バイノーラル再生音の音像知覚に高能率符号化が及ぼす影響(<特集>バーチャルリアリティと心理学)

抄録

In a network telecommunication system, the binaural technique is promising for transmitting spatial information of a sound, i. e., the direction and the distance of a sound source. In such a system, however, data compression of sound signal is usually required due to restricted bandwidth of a channel. The effects of the data compression on the perception of a sound image were examined in this article when TwinVQ (Transform domain Weighted Interleave Vector Quantization) was used as audio coding. Experimental results showed that the right-left direction of the image was preserved correctly although front-back confusion tended to increase. Moreover, the sound image was broadened by the coding.