| 摘要 |
<p>Disclosed is an audio playback device (100), which decodes and plays back a stream containing basic CODEC, whereby noise generation can be avoided without markedly increasing the quantity of calculations even with multi-channel situations, and which is equipped with a stream separator (101), which separates a stream into basic CODEC and band expansion data, a basic CODEC analyzer (102), which analyzes the basic CODEC, a basic CODEC decoder (103), which decodes the basic CODEC according to basic CODEC analysis data, a band expansion data analyzer (104), which analyzes the band expansion data, a first band expansion processor (106), which uses the band expansion data to spread the decoded basic CODEC signal, a second band expansion processor (107), which uses the band expansion data to spread the decoded basic CODEC signal with higher precision than the first band expansion processor (106), and a switch (109), which switches between the first band expansion processor (106) and the second band expansion processor (107) based on the basic CODEC analysis data.</p> |
