Patent ID: 6577811
Filing Date: 2003-06-10
Classification: G11B,H04N

Abstract:
A digital information recording medium, comprising:a management information recording area including management information, wherein the management information includes program chain information, the program chain information representing a total presentation of a program chain; and a contents recording area having: a plurality of data units each having data packs; at least one of said data units comprises one or more audio packs configured to store a primary audio stream; at least one of said data units includes one or more dummy packs configured to record a secondary audio stream comprising after-recorded audio data, said primary audio stream being recorded prior to recording said second audio stream; said contents recording area further managed by a program configured in units of information cells, the contents recording area including recorded data corresponding to or being referred by at least one of the information cells, wherein at least one of the information cells correspond or belong to the program chain and wherein the program chain information includes an erase prohibition flag applied to the program.