Method of determining recording area of multi-layer optical disc, and recording and playback apparatus
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United States of America Patent
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Sep 22, 2009
Grant Date -
May 17, 2007
app pub date -
Nov 16, 2006
filing date -
Nov 17, 2005
priority date (Note) -
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Abstract
To reduce influence of errors on the outer periphery side of a multi-layer recording disc, a first shifted middle area is assured at a predetermined position nearer to the inner periphery side than the last position of layer on the outer periphery side of a single-sided, multi-layer recording disc, and a second shifted middle area is assured at the position of layer that opposes the shifted middle area assured on layer. A recording layer extending from layer to layer may be shifted in the first and second shifted middle areas, and an area in which errors relatively readily occur on the outer periphery side of the first and second shifted middle areas may not be used.
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