Data recording and reproducing method for multi-layered optical disk system

Abstract

A data recording and reproducing method for an optical disk data storage system to record data compressed at different data compression rate according to an operator's specification, and to reproduce the recorded data by decompressing. According to the operator's indication, the data is recorded at certain data compression rate in indicated area. The information of the data compression rate and the recorded area is stored as a table of contents (TOC) data. The TOC data is reproduced and stored in a memory after the optical disk is loaded. The recorded data is reproduced by selecting a decoding circuit to decompress the data The decoding circuit is selected by referring the TOC data to identify data compression rate of the recorded data. Also the TOC data is referred to identify read-in and read-out region of the recorded data. The position of a pick-up when the data recording is started and ended, is recorded as the TOC data to provide random access capability for the data reproduction.

1 . An optical disk recording and reproducing method comprising the steps of: 
 receiving an operator's signal to record a data on a multi-layered optical disk at indicated data compression rate;    accessing to a read-in region to record the data;    operating a routing circuit to transmit the data to data compressing means which compresses the data at the indicated data compression rate;    recording the data at the indicated data compression rate, and on the indicated region;    rewriting a total of contents (TOC) data to record data about the data compression rate of the newly recorded data;    reproducing the TOC data recorded in the multi-layered optical disk;    storing the reproduced TOC data in a memory;    receiving the operator's signal to reproduce the data recorded in the multi-layered optical disk;    referring the TOC data stored in the memory to identify the data compression rate of the data; and    operating a routing circuit to transmit readout signal of the data to data decompressing means which decompresses the data from the indicated data compression rate to a standardized bit rate of data signal.    
   
   
       2 . An optical disk recording and reproducing method comprising the steps of: 
 receiving an operator's signal to record a data on a multi-layered optical disk at indicated data compression rate;    accessing to a read-in region to record the data;    operating a routing circuit to transmit the data to data compressing means which compresses the data at the indicated data compression rate;    recording the data at the indicated data compression rate, and on the indicated region;    rewriting a total of contents (TOC) data to record data about the data compression rate of the newly recorded data;    reproducing the TOC data recorded in the multi-layered optical disk;    storing the reproduced TOC data in a memory,    receiving the operator's signal to reproduce at least two data continuously, which are recorded in the multi-layered optical disk;    referring the TOC data stored in the memory to identify data compression rate and position of read-in region of all of the specified data;    operating a routing circuit to transmit readout signal of the first specified data to data decompressing means which decompresses the first specified data from the indicated data compression rate to a standardized bit rate of data signal;    accessing to read-in region of the first specified data by modulating pickup driving means according to identified position of read-in region of the first specified data;    reproducing the first specified data;    operating a routing circuit to transmit readout signal of the next specified data to data decompressing means which decompresses the next specified data from the indicated data compression rate to a standardized bit rate of data signal;    accessing to read-in region of the next specified data by modulating pickup driving means according to identified position of read-in region of the next specified data; and    reproducing the next specified data.