Receiver for receiving both hdtv and ntsc and method for...

H - Electricity – 04 – N

Patent

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Details

H04N 7/01 (2006.01) H04N 5/46 (2006.01) H04N 7/015 (2006.01) H04N 7/44 (2006.01) H04N 5/44 (2006.01)

Patent

CA 2233523

A receiver which receives both HDTV and NTSC signals, and a method for selecting received signals, are provided. According to this method, a broadcasting mode is set from the outside. When the broadcasting mode is an NTSC mode, an NTSC signal is selected. When the broadcasting mode is an HDTV mode, a High-definition (ATV) signal is selected. When the judged broadcasting mode is an automatic mode, it is judged whether an NTSC signal exists in a received signal.If the NTSC signal does not exist in the received signal, said ATV signal is selected. If the NTSC signal exists in the currently-received signal, a channel set from the outside is determined. If the channel is an NTSC channel, the NTSC signal is selected, and if the channel is an HDTV channel, the ATV signal is selected. Therefore, the HDTV and NTSC signals can both be received, and when both NTSC and HDTV signals exist in a channel, one of them can be selectively received.

L'invention porte sur un récepteur pouvant recevoir des signaux TVHD et NTSC et sur une méthode de sélection des signaux reçus. Dans la méthode de l'invention, un mode de diffusion est choisi à l'extérieur. Quand ce mode est un mode NTSC, un signal NTSC est sélectionné. Quand c'est un mode TVHD, un signal à haute définition («ATV») est sélectionné. Quand le mode de diffusion examiné est un mode automatique, le récepteur de l'invention détermine si le signal reçu a une composante NTSC. S'il n'y a pas de composante NTSC dans le signal reçu, le signal ATV est sélectionné. S'il y a une composante NTSC dans le signal reçu, un canal choisi à l'extérieur est identifié. Si ce canal est un canal NTSC, le signal NTSC est sélectionné; si ce canal est un canal TVHD, le signal ATV est sélectionné. Les signaux TVHD et NTSC peuvent donc être reçus tous les deux et, quand un canal contient à la fois un signal NTSC et un signal TVHD, l'un ou l'autre de ces signaux peut être sélectionné.

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