KR940025277A - Interlaced / Sequential Scan Inverter - Google Patents

Interlaced / Sequential Scan Inverter Download PDF

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Publication number
KR940025277A
KR940025277A KR1019930006098A KR930006098A KR940025277A KR 940025277 A KR940025277 A KR 940025277A KR 1019930006098 A KR1019930006098 A KR 1019930006098A KR 930006098 A KR930006098 A KR 930006098A KR 940025277 A KR940025277 A KR 940025277A
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KR
South Korea
Prior art keywords
data
interlaced
output
delay unit
median
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KR1019930006098A
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Korean (ko)
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KR0142296B1 (en
Inventor
황유모
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김광호
삼성전자 주식회사
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Priority to KR1019930006098A priority Critical patent/KR0142296B1/en
Publication of KR940025277A publication Critical patent/KR940025277A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/01Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117Conversion 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
    • H04N7/012Conversion between an interlaced and a progressive signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/21Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/213Circuitry for suppressing or minimising impulsive noise
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/20Special algorithmic details
    • G06T2207/20024Filtering details
    • G06T2207/20032Median filtering

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Television Systems (AREA)

Abstract

본 발명은 비월주사방식으로 TV신호를 순차주사방식의 TV신호로 변환하는 장치에 관한 것으로, 비월주사 방식의 영상데이타에 대해 메디안필터링 및 FIR필터링을 행하여 노이즈성분을 제거하고, 노이즈성분이 제거된 비월주사방식의 영상데이타에 대해 3-픽셀 메디안기법을 적용하여 비월주사된 영상데이타를 보간함으로써, 순차주사방식의 영상데이타를 얻는다. 본 발명에 의한 비월/순차주사 변환장치는 종래의 비월/순차주사 변환장치에서 발생하는 화상의 흐림현상(blurring)이나 윤곽부분이 경사경계 열화현상 등을 억제할 수 있다.The present invention relates to an apparatus for converting a TV signal into a sequential scan type TV signal by interlaced scanning method, and removes noise components by performing median filtering and FIR filtering on interlaced image data. By interpolating interlaced image data by applying 3-pixel median technique to interlaced image data, progressive scan image data is obtained. The interlaced / sequential scan converter according to the present invention can suppress blurring of an image or an inclination deterioration of an image generated in a conventional interlaced / sequential scan converter.

Description

비월/순차주사 변환장치Interlaced / Sequential Scan Inverter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 본 발명에 의한 비월/순차주사 변환장치의 일 실시예를 나타내는 블록도. 제 2 도는 제 1 도의 장치의 동작을 설명하기 위한 개념도. 제 3 도는 제 1 도의 장치에 대한 보다 상세한 블록도.1 is a block diagram showing an embodiment of an interlaced / sequential scan converter according to the present invention. 2 is a conceptual diagram for explaining the operation of the apparatus of FIG. 3 is a more detailed block diagram of the apparatus of FIG.

Claims (5)

