Disk apparatus

A disk apparatus comprising:

• a disk recording medium having n spatially separated regions (n is a natural number) in a track direction;
• a data reproducing apparatus for reproducing compressed data of m channels which have been separated and recorded (m is a natural number, m.ltoreq.n) on n regions of the disk in a track direction;
• a data separating apparatus for separating into m channels the compressed data reproduced by the data reproducing apparatus;
• a data expander for expanding the compressed data of m channels obtained from the data separating apparatus;
• a reproducing data delay apparatus for adjusting the timing of the expansion data of m channels obtained from the data expander, wherein the data of m channels are reproduced simultaneously and continuously.

A disk apparatus comprising:

• a disk recording medium having regions divided into n spatially separated sections (n is a natural number) in the direction of a track;
• a data recording and reproducing apparatus for recording data of m channels (m is a natural number, m.ltoreq.n) compressed to less than 1/n in term of time upon the spatially separated regions of the disk recording medium, or reproducing the compressed data of the recorded m channels,
• a data reproducing block including a data separating apparatus for separating the data reproduced by the recording and reproducing apparatus into m channels;
• a data expander for expanding the compressed data of m channels obtained from the data separating apparatus;
• and a reproducing data delay apparatus for adjusting the timing of the expanded data of m channels obtained by the data expander;
• and a data recording block including a data compressor for compressing the data of p channels (p is a natural number, p.ltoreq.n) to less than 1/p in terms of time, a recording data delay apparatus for delay the compressed data of p channels so that the data compressed by the data compressor are arranged in time division;
• a data compounding apparatus for compounding the compressed data of p channels into a data stream, whereby the data reproducing block reproduces the compressed data of m channels recorded on the disk to compound or operate upon the data recorded on the disk into data of p channels by an external editing apparatus, and whereby the disk recording block compresses respectively the edited data of p channels to less than 1/n in terms of time and records the compressed data of p channels on the disk again.