US5136398A — Multiple display formats for letterbox signal

Claim 1

Independent Claim 111 words

A television apparatus, comprising: a video display means having a wide format display ratio; means for effecting horizontal deflection for said wide format video display means; and, means for controlling vertical deflection height according to any one of a plurality of selectable vertical deflection formats appropriate for displaying pictures from different video sources, one of said vertical formats being adapted for displaying a picture from a source having a format display ratio narrower than said wide format display ratio and having an active picture portion bordered top and bottom by substantially inactive picture portions, resulting in a display of substantially only said active picture portion without substantial image aspect ratio distortion.

Claim 2

Dependent Claim 111 words

A television apparatus, comprising: a video display means having a wide format display ratio; means for effecting horizontal deflection for said wide format video display means; and, means for controlling vertical deflection height according to any one of a plurality of selectable vertical deflection formats appropriate for displaying pictures from different video sources, one of said vertical formats being adapted for displaying a picture from a source having a format display ratio narrower than said wide format display ratio and having an active picture portion bordered top and bottom by substantially inactive picture portions, resulting in a display of substantially only said active picture portion without substantial image aspect ratio distortion.

Claim 3

Dependent Claim 67 words

The apparatus of claim 1, wherein said vertical format is adapted for displaying a picture from another source having a format display ratio narrower than said wide format display ratio and having a substantially complete active picture portion, resulting in some vertical cropping of said active picture portion and an enlarged display of the rest of said complete active picture portion without substantial image aspect ratio distortion.

Claim 4

Dependent Claim 61 words

The apparatus of claim 1, wherein another one of said vertical formats is adapted for displaying a picture from a source having a format display ratio substantially the same as said wide format display ratio and having a substantially complete active picture portion, resulting in a display of substantially all of said active picture portion without substantial image aspect ratio distortion.

Claim 5

Dependent Claim 24 words

The apparatus of claim 1, further comprising means responsive to said selection of said vertical formats for correcting convergence errors of said display means.

Claim 6

Dependent Claim 98 words

A television apparatus, comprising: a video display means having a wide format display ratio; deflection means for generating first and second selectable rasters having a common horizontal scan width corresponding to said display means but having nominal and overscan vertical heights respectively; and, means for selecting between said first and second rasters for displaying pictures from wide format display ratio video sources and conventional format display ratio video sources respectively, a picture from said wide format display ratio video source being substantially uncropped and a picture from said conventional format display ratio video source being expanded and cropped.

Claim 7

Dependent Claim 98 words

A television apparatus, comprising: a video display means having a wide format display ratio; deflection means for generating first and second selectable rasters having a common horizontal scan width corresponding to said display means but having nominal and overscan vertical heights respectively; and, means for selecting between said first and second rasters for displaying pictures from wide format display ratio video sources and conventional format display ratio video sources respectively, a picture from said wide format display ratio video source being substantially uncropped and a picture from said conventional format display ratio video source being expanded and cropped.

Claim 8

Dependent Claim 31 words

The apparatus of claim 5, wherein said cropped part of said picture from said conventional format display ratio source substantially corresponds to upper and lower borders of a letterbox format signal.

Claim 9

Dependent Claim 33 words

The apparatus of claim 5, wherein said picture from said conventional format display ratio source is expanded vertically by a factor of approximately 4/3 and cropped vertically by a factor of approximately 1/3.

Claim 10

Dependent Claim 30 words

The apparatus of claim 5, wherein said deflection means generates a plurality of rasters having said common horizontal scan width appropriate for said display means but having different vertical heights.

Claim 11

Dependent Claim 43 words

The apparatus of claim 8, wherein said different vertical heights of said selectable rasters range from a lowest value corresponding approximately to a vertical height corresponding to said display means to an upper value at least approximately 4/3 larger than said lowest value.

Claim 12

Dependent Claim 45 words

The apparatus of claim 8, wherein a picture from said conventional format display ratio video source can be displayed according to any one of said plurality of rasters, each of said rasters resulting in different relative amounts of image aspect ratio distortion and picture cropping.

