WO2000070877A3 - Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams - Google Patents

Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams Download PDF

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Publication number
WO2000070877A3
WO2000070877A3 PCT/US2000/003870 US0003870W WO0070877A3 WO 2000070877 A3 WO2000070877 A3 WO 2000070877A3 US 0003870 W US0003870 W US 0003870W WO 0070877 A3 WO0070877 A3 WO 0070877A3
Authority
WO
WIPO (PCT)
Prior art keywords
bitstreams
luma
bitstream
chroma data
converting
Prior art date
Application number
PCT/US2000/003870
Other languages
French (fr)
Other versions
WO2000070877A2 (en
Inventor
Xuemin Chen
Limin Wang
Ajay Luthra
Robert O Eifrig
Original Assignee
Gen Instrument Corp
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 Gen Instrument Corp filed Critical Gen Instrument Corp
Priority to EP00963249A priority Critical patent/EP1153512A2/en
Priority to CA2364478A priority patent/CA2364478C/en
Priority to AU74691/00A priority patent/AU7469100A/en
Priority to KR1020017010469A priority patent/KR100934290B1/en
Publication of WO2000070877A2 publication Critical patent/WO2000070877A2/en
Publication of WO2000070877A3 publication Critical patent/WO2000070877A3/en

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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
    • H04N19/186—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 a colour or a chrominance component
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/04—Colour television systems using pulse code modulation
    • 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
    • H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals

Abstract

A system for converting the color format of a digital video bitstream. The system accounts for the allowable formats of the pre- and post-conversion bitstreams, including quantizer (355) precision level, and whether luma and chroma data have separate quantization matrices (385, 390), or share a common quantization matrix. In a particular implementation, an MPEG-2 4:2:2P bitstream having a color format of 4:2:2 or 4:2:0 is converted to an MP bitstream having a color format of 4:2:0. Coding efficiencies are achieved by using the luma quantization matrix (390) to re-quantize the chroma data, and re-using luma motion vectors MV for performing motion compensation (320, 325, 510) of the chroma data. Further efficiencies can be achieved by representing a 4:2:2 reference picture in a 4:2:0 format for converting intercoded frames, and changing the position of a pixel downsizing filter (340) and clip function (335). Adjustment (130, 230, 382), of the quantization precision is provided as required. A transcoding function (800) can also be achieved.
PCT/US2000/003870 1999-02-18 2000-02-16 Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams WO2000070877A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00963249A EP1153512A2 (en) 1999-02-18 2000-02-16 Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams
CA2364478A CA2364478C (en) 1999-02-18 2000-02-16 Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams
AU74691/00A AU7469100A (en) 1999-02-18 2000-02-16 Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams
KR1020017010469A KR100934290B1 (en) 1999-02-18 2000-02-16 MPEG-2 4: 2: 2-Method and Architecture for Converting a Profile Bitstream to a Main-Profile Bitstream

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/252,135 1999-02-18
US09/252,135 US6259741B1 (en) 1999-02-18 1999-02-18 Method of architecture for converting MPEG-2 4:2:2-profile bitstreams into main-profile bitstreams

Publications (2)

Publication Number Publication Date
WO2000070877A2 WO2000070877A2 (en) 2000-11-23
WO2000070877A3 true WO2000070877A3 (en) 2001-06-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/003870 WO2000070877A2 (en) 1999-02-18 2000-02-16 Method and architecture for converting mpeg-2 4:2:2-profile bitstreams into main-profile bitstreams

Country Status (8)

Country Link
US (1) US6259741B1 (en)
EP (1) EP1153512A2 (en)
KR (1) KR100934290B1 (en)
CN (1) CN1347620A (en)
AU (1) AU7469100A (en)
CA (1) CA2364478C (en)
TW (1) TW545057B (en)
WO (1) WO2000070877A2 (en)

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Also Published As

Publication number Publication date
CA2364478C (en) 2011-07-05
KR100934290B1 (en) 2009-12-29
AU7469100A (en) 2000-12-05
EP1153512A2 (en) 2001-11-14
TW545057B (en) 2003-08-01
KR20010102228A (en) 2001-11-15
CN1347620A (en) 2002-05-01
CA2364478A1 (en) 2000-11-23
WO2000070877A2 (en) 2000-11-23
US6259741B1 (en) 2001-07-10

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