Constant bitrate real-time lossless audio decoder restoring moved excess coded data amounts

摘要

A lossless decoding apparatus restores the losslessly compression encoded audio data on a real-time basis, and a method therefor. The lossless decoding apparatus includes a restorer which restores losslessly compression encoded audio data. The encoded audio data has been divided into first data having a data amount exceeding the maximum bitrate and second data having a data amount less than the maximum bitrate, where the first data is divided into third data being the encoded audio data having a data amount of the maximum bitrate and fourth data being the encoded data of the portion exceeding the maximum bitrate, and where the fourth data is output together with the second data. A bitrate controller controls the input and output of the fourth data into or out of a buffer to combine the fourth data with the corresponding third data to be output to the restorer to be restored with the remaining restored audio data in sequence.