公开(公告)号：EP2128858A4

公开(公告)日：2012-03-14

申请号：EP08720311

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

CPC classification number: G10L19/038 ,  G10L19/10 ,  G10L25/18

Abstract: Provided is an encoding device which can obtain a sound quality preferable for auditory sense even if the number of information bits is small. The encoding device includes a shape quantization unit (111) having: a section search unit (121) which searches for a pulse for each of bands into which a predetermined search section is divided; and a whole search unit (122) which performs search for a pulse over the entire search section. The shape of an input spectrum is quantized by a small number of pulse positions and polarities. A gain quantization unit (112) calculates a gain of the pulse searched by the shape quantization unit (111) and quantizes the gain for each of the bands.

Abstract translation: 提供一种编码装置，即使信息比特数较少，也可以获得听觉优先的音质。 编码装置包括形状量化单元（111），具有：区间搜索单元，其搜索预定搜索区被分割成的每个频带的脉冲; 以及整个搜索单元（122），其执行搜索整个搜索部分的脉冲。 输入频谱的形状由少量的脉冲位置和极性量化。 增益量化单元（112）计算由形状量化单元（111）搜索的脉冲的增益，并对每个频带的增益进行量化。

公开(公告)号：EP2120234A4

公开(公告)日：2011-08-03

申请号：EP08710503

申请日：2008-02-29

Applicant: PANASONIC CORP

Inventor： MORII TOSHIYUKI ,  OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

IPC: G10L19/10 ,  G10L19/02 ,  G10L19/032 ,  G10L19/08

CPC classification number: G10L19/032 ,  G10L19/0212 ,  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 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.

Abstract translation: 提供了一种与传统技术相比可以减少编码失真并且可以获得用于听觉的优选声音质量的编码装置。 在编码装置中，形状量化单元（111）以少量的脉冲位置和极性量化输入频谱的形状。 形状量化单元（111）将脉冲位置的脉冲幅度宽度设定为不大于之前已经搜索过的脉冲幅度宽度的值。 增益量化单元（112）针对每个频带计算由形状量化单元（111）搜索的脉冲的增益。

公开(公告)号：EP2214163A4

公开(公告)日：2011-10-05

申请号：EP08843869

申请日：2008-11-04

Applicant: PANASONIC CORP

Inventor： CHONG KOK SENG ,  YOSHIDA KOJI ,  OSHIKIRI MASAHIRO

IPC: G10L19/00 ,  G10L19/008 ,  G10L19/02 ,  G10L19/08 ,  G10L19/14 ,  G10L19/24

CPC classification number: G10L19/008 ,  G10L19/0208 ,  G10L19/0212 ,  G10L19/08 ,  G10L19/24

Abstract: Provided is an encoding device which improves the sound quality of a stereo signal while maintaining a low bit rate. The encoding device includes: an LP inverse filter (121) which LP-inverse-filterS a left signal L(n) by using an inverse quantization linear prediction coefficient AdM(z) of a monaural signal; a T/F conversion unit (122) which converts the left sound source signal Le(n) from a temporal region to a frequency region; an inverse quantizer (123) which inverse-quantizes encoded information Mqe; spectrum division units (124, 125) which divide a high-frequency component of the sound source signal Mde(f) and the left signal Le(f) into a plurality of bands; and scale factor calculation units (126, 127) which calculate scale factors ai and ssi by using a monaural sound source signal Mdeh,i(f), a left sound source signal Leh,i(f), Mdeh,i(f), and right sound source signal Reh,i(f) of each divided band.

公开(公告)号：EP2116998A4

公开(公告)日：2010-12-22

申请号：EP08720313

申请日：2008-02-29

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/24 ,  G10L19/26

CPC classification number: G10L19/24 ,  G10L19/26

Abstract: Provided is a decoding device which suppresses generation of an abnormal sound caused by a layer switch. The decoding device includes: a first layer decoding unit (202) which performs a decoding process on first layer encoded data so as to generate a first layer decoding signal; a second layer decoding unit (203) which performs a decoding process on second layer encoded data so as to generate a first layer decoding error signal; an adder (204) which adds the first layer decoding signal and the first layer decoding error signal so as to generate a second layer decoding signal; a switching unit (205) which performs switching between the first layer signal and the second layer decoding signal for output according to layer information; and a post-filter (206) which selects a control parameter corresponding to the respective layer information and performs a control parameter smoothing process so as to generate a smoothed control parameter and performs a filter process on the decoding signal from the switching unit (205) by using the generated smoothed control parameter.

