Patent ID: 6975570

Claim:
An optical-disk recording apparatus for recording data in a data recording field of an optical disk having a sector structure constituted of a header field previously storing address information and a data recording field for storing data, the header field including an address mark field storing an address mark showing a beginning of address information, an address information field storing address information, and an error detection code field storing an error detection code for detecting an error in the address information field, said optical-disk recording apparatus comprising: address-mark detection means for detecting an address mark stored in the address mark field of the sector; and data-recording decision and control means for deciding and controlling a period of recording data recording field of the sector; wherein said data-recording decision and control means uses an address-mark detection timing of said address-mark detection means in deciding and controlling the data recording period; wherein said data-recording decision and control means includes address-information error detection means for detecting a presence or absence of an error in the address-informaiton based on the address information and the error detection code, and timing generation means for generating a recording timing signal for deciding a data recording operation by using the address-mark detection timing of detecting the address mark by said address-mark detection means and a timing of detecting by said address-information error detection means that there is no error in the address information; and wherein said data-recording decision and control means, when recording data in the data recording field of a predetermined sector, permits data recording only where address information having no error is obtained as a result of error detection in the subject sector executed by said address-informaiton error detection means, and where at least one piece of address information having no error is obtained in a predetermined number of sectors preceding the subject sector as a result of error detection by said address-information-error detection means and at least one address mark is detected in the address mark field of the subject sector.