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DRM (digital radio mondiale) digital amplitude modulation broadcast receiver

A technology for digital AM broadcasting and broadcasting reception, applied in broadcasting receiving circuits, broadcasting-specific applications, etc., can solve problems such as the inability to realize emergency broadcasting transmission and the inability to intercept emergency broadcasting signals in the first place, and achieve low-cost telemedicine and sound quality Improvement and ease of use

Inactive Publication Date: 2016-08-17
镇江乾坤电子科技有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When major natural disasters, emergencies, public health and social security and other sudden public crises occur, emergency broadcasting can provide a fast and efficient information transmission channel to transmit disaster news or possible harm caused by disasters to the hands of the public. The broadcast has a special AM signal different from the general broadcast, and the current broadcast receiver cannot intercept the emergency broadcast signal at the first time, so that the emergency broadcast transmission cannot be realized, and the loss of life and property can be minimized

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  • DRM (digital radio mondiale) digital amplitude modulation broadcast receiver
  • DRM (digital radio mondiale) digital amplitude modulation broadcast receiver
  • DRM (digital radio mondiale) digital amplitude modulation broadcast receiver

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Embodiment Construction

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] A DRM digital AM broadcasting receiver, comprising a casing 1, a membrane key sheet 2 is arranged on the top of the casing 1, the casing 1 comprises a front casing 3 and a rear casing 4, the surface of the front casing 4 There are a sound window 5, a display window 6, a volume adjustment knob 7 and a status display lamp 8. There are two sound windows 5, which are respectively located on both sides of the display window 6, and a headphone hole is provided on one side of the front housing 4 9. S / PDIF digital audio interface 10, power switch 11, charging indicator light 12 and charging hole 13. The power switch 11, charging indicator light 12 and charging hole 13 are connected to the power supply unit 22, and the other side is provided with an external frequency modulation Antenna socket 14, the top of the front housing 3 is provided with a...

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Abstract

The invention relates to a DRM (digital radio mondiale) digital amplitude modulation broadcast receiver. The DRM digital amplitude modulation broadcast receiver comprises a casing, wherein a broadcast receiving circuit, a power supply unit and an output unit are arranged in the casing; the broadcast receiving circuit comprises a tuner, a priority module, a low-pass filter, an A / D converter, an OFDM (orthogonal frequency division multiplexing) modulator, a synchronous demodulator, a channel estimation module, a channel equalization module, a channel decoder, a demultiplexer, an audio decoder and a data decoder. The DRM digital amplitude modulation broadcast receiver can be taken as a digital receiving end of a digital AM transmitting system, low-cost tele-medicine and distance education, is particularly applied to receiving of digital AM emergency broadcast, and provides a sole low-cost radio digital audio and teletext broadcast for wide-range relief work.

Description

Technical field [0001] The invention relates to a DRM digital AM broadcasting receiver, which belongs to the field of digital radio broadcasting. Background technique [0002] The existing analog AM broadcast radio can only receive audio signals, and the sound effect is very poor. It has inherent defects such as poor transmission quality, single service and easy interference. Therefore, the number of broadcast listeners is low. With digital TV, digital satellite broadcasting, and multimedia broadcasting With the emergence of new transmission methods such as the Internet, AM broadcasting is facing more and more severe challenges, and its situation is becoming increasingly difficult. [0003] DRM is a broadcasting technology. It is the only universal non-patented digital radio broadcasting system for shortwave, medium wave and longwave digital sound broadcasting frequency bands. DRM can effectively use the existing amplitude modulation (AM) broadcasting frequency band (below 30 MHz)....

Claims

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Application Information

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IPC IPC(8): H04H40/18H04H20/59
CPCH04H20/59H04H40/18
Inventor 安基特.阿格拉沃尔
Owner 镇江乾坤电子科技有限公司
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