Patent ID: 8923687

Claim:
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 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.