| 摘要 |
A digital broadcasting signal processing set-top box with improved functions is provided to divide a composite signal transmitted through a single channel into an audio signal and a video signal and mix audio signals of two channels. A digital broadcasting signal processing set-top box(1) includes a first tuner(101) for receiving a first channel among a plurality of broadcasting channels, a second tuner(102) for receiving a second channel, a data processor(200) for processing broadcasting signals received through the first tuner and the second tuner, an RF(Radio Frequency) signal receiver(700) for receiving an RF signal from a user, and a controller(300) for generating a control signal in response to the RF signal. The set-top box further includes a video decoder(400) for decoding a video signal transmitted from the data processor, a first audio decoder(501) for decoding an audio signal of the first channel, a second audio decoder(502) for decoding an audio signal of the second channel, a first multiplier(601) for multiplying the audio signal from the first audio decoder by a multiple value from the controller, and a second multiplier(602) for multiplying the audio signal from the second audio decoder by the multiple value from the controller.
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