Multi-broadcast selection apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorIl-koo Nah
Life of this patent
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Abstract
A channel selection apparatus is provided for allowing receipt of signals broadcast according to the NTSC, SECAM and PAL broadcast modes. A controller discriminates the signal's broadcast mode based on the horizontal sync signal included in the received signal and alters a circuit connection path. Accordingly, a desired broadcast mode can be automatically selected without requiring any particular switch manipulation by a user. Further, a video signal processing path is separated from a sound signal processing path, in order to obtain excellent sound quality, even when receiving a stereo broadcast. Also, it is possible to easily automate the manufacturing process for the apparatus, thereby improving productivity.
Claims23
A multi-broadcast channel selection apparatus having a tuner for receiving a modulated signal broadcast according to a plurality of broadcast modes from a transmitter and converting the received modulated signal into an intermediate frequency (IF) signal having video and sound portions, wherein the video portion includes a sync signal, the multi-broadcast channel selection apparatus comprising:
- a video signal processing circuit, coupled to an output of said tuner, for demodulating the video portion of the IF signal, and outputting a video signal adapted for each of the plurality of broadcast modes;
- a sound signal processing circuit, coupled to said output of said tuner separately from said video signal processing circuit, for demodulating the sound portion of the IF signal, and outputting a sound signal adapted for each of the plurality of broadcast modes;
- a sync signal detector, coupled to an output of said video signal processing circuit, for detecting the sync signal among of the video portion of the IF signal;
- and
- a controller, coupled to an output of said sync signal detector, for receiving the sync signal, determining the broadcast mode of the video signal output from said video signal processing circuit, and outputting a control signal to said video and sound signal processing circuits according to the determined result, wherein said video and sound signal processing circuits demodulate the IF signal based on the broadcast mode of the received modulated signal.
Dependencies are inferred from the claim text.