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US 7,352,684 B2Granted
Information medium and information recording and reproducing device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKiyoshi Tanii, Hiroyuki Yamaguchi, Shoichi Okabayashi
Life of this patent
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Abstract
The information medium of the present invention is provided with a lead-in region and a data region in which information signals can be recorded, wherein the lead-in region has a recordable portion in which information signals can be recorded. An identifier I1 specifying a recording speed that can be adopted when recording information signals to the data region is provided in the recordable portion of the lead-in region, increasing the precision with which the recording speed is specified.
Claims3
An information medium comprising:
- a lead-in region and a data region in which an information signal can be recorded;
- wherein the lead-in region has a recordable portion in which information signals can be recorded and a pit portion in which non-rewritable pits are formed,
- a first identifier is recorded in the pit portion using the pits, the first identifier specifying a recording speed with respect to the data region,
- the recordable portion includes a region describing a medium state, the region describing a medium state at least including a region for recording disc identification information therein, and
- in the region describing a medium state other than the region for recording disc identification information, a second identifier is recorded, the second identifier specifying whether the first identifier is valid or invalid.
2 more elements
Dependencies are inferred from the claim text.