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Method for common interface (CI) card interface to be compatible with condition access (CA) card

A technology of card interface and card detection, which is applied in the direction of selective content distribution, image communication, electrical components, etc., can solve the problems of high cost of big cards, restrict the promotion of big card products, increase system costs, etc., and achieve the effect of reducing the cost of use

Inactive Publication Date: 2012-07-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this is that the cost of large cards is higher
[0003] The cost of large cards directly increases the cost of the system, which is a large expense for broadcasting and TV suppliers and consumers, which seriously restricts the promotion of large card products
But now there is no system that can be compatible with big cards and small cards (CA cards) at the same time, that is, there is no system that can satisfy the use of big cards (CI cards) and small cards (CA cards) at the same time

Method used

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  • Method for common interface (CI) card interface to be compatible with condition access (CA) card
  • Method for common interface (CI) card interface to be compatible with condition access (CA) card

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0020] like figure 1 Shown the method that the CI card interface of the present invention is compatible with the CA card, comprising:

[0021] Connect the power pin (VCC), ground pin (GND), card detection pin (SCDETEC), card enable pin (SCVCCEN), reset pin (SCRST), data pin ( SCDATAIN) and the clock pin (SCCLK) are respectively connected to the CI card (big card) interface through the card sleeve, so that the corresponding pins in the CI card interface can be multiplexed;

[0022] When the CI card interface is working, it judges and detects the CA card through the UART mode of the corresponding pin on the CPU side of the system. When the CA card is detected, the CI card interface reads and writes the CA card. According to the properties of each pin of the CA card, configure the PIO and other characteristics of the corresponding pins on the CPU side of the system, so that the CA card can work normally through the CI card interface. The CI card interface performs operations su...

Embodiment 2

[0025] On the basis of embodiment 1, the corresponding connection of the power supply pin of CA card and the ground pin and the pin of the same function in the CI card interface are multiplexed, and the card detection pin of CA card, card enabling pin, reset Pins, data pins and clock pins are respectively connected to other arbitrary pins in the CI card interface according to the input and output directions of the pins, so as to realize the configuration of corresponding pins on the CPU side of the system according to the properties of each pin of the CA card The PIO feature enables the CA card to work normally through the CI card interface.

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Abstract

The invention relates to a method for a common interface (CI) card interface to be compatible with a condition access (CA) card, which comprises respectively connecting a power supply pin, a ground connection pin, a card detection pin, a card enabling pin, a reset pin, a data pin and a clock pin of the CA card with corresponding pins with the same function in the CI card interface to enable corresponding pins of the CI card interface to be reused; and enabling the CA card to normally work through the CI card interface when the CI card interface reads and writes the CA card by controlling a system central processing unit (CPU) connected with the pins of the CI card interface and configuring process input output (PIO) characteristics of corresponding pins of the system CPU according to characteristics of the pins of the CA card. The method for the CI card interface to be compatible with the CA card is capable of enabling equipment of a digital television, a set top box or the like to meet using requirements of a large card (a CI card) and a small card (the CA card), facilitates popularization of large card products, and simultaneously reduces using cost of radio and television equipment.

Description

technical field [0001] The invention relates to a method for compatibility of different signals in a digital television, specifically a method for a CI (Common Interface) card interface to be compatible with a CA (Condition Access) card. Background technique [0002] In the equipment application of the radio and television system, in order to adapt to the different conditions of the CA (Condition Access) system in various parts of China, the digital TV receiving equipment proposes a machine-card separation scheme based on the CI (Common Interface) interface. The machine-card separation scheme of the CI interface is to redefine the pins based on the PCMCIA physical interface, to control the output and input of the TS (Transport Stream) stream, and to perform descrambling in the big card (CI card). The disadvantage of this is the higher cost of large cards. [0003] The cost of large cards directly increases the system cost, which is a relatively large expense for broadcastin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/418
Inventor 袁园周志武杨艳辉周均潘贡罗欢王瑛陈杰
Owner SICHUAN CHANGHONG ELECTRIC CO LTD