비월주사방식의 TV영상데이타를 순차주사방식의 영상데이타로 변환하기 위한 장치에 있어서, 상기 비월주사방식의 영상데이타를 공급받고, 이 입력데이타에 포함된 노이즈성분을 제거하기 위해 2차에 걸친 소정의 필터링을 행하는 이중필터링부 ; 및 상기 이중필터링부의 출력데이타를 공급받고, 현재 필드의 인접한 2개 주사선과 이 2개 주사선의 가운데 위치에 해당하는 이전 필드의 주사선에 존재하는 픽셀들에 대해 3-픽셀 메디안을 행하여 순차주사방식의 영상데이타를 출력하는 비월/순차 변환부를 포함하는 것을 특징으로 하는 비월/순차주사 변환장치.An apparatus for converting interlaced TV video data into sequential scan video data, wherein the interlaced video data is supplied and predetermined to be applied over a second time to remove noise components included in the input data. A double filtering unit for filtering the data; And receiving the output data of the double filtering unit, and performing 3-pixel median on the pixels present in the two adjacent scanning lines of the current field and the scanning lines of the previous field corresponding to the center positions of the two scanning lines. An interlaced / sequential scan converter comprising: an interlaced / sequential converting unit for outputting image data. 제 1 항에 있어서, 상기 이중필터링부는 상기 입력 영상데이타의 각 픽셀데이타에 대한 메디안값을 산출하여 모든 픽셀데이타를 해당 메디안값으로 대체시키는 메디안필터 ; 상기 입력 영상데이타와 상기 메디안필터의 출력데이타간의 오차값을 산출하는 감산기 ; 상기 감간기의 출력데이타를 유한충력 응답필터링하는 FIR 필터 ; 및 상기 메디안필터의 출력데이타와 상기 FIR필터의 출력데이타를 가산하여 출력하는 가산기를 포함하는 것을 특징으로 하는 비월/순차주사 변환장치.The median filter of claim 1, wherein the double filtering unit comprises: a median filter configured to calculate a median value for each pixel data of the input image data and replace all pixel data with the median value; A subtractor for calculating an error value between the input image data and the output data of the median filter; A FIR filter for filtering the output data of the derailleur; And an adder for adding and outputting the output data of the median filter and the output data of the FIR filter. 제 2 항에 있어서, 상기 이중필터링부는 상기 감산기로 입력되는 2개 입력데이타를 동기시키기 위해 상기 입력영상데이타를 1주사선 구간 만큼 지연시키는 제 1 주사선지연기 ; 및 상기 가산기로 입력되는 2개 입력데이타를 동기시키기 위해 상기 메디안필터의 출력데이타를 1주사선 구간 만큼 지연시키는 제 2 주사선지연기를 추가로 포함하는 것을 특징으로 하는 비월/순차주사 변환장치.3. The apparatus of claim 2, wherein the double filtering unit comprises: a first scan line delay unit for delaying the input image data by one scanning line section to synchronize two input data input to the subtractor; And a second scan line delay unit for delaying the output data of the median filter by one scan line section to synchronize two input data input to the adder. 제 2 항에 있어서, 상기 메디안필터는 일정 갯수의 픽셀들로 이루어지는 블록단위로 영상데이타를 공급받고, 상기 블록내의 픽셀들이 동시에 출력되도록 각 픽셀데이타를 적절히 지연시키기 위한 복수개의 주사선 지연기 및 픽셀 지연기로 이루어지는 지연부 ; 및 상기 지연부에서 동시에 공급되는 픽셀들을 크기순으로 배열하여, 메디안값에 해당하는 픽셀데이타를 출력하는 소터를 포함하는 것을 특징으로 하는 비월/순차주사 변환장치.3. The median filter of claim 2, wherein the median filter receives image data in units of blocks of a predetermined number of pixels, and a plurality of scan line delayers and pixel delays for appropriately delaying each pixel data to simultaneously output pixels in the block. Delay unit comprising a group; And a sorter for arranging pixels simultaneously supplied by the delay unit in size order and outputting pixel data corresponding to a median value. 제 1 항에 있어서, 상기 비월/순차 변환부는 상기 이중필터링부로 부터 공급되는 픽셀데이타를 1주사선 구간만큼 지연하는 주사선 지연기 ; 상기 주사선 지연기에서 출력되는 픽셀데이타를 1필드구간 동안 지연하는 필드 지연기 ; 및 상기 이중필터링부로부터 공급되는 픽셀데이타, 상기 주사선지연기에서 출력되는 픽셀데이타 및 상기 필드 지연기에서 출력되는 픽셀데이타를 공급받아, 이 픽셀들의 메디안값을 산출하는 수단을 포함하는 것을 특징으로 하는 비월/순차주사 변환기.The apparatus of claim 1, wherein the interlacing / sequential converting unit comprises: a scan line delay unit configured to delay pixel data supplied from the double filtering unit by one scanning line section; A field delay unit for delaying pixel data output from the scan line delay unit for one field period; And means for calculating the median value of the pixels by receiving the pixel data supplied from the double filtering unit, the pixel data output from the scan line delay unit, and the pixel data output from the field delay unit. Interlaced / sequential scan converter. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019930006098A 1993-04-13 1993-04-13 A exchanging apparatus for scanning KR0142296B1 (en)

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KR1019930006098A KR0142296B1 (en) 1993-04-13 1993-04-13 A exchanging apparatus for scanning

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KR1019930006098A KR0142296B1 (en) 1993-04-13 1993-04-13 A exchanging apparatus for scanning

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KR940025277A true KR940025277A (en) 1994-11-19
KR0142296B1 KR0142296B1 (en) 1998-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100280848B1 (en) * 1998-03-20 2001-02-01 김영안 Video Scanning Conversion Circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100280848B1 (en) * 1998-03-20 2001-02-01 김영안 Video Scanning Conversion Circuit

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KR0142296B1 (en) 1998-06-15

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