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Transmission control method of digital television transmission stream and apparatus thereof

A technology of digital TV and transmission control, applied in the direction of pulse modulation TV signal transmission, etc., which can solve the problems of high cost, difficulty in implementing encryption methods, and high degree of computational complexity

Inactive Publication Date: 2009-02-04
HUAYA MICROELECTRONICS (SHANGHAI) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The currently adopted method of encrypting and decrypting the digital TV transmission stream is to encrypt the transmission stream itself, which has a large amount of calculation and high computational complexity, which makes it difficult to implement this encryption method and costs a lot.

Method used

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  • Transmission control method of digital television transmission stream and apparatus thereof
  • Transmission control method of digital television transmission stream and apparatus thereof
  • Transmission control method of digital television transmission stream and apparatus thereof

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Embodiment Construction

[0018] The following is based on Figure 1 to Figure 4 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0019] like figure 1 As shown, the present invention inserts a dedicated controller into the upstream end of the traditional digital television system, and inserts a security control module into the receiving device. The function of the dedicated controller is to generate a floating random value of PID, use this random value to float the PID value of the specified transmission stream, package the random value, add authentication information, and then pack it into a standard TS package, and The TS packet is encrypted, and finally the TS packet is inserted into the transport stream. The function of the security control module is opposite to the function of the dedicated controller at the upstream end. It captures the transmission stream that ...

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Abstract

The invention relates to a transmission controlling method and a device for digital television transport stream, which make random floating to PID value of an appointed transport stream when an uplink port of a digital television system reuses a program and adopts the floated value as the actual PID value of transport stream; the uplink port transports the floating value of PID to a receiving equipment by an encryption mode; the receiving equipment analyzes random rules and obtains the actual PID value of the transport stream according to the appointed PID of the transport stream. The illegal receiving equipment cannot obtain the floating random number of the PID value and receive the program without knowing the encryption mode, a cryptographic key and transmission rules.

Description

technical field [0001] The present invention relates to a transmission control method and device of a digital TV transmission stream, in particular, it relates to the transmission of a digital TV transmission stream which can effectively prevent illegal equipment from receiving TV programs and is compatible with traditional data transmission encryption and decryption Control method and device thereof. Background technique [0002] The basic unit of a digital television (DTV) transport stream (TS) is a transport packet, and each transport packet has a label (PID). Different types of transport packets have different PID values, and transport packets with the same PID value form a type of transport stream. [0003] The digital TV transport stream includes program specific information (PSI) transport streams, audio transport streams, video transport streams and other transport streams of multiple TV programs. The PSI transport stream includes the transport stream of the PAT ta...

Claims

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Application Information

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IPC IPC(8): H04N7/24
Inventor 陈益栋
Owner HUAYA MICROELECTRONICS (SHANGHAI) INC
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