RECORDING METHOD, REPRODUCTION METHOD, AND RECORDING MEDIUM REPRODUCTION SYSTEM
PROBLEM TO BE SOLVED: To enable random access even if GOP length is increased.SOLUTION: A P picture which is used as a randomly accessible access point is encoded as an access point P picture on the basis of an I picture at a head in a video information unit to which the P picture belongs or a previ...
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Main Authors | , , , |
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Format | Patent |
Language | English Japanese |
Published |
30.11.2017
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To enable random access even if GOP length is increased.SOLUTION: A P picture which is used as a randomly accessible access point is encoded as an access point P picture on the basis of an I picture at a head in a video information unit to which the P picture belongs or a previous P picture predicted without using a B picture. As a subsequent picture of the access point P picture, the P picture and the B picture are encoded, where these pictures are predicted on the basis of the preceding access point P picture or a P picture or a B picture predicted from the access point P picture but these pictures do not use pictures before the preceding access point P picture in prediction.SELECTED DRAWING: Figure 1
【課題】GOPの長さを長くしても、ランダムアクセスを可能とする。【解決手段】ランダムアクセス可能なアクセスポイントとして用いられるPピクチャーを、当該Pピクチャーが属する映像情報単位の先頭のIピクチャー、またはBピクチャーを用いずに予測された以前のPピクチャーに基づいて、アクセスポイントPピクチャーとして符号化し、前記アクセスポイントPピクチャーの後続のピクチャーとして、直前の前記アクセスポイントPピクチャー、あるいは当該アクセスポイントPピクチャーから予測されたPピクチャーまたはBピクチャーに基づいて予測され、直前の前記アクセスポイントPピクチャー以前のピクチャーについては予測に用いないPピクチャーおよびBピクチャーを符号化する。【選択図】図1 |
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Bibliography: | Application Number: JP20170141628 |