Reference picture selection method and apparatus
AssigneePanasonic Corporation
InventorsViktor Wahadaniah, Chong Soon Lim, Youji Shibahara, Shinya Kadono
Life of this patent
Estimating the term…
Abstract
The reference picture selection method according to the present invention is a method for selecting a reference picture for a current bottom field, and includes: predicting a degree of a motion of the current bottom field using a specific field which precedes the current bottom field in coding order; setting reference picture candidates suitable for coding the current bottom field based on the predicted degree of motion; and selecting a reference picture of the current bottom field among the set reference picture candidates.
Claims19
A reference picture selection method for selecting a reference picture for a current bottom field to be coded when coding interlaced video, said method comprising:
- predicting a degree of motion of the current bottom field using a specific field which precedes the current bottom field in coding order;
- setting reference picture candidates suitable for the coding of the current bottom field, according to the predicted degree of motion;
- and
- selecting a reference picture for the current bottom field, from among the set reference picture candidates.
An image coding apparatus which codes interlaced video, said image coding apparatus comprising:
- a predicting unit operable to predict a degree of motion of the current bottom field using a specific field which precedes the current bottom field in coding order;
- a setting unit operable to set reference picture candidates suitable for coding the current bottom field according to the predicted degree of motion;
- a selecting unit operable to select a reference picture of the current bottom field from among the set reference picture candidates;
- and
- a coding unit operable to code a current bottom field using the selected reference picture.
A semiconductor device which codes interlaced video, said semiconductor device comprising:
- a predicting unit operable to predict a degree of motion of the current bottom field using a specific field which precedes the current bottom field in coding order;
- a setting unit operable to set reference picture candidates suitable for coding the current bottom field according to the predicted degree of motion;
- and
- a selecting unit operable to select a reference picture of the current bottom field from among the set reference picture candidates;
- and
- a coding unit operable to code a current bottom field using the selected reference picture.
Computer-readable stream data which represents coded interlaced video, said stream data comprising:
- a code which represents a top field and a code which represents a bottom field, the top field and the bottom field being in a field pair,
- index information which indicates reference indices which are respectively assigned to pictures to which the bottom field can refer,
- wherein a reference index of the least bit out of the reference indices for a bottom field which can refer to a picture coded in bi-predictive inter picture coding is always allocated to one of a temporally nearest field and a spatially nearest field,
- the temporally nearest field is a top field in the same field pair as the current field, and
- the spatially nearest field is a bottom field in a field pair which is immediately previous to the current field in coding order, the field pair being coded in bi-predictive coding.
Dependencies are inferred from the claim text.