Video processing device
AssigneeHitachi, Ltd.
InventorsKazuhiko Yoshizawa, Nobuaki Kabuto, Atsushi Yoshioka
Life of this patent
Estimating the term…
Abstract
A video processing device includes a control circuit for detecting a physical quantity related to a size of noise contained in the input video signal, and an OSD (On Screen Display) circuit for providing a user with a warning screen when the physical quantity detected by the control circuit is larger than a prescribed value, obtaining an appropriate video signal even when a digital video signal has poor quality.
Claims11
1-18. (canceled)
Video and audio processing apparatus for outputting one of a first audio signal superposed on a video signal and a second audio signal received separately from the first audio signal, for performing predetermined processes for the video signal, the first audio signal and the second audio signal, comprising:
- a switch for selecting one of the first audio signal and the second audio signal;
- and
- a control circuit for controlling the switch, and a display portion to display information or an OSD circuit,
- wherein the control circuit controls the switch to select the second audio signal, and controls the display portion or the OSD circuit to display information relative to the selection of the first and second audio signals, when the first audio signal is not superposed on the video signal.
Television receiver for receiving a first audio signal superposed on a video signal and a second audio signal to display a screen image obtained from the video signal on a display device and outputting one of the first audio signal and the second audio signal from a speaker, comprising:
- a switch for selecting one of the first audio signal and the second audio signal as an audio signal output from the speaker;
- a display portion for displaying information;
- and
- a control circuit for controlling the switch and the display portion,
- wherein the control circuit controls the switch to select the second audio signal and controls the display portion to display information relative to the selection of the second audio signal, in a case where the first audio signal is not superposed on the video signal or is a silent signal.
Television receiver for receiving a video signal,
- a digital audio signal received with the video signal and an analog audio signal, displaying a screen image obtained from the video signal on a display device and outputting, from a speaker, an audio signal obtained from the digital audio signal or the analog audio signal, comprising:
- a switch for selecting one of the digital audio signal and the analog audio signal as an audio signal output from the speaker;
- and
- a control circuit for controlling the switch and the display device,
- wherein the control circuit controls the switch to select the digital audio signal in a case where an error rate of the digital audio signal is smaller than a predetermined threshold value and select the analog audio signal in a case where the error rate of the digital audio signal is larger than the predetermined threshold value, and controls the display device to display information relative to the selection in response to the selection for the digital and analog audio signals.
Dependencies are inferred from the claim text.