公开(公告)号：US5890119A

公开(公告)日：1999-03-30

申请号：US784798

申请日：1997-01-16

申请人： Norio Suzuki

发明人： Norio Suzuki

IPC分类号： G10H1/02 ,  G10H1/00 ,  G10H7/00 ,  G10H7/02 ,  G10H7/06 ,  G10K15/02 ,  G10L9/18

CPC分类号： G10H1/0041 ,  G10H7/006 ,  G10H7/06 ,  G10K15/02 ,  G10H2250/095 ,  G10H2250/145 ,  G10H2250/545

摘要： A digital sound generating system is provided which is capable of, in addition to generating a tone (first waveform data), recording or reproducing PCM sound data representing a human voice or sound of a music piece lasting for a relatively long time (second waveform data). To this end, in the tone generating process, tone waveform sample data is read out from a waveform RAM on the basis of address data given from an address calculating section and is then output as an analog signal via an interpolating section and D/A converter. In reproduction of PCM sound data, the PCM sound data supplied via a CPU interface is transferred using the waveform RAM as a buffer and is then supplied outside of the system through a same channel as in the tone generating process. In recording of PCM sound data, a high-frequency-component removing process is performed, by a filtering calculating section, on PCM sound data received via an A/D converter so as to prevent unwanted aliasing noise. The resultant filtered PCM sound data is then transferred using the waveform RAM as a buffer and output via the CPU interface.

摘要翻译： 提供了一种数字声音产生系统，除了生成音调（第一波形数据）之外，还能够记录或再现表示相当长时间的音乐的人声或声音的PCM声音数据（第二波形数据 ）。 为此，在乐音产生处理中，基于从地址计算部分给出的地址数据，从波形RAM读出乐音波形采样数据，然后经由内插部分和D / A转换器作为模拟信号输出 。 在PCM声音数据的再现中，通过CPU接口提供的PCM声音数据使用波形RAM作为缓冲器传送，然后通过与音调产生处理中相同的通道在系统外部提供。 在PCM声音数据的记录中，通过滤波计算部分，经由A / D转换器接收的PCM声音数据执行高频分量去除处理，以防止不想要的混叠噪声。 然后使用波形RAM作为缓冲器传送所得到的经滤波的PCM声音数据，并通过CPU接口输出。

公开(公告)号：US5886277A

公开(公告)日：1999-03-23

申请号：US826430

申请日：1997-03-18

申请人： Kiyomi Takauji

发明人： Kiyomi Takauji

IPC分类号： G10H7/02 ,  G10H7/12 ,  G10H7/00

CPC分类号： G10H7/12 ,  G10H7/02 ,  G10H2250/595

摘要： An electronic musical instrument having a waveform memory of a relatively small capacity for storing waveform information similar to conventional waveform information, the waveform memory being compatible with any data reading scheme. The waveform information is stored in the form of a plurality of frames. Each frame includes a plurality of pieces of sampled waveform data compressed by ADPCM or the like and decode information for extending the sampled waveform data to be read next to the current frame. Storing the decode information in a frame for extending the sampled waveform data stored in frames before and after that frame makes it possible to extract the necessary decode information from the frame read immediately before regardless of whether the frames are read forward or backward.

摘要翻译： 一种具有相对较小容量的用于存储类似于常规波形信息的波形信息的波形存储器的电子乐器，所述波形存储器与任何数据读取方案兼容。 波形信息以多个帧的形式存储。 每个帧包括由ADPCM等压缩的多个采样波形数据片段和用于扩展在当前帧旁边要被读取的采样波形数据的解码信息。 将解码信息存储在用于扩展存储在该帧之前和之后的帧中的采样波形数据的帧中，使得可以从紧接着读取的帧中提取必要的解码信息，而不管帧是正向还是向后读取。

公开(公告)号：US5880390A

公开(公告)日：1999-03-09

申请号：US935542

申请日：1997-09-23

申请人： Hideki Hagiwara

发明人： Hideki Hagiwara

IPC分类号： G10H1/00 ,  G10H7/02 ,  G10K15/10 ,  G10H1/02 ,  H03G3/00

CPC分类号： G10H1/0091 ,  G10H7/02 ,  G10K15/10 ,  G10H2210/281 ,  Y10S84/26

摘要： In a reverberation effect imparting apparatus, sampled data of an input signal is written into a RAM 23 and the data is read out after an elapse of a predetermined time period, thereby imparting a reverberation effect. A storage area of the RAM 23 is divided into an area 1 for storing waveform data and an area 2 for imparting a reverberation effect. During evaluation, the waveform data is sequentially read out from the area 1 by using an absolute address, and sampled data of the waveform data is written into and read out from the area 2 by using a relative address, thereby imparting a reverberation effect.

