Recording medium of stream data, and recording method and playback method of the same

An information recording method that uses an information medium which has a data area in which stream data can be recorded in a predetermined data recording unit, and a management area in which management information that pertains to the stream data can be recorded, wherein the management information can record first management information used to access the stream data;

• second management information, being different from the first management information, used to access the stream data;
• and third management information indicating a relationship between the first management information and second management information, said information recording method comprising:
• extracting the first management information from stream data to be recorded;
• extracting the second management information from the stream data to be recorded;
• recording the stream data in the data area of said information medium;
• and
• recording the third management information in the management area of said information medium.

An information recording method that employs a stream data recording device for recording stream data, using a predetermined reference clock, obtained from a stream data supply device, and that employs an information medium which has a data area in which stream data can be recorded in a predetermined data recording unit, and a management area in which management information that pertains to the stream data can be recorded,

• wherein the management information can record first management information used to access the stream data;
• second management information, being different from the first management information, used to access the stream data;
• and third management information indicating a relationship between the first management information and second management information,
• said information recording method comprising:
• executing a synchronization process of the predetermined reference clock between the stream data supply device and the stream data recording device;
• correcting or modifying the third management information based on a result of the synchronization process of the reference clock;
• and
• recording the corrected or modified third management information in the management area of the information medium.

An information playback method for playing back stream data from an information medium which has a data area in which the stream data can be recorded in a second data unit including a first data recording unit, and a management area in which management information that pertains to the stream data can be recorded, wherein the management information can record first management information used to access the stream data;

• second management information, being different from the first management information, used to access the stream data;
• and third management information indicating a relationship between the first management information and second management information, said information playback method comprising:
• when the stream data has a plurality of continuous second data units,
• checking a position difference from a neighboring boundary position of the plurality of continuous second data units to a position of the first data recording unit indicated by the second management information;
• starting read of the stream data recorded on the information medium from the neighboring boundary position but discarding or ignoring read data until the position of the first data recording unit indicated by said position difference;
• and
• starting playback of the stream data recorded on the information medium from the position of the first data recording unit indicated by said position difference.

An information playback method for playing back stream data from an information medium which has a data area in which the stream data can be recorded in a second data unit including a first data recording unit, and a management area in which management information that pertains to the stream data can be recorded, wherein the management information can record first management information used to access the stream data;

• second management information, being different from the first management information, used to access the stream data;
• and third management information indicating a relationship between the first management information and second management information, said information playback method comprising:
• checking a start address of the second data unit including the first management information;
• discarding or ignoring playback information other than an access position of the stream data indicated as the first management information, using the checked start address of the second data unit;
• and
• sequentially playing back or sequentially displaying only playback information at the access position of the stream data.

A data structure applicable to an information medium which has a data area in which stream data can be recorded in a predetermined data recording unit, and a management area in which management information that pertains to the stream data can be recorded, wherein the management information is capable of recording

• first management information used to access the stream data;
• second management information, being different from the first management information, used to access the stream data;
• and
• third management information indicating a relationship between the first management information and second management information.