CA2179783A1 - Video magnification apparatus - Google Patents

Video magnification apparatus

Info

Publication number
CA2179783A1
CA2179783A1 CA2179783A CA2179783A CA2179783A1 CA 2179783 A1 CA2179783 A1 CA 2179783A1 CA 2179783 A CA2179783 A CA 2179783A CA 2179783 A CA2179783 A CA 2179783A CA 2179783 A1 CA2179783 A1 CA 2179783A1
Authority
CA
Canada
Prior art keywords
magnification
graphic
transmission
unity
magnification factor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2179783A
Other languages
French (fr)
Other versions
CA2179783C (en
Inventor
Donald S. Butler
Richard S. Amano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arris Technology Inc
Original Assignee
General Instrument Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Instrument Corp filed Critical General Instrument Corp
Publication of CA2179783A1 publication Critical patent/CA2179783A1/en
Application granted granted Critical
Publication of CA2179783C publication Critical patent/CA2179783C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformation in the plane of the image
    • G06T3/40—Scaling the whole image or part thereof
    • G06T3/4023—Decimation- or insertion-based scaling, e.g. pixel or line decimation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Television Systems (AREA)
  • Image Processing (AREA)
  • Studio Circuits (AREA)

Abstract

Video magnification apparatus modifies (shrinks or enlarges) video graphic images in a horizontal and vertical direction during a transfer of video graphics data signals from a graphics memory to a television screen. A first magnification modifying device modifies the magnification of a graphic by a vertical magnification factor by generating graphic line address output signals that selectively prevent a transmission of predetermined horizontal lines of the graphic upon the reception of a vertical magnification factor that is less than unity. The first device also causes a transmission of predetermined horizontal lines of the graphic to be selectively repeated upon the reception of a vertical magnification factor that is greater than unity. A
second magnification modifying device is responsive to the transmissions of the horizontal lines of the graphic indicated for transmission by the output signals of the first magnification modifying means for modifying the magnification of the graphic in a horizontal direction by a horizontal magnification factor. The second magnification modifying device selects N predetermined pixels of each received X pixel group that are multiplexed into a transmitting X pixel group for transmission in each output signal of the apparatus for a magnification factor equal to or less than unity. Still further, the second device repeats pixels of each received X pixel group a number of times corresponding to an integer magnification factor that is greater than unity for transmission in each output signal of the apparatus.
CA002179783A 1995-08-31 1996-06-24 Video magnification apparatus Expired - Fee Related CA2179783C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US523,789 1995-08-31
US08/523,789 US5838296A (en) 1995-08-31 1995-08-31 Apparatus for changing the magnification of video graphics prior to display therefor on a TV screen

Publications (2)

Publication Number Publication Date
CA2179783A1 true CA2179783A1 (en) 1997-03-01
CA2179783C CA2179783C (en) 2000-03-14

Family

ID=24086471

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002179783A Expired - Fee Related CA2179783C (en) 1995-08-31 1996-06-24 Video magnification apparatus

Country Status (9)

Country Link
US (1) US5838296A (en)
EP (1) EP0762325B1 (en)
JP (2) JP3484298B2 (en)
KR (1) KR100249403B1 (en)
CA (1) CA2179783C (en)
DE (1) DE69630345T2 (en)
HK (1) HK1014068A1 (en)
MX (1) MX9603749A (en)
NO (1) NO963577L (en)

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US6515678B1 (en) * 1999-11-18 2003-02-04 Gateway, Inc. Video magnifier for a display of data
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US7305680B2 (en) * 2002-08-13 2007-12-04 Sharp Laboratories Of America, Inc. Listening module for asynchronous messages sent between electronic devices of a distributed network
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US8325282B2 (en) * 2008-04-08 2012-12-04 Mitsubishi Electric Visual Solutions America, Inc. Television automatic geometry adjustment system
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US20110242427A1 (en) * 2010-04-01 2011-10-06 Timothy Ramsdale Method and System for Providing 1080P Video With 32-Bit Mobile DDR Memory
US10077109B2 (en) * 2014-01-24 2018-09-18 Maxlinear, Inc. First-person viewer for unmanned vehicles
KR20230077016A (en) * 2021-11-24 2023-06-01 삼성디스플레이 주식회사 Display device and data compensating method thereof

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Also Published As

Publication number Publication date
CA2179783C (en) 2000-03-14
EP0762325A3 (en) 1998-06-17
DE69630345T2 (en) 2004-07-15
EP0762325A2 (en) 1997-03-12
JP3484298B2 (en) 2004-01-06
DE69630345D1 (en) 2003-11-20
KR100249403B1 (en) 2000-03-15
MX9603749A (en) 1997-06-28
EP0762325B1 (en) 2003-10-15
NO963577D0 (en) 1996-08-27
HK1014068A1 (en) 1999-09-17
KR19980016383A (en) 1998-05-25
US5838296A (en) 1998-11-17
JP2001169181A (en) 2001-06-22
NO963577L (en) 1997-03-03
JPH09149334A (en) 1997-06-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20080625