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Method for awakening emergency broadcast by subcarriers, DTMB set top box and system

An emergency broadcasting and subcarrier technology, applied in broadcasting circuit devices, broadcasting specific applications, electrical components, etc.

Inactive Publication Date: 2021-05-11
六安富华智能信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide the method, DTMB set-top box and system that are awakened by the sub-carrier for emergency broadcasting, aiming to solve the problem of how the DTMB set-top box responds to emergency messages and plays emergency broadcasting

Method used

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  • Method for awakening emergency broadcast by subcarriers, DTMB set top box and system
  • Method for awakening emergency broadcast by subcarriers, DTMB set top box and system
  • Method for awakening emergency broadcast by subcarriers, DTMB set top box and system

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Embodiment Construction

[0074] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0075] Example Figure 1-3 As shown, the method, DTMB set-top box and system for waking up the emergency broadcast by the subcarrier, wherein,

[0076] In one aspect of this embodiment, the method for waking up an emergency broadcast by a subcarrier includes the following steps:

[0077] (1) When the DTMB set-top box 400 is turned off or in standby or playing a program, the FM subcarrier receiving module 1 receives the FM subcarrier broadcast signal, demodulates and decodes the FM subcarrier data, and then decrypts it by the FM subcarrier decryption analysis module 2, Analyze the FM subcarrier data to get emergency messages;

[0078] FM subcarrier broadcasting is one of FM-SCA broadcasting, FM-RDS broadcas...

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Abstract

The invention discloses a method for awakening an emergency broadcast by subcarriers, a DTMB set top box and a system. The method comprises the following steps that: a frequency modulation subcarrier receiving module and a frequency modulation subcarrier decryption analysis module obtain an emergency message from a frequency modulation subcarrier broadcast signal, with the emergency message comprising an emergency instruction and emergency information, and the emergency information being a receiving parameter of an emergency broadcast DTMB program; a DTMB receiving module obtains a DTMB program from a DTMB broadcast television signal; a first control module receives the emergency message, executes the emergency instruction, wakes up the DTMB set top box in advance for a necessary time period, and transmits the emergency message to a main control module which receives program video and audio data; and the main control module sets receiving parameters of the DTMB receiving module according to the emergency information, converts the emergency broadcast content into a media type and then outputs the emergency broadcast content. According to the invention, the emergency message in the frequency modulation subcarrier broadcast signal is detected and received in real time, and the DTMB set top box is awakened to carry out the emergency broadcast.

Description

technical field [0001] The invention belongs to the technical field of emergency broadcasting, and in particular relates to a method for waking up emergency broadcasting by subcarriers, a DTMB set-top box and a system. Background technique [0002] The terrestrial digital TV DTMB set-top box receives, demodulates, demultiplexes and decodes the DTMB broadcast TV signal to obtain broadcast TV program data, and outputs it to the TV for playback. When a natural disaster or social public event occurs, the emergency broadcast management platform sends an emergency message to the DTMB set-top box. When the DTMB set-top box is turned off, standby or playing programs, there is a problem of how to respond to emergency messages and play emergency broadcasts. [0003] The existing emergency broadcast system inserts the emergency message into the DTMB broadcast TV signal, and the DTMB set-top box receives and separates the emergency message. Demodulation and decoding require high-frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/426H04N21/435H04N21/439H04N21/4402H04N21/443H04N21/462H04N21/488H04N21/81H04H20/59H04H20/46
CPCH04H20/46H04H20/59H04N21/42607H04N21/435H04N21/4355H04N21/4398H04N21/440218H04N21/4432H04N21/4436H04N21/4622H04N21/4882H04N21/814
Inventor 张瑞勋
Owner 六安富华智能信息科技有限公司
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