公开(公告)号：SG170078A1

公开(公告)日：2011-04-29

申请号：SG2011016110

申请日：2007-12-12

Applicant: PANASONIC CORP

Inventor： YAMANASHI TOMOFUMI ,  OSHIKIRI MASAHIRO

IPC: G10L19/02 ,  G10L19/038 ,  G10L19/08 ,  G10L19/083 ,  G10L19/24

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：AT480851T

公开(公告)日：2010-09-15

申请号：AT05799294

申请日：2005-10-26

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/02 ,  G10L11/00 ,  G10L19/06 ,  G10L19/08 ,  G10L19/09 ,  G10L19/12 ,  G10L19/24 ,  G10L25/90

Abstract: A scalable encoding apparatus capable of reducing the bit rates of encoded parameters and also capable of efficiently encoding even audio signals in which a plurality of harmonic structures are coexistent. In the apparatus, an MDCT analyzing part (111) MDCT analyzes an audio signal (S15) for converting/encoding processes. A pitch frequency converting part (112) determines the inverse of a pitch period to calculate a pitch frequency. A selecting part (113) selects spectra located at frequencies that are integral multiples of the pitch frequency. A second layer encoding part (106) encodes the selected spectra.

公开(公告)号：AT471557T

公开(公告)日：2010-07-15

申请号：AT04793277

申请日：2004-10-25

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L21/02 ,  G01L19/02 ,  G10L19/02 ,  G10L25/90

Abstract: A spectrum coding apparatus capable of performing coding at a low bit rate and with high quality is disclosed. This apparatus is provided with a section that performs the frequency transformation of a first signal and calculates a first spectrum, a section that converts the frequency of a second signal and calculates a second spectrum, a section that estimates the shape of the second spectrum in a band of FL‰¦k

公开(公告)号：DE602005016130D1

公开(公告)日：2009-10-01

申请号：DE602005016130

申请日：2005-09-28

Applicant: PANASONIC CORP

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

IPC: G10L19/02 ,  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：CA2679192C

公开(公告)日：2016-01-19

申请号：CA2679192

申请日：2008-02-29

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO ,  YAMANASHI TOMOFUMI ,  MORII TOSHIYUKI

IPC: G10L19/24 ,  G10L19/005 ,  G10L19/02 ,  H04W88/00

Abstract: Disclosed is an encoding device which can accurately specify a band having a large error among all the bands by using a small calculation amount. The device includes: a first position identification unit (201) which uses a first layer error conversion coefficient indicating an error of decoding signal for an input signal so as to search for a band having a large error in a relatively wide bandwidth in all the bands of the input signal and generates first position information indicating the identified band; a second position identification unit (202) which searches for a target frequency band having a large error in a relatively narrow bandwidth in the band identified by the first position identification unit (201) and generates second position information indicating the identified target frequency band; and an encoding unit (203) which encodes a first layer decoding error conversion coefficient contained in the target frequency band. The first position information, the second position information, and the encoding unit are transmitted to a communication partner.

公开(公告)号：BRPI0917953A2

公开(公告)日：2015-11-10

申请号：BRPI0917953

申请日：2009-08-07

Applicant: PANASONIC CORP

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

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

公开(公告)号：BRPI0808428A2

公开(公告)日：2014-07-22

申请号：BRPI0808428

申请日：2008-02-29

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO ,  MORII TOSHIYUKI ,  YAMANASHI TOMOFUMI

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.

公开(公告)号：BRPI0808202A2

公开(公告)日：2014-07-01

申请号：BRPI0808202

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

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.

公开(公告)号：CA2832032A1

公开(公告)日：2012-10-26

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 order to introduce a device and a method for the execution of Huffman coding for the coding and decoding of an audio signal, in the present invention, the design of a Huffman table can be carried out offline through the use of an extensive input-sequence database. The range for a quantization index (or a differentiation index) for Huffman coding is identified. All the input signals having the same range are gathered, for each of the range values, and the probability distribution for each value in the quantization index (or the differentiation index) within the range is calculated. A single Huffman table is designed for each range value, according to probability.

公开(公告)号：AT537536T

公开(公告)日：2011-12-15

申请号：AT05799362

申请日：2005-10-25

Applicant: PANASONIC CORP

Inventor： OSHIKIRI MASAHIRO

IPC: G10L19/02 ,  G10L19/022 ,  H03M7/30

Abstract: A sound encoding device enabling the amount of delay to be kept small and the distortion between frames to be mitigated. In the sound encoding device, a window multiplication part (211) of a long analysis section (21) multiplies a long analysis frame signal of analysis length M1 by an analysis window, the resultant signal multiplied by the analysis window is outputted to an MDCT section (212), and the MDCT section (212) performs MDCT of the input signal to obtain the transform coefficients of the long analysis frame and outputs it to a transform coefficient encoding section (30). The window multiplication part (221) of a short analysis section (22) multiplies a short analysis frame signal of analysis length M2 (M2