| 摘要 |
Herein disclosed is an acoustic signal encoding device comprising: a coefficient table ( 17 ) having described therein coefficients representable in the form of a matrix with 2 rows by N columns simulating head-related transfer characteristics to be applied when a multi-channel signal is reproduced, a first signal outputting unit ( 12 ) for downmixing a N-channel frequency domain signal to have a 2-channel downmixed signal outputted therethrough in accordance with the coefficient table ( 17 ), and a second signal outputting unit ( 14 ) for generating subsidiary information to be used to reconstruct a multi-channel signal based on the 2-channel downmixed signal, thereby making it possible for the downmixed signal to be filtered in accordance with a desired transfer function, and thus enabling the acoustic signal decoding device to reproduce the original multi-channel spatial information simply by reproducing the first coded signal, and the original multi-channel signal by reproducing the first coded signal with the aid of the second coded signal.
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