WO2003107662A1 - Method and device for representing a digitized image - Google Patents
Method and device for representing a digitized image Download PDFInfo
- Publication number
- WO2003107662A1 WO2003107662A1 PCT/DE2003/001757 DE0301757W WO03107662A1 WO 2003107662 A1 WO2003107662 A1 WO 2003107662A1 DE 0301757 W DE0301757 W DE 0301757W WO 03107662 A1 WO03107662 A1 WO 03107662A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- digitized
- points
- digitized image
- line
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
Definitions
- the invention relates to a method and a device for displaying a digitized image.
- DVDs digital virtual disc
- This storage medium for feature films is intended to replace the VHS video tapes, which is still the most widely used medium in the future.
- DVDs have the advantage that the mechanical load is not so great, so that the playback quality is not impaired even with frequent playback, and in addition to higher image quality, there are other advantages such as sound in several languages and additional effects.
- the video image on a DVD is composed of a large number of pixels with corresponding image information. The resolution is 720 pixels in the horizontal direction and 576 pixels in the vertical direction.
- the typical digitized image recorded on a DVD is divided into 720 columns and 576 lines.
- Usual DVD players offer three different playback formats. Firstly 16: 9, secondly 4: 3 (full screen / pan and scan) and thirdly 4: 3 (letterbox).
- the 16: 9 format is intended for display on wide-format televisions that have an aspect ratio of 16: 9.
- the digitized image stored on the DVD is scanned unchanged and fed to the television as an analog video signal, for example via the so-called "scart connection".
- the 16: 9 television set now has more or less pronounced black picture edges above or below the displayed picture.
- the black image strip above and below the image is correspondingly wider on a 16: 9 television set.
- the recorded image is shown full-screen on the television as a so-called "full screen”. Because of the very different aspect ratio of the screen compared to the aspect ratio of the feature film to be displayed, the image is distorted, so that stretching in the vertical direction is perceptible.
- the 4: 3 (pen and scan) playback method is offered. For this purpose, a 4: 3 section is selected from the actual picture format and carried along with the main plot of the film. Since this is very complex and has to be stored on the DVD as additional information, such information is only available in a few feature films.
- the invention is based on the object of using a simple means to display a broadband image with as little distortion as possible on an analog display device over the full area. This object is achieved with the measures specified in claim 1.
- image information that is to be displayed is shortened in the horizontal direction and is stretched across the entire display device width in the horizontal direction by the display means that vertical expansion of the broadband image is avoided despite full-screen display.
- Figure 1 shows an embodiment of the image display according to the invention
- FIG. 2 is a block diagram of an embodiment of an apparatus for performing the method according to the invention
- FIG. 1 shows an image of a digitized image broken down into pixels P, which is provided for this purpose by means of an image feed device.
- a normalized length B 1
- This image is said to be in a format customary for DVD applications.
- This means that the image is divided into 720 columns in the horizontal direction and 576 lines in the vertical direction, with a respective pixel lying at the intersection of rows and columns.
- the pixels can thus be defined in the horizontal direction by their coordinates. That means the columns can be numbered from left to right as A0 to AM and the rows from top to bottom as B0 to BN. Accordingly, the first point is in the upper left corner with PA0 / B0 and the point in the lower right
- the individual pixels PA0 / B0 to PAM / BN present in the image feed device 1 are scanned line by line at the upper or lower edge, ie starting at the line B0 or BN, for the conversion into an analog signal.
- This representation has the following effects.
- a usual line number of 625 lines is used in the PAL system and 576 lines in accordance with the usual DVD standard, taking into account that, for example, a blanking gap of a few lines is selected in accordance with the PAL system , ie at the top and bottom there are image lines that lie outside the visible area, the supplied image is almost completely displayed in the vertical direction. This would initially lead to vertical distortion.
- Embodiment with an aspect ratio Vl 2.35, an almost distortion-free representation should be granted if only 540 of the 720 columns available are scanned and thus displayed.
- the device for displaying a digitized image according to the method described above is shown in the block diagram.
- an image feeder 1 for example an image memory
- the digitized values of the pixels of at least one partial image are stored. These are scanned by the scanning device 3, starting at the column AX, up to the column AY and fed to the analog display device 2 as an analog signal.
- the analog display device 2 is, for example, a television set which operates according to the PAL system, it would be sufficient if, for example, only one field, ie only the pixels of every second line, is supplied by the image feed device 1. Subsequently, after a field has been scanned, the lines not previously fed in must be fed by the image feeder 1. It is equally possible that the image feed device feeds only one line for scanning at a time and feeds a new line after each line scanned.
- the image feed device feeds the pixels to be scanned point by point and does not feed the points of the columns A0 to AX-1 or AY + 1 to AM, so that the scanning device 3 then scans all the supplied pixels and a corresponding video signal
- Display device 2 feeds.
- the described procedure or the described system can be applied to all presentation standards.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003250740A AU2003250740A1 (en) | 2002-06-12 | 2003-05-28 | Method and device for representing a digitized image |
EP03759822A EP1512282A1 (en) | 2002-06-12 | 2003-05-28 | Method and device for representing a digitized image |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002126071 DE10226071A1 (en) | 2002-06-12 | 2002-06-12 | Method and device for displaying a digitized image |
DE10226071.0 | 2002-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003107662A1 true WO2003107662A1 (en) | 2003-12-24 |
Family
ID=29718982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/001757 WO2003107662A1 (en) | 2002-06-12 | 2003-05-28 | Method and device for representing a digitized image |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1512282A1 (en) |
AU (1) | AU2003250740A1 (en) |
DE (1) | DE10226071A1 (en) |
WO (1) | WO2003107662A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0831645A1 (en) * | 1990-06-01 | 1998-03-25 | Thomson Consumer Electronics, Inc. | Automatic letterbox detection |
US5862300A (en) * | 1995-07-07 | 1999-01-19 | Sony Corporation | Control of an image display based on a permission signal |
US6016362A (en) * | 1996-07-09 | 2000-01-18 | Sony Corporation | Apparatus and method for image coding and decoding |
US20020047918A1 (en) * | 2000-10-19 | 2002-04-25 | Sullivan Gary J. | Method and apparatus for encoding video content |
-
2002
- 2002-06-12 DE DE2002126071 patent/DE10226071A1/en not_active Ceased
-
2003
- 2003-05-28 AU AU2003250740A patent/AU2003250740A1/en not_active Abandoned
- 2003-05-28 EP EP03759822A patent/EP1512282A1/en not_active Withdrawn
- 2003-05-28 WO PCT/DE2003/001757 patent/WO2003107662A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0831645A1 (en) * | 1990-06-01 | 1998-03-25 | Thomson Consumer Electronics, Inc. | Automatic letterbox detection |
US5862300A (en) * | 1995-07-07 | 1999-01-19 | Sony Corporation | Control of an image display based on a permission signal |
US6016362A (en) * | 1996-07-09 | 2000-01-18 | Sony Corporation | Apparatus and method for image coding and decoding |
US20020047918A1 (en) * | 2000-10-19 | 2002-04-25 | Sullivan Gary J. | Method and apparatus for encoding video content |
Also Published As
Publication number | Publication date |
---|---|
AU2003250740A1 (en) | 2003-12-31 |
DE10226071A1 (en) | 2004-01-08 |
EP1512282A1 (en) | 2005-03-09 |
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