Subway digital audio-video broadcasting method and system based compressed sensing

A compressed sensing, audio and video technology, applied in broadcasting system control, specific broadcasting applications, electrical components, etc., can solve problems such as susceptible to interference, interactive performance, and high noise in communication signals, and achieve the effect of improving real-time performance and reducing data volume

Inactive Publication Date: 2017-08-18
CENT SOUTH UNIV
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AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a subway digital audio and video broadcasting method and system based on compressed sensing, the purpose of which is to overcome the problems in the prior art that the communication signal in the subway car is noisy, susceptible to interference and poor interactive performance

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  • Subway digital audio-video broadcasting method and system based compressed sensing
  • Subway digital audio-video broadcasting method and system based compressed sensing
  • Subway digital audio-video broadcasting method and system based compressed sensing

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Such as figure 1 As shown, a subway digital audio and video broadcasting system based on compressed sensing consists of a train display and broadcast control unit, a passenger broadcast communication unit, a driver voice control unit, a passenger emergency communication unit, and a passenger room noise sensor, a train speaker, a microphone, and a radio Equipment, composed of LED display.

[0045] The train display and broadcast control unit is used to process the driver's control instructions and audio and video signals, including speakers, display modules and intercoms;

[0046] The passenger broadcast communication unit is used to communicate with the train display and broadcast control unit, broadcast audio signals and display video ...

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Abstract

The invention discloses a subway digital audio-video broadcasting method and system based on compressed sensing. The method adopts the ARM Cortex-M digital broadcasting technology based on the compressed sensing real-time security algorithm of a RS485 bus, and has the functions of realizing intercom in a cab, broadcasting to passengers by a driver, realizing conversation between the driver and the passengers, communicating with an over-ground control center by the driver, digitally broadcasting stops / alarming for close the door and like. The whole system adopts the full-digital processing technology and adopts the real-time security algorithm based on the compressed sensing technology; the original audio-video data is compressed by use of the compressed sensing technology, the data size is reduced, and a frame information table is established for media data frames; by use of the dynamic and static combined RS485 bus scheduling algorithm, the data and instructions with high real-time can be sufficiently considered so as to be preferentially transmitted, and the channel can be sufficiently utilized; and the real-time property of the system communication is greatly improved.

Description

technical field [0001] The invention belongs to the field of subway train broadcasting systems, and in particular relates to a subway digital audio and video broadcasting method and system based on compressed sensing. Background technique [0002] On modern rail vehicles such as subways, light rails, and trains, it is necessary to install professional broadcasting systems that can realize on-site command, background music, business broadcasting and emergency alarms, especially modern broadcasting systems that can transmit audio and video information. [0003] Since the compartment environment is relatively closed and too many cables cannot be installed, and the train is in motion for a long time, it is necessary to realize intercom in the driver's cab, broadcasting from the driver to the passenger compartment, dialogue between the driver and passengers, the driver and the control center not in the compartment, and digital station announcement Communication functions such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H20/62H04H60/09H04N21/214H04N21/414
Inventor 刘伟荣张晓勇蒋富黄志武李烁彭军杨迎泽高凯于文涛
Owner CENT SOUTH UNIV
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