Arrangement for generating a 3D video signal
View Patent ↗The invention relates to an arrangement for generating a 3D video signal, which produces a 3D effect when it is displayed on a screen, from an input video signal that is made up of frames, each of which has an odd field and an even field, where in order to generate the 3D video signal alternately an even field n and an odd field n−1 (or vice versa) and subsequently alternately an even field n+1 and an odd field n (or vice versa) are displayed, where in order to generate the 3D video signal a scan converter ( 4, 5 ) is used which can display two signals in the split screen mode, one of which is delayed by means of a special function memory ( 4 ) in the scan converter, where the non-delayed signal and the delayed signal are written, horizontally compressed by a factor of two, into a conversion memory ( 6 ) and, for the purposes of displaying on a screen, when they are read are scaled up by a factor of two in the horizontal direction.
1. An arrangement for generating a 3D video signal, which produces a 3D effect when it is displayed on a screen, from an input video signal that is made up of frames, each of which has an odd field and an even field, where in order to generate the 3D video signal a sequence of an odd field and an even field, each of which originate from a different one of two successive frames, and subsequently a sequence of a subsequent odd field and a subsequent even field, each of which originate from a different one of a next successive frame and a frame preceding the next successive frame, are provided in the 3D video signal, where in order to generate the 3D video signal a scan converter is used which can display two signals in a split screen mode, one of which is delayed by means of a special function memory in the scan converter, where the non-delayed signal and the delayed signal are written, horizontally compressed by a factor of two, into a conversion memory and, for the purposes of displaying on a screen, when they are read are scaled up by a factor of two in the horizontal direction and shifted horizontally such that they are displayed in the correct convergence.
2. An arrangement as claimed in claim 1 , characterized in that the arrangement has on the input side two digital multistandard color decoders, of which one supplies the odd (or even) fields to the special function memory and one supplies the even (or odd) fields to the conversion memory in a form that has already horizontally been scaled down by a factor of two, in that the fields are read from the special function memory, scaled down by a factor of two in the horizontal direction and written into the conversion memory.
3. An arrangement as claimed in claim 1 , characterized in that the arrangement has on the input side two digital multistandard color decoders, of which one supplies the odd (or even) fields to the special function memory in a form that has already horizontally been scaled down by a factor of two and one supplies the even (or odd) fields to the conversion memory in a form that has already horizontally been scaled down by a factor of two, in that the fields are read from the special function memory and written into the conversion memory.
4. An arrangement as claimed in claim 1 , characterized in that the input video signal has a field frequency of 50 Hertz and in that the arrangement supplies on the output side the 3D video signal having a field frequency of 100 Hertz, where the displaying takes place according to the scheme field n, field n−1, field n, field n−1, field n+1, field n, field n+1, field n and so on.