Patent ID: 6782105
Filing Date: 2004-08-24
Classification: G10K,Y10S

Abstract:
An apparatus for processing an input sound to generate a sequence of reflection sounds along a time axis including an initial reflection sound and subsequent reverberant reflection sounds, the apparatus comprising:a first filter of Finite Impulse Response type being provided with a first set of parameters representing a first distribution pattern of reflection sounds, the first distribution pattern having a first time length sufficient to cover the initial reflection sound and the subsequent reverberant reflection sounds, each parameter determining a first magnitude and a first delay time of each reflection sound such that the reflection sounds are distributed at intervals along the time axis and such that the magnitudes of the reflection sounds gradually decrease along the time axis, the first filter executing convolution operation of sample data of the input sound by the first set of parameters to generate first data containing a sequence of reflection sounds of the input sound; and a second filter of Finite Impulse Response type being provided with a second set of parameters representing a second distribution pattern of additional reflection sounds, the second distribution pattern having a second time length shorter than that of the first distribution pattern and longer than each interval of the reflection sounds, each parameter determining a second magnitude and a second delay time of each additional reflection sound such that the additional reflection sounds are arranged at intervals shorter than those of the reflection sounds, the second filter executing convolution operation of the first data by the second set of parameters to generate second data containing additional reflection sounds which fill the intervals of the reflection sounds of the input sound.