利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.012 秒)

    METHOD AND DEVICE FOR GENERATING TRIANGULAR WAVES
    1.
    发明公开
    METHOD AND DEVICE FOR GENERATING TRIANGULAR WAVES 审中-公开
    方法和器具，用于产生三角波

    公开(公告)号：EP2137721A1

    公开(公告)日：2009-12-30

    申请号：EP08714255.0

    申请日：2008-03-17

    申请人： QUALCOMM Incorporated

    发明人： MOLLOY, Stephen ,  DEVALAPALLI, Suresh ,  KAMATH, Nidish Ramachandra

    IPC分类号： G10H7/12

    CPC分类号： G10H7/12 ,  G10H2210/205 ,  G10H2210/211

    摘要： This disclosure describes techniques for generating a set of data points that form a triangular wave having a desired gain and a desired frequency. In one example, the method includes the step of (a) determining an increment value based on the desired frequency and the desired gain of the triangular wave. The method further includes the step of (b) adding the increment value to a current data point to generate a next data point, the current data point and the next data point forming a subset of the set of data points. The method further includes the step of iteratively performing (a) and (b) to generate the set of data points that form the triangular wave.

    Musical tone generating apparatus
    4.
    发明公开
    Musical tone generating apparatus 失效
    音乐发生器

    公开(公告)号：EP0548045A3

    公开(公告)日：1993-08-25

    申请号：EP93100418.8

    申请日：1987-04-14

    申请人： YAMAHA CORPORATION

    发明人： Suzuki, Hideo ,  Kudo, Masaki ,  Kurakake, Yasushi

    IPC分类号： G10H7/12 ,  H03M3/04

    CPC分类号： H03M3/042 ,  G10H1/0041 ,  G10H1/26 ,  G10H7/12 ,  G10H2250/595 ,  G10H2250/601

    摘要： 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.

    EP0906610A4 -
    5.
    发明公开
    EP0906610A4 - 失效
    CN101607654A - Google专利

    公开(公告)号：EP0906610A4

    公开(公告)日：1999-04-07

    申请号：EP96941317

    申请日：1996-11-08

    IPC分类号： G10H1/16 ,  G10H7/02 ,  G10H7/12 ,  G10H7/00

    CPC分类号： G10H7/02 ,  G10H1/16 ,  G10H7/12 ,  G10H2250/205 ,  G10H2250/561 ,  Y10S84/10

    摘要： A method and apparatus for producing a tone (e.g. for music) without the use of a waveform memory and using a feedback loop. The feedback loop includes a waveform generator which calculates, in real time, a parabolic approximation to a sine wave. The feedback loop includes a delay phase differencer (46) to eliminate hunting. The output waveform from the feedback loop is provided to a sine function generator (74) which approximates a sine value using a third order polynomial, to provide the output tone.

    摘要翻译： 一种用于在不使用波形存储器并使用反馈回路的情况下产生音调（例如用于音乐）的方法和装置。 反馈回路包括一个实时计算正弦波的抛物线近似的波形发生器。 反馈回路包括延迟相位差器（46）以消除振荡。 来自反馈回路的输出波形被提供给正弦函数发生器（74），该正弦函数发生器（74）使用三阶多项式逼近正弦值，以提供输出音调。

    Musical tone generating apparatus
    7.
    发明公开
    Musical tone generating apparatus 失效
    音乐音调生成装置

    公开(公告)号：EP0548046A3

    公开(公告)日：1993-08-25

    申请号：EP93100419.6

    申请日：1987-04-14

    申请人： YAMAHA CORPORATION

    发明人： Suzuki, Hideo ,  Kudo, Masaki ,  Kurakake, Yasushi

    IPC分类号： G10H7/12 ,  H03M3/04

    CPC分类号： H03M3/042 ,  G10H1/0041 ,  G10H1/26 ,  G10H7/12 ,  G10H2250/595 ,  G10H2250/601

    摘要： 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.

    摘要翻译： 公开了一种利用数据压缩方法的乐音产生装置。 乐音被采样并转换成波形数据（S（n））。 这些波形数据（S（n））通过线性预测编码方法并且进一步通过差分量化方法被压缩为压缩数据（C（n））。 每个压缩数据（C（n））的位数因此明显小于波形数据（S（n））的位数。 之后，存储器（2）存储如此压缩的数据，该数据对应于音调的起始部分和音调的维持部分的选定部分。 因此，可以显着减少存储器的存储空间。 当产生乐音时，存储器（2）读出攻击部分的压缩数据（C（n）），然后重复读出所选部分的压缩数据。 读出的压缩数据被顺序解码为原始数字数据。 因此，音乐音调的整个波形被再现。

    Musical tone generating apparatus
    9.
    发明公开
    Musical tone generating apparatus 失效
    Vorrichtung zur Musiktonerzeugung。

    公开(公告)号：EP0241922A2

    公开(公告)日：1987-10-21

    申请号：EP87105545.5

    申请日：1987-04-14

    申请人： YAMAHA CORPORATION

    发明人： Suzuki, Hideo c/o Nippon Gakki ,  Kudo, Masaki c/o Nippon Gakki ,  Kurakake, Yasushi c/o Nippon Gakki

    IPC分类号： G10H7/00 ,  H03M3/04

    CPC分类号： H03M3/042 ,  G10H1/0041 ,  G10H1/26 ,  G10H7/12 ,  G10H2250/595 ,  G10H2250/601

    摘要： 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 dta (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.

    摘要翻译： 公开了一种利用数据压缩方法的乐音产生装置。 对乐音进行采样并转换为波形数据（S（n））。 这些波形数据（S（n））通过线性预测编码方式进一步压缩为压缩dta（C（n）），并进一步通过差分量化方法。 因此，压缩数据（C（n））中的每一个的比特数明显小于波形数据（S（n））的比特数。 此后，存储器（2）存储对应于音调的攻击部分的这样的压缩数据和音调的维持部分的选定部分。 因此，可以显着地减少存储器存储。 当产生乐音时，存储器（2）读出攻击部分的压缩数据（C（n）），然后重复地读出所选择的部分的压缩数据。 读出的压缩数据被顺序地解码成原始的数字数据。 因此，音乐的整个波形被再现。