Recording apparatus, reproducing apparatus, recording method, reproducing method, and recording medium

A recording method, comprising the steps of:

• inputting content data;
• compressing the content data;
• extracting a portion of the content data, which portion of the content data is to be used as an index entry, based on data type information obtained during the compression of the content data;
• and
• recording on a recording medium the compressed content data, the portion of the content data, and recording time information obtained during the compression of the content data.

A recording apparatus, comprising:

• a data recording unit configured to intermittently record content data on a recording medium;
• an index-information-and-portion-of-data generating unit configured to generate index information from the content data and to extract a portion of the content data, which portion of the content data corresponds to the index information, while the data recording unit is recording the content data;
• and
• an index-information-and-portion-of-data recording unit configured to record on said recording medium, during intervals between recording sessions by the data recording unit of the content data, the index information and the portion of the content data generated/extracted by the index-information-and-portion-of-data generating unit.

A recording method, comprising:

• a data recording step of intermittently recording content data on a recording medium;
• an index-information-and-portion-of-data generating step of generating index information from the content data and extracting a portion of the content data, which portion of the content data corresponds to the index information, while the content data are being recorded in the data recording step;
• and
• an index-information-and-portion-of-data recording step of recording on said recording medium, during intervals between recording sessions of the content data in the data recording step, the index information and the portion of the content data generated/extracted in the index-information-and-portion-of-data generating step.

A computer-readable recording medium having a program embodied therein, said program comprising:

• a data recording code unit configured to intermittently record content data on a recording medium;
• an index-information-and-portion-of-data generating code unit configured to generate index information from the content data and to extract a portion of the content data, which portion of the content data corresponds to the index information, while the data recording code unit is recording the content data;
• and
• an index-information-and-portion-of-data recording code unit configured to record on said recording medium, during intervals between recording sessions by the data recording code unit of the content data, the index information and the portion of the content data generated/extracted by the index-information-and-portion-of-data generating code unit.