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Image format converting device and method

A technology of image format and conversion device, applied in the direction of standard conversion, image communication, film film standard conversion, etc., can solve the problems of broken, unable to display smoothly, etc.

Inactive Publication Date: 2004-07-14
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, images in 3:2 pulldown format may contain interlaced text that scrolls horizontally, or graphical data such as subtitles, etc.
In this case, if a progressive image prior to 3:2 pull-down interpolation is reproduced by simply combining interlaced fields without regard to scrolling text or graphics data, the text or its analogous interpolated image cannot be displayed smoothly and in the worst case may display broken text

Method used

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  • Image format converting device and method
  • Image format converting device and method
  • Image format converting device and method

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Embodiment Construction

[0029] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments described below are provided to explain the present invention by referring to these figures.

[0030] figure 2 is a block diagram showing an image format conversion device according to an embodiment of the present invention. The image format converting apparatus is composed of scrolling text / graphics detection section 100, 3:2 pulldown detection section 150, 3:2 pulldown compensation section 200, IPC section 250, conversion processing selection section 300, and output section 350.

[0031]An input image in an interlaced format used for interpolation is input to the scrolling text / graphics detection section 100, the 3:2 pulldown detection section 150, the 3:2 pulldown compensation section 200, and the IPC section 250, and the input im...

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Abstract

An image format conversion apparatus including a 3:2 pull-down detection part determining whether a current field out of plural fields continuous in time is an image of a 3:2 pull-down format produced by a 3:2 pull-down process; a scroll text / graphic data detection part determining whether scroll motions exist on the current field; a 3:2 pull-down compensation part calculating interpolation values for pixels of the current field to be interpolated by using a 3:2 pull-down interpolation method; an IPC part calculating interpolation values for pixels of the current field to be interpolated by using a second interpolation method; and an output selection part for selectively outputting either the interpolation values of the 3:2 pull-down compensation part or the interpolation values of the IPC part based on results of the determinations of the scroll text / graphic detection part and the 3:2 pull-down detection part.

Description

technical field [0001] The present invention relates to an image format conversion device and its method, more particularly, to an image format conversion device and its method, which can detect and convert the level of interlaced format (interlace format) without error. Moving text and graphics data is converted to images in progressive format, where interlaced formats are included in images produced by 3:2 pulldown. Background technique [0002] Typically, image display devices use either an interlaced scan mode or a progressive scan mode. The interlaced scanning mode is generally used in televisions and the like, which divides one image frame into two fields, and displays these fields on the screen one by one when displaying an image. At this time, the two fields are called top field and bottom field, upper field and lower field, odd field and even field. field) and so on. On the other hand, progressive scan or non-interlaced scan mode is used in computer monitors, dig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/66H04N5/14H04N7/01
CPCH04N7/012H04N21/4884H04N7/0112H04N5/144H04N7/01
Inventor 郑维永李泳镐梁承埈李钟桓
Owner SAMSUNG ELECTRONICS CO LTD