Set top box

Abstract

A set top box is used for processing sounds and comprises a sound analyzing module, an analog-to-digital conversion module, a central processing unit, an accompaniment processing module and a digital sound mixer, wherein the sound analyzing module is used for receiving a singing sound signal and converting the received singing sound signal from a single-tone signal to a stereo signal so as to output the stereo singing sound signal; the analog-to-digital conversion module is used for converting the stereo singing sound signal into a digital singing sound signal; the central processing unit is used for outputting a first accompaniment signal; the accompaniment processing module is used for adjusting the first accompaniment signal output by the central processing unit so as to output a second accompaniment signal; the digital sound mixer is used for mixing the second accompaniment signal and the digital singing sound signal so as to output the man-machine mixing sound to the central processing unit; and the central processing unit is also used for converting the man-machine mixing sound into the digital stereo and outputting the digital stereo. The set top box reduces the processing stage number after sound digitization, thus shortening the delay time of the sound.

Description

technical field [0001] The invention relates to audio processing, in particular to a set-top box. Background technique [0002] With the advent of the digital age, the function of digitizing sound is becoming more and more popular. At present, the functions of the set-top box (Set TopBox) are becoming more and more abundant, and the karaoke function of the set-top box is one of the more popular functions at present. However, in the existing sound digitization technology in the set-top box, either the original design cannot realize the digital output of the sound, or even if the sound can be digitally output, the digitized sound has to undergo multi-stage processing, including digital-to-analog conversion and analog-to-digital conversion. As a result, the delayed signal of the sound and the quality of the sound are distorted, resulting in an obvious out-of-sync phenomenon between the image and the sound. Contents of the invention [0003] In view of this, it is necessary ...

AI Technical Summary

Problems solved by technology

However, in the existing sound digitization technology in the set-top box, either the original design cannot realize the digital output of the sound, or even if the sound can be digitally output, the digitized sound has to undergo multi-stage processing, including digital-to-analog conversion and analog-to-digital conversion. As a result, the delayed signal of the sound and the quality of the sound are distorted, resulting in the phenomenon that the image and sound are out of sync.

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