| 摘要 |
The invention relates to a scanning-signal generation circuit for creating a frame of juxtaposed parallel lines making it possible to view an image in perspective from a video signal (V), on a screen. This circuit essentially comprises a "lines" scanning ramp generator (1), an "images" scanning ramp generator (2) and a shaper circuit (5) receiving, at its inputs, the two signals (BL, BI) output from the said ramp generators and delivering two signals (CL, CI) each of which results from a linear combination of the two input signals (BL, BI), this combination depending on a variable parameter (x), the setting of which makes it possible to cause the screen to display the frame seen in perspective from a variable angle by rotation about a virtual axis seeming to be perpendicular to the apparent plane of the frame. <IMAGE>
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