementation method of multicast and repair described in this embodiment includes but not limited to the following steps.

[0038] Step S200, the CAM card obtains the program URL from the host, and sends the program URL to the multicast repair client.

[0039] Step S201, the multicast repair client analyzes the program URL, and searches for the IP:PORT information of the repair link corresponding to the program.

[0040] Step S202, the multicast repair client sends t...

Embodiment 3

[0049] see image 3 , image 3 It is a block diagram of a functional module of the CAM card device provided by the embodiment of the present invention, wherein a host 31 and a multicast repair server 32 are also shown.

[0050] In a preferred embodiment, one of the minimum implementation bodies of the CAM card device 33 in this embodiment includes a CAM card 330 and a multicast repair client 331 .

[0051] The CAM card 330 is configured to obtain a program URL from the host 31 and send the program URL to the multicast repair client 331 .

[0052] The multicast repair client 331 is configured to analyze the program URL, and search for the IP:PORT information of the repair link corresponding to the program.

[0053] The multicast repair client 331 is used to send the IGMP JOIN data protocol packet and the RTCP / RTP link for code stream repair according to the IP:PORT information analyzed and searched for, and to open the multicast receiving mode for receiving multicast and / or...

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Abstract

The present invention belongs to the technical field of CAM cards and provides a CAM card, a CAM card-based multicast and restoration implementation method and a CAM card device. The method comprises the steps of sending a program URL to a multicast restoration client by the CAM card; acquiring an IGMPJOIN data protocol packet and an RCTP / RTP link, corresponding to the program URL, from the multicast restoration client by the CAM card, and acquiring a multicast code stream data packet and / or a restoration code stream data packet of the program through an TS interface by the specified CAM card itself. According to the technical scheme of the invention, the performance bottleneck problem of a CI interface can be effectively solved. In this way, the CAM card can normally receive the multicast code stream data packet and the restoration code stream data packet to realize the error correction and restoration function for code streams.

Description

technical field [0001] The invention belongs to the technical field of CAM cards, and in particular relates to a CAM card and a method for realizing multicast and repair thereof, and also relates to a CAM card device and a method for realizing multicast and repair based on the CAM card. Background technique [0002] CAM (Conditional Access Module, Conditional Access Module), or conditional access card, CAM card, is a product that can be customized by operators and is closely related to personalization. Its main function is to control the user's authority to watch authorized digital TV programs (including audio, video, data, etc.). Paid service for digital television programs. The digital TV host outputs the encrypted transport stream to the CAM, and the CAM decrypts the transport stream, and then outputs the transport stream to the digital TV host to realize the authorized operation of the digital TV program. During this process, users need to interact with CAM, such as ch...

Claims

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Application Information

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IPC IPC(8): H04N21/418H04N21/6405
CPCH04N21/418H04N21/6405
Inventor 车明贤刘学文
Owner SHENZHEN STATE MICRO TECH CO LTD
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