Matsushita Electric Industrial Co., Ltd.

Shigeo Shimada

Wataru Masuda

Simultaneous recording on and playback from both sides of a double sided disk is achieved Sector addresses on both sides of the disk are read by respective scanners. One of address is renumbered according to a preset conversion rule which minimizes a time difference between instructions (for recording and playback on both disk sides) to be output to respective modems. Recording and playback operation are controlled according to the renumbered sector address.

Apparatus for recording on and playback from both sides of a disk shaped

A method of simultaneous recording on and playback from both sides of a double sided disk in which sector addresses on both sides are read by scanners, one of them is renumbered according to a conversion rule determined to minimize a time difference between instructions for recording and playback on both sides to be output to modems and recording and playback operation is controlled according to the renumbered sector address.

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Kadoma, Japan

Shigeo Shimada