Apparatus and related method for sharing address and data pins of a cryptocard module and external memory

A technology for digital TV systems and information receivers, applied to parts of TV systems, parts of color TVs, analog security/tolling systems, etc., can solve the problem of increasing the total number of pins, increasing the coverage of host back-end integrated circuits 30, Improve the manufacturing cost of the host back-end integrated circuit 30, etc., to achieve the effect of reducing the number of pins, reducing the circuit size and manufacturing cost

Inactive Publication Date: 2006-08-09
MEDIATEK INC
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AI Technical Summary

Problems solved by technology

In addition, the demultiplexer 32 uses at least two transport stream ports TS1, TS2 to receive transport stream data, and the transport stream ports TS1, TS2 each use multiple pins, which also increases the number of pins used by the host backend integrated circuit 30. The tota

Method used

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  • Apparatus and related method for sharing address and data pins of a cryptocard module and external memory
  • Apparatus and related method for sharing address and data pins of a cryptocard module and external memory
  • Apparatus and related method for sharing address and data pins of a cryptocard module and external memory

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Embodiment Construction

[0029] Please refer to figure 2 , which is a functional block diagram of the first embodiment of an information receiver (such as the digital television system 100). as figure 1 As shown in the digital TV system 10 , the digital TV system 100 includes a host front-end integrated circuit 110 , a host back-end integrated circuit 120 and a cryptocard module 140 . The host front-end integrated circuit 110 can be a and figure 1 The host front-end integrated circuit 20 shown has the same or similar circuitry, and includes at least a demodulator circuit for removing the carrier frequency from a video signal received from a cable signal source.

[0030] The authentication card module 140 includes a CPU interface for communicating with the host back-end integrated circuit 120. The CPU interface can send data signals, address signals and control signals, because the host back-end integrated circuit 120 only accesses the authentication card module occasionally. 140 , external memorie...

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Abstract

An information receiver, a digital television system and a method for sharing the data pins. The digital television (DTV) system has a front-end circuit comprising a DTV demodulator and a back-end circuit. The back-end circuit includes a DTV demultiplexer, a cryptocard module controller, and an external memory controller. The DTV system also includes an external memory coupled to the back-end circuit, an address bus and a data bus to which the external memory is coupled through a plurality of address and data pins, and a cryptocard module coupled to the front-end circuit and the back-end circuit for performing conditional access and security functions, the cryptocard module having address and data pins coupled to address and data pins of the external memory. The invention reduces the pins and reduces the circuit size of the back end circuit and the producing cost of the DTV.

Description

technical field [0001] The present invention provides an information receiver, especially a digital television system including an authentication card module and an external memory, wherein the address and data pins of the authentication card module are coupled to the address and data ports of the external memory pins to reduce the number of pins used. Background technique [0002] In the digital cable TV system, video / audio content is protected by a conditional access scrambling system. Authentication card module (cryptocard module), such as the deployment point (Point of Deployment, POD) security module (now called cable card, also known as CableCARD) formulated by the American Advanced Television Systems Committee (ATSC), or digital TV Broadcast common interface (Digital VideoBroadcasting Common Interface, DVB-CI) module, which can transmit TV content to consumer's receiver and machine terminal (i.e. host device), remove or re-scramble the TV content. The authenticatio...

Claims

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Application Information

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IPC IPC(8): H04N7/16H04N5/00H04N5/44
CPCH04N21/434H04N21/4623H04N7/163H04N21/43607
Inventor 陈威仁叶有民
Owner MEDIATEK INC
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