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Generating a multi-window video signal

A signal and image signal technology, applied in the field of circuits, can solve problems such as high-priced circuits

Inactive Publication Date: 2005-04-06
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of these known circuits is that the color decoding means comprise a color decoder for each input image signal
Since the color decoder is a rather expensive component, this will result in an expensive circuit

Method used

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  • Generating a multi-window video signal
  • Generating a multi-window video signal
  • Generating a multi-window video signal

Examples

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Embodiment Construction

[0014] figure 1 A circuit 2 is schematically shown, which receives two input image signals 4.1 and 4.2 and generates a composite output image signal 6 . Circuit 2 is in this example part of a television, wherein the input image signals 4.1 and 4.2 are digital signals received from a tuner of the television equipment, wherein each input image signal comprises an encoded sequence of images. The input image signals 4.1 and 4.2 are in this example composite video baseband signals (CVBS signals). The composite output image signal 6 is in this example an image signal comprising a picture-in-picture (PIP) signal. Alternatively, the composite output image signal 6 is a dual window signal in which the two input signals are displayed side by side. The composite output image signal is displayed on a display device D having a display screen 34 .

[0015] The circuit comprises a color decoding unit 8 for decoding the two input image signals 4.1 and 4.2 and a composition unit 10 for gene...

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PUM

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Abstract

The invention relates to a circuit (2) for generating a composite output picture signal (6) such as a picture signal comprising a PIP (Picture-in-Picture) signal or a DW (Double window) signal on the basis of at least two input picture signals (4.1, 4.2), the circuit comprising a color decoding unit (8) for decoding the at least two input picture signals (4.1, 4.2), and a composing unit for generating the composite output picture signal (6) on the basis of the decoded at least two input picture signals. According to the invention, the color decoding unit (8) comprise a combining unit (14) for combining the at least two input picture signals (4.1, 4.2) into one combined picture signal (16), and one color decoder (18) for decoding the combined picture signal (16) to obtain a single decoded picture signal (12), the composing unit (10) being arranged to generate the composite output picture signal (6) on the basis of the single decoded combined picture signal (12). The invention also relates to a television apparatus provided with a circuit (2) according to the invention, and a display device (D) for displaying the output composite picture signal (6). Furthermore, the invention relates to a video tape recorder provided with a circuit according to the invention.

Description

technical field [0001] The invention relates to a circuit for generating a composite output image signal, such as an image signal comprising a PIP (Picture in Picture) signal or a DW (Dual Window) signal, from at least two input image signals, said circuit comprising Color decoding means for decoding at least two input image signals and comprising means for generating an output image signal from the decoded at least two input image signals. The invention also relates to a television device equipped with a circuit according to the invention. Furthermore, the invention relates to a video recorder equipped with a circuit according to the invention. Background technique [0002] Circuits for generating a composite output image signal are known and are used, for example, in television equipment and video recorders. A disadvantage of these known circuits is that the color decoding means comprise a color decoder for each input image signal. This would result in an expensive circ...

Claims

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Application Information

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IPC IPC(8): H04N5/45H04N5/91H04N9/64H04N9/74
CPCH04N9/64H04N5/45H04N21/4316H04N21/431
Inventor E·德梅尔斯曼
Owner KONINKLIJKE PHILIPS ELECTRONICS NV