Set-top box for controlling and processing multiple television signals and implementation method thereof

Abstract

The invention provides a set-top box for controlling and processing multiple television signals. A selection signal output module and a radio frequency signal modulation module are arranged in a high frequency head; and a decoding master chip is equipped with a selection signal port and a channel selection port. The invention further provides a method for controlling and processing multiple television signals by the set-top box. The method comprises the following steps: (1) television signals are input into a matching circuit by a low-noise amplifier and divided into two paths, one of which are high frequency analog signals and directly sent to the selection signal output module with other signals, the other one of which are high frequency digital signals and processed and finally converted into the high frequency analog signals to be sent to the selection signal output module; and (2) the decoding master chip outputs control information, and the selection signal output module selects the signals to output to an external television. The set-top box and the method help that the television can receive programs of digital signals and analog signals without decoding the analog television signals in the cable television. The set-top box has the advantages of low power consumption, simple structure and good applicability.

Description

technical field [0001] The invention relates to the cable TV set-top box technology, in particular to a set-top box capable of controlling and processing various television signals and a realization method thereof. Background technique [0002] At present, there are mainly three kinds of set-top boxes used by TV users to watch digital TV. The first set-top box is as follows: figure 1 As shown, the set-top box is composed of a tuner, a band-pass filter (band-pass network), a decoding main chip, a video conversion circuit and an audio conversion circuit. The tuner has a low-noise amplifier input matching circuit and a digital down-conversion circuit; The high-frequency head is connected to the decoding main chip through the data bus I2C, the digital down-frequency circuit in the high-frequency head is connected to the decoding main chip through a band-pass filter, and the decoding main chip is connected to the external TV audio signal through the audio conversion circuit. The...

AI Technical Summary

Problems solved by technology

It can be seen that the decoding main chip in the existing set-top box not only decodes the digital signal in the cable TV, but also needs to decode the analog signal and other signals in the cable TV. The processing process is complicated and the power consumption is relatively large. , and the performance of the analog signal in the original cable TV signal is not ideal after processing

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