JP2008236805A - 動きベクトル及びレファレンスピクチャインデックスの決定方法 - Google Patents
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Abstract
【解決手段】コーディングしようとするピクチャの現ブロックに関する動きベクトル及びレファレンスピクチャインデックスの決定方法であって、現ブロックの周辺ブロックであって、現ブロック以外の他のブロックの第1及び第2動きベクトル並びにレファレンスピクチャインデックスを求める段階と、他のブロックの第1及び第2動きベクトルを用いて、現ブロックの第1及び第2動きベクトルを決定する段階であって、他のブロックの第1動きベクトル及び他のブロックの第2動きベクトルに対してメディアン演算を行なう段階を含む段階と、レファレンスピクチャインデックスに基づいてレファレンスピクチャの方向を決定する段階と、を有することを特徴とする。
【選択図】図1
Description
PMV=median{MVA,MVB,MVC}
以下、添付図面を参照しつつ本発明による実施例を詳細に説明する。
まず、コーディングしようとするブロックの予測動きベクトル‘PMV’を求めるには、周辺ブロックの動きベクトルに対する方向情報を把握しなければならない。そして、各ブロックの動きベクトルに対する方向情報に基づいて、メディアン演算に該当周辺ブロックの動きベクトルを含ませるか否か決定する。
コーディングしようとするブロックの周辺ブロックが双予測モードまたはダイレクトモードであれば二つの動きベクトルを有することになり、このうちコーディングしようとするブロックに対して演算しようとする予測動きベクトル‘PMV’と同一の方向を有する動きベクトルがメディアン演算に使用されるべきである。本発明で提示する効率的な予測動きベクトル‘PMV’演算方法を、次に詳細に説明する。このとき、図1に示すと同様に、コーディングしようとするブロックをE、周辺ブロックをA、B、C、Dとし、周辺ブロックの二つの動きベクトルをそれぞれMV1、MV2と設定する。
コーディングしようとするブロック(例えば、E)に対して、求めようとする予測動きベクトル‘PMV’と(各周辺ブロックA、B、CまたはA、B、Dの動きベクトルの中で)同一の方向の動きベクトルを選択した後、メディアン演算を通じて予測動きベクトル‘PMV’を求める。
まず、コーディングしようとするブロックEが参照するレファレンスピクチャを、周辺ブロックの二つの動きベクトルが参照しているか検査する。
‘MV1’と‘MV2’とを有する周辺ブロックの動きベクトルを‘0’と設定した後、レファレンスピクチャを、ブロックEが参照するレファレンスピクチャと異なると設定し、メディアン演算に含ませてコーディングしようとするブロックの予測動きベクトル‘PMV’を求める。
Claims (5)
- コーディングしようとするピクチャの現ブロックに関する動きベクトル及びレファレンスピクチャインデックスの決定方法であって、
前記現ブロックの周辺ブロックであって、前記現ブロック以外の他のブロックの第1及び第2動きベクトル並びにレファレンスピクチャインデックスを求める段階と、
前記他のブロックの第1及び第2動きベクトルを用いて、前記現ブロックの第1及び第2動きベクトルを決定する段階であって、前記他のブロックの第1動きベクトル及び前記他のブロックの第2動きベクトルに対してメディアン演算を行なう段階を含む段階と、
前記レファレンスピクチャインデックスに基づいてレファレンスピクチャの方向を決定する段階と、を有することを特徴とする動きベクトル及びレファレンスピクチャインデックスの決定方法。 - 前記現ブロックのレファレンスピクチャは固有情報を有し、
前記他のブロックのレファレンスピクチャは固有情報を有することを特徴とする請求項1に記載の動きベクトル及びレファレンスピクチャインデックスの決定方法。 - 前記固有情報は、方向を認識するためのディスプレイ順序を示すことを特徴とする請求項2に記載の動きベクトル及びレファレンスピクチャインデックスの決定方法。
- 前記ディスプレイ順序は、POC値によって表されることを特徴とする請求項3に記載の動きベクトル及びレファレンスピクチャインデックスの決定方法。
- 各動きベクトルの方向を認識するために、前記レファレンスピクチャインデックスによって指し示されるレファレンスピクチャのディスプレイ順序と、コーディングしようとするピクチャのディスプレイ順序とを比較する段階をさらに有することを特徴とする請求項4に記載の動きベクトル及びレファレンスピクチャインデックスの決定方法。
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JP2006000967A Expired - Lifetime JP4652979B2 (ja) | 2002-07-18 | 2006-01-05 | 予測動きベクトル演算方法 |
JP2007222563A Expired - Lifetime JP4331776B2 (ja) | 2002-07-18 | 2007-08-29 | 予測動きベクトル演算方法及び動きベクトル予測方法 |
JP2008169302A Pending JP2008236805A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
JP2008169240A Pending JP2008236802A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169296A Pending JP2008245330A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169150A Pending JP2008236801A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169280A Pending JP2008236804A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169101A Pending JP2008245329A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
JP2008169275A Pending JP2008236803A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
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JP2007222563A Expired - Lifetime JP4331776B2 (ja) | 2002-07-18 | 2007-08-29 | 予測動きベクトル演算方法及び動きベクトル予測方法 |
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JP2008169296A Pending JP2008245330A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169150A Pending JP2008236801A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169280A Pending JP2008236804A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトルの決定方法 |
JP2008169101A Pending JP2008245329A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
JP2008169275A Pending JP2008236803A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
JP2008169349A Pending JP2008236806A (ja) | 2002-07-18 | 2008-06-27 | 動きベクトル及びレファレンスピクチャインデックスの決定方法 |
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US (26) | US8571335B2 (ja) |
EP (7) | EP1672931B1 (ja) |
JP (11) | JP2004056756A (ja) |
KR (1) | KR100865034B1 (ja) |
CN (1) | CN1291604C (ja) |
DE (11) | DE10362296B4 (ja) |
GB (1) | GB2391126B (ja) |
HK (2) | HK1083408A1 (ja) |
NL (2) | NL1022332C2 (ja) |
RU (3) | RU2263349C2 (ja) |
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