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    ENCODING DEVICE AND ENCODING METHOD
    41.
    发明专利
    ENCODING DEVICE AND ENCODING METHOD 未知

    公开(公告)号：SG179433A1

    公开(公告)日：2012-04-27

    申请号：SG2012015111

    申请日：2008-02-29

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI ,  OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

    IPC: G10L19/02 ,  G10L19/032 ,  G10L19/10

    Abstract: Provided is an encoding device which can reduce the encoding distortion as compared to the conventional technique and can obtain a preferable sound quality for auditory sense. In the encoding device, a shape quantization unit (111) quantizes the shape of an input spectrum with a small number of pulse positions and polarities. The shape quantization unit (111) sets apulse amplitude width to be searched later upon search of the pulse position to a value not greater than the pulse amplitude width which has been searched previously. A gain quantization unit (112) calculates a gain of a pulse searched by the shape quantization unit (111) for each of bands.Figure 1

    QUANTIZATION DEVICE AND QUANTIZATION METHOD
    42.
    发明专利
    QUANTIZATION DEVICE AND QUANTIZATION METHOD 未知

    公开(公告)号：CA2810995A1

    公开(公告)日：2012-03-22

    申请号：CA2810995

    申请日：2011-09-16

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI

    IPC: G10L19/038 ,  G10L19/00 ,  G10L19/06 ,  G10L19/07 ,  G10L19/12

    Abstract: Provided are a quantization device and quantization method which reduce coding distortion with a small degree of calculation, and achieve adequate coding performance thereby. A multistage vector quantization unit (102) treats a number of candidates N which are designated prior to operation in the first-stage vector quantization unit (201-1), decrements the number of candidates by one beginning with the second-stage vector quantization unit (201-2 - 201-J) and continuing with each stage thereafter, and, if the number of candidates is three or less, assesses the quantization distortion at each such stage, treating the number of candidates at the following stage as a predetermined value P if the quantization distortion is greater than a prescribed threshold, and treating the number of candidates at the following stage as a value Q that is less than the predetermined value P if the quantization distortion is less than or equal to the predetermined threshold.

    46.
    发明专利
    未知

    公开(公告)号：DE60043601D1

    公开(公告)日：2010-02-04

    申请号：DE60043601

    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: LPC synthesizing means for obtaining a synthesized speech by filtering adaptive excitation vector and stochastic excitation vector stored in an adaptive codebook and stochastic codebook using an LPC coefficients obtained from an input speech; gain calculating means for calculating gains of said adaptive excitation vector and said stochastic excitation vector and searching code of the adaptive excitation vector and searching code of the stochastic excitation vector using coding distortion between said input speech and said synthesized speech obtained using said gains: and parameter coding means for performing predictive coding of gains using the adaptive excitation vector and stochastic excitation vector corresponding to the codes obtained, wherein said parameter coding means comprises prediction coefficient adjusting means for adjusting one or more prediction coefficients used for said predictive coding according to one or more states of a previous subframe.

    VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND THE METHODS
    47.
    发明专利
    VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND THE METHODS 未知

    公开(公告)号：CA2701757A1

    公开(公告)日：2009-04-16

    申请号：CA2701757

    申请日：2008-10-10

    Applicant: PANASONIC CORP

    Inventor： SATOH KAORU ,  MORII TOSHIYUKI ,  EHARA HIROYUKI

    IPC: G10L19/14 ,  G10L19/00 ,  G10L19/02 ,  G10L19/032 ,  G10L19/06 ,  G10L19/07 ,  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.

    Audio encoding device and audio encoding method
    48.
    发明专利
    Audio encoding device and audio encoding method 未知

    公开(公告)号：AU2008283697A1

    公开(公告)日：2009-02-05

    申请号：AU2008283697

    申请日：2008-07-25

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI

    IPC: G10L19/08 ,  G10L19/10 ,  G10L19/107 ,  H03M7/30

    Abstract: An audio encoding device which can improve encoding performance while performing division search on an algebraic codebook in an audio encoding. In a distortion minimizing unit (112) of a CELP encoding device: a maximum correlation value calculation unit (221) calculates a correlation value by using each pulse and a target signal in each candidate position for four pulses constituting the fixed codebook so as to acquire a maximum value of the correlation value for each pulse and calculates a maximum correlation value by using the maximum value of the correlation value; a sorting unit (222) divides the four pulses into two subsets each having two pulses; and a search unit (224) performs a division search on the fixed codebook and acquires a code indicating the positions and polarities of the four pulses where the encoding distortion is minimum.

    SPEECH CODER AND SPEECH DECODER
    49.
    发明专利
    SPEECH CODER AND SPEECH DECODER 未知

    公开(公告)号：CA2684379A1

    公开(公告)日：1999-04-29

    申请号：CA2684379

    申请日：1998-10-22

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI ,  YASUNAGA KAZUTOSHI

    IPC: G10L19/00 ,  G10L19/10 ,  G10L19/107 ,  G10L19/12

    Abstract: A vector quantizer and corresponding method for coding a linear prediction coefficients vector by muIti-stage vector quantization, the apparatus comprising: a first codebook that stores a plurality of first code vectors; a second codebook that stores a plurality of second code vectors; a storing section that stores a plurality of scalars; a first quantizing section that extracts a first code vector stored in the first codebook and performs first stage quantization for quantizing a target vector using the first code vector; a second quantizing section that extracts a second code vector stored in the second codebook, calculates a third code vector by multiplying the second code vector and one of the scalars stored in the storing section, performs distance calcutation using the target vector, the first code vector and the third code vector, and performs second stage quantization for quantizing the target vector using a result of the distance calculation, wherein each scalar stored in the storing section is associated with at least one of the first code vectors stored in the first codebook.

    50.
    发明专利
    未知

    公开(公告)号：BRPI0814129A2

    公开(公告)日：2015-02-03

    申请号：BRPI0814129

    申请日：2008-07-25

    Applicant: PANASONIC CORP

    Inventor： MORII TOSHIYUKI

    IPC: G10L19/08 ,  G10L19/10 ,  G10L19/107 ,  H03M7/30

    Abstract: An audio encoding device which can improve encoding performance while performing division search on an algebraic codebook in an audio encoding. In a distortion minimizing unit (112) of a CELP encoding device: a maximum correlation value calculation unit (221) calculates a correlation value by using each pulse and a target signal in each candidate position for four pulses constituting the fixed codebook so as to acquire a maximum value of the correlation value for each pulse and calculates a maximum correlation value by using the maximum value of the correlation value; a sorting unit (222) divides the four pulses into two subsets each having two pulses; and a search unit (224) performs a division search on the fixed codebook and acquires a code indicating the positions and polarities of the four pulses where the encoding distortion is minimum.

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