2005 Volume 10 Issue 1 Pages 101-109
The sound field reproduction technique is important to realize the more realistic communication system. However, a transmission data should be reduced for the remote system based on wave field synthesis since the technique usually needs a great number of channel signals. The spatial coding method for moving sound sources is proposed in this paper. In encoding side, the moving source signals are extracted by convolving channel signals to the inverse transfer functions, which are calculated from room transfer functions due to the location of sound sources. In decoding side, channel signals are reconstructed by convolving extracted source signals to the room transfer functions. As a result, the data to be transmitted is reduced from the number of channels to that of sound sources. To evaluate the coding method, a simulated reverberant sound field was synthesized by using an image method. The effect of the coding method on the perceptual quality was evaluated by subjective assessment.
