Optical disc and method of identifying recording layer

Abstract

An optical disc in which a physical address of each smallest recording unit and a recorded address increase or decrease on first and second recording layers, and a method of identifying the recording layers. Embodiments are provided for discs having first and second recording layers with a same or an opposite track spiral direction. Physical addresses of the smallest recording units and a recorded address are increased or decreased between an inner radius and an outer radius of a recording layer in a manner which enables a reproducing and/or a recording device to more rapidly reproduce and/or record data on the disc. A physical address of the smallest recording units on the first recording layer is made different from a physical address of the smallest recording units on the second recording layer.

1 . A recording apparatus comprising a pickup to record data to first and second recording layers of an optical disc in which the first and second recording layers have a same track spiral direction, wherein, on the first recording layer, physical addresses of smallest recording units increase or decrease together with recording addresses of the smallest recording units recorded while recording on the disc, from an inner radius of the first recording layer to an outer radius of the first recording layer, and the recording apparatus identifies the first recording layer as being the first recording layer due to a trend of the physical and recording addresses as compared to a trend of other physical and recording addresses which identify the second recording layer.  
   
   
       2 . The apparatus of  claim 1 , wherein, on the second recording layer, the other physical address increases or decreases together with the other recorded address from an inner radius of the second recording layer to an outer radius of the second recording layer such that the apparatus identifies the second recording layer as being other than the first recording layer due to the trend of the other physical and recording addresses.  
   
   
       3 . The apparatus of  claim 1 , wherein, on the second recording layer, the other recorded address decreases as the other physical address increases and increases as the other physical address decreases, from an inner radius of the second recording layer to an outer radius of the second recording layer.  
   
   
       4 . The apparatus of  claim 1 , wherein the physical address is recorded in a form of pits at a front portion of each smallest recording unit.  
   
   
       5 . The apparatus of  claim 1 , wherein the physical address is recorded on a track in the form of a wobble.  
   
   
       6 . A recording apparatus comprising a pickup to record data to first and second recording layers of an optical disc in which the first and second recording layers have a same track spiral direction, wherein the first recording layer has recording addresses of smallest recording units recorded while recording the disc decrease as physical addresses of the smallest recording units increase or increase as the physical addresses decrease, from an inner radius of the first recording layer to an outer radius of the first recording layer so as to define a first trend, and the apparatus to identifies the first recording layer and distinguishes the first recording layer from the second recording layer using the detected trend so as to record the data according to the identification.  
   
   
       7 . The apparatus of  claim 6 , wherein, on the second recording layer, other physical addresses increase or decrease together with other recording addresses from an inner radius of the second recording layer to an outer radius of the second recording layer to define a second trend used by the apparatus to identify the second recording layer and distinguish the second recording layer from the first recording layer.  
   
   
       8 . The apparatus of  claim 7 , wherein the physical address is recorded in a form of pits at the front of each smallest recording unit.  
   
   
       9 . The apparatus of  claim 7 , wherein the physical address is recorded on a track in a form of a wobble.  
   
   
       10 . The apparatus of  claim 6 , wherein, on the second recording layer, other recording addresses decrease as other physical addresses increase or increase as the other physical addresses decrease, from an inner radius of the second recording layer to an outer radius of the second recording layer to define a second trend used by the apparatus to identify the second recording layer and distinguish the second recording layer from the first recording layer.  
   
   
       11 . The apparatus of  claim 10 , wherein the physical address is recorded in a form of pits at the front of each smallest recording unit.  
   
   
       12 . The apparatus of  claim 10 , wherein the physical address is recorded on a track in a form of a wobble.  
   
   
       13 . The apparatus of  claim 6 , wherein the physical address is recorded in a form of pits at a front portion of each smallest recording unit.  
   
   
       14 . The apparatus of  claim 6 , wherein the physical address is recorded on a track in a form of a wobble.  
   
   
       15 . A recording apparatus comprising a pickup to record data to first and second recording layers of an optical disc and which have opposite track spiral directions, wherein physical addresses of smallest recording units on the first and second recording layers increase or decrease together with recording addresses of the smallest recording units recorded during recording on the disc so as to define trends and which are used by the apparatus to identify the first recording layer and distinguish the first recording layer from the second recording layer during the data recording.  
   
   
       16 . The apparatus of  claim 15 , wherein the physical addresses increase or decrease together with recording addresses on the second recording layer to define the trends used by the apparatus to identify the first recording layer and distinguish the first recording layer from the second recording layer.  
   
   
       17 . The apparatus of  claim 15 , wherein the recording addresses decrease as the physical addresses increase and increase as the physical addresses decrease on the second recording layer to define the trends used by the apparatus to identify the first recording layer and distinguish the first recording layer from the second recording layer..  
   
   
       18 . The apparatus of  claim 15 , wherein: 
 on the first recording layer, the physical addresses and the recording addresses increase or decrease from an inner radius of the first recording layer to an outer radius of the first recording layer to define a first one of the trends used by the apparatus to identify the first recording layer; and    on the second recording layer, the physical addresses and the recording addresses increase or decrease from an outer radius of the second recording layer to an inner radius of the second recording layer to define a second one of the trends used by the apparatus to identify the second recording layer.    
   
   
       19 . The apparatus of  claim 15 , wherein: 
 on the first recording layer, the physical addresses and the recording addresses increase or decrease from an outer radius of the first recording layer to an inner radius of the first recording layer to define a first one of the trends used by the apparatus to identify the first recording layer; and    on the second recording layer, the physical addresses and the recording addresses increase or decrease from an inner radius of the second recording layer to an outer radius of the second recording layer to define a second one of the trends used by the apparatus to identify the second recording layer.    
   
   
       20 . A recording apparatus comprising a pickup to record data to first and second recording layers of an optical disc and having have opposite track spiral directions, wherein, on the first recording layer, recording addresses of smallest recording units recorded while recording data on the disc decrease as physical addresses of the smallest recording units increase and increase as the physical addresses decreases such that the apparatus identifies the first recording layer as distinguished from the second recording layer during data recording.  
   
   
       21 . The apparatus of  claim 20 , wherein, on the second recording layer, the physical address increases or decreases together with the recording address such that the apparatus identifies the second recording layer as distinguished from the first recording layer.  
   
   
       22 . The apparatus of  claim 20 , wherein, on the second recording layer, the recording addresses decrease as the physical addresses increase and increase as the physical addresses decrease such that the apparatus identifies the second recording layer as distinguished from the first recording layer.  
   
   
       23 . The apparatus of  claim 20 , wherein: 
 on the first recording layer, the physical addresses and the recording addresses increase or decrease from an inner radius of the first recording layer to an outer radius of the first recording layer such that the apparatus identifies the first recording layer as distinguished from the second recording layer, and    on the second recording layer, the physical addresses and the recording addresses increase or decrease from an outer radius of the second recording layer to an inner radius of the second recording layer such that the apparatus identifies the second recording layer as distinguished from the first recording layer.    
   
   
       24 . The apparatus of  claim 20 , wherein: 
 on the first recording layer, the physical addresses and the recording addresses increase or decrease from an outer radius of the first recording layer to an inner radius of the first recording layer such that the apparatus identifies the first recording layer as distinguished from the second recording layer, and    on the second recording layer, the physical addresses and the recording addresses increase or decrease from an inner radius of the second recording layer to an outer radius of the second recording layer such that the apparatus identifies the second recording layer as distinguished from the first recording layer.