| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent audio encoding mechanism for providing higher quality or a lower bit rate.SOLUTION: An audio encoder includes audio signal analysis parts 516, 520, a window function controller 504, a window setting part 502, and processors 508, 512 for obtaining an encoded audio signal. The window function controller, when transient is detected and a harmonic or speech characteristic is not detected by the audio signal analysis parts, switches a window function for a long block to a window function for a short block, and when the transient is detected and the harmonic or speech characteristic is detected by the audio signal analysis parts, does not perform switching to the window function for the short block. |