摘要翻译： 在混响效果赋予装置中，将输入信号的取样数据写入RAM23，经过预定时间段后读出数据，从而产生混响效果。 RAM23的存储区域被分成用于存储波形数据的区域1和用于赋予混响效果的区域2。 在评估过程中，通过使用绝对地址从区域1顺序地读出波形数据，通过使用相对地址将波形数据的采样数据写入区域2并从区域2中读出，从而产生混响效果。

公开(公告)号：US5869781A

公开(公告)日：1999-02-09

申请号：US840898

申请日：1997-04-17

申请人： Mitsuhiro Kurata

发明人： Mitsuhiro Kurata

IPC分类号： G10H1/02 ,  G10H1/04 ,  G10H1/057 ,  G10H1/12 ,  G10H7/00 ,  G10H7/02 ,  G10H1/06

CPC分类号： G10H7/004 ,  G10H1/04 ,  G10H1/0575 ,  G10H1/125 ,  G10H7/02 ,  G10H2250/621

摘要： A tone signal generator includes a tone signal data generating device, a signal data generating device, and a sound effects imparting device, such as a digital signal processor. The sound effects are imparted to the tone signal data based on the signal data in such a way that the digital signal processor processes the tone signal data and the signal data by repeatedly multiplying and adding them. In the process, a signal data supplying device supplies the tone signal data to the signal data generating device so that the tone signal data is used in place of the signal data. The digital signal processor processes the first tone signal data generated by the tone signal generating device and the second tone signal device supplied by the signal data supplying device so that the sound effects are imparted to the first tone signal data based on the second tone signal data.

摘要翻译： 音调信号发生器包括音调信号数据产生装置，信号数据产生装置和诸如数字信号处理器的声音效果赋予装置。 声音效果基于信号数据被赋予音调信号数据，使得数字信号处理器通过重复乘以它们来处理音调信号数据和信号数据。 在该过程中，信号数据提供装置将音调信号数据提供给信号数据产生装置，以便使用音调信号数据代替信号数据。 数字信号处理器处理由音频信号产生装置产生的第一音调信号数据和由信号数据提供装置提供的第二音调信号装置，使得基于第二音调信号数据将声音效果赋予第一音调信号数据 。

公开(公告)号：US5847302A

公开(公告)日：1998-12-08

申请号：US471737

申请日：1995-06-06

申请人： Shigenori Morikawa ,  Kohtaro Hanzawa ,  Hiroyuki Sasaki ,  Hiroshi Morokuma

发明人： Shigenori Morikawa ,  Kohtaro Hanzawa ,  Hiroyuki Sasaki ,  Hiroshi Morokuma

IPC分类号： G10H7/00 ,  G10H1/00 ,  G10H1/18 ,  G10H7/02 ,  G10H7/04 ,  G10G7/02

CPC分类号： G10H1/0041 ,  G10H1/0033 ,  G10H1/186 ,  G10H7/02 ,  G10H7/04 ,  G10H2250/325 ,  Y10S84/18

摘要： An electronic musical instrument comprises a tone generator for generating a plurality of different digital waveform signals corresponding to different timbres, and a device for setting a plurality of ranges defined by two parameters, a first one of the parameters being a pitch parameter and a second one of the parameters being a key touch parameter. The parameters vary according to the musical performance, and a range for the pitch parameter in combination with a range for the key touch parameter respectively designating one of the plurality of different digital waveform signals having different timbres. An input device is provided for inputting the two parameters according to a musical performance. A judging device judges a respective range to which each of the inputted two parameters belongs, and a selector selects one of the plurality of digital waveform signals from the setting device corresponding to a judged result to generate one of the plurality of different digital waveform signals from the tone generator, the plurality of different digital waveform signals thereby being selectively generated in order to output a sound having a corresponding timbre in response to the two parameters thus inputted.

