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US 2007/0165721 A1Published application
Motion picture encoding device and motion picture decoding device
AssigneeFujitsu Limited
InventorsAkira Nakagawa, Hidenobu Miyoshi
Life of this patent
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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 a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.
Claims8
A method for encoding motion picture data including frames each of which is composed of a top field and a bottom field, comprising:
- generating a chrominance motion vector having a corrected vertical component of a luminance motion vector as the chrominance motion vector's own vertical component when a reference field and a encoding field of a motion vector for the frames are a top field and a bottom field, respectively, or a bottom field and a top field, respectively.
An apparatus for encoding motion picture data including frames each of which is composed of a top field and a bottom field, comprising:
- a chrominance motion vector generator generating a chrominance motion vector having a corrected vertical component of a luminance motion vector as the chrominance motion vector's own vertical component when a reference field and a encoding field of a motion vector for the frames are a top field and a bottom field, respectively, or a bottom field and a top field, respectively.
Dependencies are inferred from the claim text.