Motion picture encoding device and motion picture decoding device
AssigneeFujitsu Limited
InventorsAkira NAKAGAWA, Hidenobu MIYOSHI
Life of this patent
Estimating the term…
Abstract
When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.
Claims12
A motion picture encoding method for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding method comprising:
- generating a chrominance motion vector from a luminance motion vector by using a calculation represented as
- MVCy=MVy+2
- when a reference field is a top field and a coding field is a bottom field, wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
A motion picture encoding device for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding device comprising:
- an encoder configured to generate a chrominance motion vector from a luminance motion vector by using a calculation represented as
- MVCy=MVy+2
- when a reference field is a top field and a coding field is a bottom field, wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
A motion picture encoding method for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding method comprising:
- generating a chrominance motion vector from a luminance motion vector by using a calculation represented as
- MVCy=MVy−2
- when a reference field is a bottom field and a coding field is a top field, wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
A motion picture encoding device for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding device comprising:
- an encoder configured to generate a chrominance motion vector from a luminance motion vector by using a calculation represented as
- MVCy=MVy−2
- when a reference field is a bottom field and a coding field is a top field, wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
A motion picture encoding method for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding method comprising:
- generating a chrominance motion vector from a luminance motion vector depending on whether each of a reference field and a coding field is a top field or a bottom field
- by using a calculation represented as
- MVCy=MVy
- when both the reference and coding fields are the top fields or are the bottom fields,
- by using a calculation represented as
- MVCy=Mvy+2
- when the reference field is a top field and the coding field is a bottom field, and
- by using a calculation represented as
- MVCy=MVy−2
- when the reference field is a bottom field and the coding field is a top field,
- wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
A motion picture encoding device for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding device comprising:
- an encoder configured to determine whether each of a reference field and a coding field is a top field or a bottom field, and configured to generate a chrominance motion vector from a luminance motion vector
- by using a calculation represented as
- MVCy=MVy
- when both the reference and coding fields are the top fields or are the bottom fields,
- by using a calculation represented as
- MVCy=MVy+2
- when the reference field is a top field and the coding field is a bottom field, and
- by using a calculation represented as
- MVCy=MVy−2
- when the reference field is a bottom field and the coding field is a top field,
- wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.
Dependencies are inferred from the claim text.