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108 records (took 0.03 seconds)

    31.
    发明专利
    未知

    公开(公告)号：AT520122T

    公开(公告)日：2011-08-15

    申请号：AT99923967

    申请日：1999-06-08

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI ,  YASUNAGA KAZUTOSHI

    IPC: G10L19/12 ,  G10L19/00 ,  G10L19/04 ,  H03M7/30

    Abstract: First codebook 61 and second codebook 62 respectively have two subcodebooks, and in respective codebooks, addition sections 66 and 67 obtain respective excitation vectors by adding sub-excitation vectors fetched from respective two subcodebooks. Addition section 68 obtains an excitation sample by adding those excitation vectors. According to the aforementioned constitution, it is possible to store sub-excitation vectors with different characteristics in respective sub-codebooks. Therefore, it is possible to correspond to input signals with various characteristics, and achieve excellent sound qualities at the time of decoding.

    APPARATUS AND METHOD FOR SPEECH CODING
    36.
    发明专利
    APPARATUS AND METHOD FOR SPEECH CODING 未知

    公开(公告)号：CA2722110A1

    公开(公告)日：2001-03-01

    申请号：CA2722110

    申请日：2000-08-23

    Applicant: PANASONIC CORP

    Inventor： YASUNAGA KAZUTOSHI ,  MORII TOSHIYUKI

    IPC: G10L19/083 ,  G10L19/09 ,  G10L19/16

    Abstract: A speech encoder comprising an LPC synthesizing means, a gain calculating means and a parameter coding means for performing predictive coding of gains of an adaptive excitation vector and a stochastic excitation vector associated with indexes searched in the gain calculating means is provided. The parameter coding means comprises prediction coefficient adjusting means for adjusting one or more prediction coefficients used in the predictive coding according to one or more past subframe states. The speech encoder automatically adjusts prediction coefficients when the state value in a preceding subframe is an extremely large value or an extremely small value in predictive quantization with less including local abnormal sounds.

    VECTOR QUANTIZATION APPARATUS, VECTOR DEQUANTIZATION APPARATUS AND THE METHODS
    37.
    发明专利
    VECTOR QUANTIZATION APPARATUS, VECTOR DEQUANTIZATION APPARATUS AND THE METHODS 未知

    公开(公告)号：CA2701757C

    公开(公告)日：2016-11-22

    申请号：CA2701757

    申请日：2008-10-10

    Applicant: PANASONIC CORP

    Inventor： SATOH KAORU ,  MORII TOSHIYUKI ,  EHARA HIROYUKI

    IPC: G10L19/038 ,  G10L19/00 ,  G10L19/02 ,  G10L19/032 ,  G10L19/07 ,  G10L19/16 ,  G10L19/18

    Abstract: A vector quantizer which improves the accuracy of vector quantization in switching over a vector quantization codebook on a first stage depending on the type of feature having the correlation with a quantization target vector. In the vector quantizer, a classifier (101) generates classification information representing a type of narrowband LSP vector having the correlation with wideband LSP (Line Spectral Pairs) out of the plural types. A first codebook (103) selects one sub-codebook corresponding to the classification information as a codebook used for the quantization of the first stage from plural sub-codebooks (CBa1 to CBan) corresponding to each of the types of narrowband LSP vectors. A multiplier (107) multiplies the quantization residual vector of the first stage inputted from an adder (104) by a scaling factor corresponding to the classification information out of plural scaling factors stored in a scaling factor determining section (106) and outputs it to an adder (109) as the quantization target of a second stage.

    MULTI-STAGE VECTOR QUANTIZATION FOR SPEECH ENCODING
    38.
    发明专利
    MULTI-STAGE VECTOR QUANTIZATION FOR SPEECH ENCODING 未知

    公开(公告)号：CA2684452C

    公开(公告)日：2014-01-14

    申请号：CA2684452

    申请日：1998-10-22

    Applicant: PANASONIC CORP

    Inventor： YASUNAGA KAZUTOSHI ,  MORII TOSHIYUKI

    IPC: G10L19/038 ,  G10L19/04 ,  G10L19/10 ,  G10L19/107 ,  G10L19/12

    Abstract: The present invention provides a vector quantization apparatus and method for a parameter vector obtained by an LPC analysis of an input speech signal, the apparatus comprising an LPC analyzing section, a conversion section, a target vector extracting section, a first quantizing section that performs a first stage of the coding of the target vector using a first code vector stored in a first codebook, an amplifier storing section, and a second quantizing section, wherein the amplifier storing section outputs the scalar predetermined to be used, when the first code vector is used in the second quantizing section. The apparatus and method provided an improvement in the subjective quality and also the object of value of a coded or decoded speech. The present apparatus and method may be used and applied to the low bit rate speech coding technique used in a cellular phone, or a music coder or an image coder.

    A SPEECH CODER USING AN ORTHOGONAL SEARCH AND AN ORTHOGONAL SEARCH METHOD
    39.
    发明专利
    A SPEECH CODER USING AN ORTHOGONAL SEARCH AND AN ORTHOGONAL SEARCH METHOD 未知

    公开(公告)号：CA2684379C

    公开(公告)日：2014-01-07

    申请号：CA2684379

    申请日：1998-10-22

    Applicant: PANASONIC CORP

    Inventor： YASUNAGA KAZUTOSHI ,  MORII TOSHIYUKI

    IPC: G10L19/12 ,  G10L19/10 ,  G10L19/107

    Abstract: A speech coder using an orthogonal search and an orthogonal search method for reducing the number of calculation steps for vector quantization processing for ACELP type random codebook. The speech coder comprises an adaptive codebook, that generates an adaptive codevector representing a pitch component, a random codebook that generates a codevector representing a random component, a synthesis filter that generates a synthetic speech signal and a distortion calculator that calculates distortion between an input speech signal and the synthetic speech signal. The speech coder and the orthogonal search method have characteristics in which the accuracy for the random codebook search is improved as compared with a non-orthogonal search and the quality of the synthetic speech is also improved.

    Dispositivo de codificación y método de codificación
    40.
    发明专利
    Dispositivo de codificación y método de codificación 未知

    公开(公告)号：ES2404408T3

    公开(公告)日：2013-05-27

    申请号：ES08720311

    申请日：2008-02-29

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI ,  OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

    IPC: G10L19/02 ,  G10L19/038 ,  G10L19/10 ,  G10L25/18

    Abstract: Un aparato de codificación que comprende: una sección de 5 cuantificación de forma que codifica una forma de un espectro de frecuencia de audio; y una sección de cuantificación de ganancia que codifica una ganancia del espectro de frecuencia de audio,caracterizado por que la sección de cuantificación de forma comprende: una sección de búsqueda de intervalo que busca una primera forma de onda fija en cada una de unapluralidad de bandas de frecuencia que dividen un intervalo de búsqueda de frecuencia predeterminado; yuna sección de búsqueda minuciosa que busca segundas formas de onda fijas sobre una totalidad delintervalo de búsqueda de frecuencia predeterminado.

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