Method and video apparatus for auto-compensating weak signals
A video apparatus and method for auto-compensating weak signals are disclosed. The video apparatus includes a tuner, video decoder and controller. The turner receives an analog signal and accordingly outputs a video signal, and generates a gain control signal according to intensity of the analog signal. The video decoder decodes the video signal to be a digital signal. The controller receives the digital signal and gain control signal and outputs an image according to the digital signal. When the controller determines that the analog signal is a weak signal according to the gain control signal, a noise reduction function of the video decoder is actuated to generate the digital signal. The controller displays a message on a monitor according to the gain control signal, which represents intensity of the analog signal, for the user as a basis of troubleshooting.
1 . A video apparatus for auto-compensating weak signals, comprising:
a turner, for receiving an analog signal and accordingly outputting a video signal, and generating a gain control signal according to intensity of the analog signal;
a controller, for receiving the gain control signal to determine the intensity of the analog signal, and generating a control signal; and
a video decoder, for receiving the video signal and the control signal, and decoding the video signal to be a digital signal.
2 . The apparatus according to claim 1 , wherein when the controller determines that the analog signal is a weak signal, the controller outputs the control signal for actuating a noise reduction function of the video decoder to generate the digital signal.
3 . The apparatus according to claim 2 , wherein the controller comprises a scaler for adjusting resolution of the digital signal.
4 . The apparatus according to claim 1 , further comprising a monitor for displaying an image according to the digital signal.
5 . The apparatus according to claim 4 , wherein the controller displays a message on the monitor according to the gain control signal and the message represents the intensity of the analog signal.
6 . The apparatus according to claim 5 , wherein the message is provided to a user for a basis of troubleshooting.
7 . A method for auto-compensating weak signals, applied to a video apparatus comprising a turner, a video decoder and a controller, the method comprising:
(a) receiving an analog signal and outputting a video signal and a gain control signal represents intensity of the analog signal by the tuner;
(b) receiving the gain control signal and accordingly determining the intensity of the analog signal, and generating a control signal by the controller; and
(c) decoding the video signal and receiving the control signal to accordingly generate a digital signal by the video decoder.
8 . The method according to claim 7 , wherein the video apparatus comprises a monitor, and the method further comprises:
displaying a message on the monitor according to the gain control signal, wherein the message represents the intensity of the analog signal.
9 . The method according to claim 7 , wherein the controller determines if a noise reduction function of the video decoder is actuated to generate the digital signal.