Method and system for buffering data file to buffer memory

A system for reading a coded audio data file in an optical storage medium and buffering the audio data file to a buffer memory, said audio data file comprising a plurality of blocks which are stored sequentially in a plurality of storing units in said optical storage medium, each block divided into a subcode block and a corresponding main data block, said subcode block comprising a plurality of coded subcodes, said subcodes comprising an address for each corresponding block, said main data block correspondingly comprising coded audio data, the system comprising following elements:

• an address control unit, used for designating a starting block where buffering starts, decoding the blocks after the starting block via a subcode decoding procedure to obtain said subcodes in said subcode block, and searching for said starting block in said blocks in said optical storage medium;
• a subcode buffer controller, used for continuously proceeding said subcode decoding procedure, after said starting block is searched, to correspondingly decode said subcode block in the blocks after said starting block, and sequentially buffering said decoded subcodes, after decoding performed, respectively in a plurality of corresponding buffer units in said buffer memory;
• and
• a main data buffer controller, used for proceeding a main data decoding procedure, after said starting block is searched, to correspondingly decode said main data blocks in said starting block and the blocks after it, and sequentially buffering said decoded audio data respectively in said plurality of corresponding buffer units in said buffer memory.