公开(公告)号：DE602007013026D1

公开(公告)日：2011-04-21

申请号：DE602007013026

申请日：2007-04-26

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/02 ,  G10L19/08 ,  G10L19/09 ,  G10L19/24 ,  G10L25/90

公开(公告)号：MX2011001253A

公开(公告)日：2011-03-21

申请号：MX2011001253

申请日：2009-08-07

Applicant: PANASONIC CORP

Inventor： EHARA HIROYUKI ,  MORII TOSHIYUKI ,  OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

IPC: G10L19/02 ,  G10L11/00 ,  G10L19/032 ,  G10L19/24 ,  G10L21/02

Abstract: Se describe un dispositivo de filtrado espectral con una estructura con la cual se lleva a cabo filtrado después de que se ha llevado a cabo una conversión no lineal para un espectro calculado a partir de una señal de audio, y con el cual la cantidad de cálculo de procesamiento se reduce significativamente mientras se conserva excelente calidad de audio. Con este dispositivo de filtrado espectral, una unidad de división de sub-bandas (102) divide un espectro de entrada en varias sub-bandas; una unidad de cálculo de valores representativos (103) calcula un valor representativo para cada sub-banda usando una media aritmética y una media geométrica; con respecto a cada valor representativo, una unidad de conversión no lineal (104) lleva a cabo una conversión no lineal cuya característica se enfatiza más al incrementarse el valor; y una unidad de filtrado (105) que filtra el valor representativo que ha sido sometido a la conversión no lineal para cada sub-banda, en el dominio de frecuencias.

公开(公告)号：AT501505T

公开(公告)日：2011-03-15

申请号：AT07742526

申请日：2007-04-26

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/14 ,  G10L19/02 ,  G10L19/08 ,  G10L19/09 ,  G10L19/24 ,  G10L25/90

Abstract: Provided is an audio encoding device capable of preventing audio quality degradation of a decoded signal. In the audio encoding device, a noise analysis unit (118) analyzes a noise characteristic of a higher range of an input spectrum. A filter coefficient decision unit (119) decides a filter coefficient in accordance with the noise characteristic information from the noise characteristic analysis unit (118). A filtering unit (113) includes a multi-tap pitch filter for filtering a first-layer decoded spectrum according to a filter state set by a filter state setting unit (112), a pitch coefficient outputted from a pitch coefficient setting unit (115), and a filter coefficient outputted from the filter coefficient decision unit (119), and calculates an estimated spectrum of the input spectrum. An optimal pitch coefficient can be decided by the process of a closed loop formed by the filter unit (113), a search unit (114), and the pitch coefficient setting unit (115).

公开(公告)号：AT440361T

公开(公告)日：2009-09-15

申请号：AT05787917

申请日：2005-09-28

Applicant: PANASONIC CORP

Inventor： GOTO MICHIYO ,  EHARA HIROYUKI ,  YOSHIDA KOJI ,  OSHIKIRI MASAHIRO

IPC: G10L19/00 ,  G10L19/12 ,  G10L19/14

Abstract: A scalable encoding device for realizing scalable encoding by CELP encoding of a stereo sound signal and improving the encoding efficiency. In this device, an adder and a multiplier obtain an average of a first channel signal CH1 and a second channel signal CH2 as a monaural signal M. A CELP encoder for a monaural signal subjects the monaural signal M to CELP encoding, outputs the obtained encoded parameter to outside, and outputs a synthesized monaural signal M′ synthesized by using the encoded parameter to a first channel signal encoder. By using the synthesized monaural signal M′ and the second channel signal CH2, the first channel signal encoder subjects the first channel signal CH1 to CELP encoding to minimize the sum of the encoding distortion of the first channel signal CH1 and the encoding distortion of the second channel signal CH2.

公开(公告)号：AU2007332508A1

公开(公告)日：2008-06-19

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.

公开(公告)号：CA2832032C

公开(公告)日：2019-09-24

申请号：CA2832032

申请日：2012-03-12

Applicant: PANASONIC CORP

Inventor： LIU ZONGXIAN ,  CHONG KOK SENG ,  OSHIKIRI MASAHIRO

IPC: G10L19/02

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.

公开(公告)号：BR112012032746A2

公开(公告)日：2016-11-08

申请号：BR112012032746

申请日：2011-06-07

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

IPC: G10L21/04 ,  G10L19/02 ,  G10L19/22 ,  G10L19/24

Abstract: dispositivo de descodificação, dispositivo de codificação, e métodos para os mesmos. a presente invenção refere-se a um dispositivo de descodificação que pode codificar/descodificar dados espectrais de modo eficiente em uma seção de passagem alta de um sinal de banda larga. no dispositivo descrito: uma unidade de extração de grupo de amostra (372) seleciona parcialmente componentes espectrais por meio de uma facilidade de importância de seleção até o ponto em que os componentes espectrais aproximem-se do componente espectral que tem o valor de amplitude máximo, no espectro de uma passagem alta avaliada por meio de primeiros parâmetros contidos na segunda informação codificada e as bandas mais próximas a cada espectro de uma pluralidade de sub-bandas calculada a partir do espectro de um segundo sinal descodificado; uma unidade de aplicação de ganho logarítmico (373) aplica segundos parãmetros aos componentes espectrais parcialmente selecionados; e uma unidade de processamento de interpolação374) aplica terceiros parãmetros que são ajustado de modo adaptável de acordo com o valor dos segundos parãmetros, para os componentes espectrais que não fora, parciamente selecionados.

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.

公开(公告)号：AT555470T

公开(公告)日：2012-05-15

申请号：AT05765807

申请日：2005-07-14

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/00 ,  G10L19/04

Abstract: Even when a combination of the stegonography technique and prediction encoding is applied to sound encoding, a sound encoder does not cause deterioration in quality of decoded signals. In the device, an encoding section (102) outputs an encoding code (I) to a bit embedding section (104). A function extension encoding section (103) generates an encoding code (J) for information required for extending functions of the sound encoder (100) and outputs it to the bit embedding section (104). The bit embedding section (104) embeds information on the encoding code (J) into a part of bits of the encoding code (I) and outputs the resultant encoding code (I'). A synchronization information generating section (106) generates synchronization information according to the encoding code (I') after the bit embedding and outputs the synchronization information to the encoding section (102). The encoding section (102) updates the internal state and the like on the basis of the synchronization information and encodes the next digital sound signal (X).

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