发明名称 |
RANDOMLY ACCESSIBLE VISUAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD, AND REPRODUCING DEVICE AND REPRODUCING METHOD |
摘要 |
Access point pictures designated as randomly accessible positions are I pictures or P pictures. Information indicating the decoding sequence (I1, P1, B1, B2, B3, B4, P2, . . . ) of pictures functioning as access points and attribute information (picture_type) indicating whether a picture functions as an access point or is necessary for decoding of the access point following a given access point are recorded on the video information recording medium. Random access is possible even if the GOP interval is lengthened. |
申请公布号 |
US2015139625(A1) |
申请公布日期 |
2015.05.21 |
申请号 |
US201514610751 |
申请日期 |
2015.01.30 |
申请人 |
Mitsubishi Denki Kabushiki Kaisha |
发明人 |
RYU Tomoaki;NAKANE Kazuhiko;SHIMADA Masaaki;YAMADA Yoshihisa |
分类号 |
G11B27/00;G11B27/10;H04N19/44;H04N19/593;H04N19/577 |
主分类号 |
G11B27/00 |
代理机构 |
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代理人 |
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主权项 |
1. A video information recording method that records video data comprising a plurality of video units each of which includes an intra coded I-picture, a predictive coded P-picture including a group of blocks predicted from one picture and a bi-directionally-predictive coded B-picture including a group of blocks predicted from two pictures, said method comprising steps of:
recording at least an access point P-picture including a group of blocks each of which is coded by motion compensation prediction using an I-picture located at the beginning of said video unit including said access point P-picture or a selected one of preceding P-pictures; recording a P-picture and a B-picture coded by motion compensation prediction using said access point P-picture preceding said P-picture and said B-picture, wherein any P-pictures, other than access point P-pictures, and any B-pictures following said access point P-picture in the same video unit are coded without referring to any picture preceding said access point P-picture; recording an attribute information preceding said I-picture including picture type information specifying a type of each picture; and recording said video units and said attribute information in a video data recording area. |
地址 |
Tokyo JP |