Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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NEC Corp
Original Assignee
NEC Corp
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Filing date
Publication date
Application filed by NEC CorpfiledCriticalNEC Corp
Priority to JP18159787ApriorityCriticalpatent/JPS6425355A/en
Publication of JPS6425355ApublicationCriticalpatent/JPS6425355A/en
Optical Record Carriers And Manufacture Thereof
(AREA)
Signal Processing For Digital Recording And Reproducing
(AREA)
Optical Recording Or Reproduction
(AREA)
Abstract
PURPOSE:To enable a supplier to make the characteristic test of an optical disk medium which accompanies the process of writing to the data part of the sectors assigned for the supplier by forming the sector constituted by putting the information indicating whether the sector is for a user or the supplier to a header part and assuring the optional sector or track on the optical disk medium as the sector or track for the supplier. CONSTITUTION:The information discriminating whether the sector is for the user or the supplier is recorded into the discrimination header part preformatted for every sector, so that the supplier of the medium can use the tracks or the sectors of every other optional number. For example, a FLAG 4 is a pattern to discriminate whether this sector is for the user or the supplier. This pattern enables the supplier to make the characteristic test accompanying the writing test in arbitrarily dispersed places.
JP18159787A1987-07-201987-07-20Optical disk medium
PendingJPS6425355A
(en)