公开(公告)号：US5831193A

公开(公告)日：1998-11-03

申请号：US666671

申请日：1996-06-18

申请人： Hideo Suzuki ,  Motoichi Tamura

发明人： Hideo Suzuki ,  Motoichi Tamura

IPC分类号： G10H7/00 ,  G10H7/02 ,  G06F7/38 ,  G06F17/10 ,  G10H1/08 ,  G10H7/12

CPC分类号： G10H7/02 ,  G10H7/002 ,  G10H2230/041 ,  G10H2240/056 ,  G10H2250/621 ,  G10H2250/635

摘要： The number of waveform samples per unit time, i.e., waveform sample forming resolution is variably set depending on characteristics of a tone to be generated, such as construction of harmonic components in the tone. The number of waveform samples per unit time is increased for a tone or portion (e.g., attack portion) of a tone containing a relatively great number high-order harmonic components. Conversely, for a tone or portion (e.g., sustain portion) of a tone containing fewer high-order harmonic components, the number of waveform samples per unit time is decreased. By thus variably setting the waveform sample resolution, a process for arithmetically forming waveform sample data can be performed efficiently without involving significant waste. In cases where a plurality of tone generating channels are provided, the waveform sample forming resolution may be variably set independently for each of the channels. Also, in applications where the waveform sample data are to be stored in a waveform memory, effective data compression can be achieved by storing the waveform data with the waveform sample forming resolution variably set for each of different waveform segments.

摘要翻译： 每单位时间的波形采样数，即波形采样形成分辨率，根据音调的特性，例如音调中的谐波成分的构造，可变地设定。 对于包含相对大数量的高次谐波分量的音调或部分（例如，攻击部分），每单位时间的波形样本的数量增加。 相反，对于包含更少高次谐波分量的音调的音调或部分（例如，维持部分），每单位时间的波形样本数减少。 通过可变地设置波形采样分辨率，可以有效地执行用于算术形成波形采样数据的过程，而不会造成重大的浪费。 在提供多个音调生成通道的情况下，波形采样形成分辨率可以针对每个声道独立地可变地设置。 此外，在将波形采样数据存储在波形存储器中的应用中，可以通过以波形样本形成分辨率存储波形数据来实现有效的数据压缩，波形采样形成分辨率可针对不同波形段进行变化设置。

公开(公告)号：US5817964A

公开(公告)日：1998-10-06

申请号：US838676

申请日：1997-04-09

申请人： Taichi Kosugi

发明人： Taichi Kosugi

IPC分类号： G10H7/02 ,  G10H7/08 ,  G06F7/38 ,  G10H7/12

CPC分类号： G10H7/08 ,  G10H7/02 ,  G10H2250/621

摘要： Waveform memory (12) stores a plurality of consecutive waveform sampling value data at a single address. Even when some waveform sampling values are skipped in a process of reproducing a musical tone of a frequency higher than a pitch inherent to a waveform prestored in the memory (12), all of the consecutive sampling values are sequentially read out and stored in temporary storage means (40.about.46) so that the interpolation calculation is accurately performed using the consecutive sampling values.

摘要翻译： 波形存储器（12）在单个地址存储多个连续波形采样值数据。 即使在再现高于预先存储在存储器（12）中的波形固有的音高的音调的过程中跳过某些波形采样值时，所有连续采样值被依次读出并存储在临时存储器中 装置（40差异46），使得使用连续采样值来精确地执行插值计算。

公开(公告)号：US5813027A

公开(公告)日：1998-09-22

申请号：US613261

申请日：1996-03-08

申请人： Gregg D. Lahti ,  Gary D. Hicok ,  Scott E. Harrow

发明人： Gregg D. Lahti ,  Gary D. Hicok ,  Scott E. Harrow

IPC分类号： G06F12/08 ,  G10H7/02 ,  G06F12/00

CPC分类号： G10H7/02 ,  G06F12/0875 ,  G10H2230/031 ,  G10H2250/571

摘要： A method for storing and transferring wave table audio samples from system memory to a cache unit. The method creates a linked-list of pages in system memory for storing the audio sample. The linked-list is actually a pointer list indicating the locations in system memory where the audio samples are stored. A Digital Signal Processor (DSP) is able to translate the starting address of the pointer list to retrieve a requested audio sample from the system memory. The requested audio sample is then transferred to the cache unit where the DSP is able to retrieve audio samples in a linear fashion at a rate much faster than individually fetching the required portions of the audio sample from the main memory of the system.

