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    VOICE CODING METHOD TO BE USED IN DIGITAL VOICE ENCODER
    2.
    发明专利
    VOICE CODING METHOD TO BE USED IN DIGITAL VOICE ENCODER 失效

    公开(公告)号：JP2000155597A

    公开(公告)日：2000-06-06

    申请号：JP35934599

    申请日：1999-12-17

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A ,  HARTMAN MATTHEW A

    IPC: G10L19/12 ,  H03H17/00 ,  H03H17/02 ,  H03M7/30 ,  H03M7/38 ,  H04B14/04 ,  G10L19/00 ,  G10L19/06

    Abstract: PROBLEM TO BE SOLVED: To provide a digital voice coding method improving controlls of filters of a voice encoder without increasing the complexity of the voice encoder accordingly. SOLUTION: A single filter providing controls of plural filters without complexity of the plural filters is realized by using an R-order filter for modeling frequency responses of the plural filters. The R-order filter can be used as a spectral noise weight filter (132) or the combination of the short term predictive encoder filter called as a synthesis filter in which noise are spectrally weighted and the spectral noise weighting filter in accordance with which embodiments are to be used. Generally, this method performs the moldeling of frequency responses of L pieces of P-order filters with the single R-order filter and, in this case, the order of R is made to be

    EP0556354A4 -
    3.
    发明公开
    EP0556354A4 - 失效
    EP0556354A4 - Google专利

    公开(公告)号：EP0556354A4

    公开(公告)日：1995-07-26

    申请号：EP92917101

    申请日：1992-08-03

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  WINTER ERIC H ,  JASIUK MARK A

    IPC: G10L19/04 ,  G10L19/00 ,  G10L19/06 ,  G10L19/12 ,  G10L19/14 ,  H03M13/35 ,  G10L5/00 ,  G06F11/00

    CPC classification number: G10L19/06 ,  G10L19/135 ,  G10L19/18 ,  H03M13/35

    Abstract: A method for protecting information bits wherein input data bits, at least some of which are to be protected, are sorted based upon information determined from a subset of the input data bits. An error control coding technique is applied to at least some of the sorted bits. In the preferred embodiment, an input data stream of voice coder bits is separated into arrays of bits. A first array (302) comprises voice coder bits needing error protection, with the bits arranged in order of importance determined by voicing mode. The second array (303) comprises bits that will not be error protected. The bits from the first array are provided to the input of an encoder (304), then the encoded bits are combined (305) with the bits from the second array (303) to form a bit stream.

    Abstract translation: 一种用于保护信息比特的方法，其中输入数据比特（其中至少一些将被保护）基于从输入数据比特的子集确定的信息被分类。 对至少一些分类的比特应用差错控制编码技术。 在优选实施例中，话音编码器比特的输入数据流被分成比特阵列。 第一阵列（302）包括需要错误保护的语音编码器位，其中按重要性排列的位按发音模式确定。 第二阵列（303）包含不会被错误保护的位。 将来自第一阵列的比特提供给编码器（304）的输入，然后将编码比特与来自第二阵列（303）的比特组合（305）以形成比特流。

    4.
    发明专利
    未知

    公开(公告)号：ES2167318T3

    公开(公告)日：2002-05-16

    申请号：ES92917101

    申请日：1992-08-03

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  WINTER ERIC H ,  JASIUK MARK A

    IPC: G10L19/00 ,  G10L19/06 ,  G10L19/04 ,  G10L19/12 ,  G10L19/14 ,  H03M13/35

    Abstract: A method for protecting information bits wherein input data bits, at least some of which are to be protected, are sorted based upon information determined from a subset of the input data bits. An error control coding technique is applied to at least some of the sorted bits. In the preferred embodiment, an input data stream of voice coder bits is separated into arrays of bits. A first array (302) comprises voice coder bits needing error protection, with the bits arranged in order of importance determined by voicing mode. The second array (303) comprises bits that will not be error protected. The bits from the first array are provided to the input of an encoder (304), then the encoded bits are combined (305) with the bits from the second array (303) to form a bit stream.

    Vector quantizer method and apparatus
    6.
    发明专利
    Vector quantizer method and apparatus 未知

    公开(公告)号：GB2282943A

    公开(公告)日：1995-04-19

    申请号：GB9422823

    申请日：1994-03-07

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A ,  HARTMAN MATTHEW A

    IPC: G10L19/06 ,  G10L19/083 ,  G10L19/135 ,  G10L25/06 ,  G10L25/24 ,  G10L9/00

    Abstract: A Vector-Sum Excited Linear Predictive Coding (VSELP) speech coder (200) provides improved quality and reduced complexity over a typical speech coder. VSELP uses a codebook (201) which has a predefined structure such that the computations required for the codebook search process can be significantly reduced. This VSELP speech coder uses single or multisegment vector quantizer of the reflection coefficients based on a Fixed-Point-Lattice-Technique (FLAT). Additionally, this speech coder uses a pre-quantizer to reduce the vector codebook search complexity and a high-resolution scalar quantizer to reduce the amount of memory needed to store the reflection coefficient vector codebooks. Resulting in a high quality speech coder with reduced computations and storage requirements.

    Vector sum excited linear predictive coding speech coder
    7.
    发明专利
    Vector sum excited linear predictive coding speech coder 未知

    公开(公告)号：FR2709387A1

    公开(公告)日：1995-03-03

    申请号：FR9410203

    申请日：1994-08-23

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A ,  HARTMAN MATTHEW A

    IPC: G10L19/06 ,  G10L19/083 ,  G10L19/135 ,  G10L25/06 ,  G10L25/24 ,  H04B7/24 ,  G10L9/14 ,  G10L9/18 ,  H04B7/00

    Abstract: The method comprises the steps of segmenting the optimal reflection coefficient vector into two segments, and providing an array of predetermined vectors of coefficients, with each vector having multiple elements. A first vector is selected from the array. The residual error is calculated corresp. to the first selected vector. The above steps are repeated for each vector in the array. A vector is chosen from the first array with the lowest residual error, which defines the initial conditions for the second segment. A second array of predetermined vectors of reflection coefficients are provided, each vector having multiple elements. The above steps are repeated for the second segment, using the second array of vectors so forming a second chosen vector.

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