发明名称 |
Musical tone generating apparatus. |
摘要 |
<p>A musical tone generating apparatus utilizing a data compression method is disclosed. A musical tone is sampled and is converted into waveform data (S(n)). These waveform data (S(n)) are compressed into compressed data (C(n)) by a linear predictive coding method and further by a differential quantization method. The number of bits of each of the compressed data (C(n)) is thus significantly smaller than that of the waveform data (S(n)). Thereafter, a memory (2) stores the thus compressed data corresponding to an attack portion of the tone and a selected part of a sustain portion of the tone. Hence, it is possible to remarkably reduce the memory storage. When generating a musical tone, the memory (2) reads out the compressed data (C(n)) of the attack portion and thereafter repeatedly reads out the compressed data of the selected part. The read-out compressed data are sequentially decoded into the original digital data. Thus, the whole waveform of the musical tone is reproduced. <IMAGE></p> |
申请公布号 |
EP0548045(A2) |
申请公布日期 |
1993.06.23 |
申请号 |
EP19930100418 |
申请日期 |
1987.04.14 |
申请人 |
YAMAHA CORPORATION |
发明人 |
SUZUKI, HIDEO;KUDO, MASAKI;KURAKAKE, YASUSHI |
分类号 |
G10H1/00;G10H1/26;G10H7/12;H03M3/04 |
主分类号 |
G10H1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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