摘要翻译： 一种用于将波形表音频样本从系统存储器存储并传送到高速缓存单元的方法。 该方法在系统存储器中创建用于存储音频样本的页面的链接列表。 链表实际上是指示存储音频样本的系统存储器中的位置的指针列表。 数字信号处理器（DSP）能够转换指针列表的起始地址以从系统存储器检索所请求的音频样本。 然后将所请求的音频样本传送到高速缓存单元，其中DSP能以线性方式以比从系统的主存储器单独提取音频样本的所需部分快得多的速率检索音频样本。

公开(公告)号：US5794021A

公开(公告)日：1998-08-11

申请号：US483619

申请日：1995-06-07

申请人： Larry D. Hewitt

发明人： Larry D. Hewitt

IPC分类号： G06F3/16 ,  G06F7/02 ,  G06F9/38 ,  G10H1/00 ,  G10H1/12 ,  G10H7/00 ,  G10H7/02 ,  H03K23/68 ,  H03M3/02 ,  H03M7/32 ,  G06F1/08

CPC分类号： G06F3/16 ,  G06F7/026 ,  G06F9/3869 ,  G10H1/0066 ,  G10H1/125 ,  G10H7/002 ,  G10H7/02 ,  H03K23/68 ,  G10H2220/315 ,  G10H2230/035 ,  G10H2240/311 ,  G10H2250/191 ,  G10H2250/545 ,  G10H2250/571 ,  G10H2250/605 ,  G10H2250/611

摘要： A method and circuit for generating a selectively variable clock signal from one of 256 frequencies within a specified range from two fixed frequency oscillator source signals is provided. The method and circuitry maintain a substantially fifty-percent duty cycle in the output clock signal.

摘要翻译： 提供一种用于从两个固定频率振荡器源信号的指定范围内的256个频率之一产生选择性可变时钟信号的方法和电路。 该方法和电路在输出时钟信号中保持大致百分之五十的占空比。

公开(公告)号：US5777249A

公开(公告)日：1998-07-07

申请号：US548434

申请日：1995-10-26

申请人： Hideo Suzuki

发明人： Hideo Suzuki

IPC分类号： G10H7/08 ,  G10H5/00 ,  G10H7/00 ,  G10H7/02 ,  G10H1/00 ,  G10H1/02

CPC分类号： G10H7/00 ,  G10H5/007 ,  G10H2250/515 ,  G10H2250/521 ,  G10H2250/601

摘要： An electronic musical instrument comprises an analysis section, an excitation-waveform memory and a synthesis section. In the analysis section, difference data, which are calculated between target-sound data and output of an analysis loop, are subjected to compressive coding to produce compressed data. The compressed data are stored in the excitation-waveform memory as excitation-waveform data. The analysis loop, containing at least a delay circuit, is driven by an excitation signal which is produced by expanding the compressed data. In the synthesis section, the excitation-waveform data, read out from the excitation-waveform memory, are expanded; and expanded data are added to output of a synthesis loop, containing at least a delay circuit, so as to produce musical tone data representative of a musical tone to be generated. By arbitrarily selecting coefficients for compression and expansion which are respectively performed in the analysis section and synthesis section , the musical tone data are controlled to be an equivalence of the target-sound data. Further, the excitation-waveform memory is designed to merely store compressed excitation-waveform data, so capacity required for the memory can be reduced.

摘要翻译： 电子乐器包括分析部分，激励波形存储器和合成部分。 在分析部分中，将在目标声音数据和分析循环的输出之间计算的差分数据进行压缩编码以产生压缩数据。 压缩数据作为激励波形数据存储在激励波形存储器中。 包含至少延迟电路的分析回路由通过扩展压缩数据产生的激励信号驱动。 在合成部分中，从激励波形存储器读出的激励波形数据被扩展; 扩展数据被添加到包含至少延迟电路的合成循环的输出，以产生表示要生成的乐音的乐音数据。 通过分别在分析部分和综合部分中执行的任意选择压缩和扩展的系数，将乐音数据控制为目标声音数据的等价物。 此外，激励波形存储器被设计为仅存储压缩的激励波形数据，因此可以减少存储器所需的容量。