| 摘要 |
<p>PURPOSE: A coding method of audio data by using a band expanding method and a device thereof, and a decoding method and a device thereof are provided to use a Huffman coding method to reduce a calculation during a bit packing/unpacking process. CONSTITUTION: A coding device band expand-codes audio data, outputs band restricted audio data, and generates band expanding information(1001). The coding device performs a Huffman coding process in a layer structure having a base layer and at least one enhancement layer to control a bit rate of the band restricted data(1002-1004). The coding device multiplexes the Huffman-coded band restricted audio data and the band expanding information(1005).</p> |
