| 摘要 |
<p>A digital coding process for transmitting and/or storing acoustic signals, in particular musical signals, in which N pick-up values of the acoustic signal are transformed into M spectral coefficients. The process is characterised by the fact that in a first stage the M spectral coefficients are quantified. After coding, an optimal coder checks the number of bits necessary for reproduction. If the number of bits is above a predetermined number, the quantification and coding are repeated in further stages until the number of bits necessary for reproduction no longer exceeds the predetermined number of bits. The required quantification stage is transmitted or stored in addition to the data bits. The advantage of the process is that acoustic signals in particular musical signals, can be transmitted and/or recorded without any subjective quality reduction of the musical signals with a reduction of data rate by factors of 4 to 6.</p> |
