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公开(公告)号:MX2010009307A
公开(公告)日:2010-09-24
申请号:MX2010009307
申请日:2009-03-13
Applicant: PANASONIC CORP
Inventor: OSHIKIRI MASAHIRO , YAMANASHI TOMOFUMI
IPC: G10L19/24 , G10L21/038
Abstract: Es posible mejorar la calidad de una señal de decodificación en una extensión de banda para estimar una banda alta de una banda baja de una señal de decodificación. Una primera unidad de codificación de capa (202) codifica una porción de banda más baja por debajo de una frecuencia predeterminada de una señal de entrada para así generar la primera información codificada de capa. Una primera unidad de decodificación de capa (203) decodifica la primera información codificada de capa para así generar una primera señal de desmodulada de capa. Una segunda unidad de codificación de capa (206) divide una porción de banda alta más alta que una frecuencia predeterminada de una señal de entrada en una pluralidad de subbandas y estima cada una de la subbandas a partir de la señal de entrada o la primera señal decodificada de capa utilizando el resultado de la estimación de la subbanda adyacente al lado de la banda más baja para así generar la segunda información codificada que incluye los resultados de la estimación de las subbandas.
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公开(公告)号:DE602004027750D1
公开(公告)日:2010-07-29
申请号:DE602004027750
申请日:2004-10-25
Applicant: PANASONIC CORP
Inventor: OSHIKIRI MASAHIRO
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公开(公告)号:AU2007332508A2
公开(公告)日:2010-02-25
申请号:AU2007332508
申请日:2007-12-12
Applicant: PANASONIC CORP
Inventor: OSHIKIRI MASAHIRO , YAMANASHI TOMOFUMI
IPC: G10L19/02 , G10L19/038 , G10L19/08 , G10L19/083 , G10L19/24 , H03M7/30
Abstract: Disclosed are an encoding device and others capable of reducing the encoded information amount, the audio signal encoding error, and the decoded signal audio quality degradation. The device includes: a frequency region conversion unit (101) which converts an inputted audio signal into a frequency region; a band selection unit (102) which selects a quantization object band from a plurality of sub bands obtained by dividing the frequency region; and a shape quantization unit (103) which quantizes the shape of the frequency region parameter of the quantization object band. When a prediction encoding presence/absence judgment unit (104) judges that the number of common sub bands between the quantization object band and the quantization object band selected in the past is not smaller than a predetermined value, a gain quantization unit (105) performs prediction encoding on the gain of the frequency region parameter of the quantization object band. When the number of the common sub bands is smaller than the predetermined value, the gain quantization unit (105) directly quantizes the gain of the frequency region parameter of the quantization object band.
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公开(公告)号:MX2009009229A
公开(公告)日:2009-09-08
申请号:MX2009009229
申请日:2008-02-29
Applicant: PANASONIC CORP
Inventor: MORII TOSHIYUKI , OSHIKIRI MASAHIRO , YAMANASHI TOMOFUMI
IPC: G10L19/08 , G10L19/038 , G10L19/10 , G10L25/18
Abstract: Se proporciona un dispositivo de codificación que puede obtener una calidad de sonido preferible para sentido auditivo incluso si el número de bits de información es pequeño. El dispositivo de codificación incluye una unidad de cuantificación de forma (111) que tiene: una unidad de búsqueda de sección (121) la cual busca un pulso para cada una de las bandas en las cuales está dividida una sección de búsqueda predeterminada, y una unidad de búsqueda completa (122) que lleva a cabo búsqueda de un pulso sobre la sección de búsqueda completa. La forma de un espectro de entrada es cuantificada por un número pequeño de posiciones de pulso y polaridades. Una unidad de cuantificación de ganancia (112) calcula una ganancia del pulso buscado por la unidad de cuantificación de forma (111) y cuantifica la ganancia para cada una de las bandas.
