Image signal conversion device
First Claim
1. An image signal conversion device for handling an interlaced image signal, whereby one frame picture plane is formed by multiplexing, in a time sharing manner, a plurality of field image signals corresponding to a plurality of field picture planes consisting of horizontal scanning lines located in different positions from each other on a picture plane, said device being arranged to form a high resolution image signal by increasing the number of horizontal scanning line signals constituting each of the field image signals, said device comprising:
- (a) inner-field interpolation signal forming means arranged to receive said interlaced image signal and, with a given field image signal of said interlaced image signal assumed to be a first field image signal, to use said first field image signal for forming an inner-field interpolation signal for the first field image signal;
(b) inter-field interpolation signal forming means arranged to receive said interlaced image signal and to form an inter-field interpolation signal for said first field image signal by using at least a second field image signal which is received prior to said first field image signal within said interlaced image signal and is adjacent to said first field image signal;
(c) selective output means arranged to select and produce either said inner-field interpolation signal formed by said inner-field interpolation signal forming means or said inter-field interpolation signal formed by said inter-field interpolation signal forming means;
(d) control means for controlling said selective output means by using at least said first and second field image signals; and
(e) image signal forming means for forming a high resolution image signal b interpolating said interlaced image signal with said interpolation signal produced from said selective output means.
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Accused Products
Abstract
An image signal conversion device for handling an interlaced image signal whereby one frame picture plane is formed by multiplexing, in an alternately time sharing manner, odd- and even-number field image signals which form the interlaced image signal and respectively correspond to odd- and even-number field picture planes consisting of horizontal scanning lines alternately located on a picture plane is arranged to form a high resolution image signal by increasing the number of horizontal scanning line signals forming each of said field image signals in the following manner: A given field image signal within the interlaced image signal is assumed to be a first field image signal; an inner-field interpolation signal for the first field image signal is formed by using the first field image signal; an inter-field interpolation signal for the first field image signal is formed by using at least a second field image signal which is received immediately before the first field image signal; either the inner-field interpolation signal or the inter-field interpolation signal is selected for the interlaced signal by using at least the first and second field image signals; and a high solution image signal is obtained with the number of the horizontal scanning line signals increased for each of the field image signals by carrying out interpolation using the interpolation signal selected.
42 Citations
26 Claims
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1. An image signal conversion device for handling an interlaced image signal, whereby one frame picture plane is formed by multiplexing, in a time sharing manner, a plurality of field image signals corresponding to a plurality of field picture planes consisting of horizontal scanning lines located in different positions from each other on a picture plane, said device being arranged to form a high resolution image signal by increasing the number of horizontal scanning line signals constituting each of the field image signals, said device comprising:
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(a) inner-field interpolation signal forming means arranged to receive said interlaced image signal and, with a given field image signal of said interlaced image signal assumed to be a first field image signal, to use said first field image signal for forming an inner-field interpolation signal for the first field image signal; (b) inter-field interpolation signal forming means arranged to receive said interlaced image signal and to form an inter-field interpolation signal for said first field image signal by using at least a second field image signal which is received prior to said first field image signal within said interlaced image signal and is adjacent to said first field image signal; (c) selective output means arranged to select and produce either said inner-field interpolation signal formed by said inner-field interpolation signal forming means or said inter-field interpolation signal formed by said inter-field interpolation signal forming means; (d) control means for controlling said selective output means by using at least said first and second field image signals; and (e) image signal forming means for forming a high resolution image signal b interpolating said interlaced image signal with said interpolation signal produced from said selective output means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An image signal conversion device for handling an interlaced image signal whereby one frame picture plane is formed by multiplexing, in an alternately time sharing manner, odd- and even-number field image signals which form said interlaced image signal and respectively correspond to odd- and even-number field picture planes consisting of horizontal scanning lines alternately located on a picture plane, said device being arranged to form a high resolution image signal by increasing the number of horizontal scanning line signals constituting each of said field image signals, said device comprising:
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(a) inner-field interpolation signal forming means arranged to receive said interlaced image signal and, with a given field image signal of said interlaced image signal assumed to be a first field image signal to use the first field image signal for forming an inner-field interpolation signal for said first field image signal; (b) inter-field interpolation signal forming means arranged to receive said interlaced image signal and to form an inter-field interpolation signal for said first field image signal by using at least one field length of a second field image signal which has horizontal scanning lines in different positions on a corresponding picture plane from said first field image signal; (c) selective output means arranged to select and produce either said inner-field interpolation signal formed by said inner-field interpolation signal forming means or said inter-field interpolation signal formed by said inter-field interpolation signal forming means; (d) control means for controlling said selective output means by using at least said first and second field image signals; and (e) image signal forming means for forming a high resolution image signal by interpolating said interlaced image signal with said interpolation signal produced from said selective output means. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An image signal conversion device for handling an interlaced image signal whereby one frame picture plane is formed by multiplexing, in an alternately time sharing manner, odd- and even-number field image signals which form said interlaced image signal and respectively correspond to odd- and even-number field picture planes consisting of horizontal scanning lines alternately located on a picture plane, said device being arranged to form a high resolution image signal by increasing the number of horizontal scanning line signals constituting each of said field image signals, said device comprising:
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(a) inner field interpolation signal forming means arranged to receive said interlaced image signal, to use, as a first field image signal, a field image signal portion of said interlaced image signal received one frame period before a presently received field image signal portion for forming an inner-field interpolation signal for the first field image signal; (b) inter-field interpolation signal forming means arranged to receive said interlaced image signal and to form an inter-field interpolation signal for said first field image signal by using a second field image signal which has horizontal scanning lines in different positions on a corresponding picture plane from said first field image signal; (c) selective output means arranged to select and produce either the inner-field interpolation signal formed by said inner-field interpolation signal forming means or the inter-field interpolation signal formed by said inter-field interpolation signal forming means; (d) control means for controlling said selective output means on the basis of at least said first and second field image signals; and (e) image signal forming means for forming a high resolution image signal by interpolating said interlaced image signal with the interpolation signal produced from said selective output means. - View Dependent Claims (24, 25, 26)
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Specification