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

An emergency broadcasting and sub-carrier technology, which is applied in broadcasting circuit devices, broadcasting specific applications, advanced technologies, etc., to achieve the effects of low power consumption, avoiding misoperation, and high power consumption

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 rely on sub-carrier to respond to emergency broadcast, aim to solve the problem of how DTMB set-top box responds to emergency message and plays emergency broadcast

Method used

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

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Embodiment Construction

[0075] 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.

[0076] Example Figure 1-3 As shown, the method, DTMB set-top box and system for responding to emergency broadcast by subcarrier, wherein,

[0077] In one aspect of this embodiment, a method for responding to an emergency broadcast by subcarriers is provided, including the following steps:

[0078] (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;

[0079] FM subcarrier broadcasting is one of FM-SCA broadcasting, FM-R...

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Abstract

The invention discloses a method for responding to an emergency broadcast through 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, the emergency message comprises an emergency instruction and emergency information, and the emergency information is a receiving parameter of an emergency broadcast DTMB program; a DTMB receiving module obtains a DTMB program from a DTMB broadcast television signal; a main control module for receiving the DTMB program video and audio data receives the emergency message, executes the emergency instruction, and awakens the DTMB set top box in a necessary time period in advance; 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 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 responding to 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-f...

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
CPCH04H20/46H04H20/59H04N21/42607H04N21/435H04N21/4355H04N21/4398H04N21/440218H04N21/4432H04N21/4436H04N21/4622H04N21/4882H04N21/814Y02D30/70
Inventor 张瑞勋
Owner 六安富华智能信息科技有限公司
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