WO1996042165A3 - A transform artifact reduction process - Google Patents

A transform artifact reduction process Download PDF

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Publication number
WO1996042165A3
WO1996042165A3 PCT/US1996/008290 US9608290W WO9642165A3 WO 1996042165 A3 WO1996042165 A3 WO 1996042165A3 US 9608290 W US9608290 W US 9608290W WO 9642165 A3 WO9642165 A3 WO 9642165A3
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WO
WIPO (PCT)
Prior art keywords
post
processor
image
artifact reduction
texture
Prior art date
Application number
PCT/US1996/008290
Other languages
French (fr)
Other versions
WO1996042165A2 (en
Inventor
Smita Gupta
Yi Tong Tse
Original Assignee
Compression Labs Inc
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 Compression Labs Inc filed Critical Compression Labs Inc
Priority to AU73574/96A priority Critical patent/AU7357496A/en
Publication of WO1996042165A2 publication Critical patent/WO1996042165A2/en
Publication of WO1996042165A3 publication Critical patent/WO1996042165A3/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/527—Global motion vector estimation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/20—Image enhancement or restoration by the use of local operators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Picture Signal Circuits (AREA)
  • Image Processing (AREA)

Abstract

A post-processor for a decoded video sequence includes a digital noise reduction unit and an artifact reduction unit which significantly reduce blocking artifacts and mosquito noise in a video image. The post-processor uses both temporal and edge characteristics of the video image to enhance the displayed image. The post-processor operates on a current frame of pixel data using information from the immediately preceding post-processed frame that is stored in a frame memory of the post-processor. The post-processor first identifies texture and fine detail areas in the image. The post-processor uses artifact reduction only on portions of the image that are not part of an edge, and are not part of a texture or fine detail area. Since artifact reduction is not utilized on these areas, the post-processed image is not softened in regions where it is easily noticed by the human eye.
PCT/US1996/008290 1995-06-06 1996-06-05 A transform artifact reduction process WO1996042165A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73574/96A AU7357496A (en) 1995-06-06 1996-06-05 A transform artifact reduction process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/486,279 US5852475A (en) 1995-06-06 1995-06-06 Transform artifact reduction process
US486,279 1995-06-06

Publications (2)

Publication Number Publication Date
WO1996042165A2 WO1996042165A2 (en) 1996-12-27
WO1996042165A3 true WO1996042165A3 (en) 1997-02-20

Family

ID=23931264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/008290 WO1996042165A2 (en) 1995-06-06 1996-06-05 A transform artifact reduction process

Country Status (3)

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US (2) US5852475A (en)
AU (1) AU7357496A (en)
WO (1) WO1996042165A2 (en)

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