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 代理人
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