WO2012115486A3 - 영상의 변환 방법 및 장치, 및 영상의 역변환 방법 및 장치 - Google Patents

영상의 변환 방법 및 장치, 및 영상의 역변환 방법 및 장치 Download PDF

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Publication number
WO2012115486A3
WO2012115486A3 PCT/KR2012/001446 KR2012001446W WO2012115486A3 WO 2012115486 A3 WO2012115486 A3 WO 2012115486A3 KR 2012001446 W KR2012001446 W KR 2012001446W WO 2012115486 A3 WO2012115486 A3 WO 2012115486A3
Authority
WO
WIPO (PCT)
Prior art keywords
image
converting
discrete cosine
cosine transform
inverse conversion
Prior art date
Application number
PCT/KR2012/001446
Other languages
English (en)
French (fr)
Other versions
WO2012115486A2 (ko
Inventor
이태미
김일구
한우진
천지엔러
Original Assignee
삼성전자 주식회사
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 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to US14/001,618 priority Critical patent/US20140072240A1/en
Publication of WO2012115486A2 publication Critical patent/WO2012115486A2/ko
Publication of WO2012115486A3 publication Critical patent/WO2012115486A3/ko

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/007—Transform coding, e.g. discrete cosine transform
    • 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
    • H04N19/60—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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • 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
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H04N19/619—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding the transform being operated outside the prediction loop

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

Abstract

영상의 변환/역변환 방법 및 장치가 개시된다. 본 발명의 일 실시예에 따른 영상 변환 방법은 이산 코사인 변환에 이용되는 변환 행렬의 원소들 중 삼각함수에 기초한 값들을 소정의 유리수 값들로 치환하고, 치환된 이산 코사인 변환 행렬을 이용하여 이산 코사인 변환을 수행할 때, 변환 과정에서 발생되는 중간값의 분모의 최대값에 기초하여 입력 신호를 업스케일링 및 변환하며, 변환된 신호를 다운스케일링한다.
PCT/KR2012/001446 2011-02-25 2012-02-24 영상의 변환 방법 및 장치, 및 영상의 역변환 방법 및 장치 WO2012115486A2 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/001,618 US20140072240A1 (en) 2011-02-25 2012-02-24 Method and apparatus for converting an image, and method and apparatus for inverse converting an image

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161446753P 2011-02-25 2011-02-25
US61/446,753 2011-02-25

Publications (2)

Publication Number Publication Date
WO2012115486A2 WO2012115486A2 (ko) 2012-08-30
WO2012115486A3 true WO2012115486A3 (ko) 2012-11-15

Family

ID=46721366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/001446 WO2012115486A2 (ko) 2011-02-25 2012-02-24 영상의 변환 방법 및 장치, 및 영상의 역변환 방법 및 장치

Country Status (3)

Country Link
US (1) US20140072240A1 (ko)
KR (1) KR20120098499A (ko)
WO (1) WO2012115486A2 (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108200439B (zh) 2013-06-14 2020-08-21 浙江大学 提高数字信号变换性能的方法及数字信号变换方法和装置
KR101527103B1 (ko) * 2013-10-30 2015-06-17 고려대학교 산학협력단 이산 코사인 변환 장치 및 방법
KR20160104646A (ko) 2013-12-22 2016-09-05 엘지전자 주식회사 양자화 에러의 추가적인 제어를 이용한 비디오 신호의 인코딩, 디코딩 방법 및 장치
FR3033114A1 (fr) * 2015-02-19 2016-08-26 Orange Procede de codage et decodage d'images, dispositif de codage et decodage et programmes d'ordinateur correspondants
WO2016187529A1 (en) * 2015-05-20 2016-11-24 Paul Rad Systems and methods for secure file transmission and cloud storage
JP2018533284A (ja) * 2015-09-21 2018-11-08 エルジー エレクトロニクス インコーポレイティド 係数誘導予測を用いてビデオ信号を処理する方法及び装置
US20210195241A1 (en) * 2016-02-01 2021-06-24 Lg Electronics Inc. Method and device for performing transform using row-column transforms
US10542277B2 (en) * 2017-10-24 2020-01-21 Arm Limited Video encoding
TWI800765B (zh) * 2020-11-06 2023-05-01 瑞昱半導體股份有限公司 影像處理方法及影像處理系統
CN114239037B (zh) * 2021-12-27 2024-06-04 中国矿业大学 基于沙路法则的多图像加密方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007503784A (ja) * 2003-05-20 2007-02-22 アーエムテー アドバンスド マルチメディア テクノロジー アクティエボラーグ ハイブリッドビデオ圧縮法
WO2008002881A2 (en) * 2006-06-26 2008-01-03 Qualcomm Incorporated Reduction of errors during computation of inverse discrete cosine transform
KR20080093302A (ko) * 2007-04-16 2008-10-21 경희대학교 산학협력단 고속 동작을 위한 ｍｐｅｇ２／ｈ．２６４ 디지털 비디오트랜스코딩 시스템 및 방법

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US7082450B2 (en) * 2001-08-30 2006-07-25 Nokia Corporation Implementation of a transform and of a subsequent quantization
US7379956B2 (en) * 2002-07-14 2008-05-27 Apple Inc. Encoding and decoding data arrays
US8069201B2 (en) * 2003-11-25 2011-11-29 Texas Instruments Incorporated 8×8 transform and quantization
US7689052B2 (en) * 2005-10-07 2010-03-30 Microsoft Corporation Multimedia signal processing using fixed-point approximations of linear transforms
US20070271321A1 (en) * 2006-01-11 2007-11-22 Qualcomm, Inc. Transforms with reduce complexity and/or improve precision by means of common factors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007503784A (ja) * 2003-05-20 2007-02-22 アーエムテー アドバンスド マルチメディア テクノロジー アクティエボラーグ ハイブリッドビデオ圧縮法
WO2008002881A2 (en) * 2006-06-26 2008-01-03 Qualcomm Incorporated Reduction of errors during computation of inverse discrete cosine transform
KR20080093302A (ko) * 2007-04-16 2008-10-21 경희대학교 산학협력단 고속 동작을 위한 ｍｐｅｇ２／ｈ．２６４ 디지털 비디오트랜스코딩 시스템 및 방법

Also Published As

Publication number Publication date
KR20120098499A (ko) 2012-09-05
US20140072240A1 (en) 2014-03-13
WO2012115486A2 (ko) 2012-08-30

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