Claim 13

Dependent Claim 23 words

The apparatus of claim 5, further comprising means responsive to said selection of said rasters for correcting convergence errors of said display means.

Claim 14

Dependent Claim 99 words

A television apparatus, comprising: a video display means having a wide aspect ratio; means for generating picture formats on said display means, said picture formats having a common horizontal width corresponding to said display means but having different vertical heights; and, means for selecting between said picture formats for displaying pictures from each of video sources having different format display ratios, a picture from a first video source being displayed substantially uncropped according to one of said picture formats and a picture from a second video source being displayed expanded and cropped according to another of said picture formats.

Claim 15

Dependent Claim 99 words

A television apparatus, comprising: a video display means having a wide aspect ratio; means for generating picture formats on said display means, said picture formats having a common horizontal width corresponding to said display means but having different vertical heights; and, means for selecting between said picture formats for displaying pictures from each of video sources having different format display ratios, a picture from a first video source being displayed substantially uncropped according to one of said picture formats and a picture from a second video source being displayed expanded and cropped according to another of said picture formats.

Claim 16

Dependent Claim 29 words

The apparatus of claim 12, wherein said cropped part of said picture from said second video source substantially corresponds to upper and lower borders of a letterbox format signal.

Claim 17

Dependent Claim 33 words

The apparatus of claim 12, wherein said picture from said second video source is expanded horizontally and vertically by a factor of approximately 4/3 and cropped vertically by a factor of approximately 1/3.

Claim 18

Dependent Claim 39 words

The apparatus of claim 12, wherein said different vertical heights range from a lower value corresponding approximately to a vertical height corresponding to said display means to an upper value at least approximately 4/3 larger than said lower value.

Claim 19

Dependent Claim 41 words

The apparatus of claim 12, wherein said picture from said second video source can be displayed according to any one of said picture formats, each of said formats resulting in different relative amounts of image aspect ratio distortion and picture cropping.

Claim 20

Dependent Claim 24 words

The apparatus of claim 12, further comprising means responsive to said selection of said picture formats for correcting convergence errors of said display means.

Claim 21

Dependent Claim 74 words

A television apparatus, comprising: a video display means having a wide format display ratio; means for effecting horizontal deflection corresponding to said display means; means for effecting vertical deflection according to any one of a plurality of selectable vertical deflection formats appropriate for displaying pictures from different video sources having different format display ratios, said selectable vertical deflection formats resulting in different relative amounts of image aspect ratio distortion and cropping of said picture.

Claim 22

Dependent Claim 74 words

A television apparatus, comprising: a video display means having a wide format display ratio; means for effecting horizontal deflection corresponding to said display means; means for effecting vertical deflection according to any one of a plurality of selectable vertical deflection formats appropriate for displaying pictures from different video sources having different format display ratios, said selectable vertical deflection formats resulting in different relative amounts of image aspect ratio distortion and cropping of said picture.

Claim 23

Dependent Claim 23 words

The apparatus of claim 18, wherein one of said vertical formats provides substantially no image aspect ratio distortion of said picture as displayed.

Claim 24

Dependent Claim 20 words

The apparatus of claim 18, wherein one of said vertical formats provides substantially no cropping of said picture as displayed.

Claim 25

Dependent Claim 25 words

The apparatus of claim 18, wherein said relative amounts of image aspect ratio distortion and cropping of said picture as displayed are substantially inversely proportional.

Claim 26

Dependent Claim 35 words

The apparatus of claim 18, wherein one of said vertical formats provides substantially no image aspect ratio distortion and substantially no cropping of said picture as displayed, when said picture is transmitted in letterbox format.

Claim 27

Dependent Claim 24 words

The apparatus of claim 18, further comprising means responsive to said selection of said vertical formats for correcting convergence errors of said display means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-08-04	1996-02-03	1996-08-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-08-04	2000-02-03	2000-08-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-08-04	2004-02-03	2004-08-04	$7700.00	Window Closed / Lapsed

Multiple display formats for letterbox signal

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