| 摘要 |
<p>A recording area of a recording medium is divided into two regions, one for basic information of a plurality of channels and the other for other additional information. Here, digital audio signals of at least left, center, right, surround left, surround right and sub-woofer channels are recorded as the basic information, and digital audio signals of at least left center and right center channels, their delayed center channels, mixed left channel and mixed right channel are recorded as additional information. When information recorded in either of these regions no longer exists, reproduction is made by using the information of the other region during subsequent reproduction. Further, among the digital audio signals of the eight channels described above (L, LC, C, SW, RC, R, LB, RB), compression/encoding having high auditory sense is applied to signals of the channels having higher auditory influences on the sence of feeling among the six channels (L, LC, C, SW, RC, R) than the other two channels, and encoding having higher compression ratio is applied to the digital audio signals of the two channels (LB, RB). Accordingly, the present invention can apply compression/encoding having high tonal quality to particularly important sounds, and can eliminate the waste of bit allotment quantity (byte allotment quantity).</p> |
