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1. 发明专利

JP3378066B2 Musical tone synthesizing apparatus 失效
公开(公告)号：JP3378066B2
公开(公告)日：2003-02-17
申请号：JP31605493
申请日：1993-11-22
申请人：ローランド株式会社
发明人：真紀山本
IPC分类号： G10H5/00 , G10H1/00 , G10H5/10

2. 发明专利

JPH11505828A 失效
公开(公告)号：JPH11505828A
公开(公告)日：1999-05-25
申请号：JP53552096
申请日：1995-05-26
IPC分类号： A61K31/445 , A61K31/195 , A61K31/40 , A61K31/46 , A61K45/06 , A61P25/00 , A61P25/16 , G10H5/10

3. 发明专利

JP2812229B2 失效
公开(公告)号：JP2812229B2
公开(公告)日：1998-10-22
申请号：JP412195
申请日：1995-01-13
IPC分类号： G10H5/10 , G10H1/057 , G10H1/06 , G10H7/08 , G10L13/00 , G10L9/02

4. 发明专利

JPH08194484A VOICE AND MUSICAL TONE SYNTHESIZING DEVICE 失效
公开(公告)号：JPH08194484A
公开(公告)日：1996-07-30
申请号：JP412195
申请日：1995-01-13
申请人： YAMAHA CORP
发明人： KOYAMA MASAHIRO , NAKAJIMA YASUYOSHI
IPC分类号： G10H5/10 , G10H1/057 , G10H1/06 , G10H7/08 , G10L13/00 , G10L9/02
摘要： PURPOSE: To facilitate control of sound emission by sending a sound emission start signal and sound pitch information only to a specific waveform generating means for transferring the sound emission start signal and pitch information from that specific waveform generating means to other waveform generating means. CONSTITUTION: A control part 3 captures a sound emission channel continued for the number of Formants corresponding to the specified tone out of the provided empty channels, sends a pitch synch. control signal to the pitch synch. control contact psYN so that the leading sound emission channel is put in the pitch asynchronous condition, puts the other capture sound emission channel(s) in the pitch synch. condition, and sends the center frequency information of Formant to each center frequency input contact FC. The Formant pitch information given to a pitch information input contact P1CH is fed to a pitch information output contact H and transferred to another pitch information input contact EXTPIN. The Formant pitch information is transferred to the pitch information input contact EXTPIN of the sound emission channel at the following stage.

5. 发明专利

JPH06103438B2 失效
公开(公告)号：JPH06103438B2
公开(公告)日：1994-12-14
申请号：JP21998291
申请日：1991-08-30
IPC分类号： G10H1/043 , G10H1/057 , G10H1/06 , G10H1/14 , G10H5/10 , G10H5/12
摘要： Variable frequency sawtooth waveforms are often utilized as an excitation signal in a digital musical synthesizer. A problem exists at lower sampling rates in such systems due to an aliasing problem which occurs at frequencies near the Nyquist rate. Low pass filtering may be utilized to mask this problem; however, low pass filtering is very time consuming to implement in a digital signal processor. The method and apparatus of the present invention reduces the upper harmonic content of a sawtooth waveform by proportionally converting the sawtooth waveform to a triangle waveform in response to variations in the frequency of the sawtooth waveform. This is accomplished by adding a selectable offset to the sawtooth waveform and then taking the absolute value of the resultant waveform. By restoring this waveform to a zero offset, the sawtooth waveform excitation signal will be converted to a triangle waveform having a substantially reduced upper harmonic content. By varying the selectable offset in response to variations in the frequency of the sawtooth waveform, it is possible to efficiently vary the amount of conversion which occurs.

6. 发明专利

JPH04346502A NOISE GENERATING DEVICE 失效
公开(公告)号：JPH04346502A
公开(公告)日：1992-12-02
申请号：JP14808491
申请日：1991-05-24
申请人： YAMAHA CORP
发明人： NISHIMOTO TETSUO
IPC分类号： G10H5/10 , G06F7/58 , G10H7/08 , G10L13/00 , H03B29/00 , H03K3/84
摘要： PURPOSE:To attain the fine control of the noise formant characteristic by giving the independent control to a skirt part and the band width of the noise formant characteristic on a simple constitution. CONSTITUTION:The white noise signal produced by a white noise generator 2 is transmitted through an LPF circuit part 3 and a relative noise generating part 16. Thus the frequency characteristic of the white noise signal is controlled according to the frequency characteristic of both parts 3 and 16 which are set independently of each other. A periodic waveform generating part 31 produces a periodic waveform having a frequency corresponding to the center frequency of a desired noise formant. A modulating multiplier 36 modulates a relevant periodic waveform signal with the noise signal undergone the control of its frequency characteristic. Then, the components of the noise signal emerge symmetrically at both sides bands of the formant center frequency. Thus the noise formant is obtained. The characteristic of a skirt part of the noise formant is controller with control of the frequency characteristic of the part 3. Meanwhile the band width characteristic of the noise formant is controlled with the characteristic of the part 16.

7. 发明专利

JPH03293700A SOUND SYNTHESIZER 失效
公开(公告)号：JPH03293700A
公开(公告)日：1991-12-25
申请号：JP40936890
申请日：1990-12-28
申请人： RAYTHEON CO
发明人： POORU EI ROOZENSUTORATSUKU , MAIKERU EI DEIIETSUTO
IPC分类号： G10H5/10 , G10H7/00 , G10K15/02 , G10L19/08 , H03M7/30
摘要： PURPOSE: To synthesize unsteady sound continuing for several hours by separting conspicuous sound characteristics and indicating them by parameters through a probable model. CONSTITUTION: A timing pulse generator 81 generates pulses for every T milliseconds corresponding to block time and a successive block number generator 82 decides which block memory sector is selected inside a block memory 83. A cumulative probability provided by the sector is provided to a comparator 62, the other input is provided by a random number generator 63 and a cluster number and the cumulative probability of a block (k+1) or the like are provided. The LPC coefficient of the block (k) included inside a memory 70 is selected by the cluster number and the block (k) from the memory 83 and provided to an LPC recursive synthesizer filter 84 for providing a desired transient synthetic symbol for the output. Thus, the unsteady sound continuing for several hours is synthesized.

8. 实用新型

JPS61182570U 失效
公开(公告)号：JPS61182570U
公开(公告)日：1986-11-14
申请号：JP6523385
申请日：1985-04-30
IPC分类号： G09B15/04 , G10H5/10

9. 发明专利

JPS6019545B2 失效
公开(公告)号：JPS6019545B2
公开(公告)日：1985-05-16
申请号：JP5913278
申请日：1978-05-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： HIDA TOSHIO , SUGIURA TOSHIO , ISHII KENJI , TANIGUCHI TAKASHI
IPC分类号： G10H5/00 , G06G7/26 , G10H5/10

10. 实用新型

JPS5913672Y2 JPS5913672Y2 - 失效
公开(公告)号：JPS5913672Y2
公开(公告)日：1984-04-23
申请号：JP16228977
申请日：1977-12-03
IPC分类号： G10H5/00 , G10H5/10 , H03K4/08 , H03K4/90

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