US 2006/0077820 A1 · Optical disk apparatus

Abstract

An optical disk apparatus for recording data on an optical disk having a land pre-pit (LPP). An encoder of a DVD-R/RW drive records data while inserting synchronization information having a length of 14T at the top of a synchronous frame. The encoder sets synchronization information of the i-th frame (wherein i is an integer which is 0 or greater) and the (i+1)th frame of a plurality of consecutive frames to either a mark or a space such that each DSV is minimized. The encoder sets the synchronization information of the (i+2)th frame such that the polarity of the synchronization information of the (i+2)th frame is opposite to the polarity of the synchronization information of the i-th frame, and sets the synchronization information of (i+3)th frame such that the polarity of the synchronization information of (i+3)th frame is opposite to the polarity of the synchronization information of the (i+1)th frame. In this manner, the synchronization information of one of two frames, whether they are two odd frames or two even frames, is always set to a space.

Claims6

Dependent claims

An optical disk apparatus for recording data on an optical disk, comprising:

synchronization control means which sets a polarity of synchronization information of each of the i-th frame (wherein i is an integer which is 0 or greater) and the (i+1)th frame of a plurality of consecutive frames to either a mark or a space such that a DSV is minimized, sets a polarity of synchronization information of the (i+2)th frame to a polarity opposite to the polarity of the synchronization information of the i-th frame, and sets a polarity of synchronization information of the (i+3)th frame to a polarity opposite to the polarity of the synchronization information of the (i+1)th frame;
and
an optical pickup for recording data while inserting the synchronization information which is set by the synchronization control means into each frame.

An optical disk apparatus for recording data on an optical disk, comprising:

synchronization control means which sets a polarity of synchronization information of the i-th frame (wherein i is an integer which is 0 or greater) of a plurality of consecutive frames to either a mark or a space such that a DSV is minimized, sets polarities of synchronization information of the (i+1)th frame and the (i+2)th frame to a polarity opposite to the polarity of the synchronization information of the i-th frame, and sets a polarity of synchronization information of the (i+3)th frame to the same polarity as the polarity of the synchronization information of the i-th frame;
and
an optical pickup for recording data while inserting the synchronization information which is set by the synchronization control means into each frame.

An optical disk apparatus for recording data on an optical disk, comprising:

synchronization control means which sets a polarity of synchronization information of the i-th frame (wherein i is an integer which is 0 or greater) of a plurality of consecutive frames to either a mark or a space such that a DSV is minimized, sets a polarity of synchronization information of the (i+1)th frame to the same polarity as the polarity of the synchronization information of the i-th frame, and sets polarities of the synchronization information of the (i+2)th frame and the (i+3)th frame to a polarity opposite to the polarity of the synchronization information of the i-th frame;
and
an optical pickup for recording data while inserting the synchronization information which is set by the synchronization control means into each frame.

Dependencies are inferred from the claim text.

Optical disk apparatus

Life of this patent

Optical disk apparatus

Life of this patent

Abstract

Claims6