Patent ID: 7343285
Filing Date: 2008-03-11
Classification: G10L,G11B

Abstract:
1. A method for encoding user data into an uncompressed audio file to be recorded to a compact disc (CD) in track-at-once mode, comprising: formatting the user data for encoding into the uncompressed audio file, wherein the formatted user data have a header block and a plurality of data blocks, the header block and each of the plurality of data blocks having an ID string identifying related user data, the header block having total blocks used to identify the number of blocks of formatted user data, the ID string and the total blocks being used for re-assembling the formatted user data into a single user data file before being formatted for encoding; reading the uncompressed audio file; parsing audio data of the uncompressed audio file into words of the audio data, wherein each word contains 16 bits; replacing a least significant bit (LSB) of each word of the audio data with one bit of the formatted user data to encode the audio data, wherein replacing the LSB of each word changes processing of the uncompressed audio file from 16 bits per channel to 15 bits per channel, and wherein the bits of formatted user data in the encoded audio data are to be re-assembled in a form of the user data before being formatted to be encoded into the audio data; and writing the encoded audio data to the CD in track-at-once mode.