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For Compact Discs(CD) and Digital Versatile Discs( DVD), the Lead- In is the preamble located at the beginning of the data recording after the Program Calibration Area ( PCA) and Program Memory Area( PMA) data fields.

The Lead-In contains the Table of Content ( TOC) of the respective session. The Lead-In area can contain up to 4,500 sectors and thus be up to 10.5 megabytes( MB) in size. For compact discs that are still being written to, the lead-in provides the address range for the recordable sectors.

The lead-in area is located at the inner radius of the recording and is therefore also referred to as the Inner Guard Area (IGA).

Englisch: lead-in
Updated at: 19.08.2011
#Words: 107
Links: call deflection (ETSI) (CD), digital versatile disc (DVD), indium (In), data, power calibration area (CD) (PCA)
Translations: DE

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