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Digital video broadcasting - terrestrial (dvb-t) system and modulation method thereof

一种地面数字、广播系统的技术，应用在广播传输系统、广播监控/测试/故障检修的装置、电气元件等方向，能够解决停顿、接收端显示异常、困难度等问题

Inactive Publication Date: 2016-03-02
ATEN INT CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the transmission process, the signal may be affected by factors such as distance, noise, or wires, which may cause abnormal display at the receiving end, such as broken images, pauses, or no display, etc.
[0003] Of course, this situation can be improved through manual adjustment, but manual adjustment may also encounter some problems, for example: the distance between the transmitting end and the receiving end may be very far, and manual adjustment will be difficult; The effect of aging caused by the long-term use of the wire is usually discovered when the display is abnormal at the transmission end

Method used

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  • Digital video broadcasting - terrestrial (dvb-t) system and modulation method thereof
  • Digital video broadcasting - terrestrial (dvb-t) system and modulation method thereof
  • Digital video broadcasting - terrestrial (dvb-t) system and modulation method thereof

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Embodiment Construction

[0042] The following description will disclose various embodiments of the present invention with drawings and text descriptions. For the sake of clarity, many practical details will be described together in the following descriptions. It should be understood, however, that these practical details should not be used to limit the invention. In addition, for the purpose of simplifying the drawings, some conventional structures and elements are drawn in a simplified and schematic manner in the drawings.

[0043] like figure 1 As shown, the terrestrial digital video broadcasting system 1 provided by this embodiment preferably includes a transmission module 2, a receiving module 3, and a transmission line 4 coupled to each other, wherein the number of the transmission module and the receiving module can be one-to-one, one-to-one Many or many-to-many, here is an example of one-to-one description. In this embodiment, the transmission line 4 is a coaxial cable, but not limited theret...

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Abstract

The present invention provides a digital video broadcasting - terrestrial (DVB-T) system and modulation method thereof. The system comprises a transmission module and a receiving module. The transmission module modulates a video signal to a DVB-T signal. The receiving module receives the DVB-T signal via a transmission line and demodulates the DVB-T signal to the video signal, and at the same time, monitoring the signal-to-noise ratio (SNR) or bit error rate (BER), and quantizes them to a reference data. The receiving module transmits the reference data to the transmission module through the same transmission line. The system can determine a control parameter according to the reference data to set the modulation parameter of the DVB-T signal.

Description

technical field [0001] The present invention relates to a terrestrial digital video broadcasting system and its modulation method, in particular, it has the function of automatically adjusting modulation and picture size. Background technique [0002] Traditionally, when using Digital Video Broadcasting of Terrestrial (DVB-T) related technologies for audio and video data transmission, the modulation mode of the transmitting end is usually set to a fixed setting, that is, the transmitting end first completes the setting before transmitting the signal to the receiving end. For example, after the TV station completes the setting of the relevant parameters, the signal is transmitted to the user terminal. However, the signal may be affected by factors such as distance, noise or wire during the transmission process, and the receiving end may display abnormal situations, such as broken images, pauses or no display, etc. [0003] Of course, this situation can be improved by manual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2385H04N21/438H04N21/426H04N21/442
CPCH04H20/12H04H20/76H04N21/2383H04N21/42615H04N21/4263H04N21/43632H04N21/4382H04N21/440263H04N21/44209H04N21/6112H04N21/64738
Inventor 高国峰
Owner ATEN INT CO
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