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Apparatus for interpolating scanning lines

An interpolation and scan line technology, applied in the field of progressive scan conversion methods and devices, can solve the problems of inability to interpolate pixels and to fully obtain the effect of image quality improvement.

Active Publication Date: 2006-08-23
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In this way, since the scan line interpolation is performed in units of pixels regardless of the pixel structure of the display device, for example, when the display device has few pixels in the horizontal direction, accurate pixel interpolation in the horizontal direction cannot be performed. , so there are shadows on the vertical edge, or discontinuous slanted lines, etc., and the image quality improvement effect based on scan line interpolation cannot be fully obtained.

Method used

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  • Apparatus for interpolating scanning lines
  • Apparatus for interpolating scanning lines
  • Apparatus for interpolating scanning lines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 A configuration example of a video receiver using the present invention is shown in .

[0033] The signal input to the scanning line interpolator 101 is an interlaced video signal when receiving television broadcast or the like, or an interlaced video signal output from a DVD player or the like. Motion vectors are searched in motion vector searcher 102 for an input 2:1 interlaced image. The motion vector indicates how much a certain part of the current processing target screen has moved from another screen or which part of the same screen. There are several methods for detecting the motion vector, but the block matching method is widely used because it is easy to perform processing with a digital circuit. In the block matching method, an image is divided into blocks of (M×N) pixels (for example, 8 pixels×8 lines), and motion vectors are detected in units of the blocks.

[0034] The storage device 103 is necessary for the motion vector search. Record a refe...

Embodiment 2

[0045] Although in Embodiment 1, an example including a display device was shown as a video receiver, the present invention relates to a progressive scan converting device such as Figure 7 As shown in , the display device and other components may be other. In this case, the dynamic search controller (104) can operate in such a manner as to switch the search precision at any time, receiving notification of information on its pixel structure from the connected display device. Of course, it is also possible to associate the device with its pixel structure, store it in the storage unit in advance, and determine the accuracy based on the model number obtained from the display unit.

[0046] According to this configuration, when the pixel configuration or model information of the display device is obtained, the motion vector search accuracy can be automatically switched, and progressive scan conversion suitable for the display device can be performed.

[0047] In addition, when a ...

Embodiment 3

[0049] When the pixel structure of the display unit is unknown or information about the pixel structure cannot be obtained, it may be considered to install a switch so that the search precision of the motion vector search can be fixed to a predetermined pixel precision (for example, 1 pixel precision) .

[0050] In addition, a switch may be provided in the search unit to switch the input from the motion vector search unit to the scan line interpolator so that the conventional interpolation method that does not use motion vector search for scan line conversion can be selected. In this case, scan conversion can be performed by a conversion method separately prepared in the scan line interpolator.

[0051] By setting the switch of the search accuracy of the motion vector or the switch of the progressive scanning conversion method, they are switched by the user's instruction or automatically, thereby, in the case where the pixel structure including the display part is unclear or c...

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PUM

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Abstract

A scanning line interpolating apparatus has a scanning line interpolating unit (101) for converting an inputted interlaced scanning picture to a progressive scanning picture by using motion compensation, a motion vector search device (102) that searches for a motion vector for use in the motion compensation, and a control unit (104) for controlling the precision with which the motion vector is searched for. The control unit (104) is adapted to determine the search precision on the basis of a pixel structure of a display device (105) for displaying the progressive scanning picture.

Description

technical field [0001] The present invention relates to a progressive scanning conversion circuit for converting interlaced scanning signals into progressive scanning signals, in particular to a progressive scanning conversion method and device for generating interpolation signals through motion vector detection. Background technique [0002] In order to convert a 2:1 interlaced scanning signal into a progressive scanning signal, it is necessary to interpolate every other scanning line. As one of the interpolation methods, there is a motion compensation type progressive scan conversion. like figure 2 As shown in , scanning lines are interpolated using motion vectors between frames or fields (see Japanese Patent Application Laid-Open No. 6-121289). [0003] A motion vector indicates where a certain part of the current frame moves from the previous frame. In the block matching method (block matching), the best block most similar to the target block of the current frame or c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N5/66
CPCH04N7/012H04N7/014H04N7/364H04N19/0063H04N19/00739H04N19/523
Inventor 浜田宏一中嶋满雄
Owner MAXELL HLDG LTD