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公开(公告)号:DE602004021266D1
公开(公告)日:2009-07-09
申请号:DE602004021266
申请日:2004-09-15
Applicant: PANASONIC CORP
Inventor: OSHIKIRI MASAHIRO
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公开(公告)号:AU2008233888A1
公开(公告)日:2008-10-09
申请号:AU2008233888
申请日:2008-02-29
Applicant: PANASONIC CORP
Inventor: MORII TOSHIYUKI , YAMANASHI TOMOFUMI , OSHIKIRI MASAHIRO
IPC: G10L19/02 , G10L19/083 , G10L19/16
Abstract: Provided is a voice encoding device which can accurately encode a spectrum shape of a signal having a strong tonality such as a vowel. The device includes: a sub-band constituting unit (151) which divides a first layer error conversion coefficient to be encoded into M sub-bands so as to generate M sub-band conversion coefficients; a shape vector encoding unit (152) which performs encoding on each of the M sub-band conversion coefficient so as to obtain M shape encoded information and calculates a target gain of each of the M sub-band conversion coefficients; a gain vector forming unit (153) which forms one gain vector by using M target gains; a gain vector encoding unit (154) which encodes the gain vector so as to obtain gain encoded information; and a multiplexing section unit (155) which multiplexes the shape encoded information with the gain encoded information.
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公开(公告)号:AU2008222241A1
公开(公告)日:2008-09-12
申请号:AU2008222241
申请日:2008-02-29
Applicant: PANASONIC CORP
Inventor: YAMANASHI TOMOFUMI , MORII TOSHIYUKI , OSHIKIRI MASAHIRO
IPC: G10L19/10 , G10L19/02 , G10L19/032 , G10L19/08
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 a pulse 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.
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公开(公告)号:EP2701144A4
公开(公告)日:2014-03-26
申请号:EP12774449
申请日:2012-03-12
Applicant: PANASONIC CORP
Inventor: LIU ZONGXIAN , CHONG KOK SENG , OSHIKIRI MASAHIRO
CPC classification number: G10L19/032 , G10L19/0017 , G10L19/0208 , G10L19/0212
Abstract: In this invention, the design of the Huffman table can be done offline with a large input sequence database. The range of the quantization indices (or differential indices) for Huffman coding is identified. For each value of range, all the input signal which have the same range will be gathered and the probability distribution of each value of the quantization indices (or differential indices) within the range is calculated. For each value of range, one Huffman table is designed according to the probability. And in order to improve the bits efficiency of the Huffman coding, apparatus and methods to reduce the range of the quantization indices (or differential indices) are also introduced.
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79.
公开(公告)号:EP2128857A4
公开(公告)日:2013-08-14
申请号:EP08710511
申请日:2008-02-29
Applicant: PANASONIC CORP
Inventor: OSHIKIRI MASAHIRO , MORII TOSHIYUKI , YAMANASHI TOMOFUMI
IPC: G10L19/02 , G10L19/038 , G10L19/083 , G10L19/16 , G10L19/24
CPC classification number: G10L19/00 , G10L19/005 , G10L19/02 , G10L19/0208 , G10L19/038 , G10L19/083 , G10L19/24 , G10L25/18
Abstract: Provided is a voice encoding device which can accurately encode a spectrum shape of a signal having a strong tonality such as a vowel. The device includes: a sub-band constituting unit (151) which divides a first layer error conversion coefficient to be encoded into M sub-bands so as to generate M sub-band conversion coefficients; a shape vector encoding unit (152) which performs encoding on each of the M sub-band conversion coefficient so as to obtain M shape encoded information and calculates a target gain of each of the M sub-band conversion coefficients; a gain vector forming unit (153) which forms one gain vector by using M target gains; a gain vector encoding unit (154) which encodes the gain vector so as to obtain gain encoded information; and a multiplexing section unit (155) which multiplexes the shape encoded information with the gain encoded information.
Abstract translation: 提供一种能够准确地对诸如元音之类的具有强调性的信号的频谱形状进行编码的语音编码设备。 该装置包括:子带构成单元(151),将要编码的第一层误差转换系数划分为M个子带以生成M个子带转换系数; 形状矢量编码单元(152),其对M个子带转换系数中的每一个进行编码以获得M形编码信息,并且计算M个子带转换系数中的每一个的目标增益; 增益矢量形成单元(153),其使用M个目标增益形成一个增益矢量; 增益矢量编码单元(154),对增益矢量进行编码以获得增益编码信息; 以及多路复用部分单元(155),其将形状编码信息与增益编码信息进行多路复用。
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公开(公告)号:EP2096631A4
公开(公告)日:2012-07-25
申请号:EP07859788
申请日:2007-12-12
Applicant: PANASONIC CORP
Inventor: MORII TOSHIYUKI , OSHIKIRI MASAHIRO
CPC classification number: G10L19/26 , H03G3/3005
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