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 |
US8934760(B2) |
申请公布日期 |
2015.01.13 |
申请号 |
US201314060471 |
申请日期 |
2013.10.22 |
申请人 |
Mitsubishi Electric Corporation |
发明人 |
Ryu Tomoaki;Nakane Kazuhiko;Shimada Masaaki;Yamada Yoshihisa |
分类号 |
H04N5/92;H04N5/917 |
主分类号 |
H04N5/92 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A non-transitory recording medium for a playback device, said recording medium containing 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 medium comprising:
a video data recording area for storing said video data comprising said video units, at least one of said video units including an access point P-picture 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, 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; wherein said video data recording area contains an attribute information including a picture type information; and a navigation data recording area for storing an entry point map including positional information and presentation time information of an entry point picture designated as an entry point; wherein a playback device accesses said navigation data recording area to read said entry point map and identifies a location of said I-picture based on said entry point map, in the case of accessing said I-picture. |
地址 |
Tokyo JP |