MY109111A - Managing letterbox displays - Google Patents
Managing letterbox displaysInfo
- Publication number
- MY109111A MY109111A MYPI93000592A MYPI19930592A MY109111A MY 109111 A MY109111 A MY 109111A MY PI93000592 A MYPI93000592 A MY PI93000592A MY PI19930592 A MYPI19930592 A MY PI19930592A MY 109111 A MY109111 A MY 109111A
- Authority
- MY
- Malaysia
- Prior art keywords
- picture
- display
- video
- format
- letterbox
- Prior art date
Links
Landscapes
- Details Of Television Scanning (AREA)
- Television Systems (AREA)
Abstract
A VIDEO DISPLAY CONTROL SYSTEM COMPRISES A VIDEO DISPLAY HAVING A FIRST FORMAT DISPLAY RATIO. A PICTURE HEIGHT CIRCUIT DETERMINES AN ACTIVE VIDEO PICTURE HEIGHT FROM AN INPUT VIDEO SIGNAL HAVING A SECOND FORMAT DISPLAY RATIO. A DETECTOR CIRCUIT IDENTIFIES LETTERBOX FORMATS RESPONSIVE TO THE ACTIVE VIDEO PICTURE HEIGHT IN THE VIDEO SIGNAL AND DETERMINES A FORMAT DISPLAY RATIO OF THE LETTERBOX PICTURE. A ZOOM CONTROL CIRCUIT IS OPERABLE IN A FIRST MODE OF OPERATION FOR ENLARGING THE PICTURE IN SIZE TO FILL THE DISPLAY SUBSTANTIALLY ENTIRELY, NOTWITHSTANDING CONSEQUENT CROPPING OF THE PICTURE, AND OPERABLE IN A SECOND MODE OF OPERATION FOR ENLARGING THE PICTURE IN SIZE TO SUBSTANTIALLY FILL THE DISPLAY VERTICALLY, NOTWITHSTANDING CONSEQUENT UNUSED PORTIONS OF THE DISPLAY. A VERTICAL PAN CONTROL CIRCUIT AUTOMATICALLY CENTERS THE PICTURE IN BOTH MODES OF OPERATION. THE DETECTOR CAN IDENTIFY THE FORMAT DISPLAY RATIO OF THE LETTERBOX FORMAT PICTURE A CIRCUIT RESPONSIVE TO THE IDENTIFIED FORMAT DISPLAY RATIO CONTROLS IMAGE ASPECT RATIO DISTORTION OF THE ENLARGED PICTURE. A DEFLECTION SYSTEM IS CONTROLLABLE IN VERTICAL SIZE BY A VARIABLE VERTICAL SCAN RATE, IN HORIZONTAL SIZE BY VARIABLE HORIZONTAL VIDEO EXPANSION AND COMPRESSION, AND IN PAN POSITION BY VARYING THE VERTICAL RESET IN PHASE. (FIG.2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/817,236 US5249049A (en) | 1990-06-01 | 1992-01-06 | Managing letterbox displays |
Publications (1)
Publication Number | Publication Date |
---|---|
MY109111A true MY109111A (en) | 1996-12-31 |
Family
ID=51348306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI93000592A MY109111A (en) | 1992-01-06 | 1993-04-02 | Managing letterbox displays |
Country Status (2)
Country | Link |
---|---|
MY (1) | MY109111A (en) |
TW (1) | TW225083B (en) |
-
1993
- 1993-04-02 TW TW82102487A patent/TW225083B/zh not_active IP Right Cessation
- 1993-04-02 MY MYPI93000592A patent/MY109111A/en unknown
Also Published As
Publication number | Publication date |
---|---|
TW225083B (en) | 1994-06-11 |
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