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    DIGITAL SPEECH CODER HAVING OPTIMIZED SIGNAL ENERGY PARAMETERS
    56.
    发明专利
    DIGITAL SPEECH CODER HAVING OPTIMIZED SIGNAL ENERGY PARAMETERS 未知

    公开(公告)号：CA2065731C

    公开(公告)日：1995-06-20

    申请号：CA2065731

    申请日：1990-10-09

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A ,  JASIUK MARK A

    IPC: G10L19/00 ,  G10L19/08 ,  G10L19/12 ,  G10L9/00

    Abstract: A speech coder and decoder methodology wherein pitch excitation and codebook excitation source energies (100) are represented by parameters that are readily transmissible with minimal transmission capacity requirements. The parameters are the long term energy value, a short term correction factor which is applied to the long term energy value to match the short term energy, and proportionality factor(s) that specify the relative energy contribution of the excitation sources to the short term value (101)

    CONTINUOUS SPEECH RECOGNITION SYSTEM
    57.
    发明专利
    CONTINUOUS SPEECH RECOGNITION SYSTEM 未知

    公开(公告)号：CA1336017C

    公开(公告)日：1995-06-20

    申请号：CA538502

    申请日：1987-06-01

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A

    IPC: G10L15/10 ,  G10L15/14 ,  G10L15/193 ,  G10L5/06

    Abstract: Disclosed is method and arrangement for speech recognition for use in a speech recognition system, wherein a grammar model may be stored in memory, the grammar model being composed of nodes connected by arcs, each arc generally having an associated template prestored in memory and respective originating and terminating grammar nodes, and wherein groups of input frames may be compared to templates to generate similarity measure parameters. The invention includes structuring the grammar model such that arcs may be looped within the structure. For implementing this type of structure, the invention includes providing first parameter storage and second parameter storage for one or more nodes including a terminating node for a selected arc, determining similarity measure parameters for the originating node for the selected arc, determining similarity measure parameters for the arc using a template associated with the arc and the originating node's similarity measure parameters. Further, similarity measure parameters are determined at the terminating node and are stored in the first parameter storage for the terminating node. The first parameter storage contents are transferred to the second parameter storage for the terminating node, and the groups of input frames are recognized using the parameter storage contents associated with the terminating node.

    Method of storing reflection coefficient vectors
    58.
    发明专利
    Method of storing reflection coefficient vectors 未知

    公开(公告)号：FR2709366A1

    公开(公告)日：1995-03-03

    申请号：FR9410202

    申请日：1994-08-23

    Applicant: MOTOROLA INC

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

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

    Abstract: Speech coder with Vector-Sum Excited Linear Predictive (VSELP) Coding having enhanced quality and reduced complexity with respect to the prior art. The VSELP uses a coding table having a predefined structure such that the calculations required for the process of searching in the coding table can be reduced significantly, as well as a vector quantifier with one or more segments of the reflection coefficients on the basis of a Fixed-Point Meshing Technique (FLAT). Moreover, this speech coder uses a prequantifier so as to reduce the complexity of searching in the vector coding table, and a high-resolution scalar quantifier so as to reduce the quantity of storage memory in the reflection coefficient vector coding tables. Thus a high-quality speech coder is obtained with reduced calculations and storage conditions.

    59.
    发明专利
    未知

    公开(公告)号：DE3750199T2

    公开(公告)日：1995-01-19

    申请号：DE3750199

    申请日：1987-06-01

    Applicant: MOTOROLA INC

    Inventor： GERSON IRA A

    IPC: G10L15/193 ,  G10L5/06

    Abstract: Disclosed is method and arrangement for speech recognition for use in a speech recognition system, wherein a grammar model may be stored in memory, the grammar model being composed of nodes connected by arcs, each arc generally having an associated template prestored in memory and respective originating and terminating grammar nodes, and wherein groups of input frames may be compared to templates to generate similarity measure parameters. The invention includes structuring the grammar model such that arcs may be looped within the structure. For implementing this type of structure, the invention includes providing first parameter storage and second parameter storage for one or more nodes including a terminating node for a selected arc, determining similarity measure parameters for the originating node for the selected arc, determining similarity measure parameters for the arc using a template associated with the arc and the originating node's similarity measure parameters. Further, similarity measure parameters are determined at the terminating node and are stored in the first parameter storage for the terminating node. The first parameter storage contents are transferred to the second parameter storage for the terminating node, and the groups of input frames are recognized using the parameter storage contents associated with the terminating node.

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