BR0015341A - Compressão de imagem dct de tamanho de bloco adaptável baseado na variância - Google Patents

Compressão de imagem dct de tamanho de bloco adaptável baseado na variância

Info

Publication number
BR0015341A
BR0015341A BR0015341-9A BR0015341A BR0015341A BR 0015341 A BR0015341 A BR 0015341A BR 0015341 A BR0015341 A BR 0015341A BR 0015341 A BR0015341 A BR 0015341A
Authority
BR
Brazil
Prior art keywords
image compression
block
blocks
block size
variance
Prior art date
Application number
BR0015341-9A
Other languages
English (en)
Other versions
BR0015341B1 (pt
Inventor
Kadayam Thyagarajan
Michael J Merritt
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0015341A publication Critical patent/BR0015341A/pt
Publication of BR0015341B1 publication Critical patent/BR0015341B1/pt

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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/96—Tree coding, e.g. quad-tree 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
    • H04N19/10—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
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • H04N19/122—Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (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)

Abstract

"COMPRESSãO DE IMAGEM DCT DE TAMANHO DE BLOCO ADAPTáVEL BASEADO NA VARIâNCIA". São apresentados um sistema e um método para compressão de imagem utilizando blocos e sub-blocos de dados de coeficiente de transformada de coseno discreta dimensionados de forma adaptável. Um elemento designador de tamanho de bloco no codificador seleciona o bloco ou sub-bloco de um bloco de alimentação de pixels a ser processado. A seleção se baseia na variância dos valores de pixel. Os blocos com variâncias maiores que um limite são subdivididos, enquanto que blocos com variâncias menores que um limite não são subdivididos. Um elemento transformador transforma os valores de pixel dos blocos selecionados para o domínio da freq³ência. Os valores do domínio da freq³ência podem a seguir ser quantificados, serializados e codificados com comprimentos variáveis em preparação para a transmissão.
BRPI0015341-9A 1999-11-08 2000-11-08 “método para determinar uma designação de tamanho de bloco para um bloco de entrada de pixels de imagem a ser usada na compressão do bloco de entrada, sistema de compressão de imagens para comprimir um bloco de dados de pixels, método e sistema para compressão de um bloco de dados de pixels de uma imagem, bem como, meio legível por computador”. BR0015341B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/436,085 US6529634B1 (en) 1999-11-08 1999-11-08 Contrast sensitive variance based adaptive block size DCT image compression
US09/436,085 1999-11-08
PCT/US2000/030883 WO2001035673A1 (en) 1999-11-08 2000-11-08 Variance based adaptive block size dct image compression

Publications (2)

Publication Number Publication Date
BR0015341A true BR0015341A (pt) 2003-07-15
BR0015341B1 BR0015341B1 (pt) 2015-01-06

Family

ID=23731055

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0015341-9A BR0015341B1 (pt) 1999-11-08 2000-11-08 “método para determinar uma designação de tamanho de bloco para um bloco de entrada de pixels de imagem a ser usada na compressão do bloco de entrada, sistema de compressão de imagens para comprimir um bloco de dados de pixels, método e sistema para compressão de um bloco de dados de pixels de uma imagem, bem como, meio legível por computador”.

Country Status (18)

Country Link
US (1) US6529634B1 (pt)
EP (1) EP1230804B1 (pt)
JP (2) JP5289659B2 (pt)
KR (1) KR100740818B1 (pt)
CN (1) CN1186942C (pt)
AR (1) AR033655A1 (pt)
AT (1) ATE538598T1 (pt)
AU (1) AU782176B2 (pt)
BR (1) BR0015341B1 (pt)
CA (1) CA2389410C (pt)
ES (1) ES2376540T3 (pt)
HK (1) HK1053565A1 (pt)
IL (2) IL149455A0 (pt)
MX (1) MXPA02004577A (pt)
RU (1) RU2273112C2 (pt)
TW (1) TW517500B (pt)
WO (1) WO2001035673A1 (pt)
ZA (1) ZA200203276B (pt)

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Also Published As

Publication number Publication date
KR20030036129A (ko) 2003-05-09
AU782176B2 (en) 2005-07-07
WO2001035673A1 (en) 2001-05-17
CN1186942C (zh) 2005-01-26
HK1053565A1 (en) 2003-10-24
AU1481101A (en) 2001-06-06
CA2389410A1 (en) 2001-05-17
KR100740818B1 (ko) 2007-07-19
IL149455A (en) 2007-07-04
JP2003523652A (ja) 2003-08-05
TW517500B (en) 2003-01-11
AR033655A1 (es) 2004-01-07
CA2389410C (en) 2011-06-28
CN1421102A (zh) 2003-05-28
ES2376540T3 (es) 2012-03-14
JP2012199963A (ja) 2012-10-18
MXPA02004577A (es) 2002-11-29
ATE538598T1 (de) 2012-01-15
EP1230804A1 (en) 2002-08-14
BR0015341B1 (pt) 2015-01-06
ZA200203276B (en) 2003-07-24
IL149455A0 (en) 2002-11-10
JP5289659B2 (ja) 2013-09-11
JP5384696B2 (ja) 2014-01-08
RU2273112C2 (ru) 2006-03-27
US6529634B1 (en) 2003-03-04
EP1230804B1 (en) 2011-12-21

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