Tuner-based television white frequency spectrum detection method

A detection method and white spectrum technology, applied in TV, electrical components, image communication, etc., can solve problems such as failure to realize automatic fault repair, poor user experience, high failure rate, etc., to save time for locking frequency points, fairness Efficient coexistence and the effect of reducing the failure rate

Inactive Publication Date: 2017-06-06
成都米风通信技术有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, the spectrum noise detection method whose application number is CN200910262551.4 has a high failure rate, and cannot automatically repair the failure when the Tuner state is abnormal, and the user experience is not very good

Method used

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  • Tuner-based television white frequency spectrum detection method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific embodiment:

[0028] Detection system initialization;

[0029] Get the working status of Tuner;

[0030] Send the obtained Tuner working status to the central processing unit;

[0031] Receive the working status of the tuner, and send a channel change command to the first channel;

[0032] Use the Tuner to lock the frequency of the first channel;

[0033] After the frequency point of the first channel is locked, judge whether the working state of the Tuner is normal. If it is normal, demodulate the code stream on the frequency point of the first channel, and then control the player to play the video through the remote control; if the working state of the Tuner If not normal, go to the next step;

[0034] Record the frequency point where the Tuner's working state is abnormal, and generate error characteristic parameters according to the value of each register obtained at the frequency ...

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Abstract

The invention discloses a tuner-based television white frequency spectrum detection method. The method includes the following steps: detecting system initialization, obtaining the working state of a Tuner, sending the obtained working state of the Tuner to a central processor, etc. Multiple terminals can effectively use blank frequency spectrums, can coexist in a fair and highly efficient manner, and will do not interfere with each other. The frequency point locking time is saved during channel switching, the channel switching speed is increased through television white frequency spectrum detection, a failure rate during channel switching is reduced, faults can be automatically fixed once the state of the Tuner is abnormal, and thus the user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication. In particular, it relates to a tuner-based TV white spectrum detection method. Background technique [0002] The spectrum range of TV signals is 40-870Mhz. In order to facilitate the design of high-frequency receiving circuits, TV RF signals are considered to be divided into 3 frequency bands: VHF-L, VHF-H and VHF. Therefore, the tuner generally has 3 bandpass filters, corresponding to the three signal frequency bands. Regardless of digital or analog TV, it must be processed by RF signal input, high amplifier, frequency mixing, intermediate amplifier, band pass, notch wave, etc. until the intermediate frequency signal is output. The channels in the whole room are exactly the same. A SAW filter and amplification is carried out. Of course, some tuners have already embedded the demodulation part and output the TS stream directly. The output of the tuner here is the IF signal. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/04
CPCH04N17/04
Inventor 余仪琳张德鑫徐镜媛
Owner 成都米风通信技术有限公司
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