Channel scanning device in satellite television system and channel scanning method

Abstract

The invention provides a channel scanning device in a satellite television system. The channel scanning device comprises a frequency spectrum generating circuit, a memory and an artificial neural network; the frequency spectrum generation circuit is used for receiving a television signal and carrying out frequency spectrum analysis on the television signal to generate a frequency spectrum. The memory is used for storing a group of operation parameters generated in advance according to a plurality of spectrum samples. The artificial neural network comprises a plurality of neuron circuits and isused for performing a neural network operation on the frequency spectrum of the television signal according to the group of operation parameters so as to generate a channel scanning result. Tthe group of operation parameters comprises an offset and one or more weights adopted by each neuron circuit in the plurality of neuron circuits when the neural network operation is carried out.

Description

technical field [0001] The present invention is related to satellite television, and in particular to the channel scanning technology at the user side in the satellite television system. Background technique [0002] With the advancement of communication technology, the development of digital TV broadcasting is becoming more and more mature. In addition to base stations and cable lines, digital TV signals can also be transmitted via satellites. figure 1 A functional block diagram of a satellite TV signal receiver is presented. The TV signal received by the dish antenna 110 will first be sent to the front-end circuit 120 for preliminary demodulation, low-noise frequency reduction and other processing procedures, and then transmitted to the TV signal receiving device 140 through the cable 130 (probably in conjunction with the TV equipment working set-top box, or possibly the TV device itself). [0003] According to the current technical specifications, the center frequency ...

AI Technical Summary

Problems solved by technology

Compare Figure 3A and Figure 3B It can be seen that the problem of spectral distortion will greatly increase the difficulty of channel scanning

More specifically, after finding out the energy is higher than the preset threshold value E TH After the frequency segment, the channel determination circuit 230 cannot directly determine the left and right boundaries of the segment where the TV channel is located.

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