Set-top box radio frequency rf modulation processing method and device

Abstract

The invention discloses a set top box radio frequency RF modulation processing method and device. The set top box RF modulation processing method comprises the following steps: setting a RF output channel of the set top box, wherein the RF output channel is reduced through a low-frequency channel; performing RF modulation on the set top box receiving signal, and then outputting to a TV through the RF output channel. By use of the RF modulation processing method disclosed by the invention, the frequency multiplication interference on the set top box output signal can be avoided, thereby improving the output quality of the signal, and guaranteeing the good output effect of an audio-video program at the TV side.

Description

technical field [0001] The present invention relates to the field of television technology, in particular to a set-top box RF (Radio Frequency, radio frequency) modulation processing method and device. Background technique [0002] Although we have entered the era of digital video, and the audio and video quality of RF modulator output is poor, but due to historical reasons, RF modulated analog TV is still reserved for international standards and security monitoring applications. There are still many family TVs that only have analog signal input. In order to reduce costs, hotels or large collective apartments can also use RF modulators to convert digital signals into analog signals and input them to each TV. How to meet the normal input of audio and video to the TV without affecting the normal receiving and playing functions of the set-top box is an important technology at the set-top box end. Although there are many technologies that can modulate the digital signal through ...

AI Technical Summary

Problems solved by technology

How to meet the normal input of audio and video to the TV without affecting the normal receiving and playing functions of the set-top box is an important technology at the set-top box end. Although there are many technologies that can modulate the digital signal through the RF module and output it to the TV, due to the RF module. The influence of the set-top box tuning module (Tuner) causes the set-top box to be interfered in frequency locking, program search and program playback, etc., making the set-top box itself unable to work well; in addition, the RF module will also affect the signal reception of the TV

[0003] In the existing technology, the set-top box and the TV are generally directly connected through a signal line. After setting a channel on the set-top box, the channel is automatically or manually searched on the TV. When the frequency set by the corresponding set-top box is found, the frequency will be saved. After the search is over, the program will be played automatically. The frequency points found may have snowflakes or noise output, and multiple frequency points with the same source may be found and the signal is not good, etc.

Therefore, the prior art cannot solve signal interference very well; and when a frequency point is set at the set-top box end, there is still an influence on the signal of the set-top box itself, causing the set-top box to not output audio and video normally.

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