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CI interface data transmission method based on time standard

A technology of time reference and transmission method, which is applied in the direction of data exchange through path configuration, analog security/charging system, etc. It can solve problems such as low reliability, complex program structure implementation, and low timeliness of message mechanism, so as to reduce complexity degree, reduce information redundancy, and improve reliability

Inactive Publication Date: 2007-02-14
LG ELECTRONICS (CHINA) R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a CI interface data transmission method based on a time reference, which is used to solve the problems of low timeliness, low reliability and complicated program structure realization of the existing message mechanism.

Method used

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  • CI interface data transmission method based on time standard
  • CI interface data transmission method based on time standard

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Embodiment Construction

[0023] The existing message delivery mechanism cannot effectively judge the timeliness of the message through the data in the message in the message processing program module. When a message of the same type is continuously received, it cannot respond simply and quickly, which may easily cause data redundancy. Generally, after receiving the messages sent by each module, the message category of the same channel can only be identified through the message identifier. For the real-time performance of the same category of information, the data redundancy can only be reduced by setting multiple status flag bits and the state machine structure. Remain.

[0024] In the machine-card separation data transmission based on the CI interface, the data transmission from the host side to the descrambling module side is also mostly sent by messages. Due to the difference in processing speed between the host end and the descrambling module end, it is necessary to consider that the host end con...

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Abstract

The invention discloses a method for transmitting data via CI interface based on time reference, which is applied to digital television system and includes a host and a descramble module. The digital television host and the descramble module establish communication via the CI interface, in which, the host receives the data containing time reference and gets the time reference from the data. Based on the current status flag-code of data processing, the host controls the data transmitting process via CI interface through comparing the received time reference and the current one.

Description

technical field [0001] The invention relates to a digital television system, in particular to a CI interface data transmission method based on a time reference. Background technique [0002] At present, a simple message mechanism is mostly used to realize the data communication among the various modules of the system. After adopting the CI (Common Interface, public interface) technology, the digital TV receiving host and the external descrambling module need to complete the message transmission on the command interface through a CI protocol stack, and at the same time, the processing speed and mechanism of the external descrambling module may be different from those on the host side. There is a difference. [0003] CI interface is a transmission interface and protocol defined for the realization of machine-card separation technology, including command interface and TS (Transport Stream, transport stream) stream interface, among which the command interface is particularly co...

Claims

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Application Information

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IPC IPC(8): H04N7/16H04L12/28
Inventor 吴宏涛
Owner LG ELECTRONICS (CHINA) R&D CENT CO LTD