US 7,551,530 B2
Optical disc recording system
Naoto Yamamoto, Tokyo (Japan); Shigeru Shimonou, Tokyo (Japan); and Masatsugu Ogawa, Tokyo (Japan)
Assigned to NEC Corporation, Tokyo (Japan)
Filed on May 25, 2005, as Appl. No. 11/136,863.
Claims priority of application No. 2004-154422 (JP), filed on May 25, 2004; and application No. 2004-183350 (JP), filed on Jun. 22, 2004.
Prior Publication US 2006/0181981 A1, Aug. 17, 2006
Int. Cl. G11B 5/09 (2006.01)
U.S. Cl. 369—47.1  [369/59.25; 369/53.2] 18 Claims
OG exemplary drawing
 
1. An optical disc recording system comprising:
a host apparatus configured to issue commands; and
an optical disc recording apparatus configured to carry out a process corresponding to each of said commands, and to reply a response data to said command to said host apparatus,
wherein said host apparatus issues a record command as one of said commands to record a record data in an optical disc medium,
an optical disc recording apparatus records said record data in a data area in a predetermined format in response to said record command, wherein said optical disc comprises said data area and a first control data recording area,
said optical disc recording apparatus additionally sets each of second control data recording areas in said data area in association with a command from said host apparatus as one of said commands,
a record status control data is recorded in said first or second control data recording area to indicate record status of said record data,
at least a part of information related to said additional setting of a second control data recording area is shared by said host apparatus and said optical disc recording apparatus,
wherein when a size of an unused record area remaining in said first control data recording area or said second control data recording areas is equal to or less than a predetermined threshold, it is determined that said second control data recording area should be additionally set in said data area,
wherein said predetermined threshold is equal to or larger than 2*m, where m is a number of said tracks accessible at a same time, to one of record units of said record data.