EP2208352A2 - Festkommaimplementierung eines adaptiven bildfilters mit hoher codierungseffizienz - Google Patents

Festkommaimplementierung eines adaptiven bildfilters mit hoher codierungseffizienz

Info

Publication number
EP2208352A2
EP2208352A2 EP08807224A EP08807224A EP2208352A2 EP 2208352 A2 EP2208352 A2 EP 2208352A2 EP 08807224 A EP08807224 A EP 08807224A EP 08807224 A EP08807224 A EP 08807224A EP 2208352 A2 EP2208352 A2 EP 2208352A2
Authority
EP
European Patent Office
Prior art keywords
sum
multiple partial
sums
partial convolution
convolution
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP08807224A
Other languages
English (en)
French (fr)
Inventor
Kemal Ugur
Antti Olli Hallapuro
Dmytro Rusanovskyy
Jani Lainema
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
Original Assignee
Nokia Oyj
Nokia 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
Priority claimed from US11/872,024 external-priority patent/US20090097545A1/en
Application filed by Nokia Oyj, Nokia Inc filed Critical Nokia Oyj
Publication of EP2208352A2 publication Critical patent/EP2208352A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
    • 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
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • H04N19/82—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation involving filtering within a prediction loop

Definitions

  • FIGURE 8 is a block diagram of an exemplary implementation of an adaptive filter according to an embodiment of the present invention
  • FIGURE 9 is a block diagram of an exemplary implementation of an adaptive filter according to another embodiment of the present invention.
  • Figure 7 is a block diagram of an exemplary implementation of a conversion of floating-point filter coefficients to integer filter coefficients.
  • an estimator 510 may generate floating-point filter coefficients Co', Ci', ..., C 5 '.
  • the floating-point to integer value converter 520 may scale the floating-point coefficients by 2 N , left shifting by N.
  • the integer value filter coefficients are equal to the integer part of the scaled, or left shifted, floating-point coefficients.
  • a plurality of converters 520 is shown, in an alternative embodiment the same converter may be used to convert more than one floating-point filter coefficient to integer filter coefficients.
  • the precision index may be 7 whereas if filter coefficients are in a range [-0.5, 0.5] then the precision index may be 8.
  • Other implementations may also use different ways to decide on the value of N for different interpolation points.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Complex Calculations (AREA)
EP08807224A 2007-10-14 2008-10-13 Festkommaimplementierung eines adaptiven bildfilters mit hoher codierungseffizienz Withdrawn EP2208352A2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/872,024 US20090097545A1 (en) 2007-10-14 2007-10-14 Fixed-Point Implementation of an Adaptive Image Filter with High Coding Efficiency
US1965908P 2008-01-08 2008-01-08
PCT/IB2008/002709 WO2009050557A2 (en) 2007-10-14 2008-10-13 Fixed-point implementation of an adaptive image filter with high coding efficiency

Publications (1)

Publication Number Publication Date
EP2208352A2 true EP2208352A2 (de) 2010-07-21

Family

ID=40344364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08807224A Withdrawn EP2208352A2 (de) 2007-10-14 2008-10-13 Festkommaimplementierung eines adaptiven bildfilters mit hoher codierungseffizienz

Country Status (6)

Country Link
EP (1) EP2208352A2 (de)
KR (1) KR20100074272A (de)
CN (1) CN101878648A (de)
MX (1) MX2010004071A (de)
RU (1) RU2010119176A (de)
WO (1) WO2009050557A2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102469310B (zh) * 2010-11-19 2015-02-04 深圳市云宙多媒体技术有限公司 一种亚像素插值方法及系统
US20140198840A1 (en) * 2011-08-31 2014-07-17 New Motech Co., Ltd. Method and apparatus for adaptive loop filter with constrained filter coefficients
SE538512C2 (sv) * 2014-11-26 2016-08-30 Kelicomp Ab Improved compression and encryption of a file
CN113965765A (zh) 2018-03-09 2022-01-21 华为技术有限公司 使用自适应乘数系数进行图像滤波的方法及装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474226A3 (en) * 1990-09-06 1993-01-20 Matsushita Electric Industrial Co., Ltd. Digitial filter composing apparatus and digital filter composing method therefor
EP0644684B1 (de) * 1993-09-17 2000-02-02 Eastman Kodak Company Digitaler integrierter Abtastratenumwandlungsschaltkreis und Anwendung bei einer schnellen Grössenänderung eines Bildes
US5729483A (en) * 1995-11-14 1998-03-17 Advanced Micro Devices Implementation of a digital interpolation filter and method
GB2373661B (en) * 2001-03-23 2005-05-11 Advanced Risc Mach Ltd A data processing apparatus and method for performing an adaptive filter operation on an input data sample
TW200501565A (en) * 2003-05-15 2005-01-01 Neuro Solution Corp Digital filter and design method, design apparatus, and digital filter design program thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009050557A3 *

Also Published As

Publication number Publication date
WO2009050557A2 (en) 2009-04-23
RU2010119176A (ru) 2011-11-20
KR20100074272A (ko) 2010-07-01
MX2010004071A (es) 2010-06-01
CN101878648A (zh) 2010-11-03
WO2009050557A3 (en) 2009-06-11

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