Real-time lossless encoding and decoding system by moving excess data amounts, and a method therefor

A method of losslessly encoding input audio data in real time, comprising:

• losslessly compression encoding the audio data in units of predetermined data and outputting the encoded audio data in sequence;
• and
• distinguishing each predetermined data unit of the encoded audio data as first data having a data amount exceeding a maximum bitrate or second data having a data amount less than the maximum bitrate, dividing the first data into third data being the encoded audio data having a data amount of the maximum bitrate and fourth data being the encoded audio data of a portion of the first data exceeding the maximum bitrate, and outputting the fourth data together with the corresponding second data.

A lossless encoding and decoding method of encoding and decoding input audio data in real time, comprising:

• losslessly compression encoding the audio data in units of predetermined data and outputting the encoded audio data in sequence;
• distinguishing each predetermined data unit of the encoded audio data as first data having a data amount exceeding a maximum bitrate or second data having a data amount less than the maximum bitrate, dividing the first data into third data being the encoded audio data having a data amount of the maximum bitrate and fourth data being the encoded audio data of a portion of the first data exceeding the maximum bitrate, adding identification information to the third data and fourth data to indicate which of the third data and fourth data are from the same predetermined data units, and controlling the encoded audio data so that the fourth data is output together with the second data, and the second through fourth data are output as a bitstream;
• losslessly restoring the bitstream, to generate the input audio data, such that the second data having no identification information among the bitstream is losslessly restored and the third data and fourth data having the same identification information are combined and losslessly restored.

A lossless processing method of processing input audio data in real time, comprising:

• losslessly compression encoding the input audio data in units of predetermined data and outputting the encoded audio data in sequence;
• and
• determining first ones of the predetermined data units having data amounts less than a maximum bitrate, second ones of the predetermined data units having data amounts greater than the maximum bitrate, moving data amounts of the second predetermined data units in excess of the maximum bit rate to previous ones of the first predetermined data units, and outputting the first predetermined data units with no excessive data amounts added thereto, the first predetermined data units with the excessive data amounts from the second predetermined data units, and the second predetermined data units having data amounts of the maximum bitrate.

A method of decoding audio data in real time which has been losslessly compression encoded in sequence, predetermined data units of the encoded audio data have data amounts in excess of a maximum bitrate, and the excessive data amounts have been combined with data amounts of ones of the predetermined data units which are less than the maximum bitrate, the method comprising:

• moving the excessive data amounts back to the corresponding ones of the predetermined data units originally having data amounts in excess of the maximum bitrate;
• and
• losslessly restoring the encoded audio data subsequent to moving the excessive data amounts back to the corresponding predetermined data units originally having data amounts in excess of the maximum bitrate.

A lossless decoding method of decoding input data to restore audio data in real time, comprising:

• losslessly restoring the input audio data, to generate the restored audio data;
• and
• controlling the lossless restoring so that first data having no identification information among the input audio data is losslessly restored and second data having identification information is combined with third data having the same identification information and losslessly restored, wherein the first data has a data amount by which a result obtained by lossless encoding of the input audio data of a predetermined data unit does not exceed a maximum bitrate, and the second data and third data form fourth data by which a result obtained by lossless encoding of the input audio data of a same predetermined data unit exceeds the maximum bitrate, and wherein the second data is encoded audio data having a data amount of the maximum bitrate among the fourth data and the third data is encoded audio data of the portion exceeding the maximum bitrate among the fourth data.