A dual screen displaying device for displaying two NTSC video signals on the left and right sides of a monitor is disclosed. The displaying device comprises two tuners for receiving wireless signals from an antenna and generating two video signals V1 and V2, two digitizing circuits for digitizing the video signals V1 and V2, a control circuit for merging the outputs of the two digitizing circuits, a digital-to-analog converter for converting the merged digitized signals back to a combined video signal, and a display control circuit for displaying the combined video signal. Asynchronous condition may happen when displaying different fields of the two video signals V1 and V2 in the same time. And the control circuit uses a storage method which controls the storage of a specific field of the video signal V2 or a data retrieval method which controls the retrieval of a specific field of the video signal V2 to solve the asynchronous problem.
A display system able to display a television screen and a navigation screen, giving due consideration to safe vehicle operation, provided with a screen switching unit for displaying a television screen instead of a navigation screen at least at part of a display screen during display of the navigation screen, a switching instructing unit for instructing switching to the screen switching unit when detecting that a predetermined event has occurred, or a screen area setting unit for setting a specific area in the screen for display by switching by the screen switching unit instead of the switching instructing unit.
A video signal processing apparatus comprises a sub-screen processing integrated circuit for subjecting a sub-screen video signal to scale-down processing to reduce its display region and output the sub-screen video signal, and a main-screen processing integrated circuit comprising: a switching circuit for receiving a main-screen video signal and the scaled-down sub-screen video signal which is outputted from the sub-screen processing integrated circuit, and selecting the main-screen video signal for a main-screen display region while selecting the sub-screen video signal for a sub-screen display region; an A/D conversion circuit for converting the video signal outputted from the switching circuit into a digital video signal; a digital signal processing circuit for digitally processing the digital video signal outputted from the A/D conversion circuit; and a D/A conversion circuit for converting the digitally-processed video signal into an analog video signal. Therefore, the main-screen video signal and the sub-screen video signal can be combined so that these signals are displayed on a single screen, and the circuit scale of the video signal processing apparatus can be minimized.
A device and method for processing a sub-picture in a TV receiver is disclosed. The present invention allows a viewer to freely move the position of a sub-picture in both left⇄right and top⇄bottom directions, such that even a portion of the sub-picture may be displayed on the screen.
A display system and a method for supplying a display system with a picture signal are described, in which the picture signal is fed in dependence on a system clock pulse of the display system, whereby an improvement in the picture quality is achieved. A particularly good picture quality is achieved if a change of the picture signal for one picture pixel to the picture signal for the following picture pixel is chosen to be temporally shifted relative to the sampling instant at which the display system samples the picture signal.
A system is provided for managing and accessing media content received via a plurality of display channels and stored in a plurality of buffers in a storage device. The system associates the plurality of buffers with a composite buffer file.