公开(公告)号：EP2012305A4

公开(公告)日：2010-04-14

申请号：EP07742526

申请日：2007-04-26

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

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

CPC classification number: G10L19/24 ,  G10L19/0204 ,  G10L19/09

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：EP2631905A4

公开(公告)日：2014-04-30

申请号：EP11833996

申请日：2011-09-14

Applicant: PANASONIC CORP

Inventor： LIU ZONGXIAN ,  CHONG KOK SENG ,  OSHIKIRI MASAHIRO

IPC: G10L19/24 ,  G10L19/02 ,  G10L19/08 ,  G10L21/02

CPC classification number: G10L19/06 ,  G10L19/0212 ,  G10L19/24

公开(公告)号：EP2581904A4

公开(公告)日：2013-10-09

申请号：EP11792106

申请日：2011-05-27

Applicant: PANASONIC CORP

Inventor： KAWASHIMA TAKUYA ,  OSHIKIRI MASAHIRO

IPC: G10L19/22 ,  G10L19/02 ,  G10L19/12 ,  G10L19/24 ,  H03M7/30

CPC classification number: G10L21/034 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/12 ,  G10L19/22 ,  G10L19/24

Abstract: Disclosed is a decoder capable of improving the sound quality of a decoded sound signal in an encoding method which combines speech encoding and music encoding in a hierarchical structure. A transform-encoding decoding unit (202) decodes transform-encoded data to generate a spectrum of a decoded transform-encoded signal. A band decision unit (203) uses the spectrum of the decoded transform-encoded signal to decide whether each of a plurality of bands in which frequency components of an input signal are divided constitute a first band in which a transform encoded pulse is not established or a second band in which said pulse is established. A CELP component suppression unit (207) suppresses the spectrum of a CELP decoded signal, which is the frequency component of a decoded signal of CELP encoded data, to the extent that suppression in the first band is weaker than suppression in the second band.

公开(公告)号：EP2402941A4

公开(公告)日：2013-06-12

申请号：EP10746003

申请日：2010-02-25

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/008 ,  G10L19/00 ,  G10L19/02 ,  H04S1/00

CPC classification number: G10L19/008 ,  H04S1/007 ,  H04S2420/03 ,  H04S2420/07

公开(公告)号：EP1953737A4

公开(公告)日：2011-11-09

申请号：EP06821860

申请日：2006-10-13

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI

IPC: G10L19/02

CPC classification number: G10L19/0208 ,  G10L19/038 ,  G10L19/24

Abstract: A transform coder leading to reduction of degradation of perceptual sound quality even if an adequate number of bits is not assigned. Candidates of a correction scale factor stored in a correction scale factor codebook (123) are outputted one by one, and an error signal is generated by subjecting the candidate and scale factors outputted from scale factor computing sections (121, 122) to a predetermined operation. A judging section (126) determines a weight vector given to a weighted error computing section (127) depending on the sign of the error signal. The weighted error computing section (127) computes the square of the error signal, multiplies the square of the error signal by the weight vector given from the judging section (126), and computes a weighted squared error E. A search section (128) determines the candidates of the correction scale factor which minimizes the weighted squared error E by a closed loop processing.

公开(公告)号：EP2101322A4

公开(公告)日：2011-08-31

申请号：EP07850645

申请日：2007-12-14

Applicant: PANASONIC CORP

Inventor： YAMANASHI TOMOFUMI ,  OSHIKIRI MASAHIRO

IPC: G10L19/24 ,  G10L21/038

CPC classification number: G10L19/24 ,  G10L21/038

Abstract: Disclosed is a decoding device and others capable of flexibly calculating high-band spectrum data with a high accuracy in accordance with an encoding band selected by an upper-node layer of the encoding side. In this device: a first layer decoding unit (202) decodes first layer encoded information to generate a first layer decoded signal; a second layer decoding unit (204) decodes second layer encoded information to generate a second layer decoded signal; a spectrum decoding unit (205) performs a band extension process by using the second layer decoded signal and the first layer decoded signal up-sampled in an up-sampling unit (203) so as to generate a all-band decoded signal; and a switch (206) outputs the first layer decoded signal or the all-band decoded signal according to the control information generated in a control unit (201).

Abstract translation: 公开了一种能够根据由编码侧的上层节点选择的编码频带，以高精度灵活地计算高频谱数据的解码装置等。 在该装置中：第一层解码单元（202）解码第一层编码信息以产生第一层解码信号; 第二层解码单元（204）对第二层编码信息进行解码以产生第二层解码信号; 频谱解码单元（205）通过使用第二层解码信号和在上采样单元（203）中被上采样的第一层解码信号来执行频带扩展处理，以便产生全频带解码信号; 开关（206）根据在控制单元（201）中生成的控制信息输出第一层解码信号或全频带解码信号。