Information recording medium, information reproducing apparatus, information reproducing method and information recording method

Abstract

An information recording medium includes a user information storage area which stores user information, a test write area which is extendable and for test write of information, a spare area which is extendable and capable of alternatively storing user information, and a recording position management information area including recordable range information expressing recordable ranges in the aforesaid test write area and the aforesaid spare area. The information recording medium, an information reproducing apparatus, an information reproducing method and an information recording method which make it easy to record and reproduce information properly are provided.

1 . An information recording medium, comprising: 
 a user information storage area which stores user information;    a test write area which is extendable and for test write of information;    a spare area which is extendable and capable of alternatively storing user information; and    a recording position management information area including recordable range information expressing recordable ranges in said test write area and said spare area.    
   
   
       2 . An information reproducing method, comprising: 
 reproducing information from an information recording medium comprising a user information storage area which stores user information, a test write area which is extendable and for test write of information, a spare area which is extendable and capable of alternatively storing user information, and a recording position management information area including recordable range information expressing recordable ranges in said test write area and said spare area.    
   
   
       3 . An information recording method, comprising: 
 recording information in an information recording medium comprising a user information storage area which stores user information, a test write area which is extendable and for test write of information, a spare area which is extendable and capable of alternatively storing user information, and a recording position management information area including recordable range information expressing recordable ranges in said test write area and said spare area.