| 摘要 |
<p>A signal encoding device which encodes acoustic signals is provided with a conversion circuit (601) which converts inputted acoustic signals into frequency components, signal component separation circuit (602) which separates the output of the circuit (602) into tone and noise components, tone component encoding circuit (603) which encodes tone-component signals, and noise component encoding circuit (604) which encodes noise-component signals. The encoding efficiency of the signal encoding device is improved without deteriorating the tone quality of the tonal acoustic signals, because the circuit (603) encodes (601) the signal components of the tone-component signals into codes having different code lengths.</p> |
