CA2475777A1 - A recording medium containing positive and negative rounding information related to coded data of an image sequence - Google Patents

A recording medium containing positive and negative rounding information related to coded data of an image sequence Download PDF

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Publication number
CA2475777A1
CA2475777A1 CA002475777A CA2475777A CA2475777A1 CA 2475777 A1 CA2475777 A1 CA 2475777A1 CA 002475777 A CA002475777 A CA 002475777A CA 2475777 A CA2475777 A CA 2475777A CA 2475777 A1 CA2475777 A1 CA 2475777A1
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CA
Canada
Prior art keywords
information related
rounding method
image sequence
image
coded data
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.)
Granted
Application number
CA002475777A
Other languages
French (fr)
Other versions
CA2475777C (en
Inventor
Yuichiro Nakaya
Yoshito Nejime
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd.
Yuichiro Nakaya
Yoshito Nejime
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 Hitachi Ltd., Yuichiro Nakaya, Yoshito Nejime filed Critical Hitachi Ltd.
Priority claimed from CA 2240118 external-priority patent/CA2240118C/en
Publication of CA2475777A1 publication Critical patent/CA2475777A1/en
Application granted granted Critical
Publication of CA2475777C publication Critical patent/CA2475777C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The present invention relates to a recording medium having recorded thereon information related to coded data of an image sequence. The information related to coded data of an image sequence is a set of coded frame information of a plurality of frames of an image sequence. The coded frame information includes information related to a difference image between an image of a current frame and a prediction image of the current frame. The prediction image is synthesized by performing motion compensation, information related to motion vectors estimated in performing the motion compensation, and rounding method information specifying either a positive rounding method or a negative rounding method for interpolating intensity values of pixels in performing the motion compensation. The information specifying either a positive rounding method or a negative rounding method for interpolating intensity values of pixels enables a decoder to synthesize a prediction image of the current frame by performing motion compensation according to the specified rounding method at the time of decoding the encoded data.
CA 2475777 1997-06-09 1998-06-08 A recording medium containing positive and negative rounding information related to coded data of an image sequence Expired - Fee Related CA2475777C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP15065697 1997-06-09
JP9-150656 1997-06-09
CA 2240118 CA2240118C (en) 1997-06-09 1998-06-08 Image sequence coding method and decoding method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA 2240118 Division CA2240118C (en) 1997-06-09 1998-06-08 Image sequence coding method and decoding method

Publications (2)

Publication Number Publication Date
CA2475777A1 true CA2475777A1 (en) 1998-12-09
CA2475777C CA2475777C (en) 2005-10-04

Family

ID=25680294

Family Applications (4)

Application Number Title Priority Date Filing Date
CA 2318677 Expired - Fee Related CA2318677C (en) 1997-06-09 1998-06-08 Method and apparatus for image decoding
CA 2475777 Expired - Fee Related CA2475777C (en) 1997-06-09 1998-06-08 A recording medium containing positive and negative rounding information related to coded data of an image sequence
CA 2475779 Expired - Fee Related CA2475779C (en) 1997-06-09 1998-06-08 Digital portable terminal and method using positive and negative rounding for pixel value interpolation in motion compensation
CA 2475778 Expired - Fee Related CA2475778C (en) 1997-06-09 1998-06-08 An image coding method and encoder using positive and negative rounding methods while performing motion compensation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA 2318677 Expired - Fee Related CA2318677C (en) 1997-06-09 1998-06-08 Method and apparatus for image decoding

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA 2475779 Expired - Fee Related CA2475779C (en) 1997-06-09 1998-06-08 Digital portable terminal and method using positive and negative rounding for pixel value interpolation in motion compensation
CA 2475778 Expired - Fee Related CA2475778C (en) 1997-06-09 1998-06-08 An image coding method and encoder using positive and negative rounding methods while performing motion compensation

Country Status (1)

Country Link
CA (4) CA2318677C (en)

Also Published As

Publication number Publication date
CA2475778A1 (en) 1998-12-09
CA2475779C (en) 2005-10-25
CA2475777C (en) 2005-10-04
CA2318677C (en) 2002-04-16
CA2475779A1 (en) 1998-12-09
CA2475778C (en) 2005-10-04
CA2318677A1 (en) 1998-12-09

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