Method and apparatus for recording search information and searching for recorded digital data streams using the search information

A method for searching recorded digital data streams recorded in a recording medium comprising a mapping list and a stream object, the data streams stored in a plurality of stream object units, each stream object unit having a predetermined time length and at least one stream object unit forming a stream object, and the mapping list comprises time length information for each stream object unit, the recording medium further comprising a stream time map information table associated with the stream object, the stream time map information table comprising index information to indicate at least one first stream object unit associated with the stream object, the method comprising:

• locating the stream time map information table corresponding to the stream object;
• reading the index information of the stream time map information table, wherein the index information compnscs a number to locate the first stream object unit corresponding to the stream object;
• and
• locating the first stream object unit corresponding to the stream object.

An apparatus for recording search information for a digital data stream on a recording medium, the apparatus comprising:

• a recording device;
• and
• a control unit operatively connected to the recording device and configured to
• record the digital data stream by grouping the received digital data stream into a plurality of stream object units, each stream object unit having a predetermined time length, and at least one stream object unit forming a stream object;
• generate a stream time map information table associated with a stream object on the recording medium;
• record time length information for each stream object unit in a mapping list in a predefined order, the mapping list being separately maintained from the stream object;
• and
• record index information in the stream time map information table of the stream object, wherein the index information comprises an index number to indicate at least one first stream object unit associated with the stream object.

An apparatus for selectively searching recorded digital data streams recorded in a recording medium comprising a mapping list and a stream object, the data streams stored in a plurality of stream object units, each stream object unit having a predetermined time length and at least one stream object unit forming a stream object comprising, and the mapping list comprises time length information for each stream object unit, the recording medium further comprising a stream time map information table associated with each stream object, the stream time map information table comprising index information to locate a first stream object unit associated with a selected stream object, the apparatus comprising:

• a reproducing device;
• and
• a control unit operatively connected to the reproducing device and configured to locate the stream time map information table corresponding to a stream object;
• read the index information of the stream time map information table, wherein the index information comprises a number to indicate at least one first stream object unit corresponding to the stream object;
• and
• locate the first stream object unit corresponding to the selected stream object.

A method for recording a data stream on a recording medium, the method comprising:

• grouping the data stream into stream objects;
• recording a playlist for the stream objects, the playlist recorded in a common information file of the recording medium;
• and
• recording stream time map information in a stream information file of the recording medium, the stream time map information comprising a mapping list having time search information for searching the stream objects,
• wherein the common information file recording the playlist and the stream information file recording the stream time map information are managed as separate files.

A method for reproducing a data stream from a recording medium, the data stream grouped into stream objects, the method comprising:

• reading a playlist for the stream, objects, the playlist recorded in a common information file of the recording medium;
• and
• reading stream time map information in a stream information file of the recording medium, the stream time map information comprising a mapping list having time search information for searching the stream objects,
• wherein the common information file recording the playlist and the stream information file recording the stream time map information are managed as separate files.