CMMB conditional access module

A conditional access module and interface technology, applied in electrical components, color TV parts, TV system parts, etc., can solve the problems of high cost, low integration, and difficulty in integrating GSM mobile phones with CMMB receiving hardware. Convenient, highly integrated effects

Active Publication Date: 2009-12-02
KTMICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because mobile phones need network access authentication, CMMB receiving hardware is difficult to integrate into users' huge GSM mobile phones
The current CMMB conditional access solution cannot solve the problem of GSM mobile phone network access detection
[0016] In addition, the current CMMB conditional access solution has disadvantages such as high cost, low integration, and inflexible configuration.

Method used

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Examples

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specific Embodiment

[0035] see in Figure 4 , Figure 5 , taking the mobile phone as an example to introduce the CMMB conditional access solution provided by the present invention.

[0036] In the CA scheme of the present invention, the functional modules related to CMMB conditional reception, including receiving antenna, radio frequency tuner, baseband demodulator and CA smart card, are all completely encapsulated in a physical package, and the physical package can be a MicroSD card , SD card, MiniSD card, CompactFlash card, MultiMedia card, SmartMedia card, PCMCIA card or USB Dongle, etc. The physical packaging into the user terminal adopts very popular hardware interfaces, including SDIO, SPI, USB and so on.

[0037] Among them, in the CMMB conditional reception module, the antenna, the radio frequency tuner and the baseband demodulator together constitute the reception and demodulation of the CMMB signal. The demodulated value-added service programs are scrambled. Utilizing the processing...

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Abstract

The invention discloses a CMMB conditional access module. A radiofrequency tuner, a baseband demodulator and a CA intelligent card are packaged in a physical package, and the radiofrequency tuner receives service programs authorized by CMMB conditional access; and the baseband demodulator and the CA intelligent card finish the demodulation and decryption processing of the service programs together and then finish data decryption. An optional audio and video decoder can code decrypted data. The access module can be connected with a user terminal through an output interface, support CMMB functions, and can play CMMB programs at any place where the CMMB programs are supported. The CMMB conditional access module improves the flexibility of a terminal system, simplifies a structure of the system, and reduces the hardware cost for a CMMB receiving terminal. The CMMB conditional access module is applicable to various broadcasting systems adopting conditional access.

Description

technical field [0001] The invention relates to a conditional access communication technology, in particular to a CMMB conditional access module. Background technique [0002] The China Mobile Multimedia Broadcasting (CMMB) standard is a mobile multimedia standard developed by China itself and fully possessing independent intellectual property rights. The main application areas include: mobile phones, portable TVs, handheld navigators, PDA, MP4, notebook computers and other small-screen portable handheld terminals, as well as mobile information terminals on cars, trains, ships, and airplanes. [0003] CMMB not only provides free radio and television programs for public welfare, but also provides conditional access (CA) function. CMMB operators can allow authorized users to use value-added services, such as real-time traffic information, stock quotes, etc., through the conditional access system (CAS). Unauthorized users cannot use this service. CMMB encryption authorizatio...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04N5/00H04N7/167H04N21/418H04N21/435
Inventor刘忠志林海清向毅海
OwnerKTMICRO ELECTRONICS