Information record medium, apparatus for recording the same and apparatus for reproducing the same

An information reproducing apparatus for reproducing record information from an information record medium comprising a data structure stored in said information record medium and including:

• processed record information, which is generated by applying a predetermined signal process to said record information including video information and other information to be recorded, and which is composed of a plurality of predetermined information units;
• recording position information, which indicates recording positions on said information record medium of said information units corresponding to reproduction times of said record information within a predetermined range before and after said respective one of said information units on an axis of reproduction time of said record information;
• and video presence information, which corresponds to said recording position information and indicates presence or absence of said video information at each of said information units whose recording positions are indicated by said record position information, said processed record information, said recording position information and said video presence information being multiplexed by respective one of said information units, said plurality of information units including a first portion that is commonly owned by a plurality of programs and a second portion that is not commonly owned by the plurality of programs, said second portion constituting an interleaved part in which some of said plurality of information units belonging to the plurality of programs are interleaved and recorded so as to perform a seamless reproduction of each of said plurality of programs, said information reproducing apparatus comprising:
• a detection and demodulation means for detecting and demodulating said processed record information, said recording position information and said video presence information from said information record medium on the basis of a control signal, to thereby output a demodulation signal;
• an extract means for extracting said recording position information and said video presence information out of said demodulation signal;
• and
• a control means for outputting said control signal on the basis of said extracted recording position information and said extracted video presence information to control the reproduction of said plurality of information units including said first portion and said second portion.

An article of manufacture comprising:

• an information recording medium;
• processed record information recorded on the information recording medium, the processed record information being generated by applying a predetermined signal process to record information to be reproduced by an information reproducing apparatus for performing a reproduction of the record information, the processed record information including video information and other information and being composed of a plurality of predetermined information units;
• first recording position information recorded on the information recording medium, the first recording position information indicating recording positions on the information record medium of the information units corresponding to reproduction times of the record information within a predetermined range before and after the respective one of the information units on an axis of reproduction time of the record information;
• and
• second recording position information recorded on the information recording medium, the second recording position information corresponding to the first recording position information and indicating recording positions of the video information to be reproduced within the predetermined range on the axis of reproduction time,
• wherein the processed record information, the first recording position information and the second recording position information are multiplexed by respective one of the information units, and the plurality of information units includes a first portion that is commonly owned by a plurality of programs and a second portion that is not commonly owned by the plurality of programs, said second portion constitutes an interleaved part in which some of the plurality of information units belonging to the plurality of programs are interleaved and recorded so as to perform a seamless reproduction of each of said plurality of programs in accordance with the reproduced first portion and second portion of the information units.

An article of manufacture comprising:

• an information recording medium;
• processed record information recorded on the information recording medium, the processed record information being generated by applying a predetermined signal process to record information to be reproduced by an information reproducing apparatus for performing a reproduction of the record information, the processed record information including video information and other information and being composed of a plurality of predetermined information units;
• recording position information recorded on the information recording medium, the recording position information indicating recording positions on the information record medium of the information units corresponding to reproduction times of the record information within a predetermined range before and after the respective one of the information units on an axis of reproduction time of the record information;
• and
• video presence information recorded on the information recording medium, the video presence information corresponding to the recording position information, and indicating presence or absence of the video information at each of the information units whose recording positions are indicated by the record position information,
• wherein the processed record information, the recording position information and the video presence information are multiplexed by respective one of the information units, and the plurality of information units includes a first portion that is commonly owned by a plurality of programs and a second portion that is not commonly owned by the plurality of programs, said second portion constitutes an interleaved part in which some of the plurality of information units belonging to the plurality of programs are interleaved and recorded so as to perform a seamless reproduction of each of said plurality of programs in accordance with the reproduced first portion and second portion of the information units.