WO2008046622A3 - Verfahren und vorrichtung zur vermeidung von rundungsfehlern nach durchführung einer inversen diskreten kosinus-transformation - Google Patents

Verfahren und vorrichtung zur vermeidung von rundungsfehlern nach durchführung einer inversen diskreten kosinus-transformation Download PDF

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Publication number
WO2008046622A3
WO2008046622A3 PCT/EP2007/009046 EP2007009046W WO2008046622A3 WO 2008046622 A3 WO2008046622 A3 WO 2008046622A3 EP 2007009046 W EP2007009046 W EP 2007009046W WO 2008046622 A3 WO2008046622 A3 WO 2008046622A3
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WO
WIPO (PCT)
Prior art keywords
block
values
discrete cosine
inverse discrete
cosine transformation
Prior art date
Application number
PCT/EP2007/009046
Other languages
English (en)
French (fr)
Other versions
WO2008046622A2 (de
Inventor
Thomas Sikora
Original Assignee
Ods Technology Gmbh
Thomas Sikora
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 Ods Technology Gmbh, Thomas Sikora filed Critical Ods Technology Gmbh
Priority to EP07819111A priority Critical patent/EP2090109A2/de
Priority to US12/443,163 priority patent/US20090198757A1/en
Publication of WO2008046622A2 publication Critical patent/WO2008046622A2/de
Publication of WO2008046622A3 publication Critical patent/WO2008046622A3/de

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/147—Discrete orthonormal transforms, e.g. discrete cosine transform, discrete sine transform, and variations therefrom, e.g. modified discrete cosine transform, integer transforms approximating the discrete cosine transform
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
    • 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
    • H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
    • H04N19/45—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder performing compensation of the inverse transform mismatch, e.g. Inverse Discrete Cosine Transform [IDCT] mismatch
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Discrete Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Algebra (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Complex Calculations (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Die vorliegende Erfindung stellt ein Verfahren zur Vermeidung von Rundungsfehlern beim Runden von Werten nach Durchführung einer inversen diskreten Kosinus-Transformation bereit. In einem ersten Schritt a) werden die Koeffizientenwerten von einer Mehrzahl von Koeffizienten aufsummiert, wobei die Koeffizienten zu einem Block von Koeffizienten gehören. In einem zweiten Schritt b) wird beurteilt, ob die Summe der Koeffizientenwerte geradzahlig oder ungeradzahlig ist. In einem dritten Schritt c) wird dann der Koeffizientenblock mittels der inversen diskreten Kosinus-Transformation in einen Block von Bildpunkten transformiert, wobei jeder Bildpunkt einen Bildpunktwert aufweist. In einem vierten Schritt d) wird, wenn die Beurteilung der Summe der Koeffizientenwerte ergeben hat, dass die Summe geradzahlig ist, ein Block von Manipulationswerten zu den Bildpunktwerten des Blocks von Bildpunkten addiert oder subtrahiert zum Erzeugen eines manipulierten Bildpunktblocks, wobei der Manipulationswerteblock derart aufgebaut ist, dass Rundungsfehler bei einer nachfolgenden Rundungsoperation vermieden werden.
PCT/EP2007/009046 2006-10-18 2007-10-18 Verfahren und vorrichtung zur vermeidung von rundungsfehlern nach durchführung einer inversen diskreten kosinus-transformation WO2008046622A2 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07819111A EP2090109A2 (de) 2006-10-18 2007-10-18 Verfahren und vorrichtung zur vermeidung von rundungsfehlern nach durchführung einer inversen diskreten kosinus-transformation
US12/443,163 US20090198757A1 (en) 2006-10-18 2007-10-18 Method and device for avoiding rounding errors after performing an inverse discrete cosine transformation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006049232A DE102006049232B4 (de) 2006-10-18 2006-10-18 Verfahren und Vorrichtung zur Vermeidung von Fehlern beim Runden von Werten nach Durchführung einer inversen diskreten Kosinus-Transformation
DE102006049232.3 2006-10-18

Publications (2)

Publication Number Publication Date
WO2008046622A2 WO2008046622A2 (de) 2008-04-24
WO2008046622A3 true WO2008046622A3 (de) 2008-06-05

Family

ID=39204802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/009046 WO2008046622A2 (de) 2006-10-18 2007-10-18 Verfahren und vorrichtung zur vermeidung von rundungsfehlern nach durchführung einer inversen diskreten kosinus-transformation

Country Status (4)

Country Link
US (1) US20090198757A1 (de)
EP (1) EP2090109A2 (de)
DE (1) DE102006049232B4 (de)
WO (1) WO2008046622A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2222086A1 (de) * 2009-02-18 2010-08-25 EcoDisc Technology AG Verfahren und Vorrichtung zur Vermeidung von Rundungsfehlern nach Durchführung einer inversen diskreten orthogonalen Transformation
EP2813078A4 (de) * 2012-02-06 2015-09-30 Nokia Technologies Oy Verfahren zur kodierung und vorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021083A1 (en) * 1993-03-01 1994-09-15 Sony Corporation Methods and apparatus for preventing rounding errors when transform coefficients representing a motion picture signal are inversely transformed
EP0784410A2 (de) * 1996-01-11 1997-07-16 Tektronix, Inc. Verarbeitung von Bildkodiertendaten
EP1143738A2 (de) * 2000-03-29 2001-10-10 Matsushita Electric Industrial Co., Ltd. DCT-Bereichabwärtsumsetzungssystem mit IDCT-Mismatchkompensation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6377627B1 (en) * 1999-08-31 2002-04-23 Sony Corporation Method and apparatus for decoding MPEG video data
US6940912B2 (en) * 2000-04-21 2005-09-06 Microsoft Corporation Dynamically adaptive multimedia application program interface and related methods
US7689052B2 (en) * 2005-10-07 2010-03-30 Microsoft Corporation Multimedia signal processing using fixed-point approximations of linear transforms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021083A1 (en) * 1993-03-01 1994-09-15 Sony Corporation Methods and apparatus for preventing rounding errors when transform coefficients representing a motion picture signal are inversely transformed
EP0784410A2 (de) * 1996-01-11 1997-07-16 Tektronix, Inc. Verarbeitung von Bildkodiertendaten
EP1143738A2 (de) * 2000-03-29 2001-10-10 Matsushita Electric Industrial Co., Ltd. DCT-Bereichabwärtsumsetzungssystem mit IDCT-Mismatchkompensation

Also Published As

Publication number Publication date
DE102006049232B4 (de) 2010-02-04
DE102006049232A1 (de) 2008-05-08
WO2008046622A2 (de) 2008-04-24
EP2090109A2 (de) 2009-08-19
US20090198757A1 (en) 2009-08-06

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