公开(公告)号：US20100256980A1

公开(公告)日：2010-10-07

申请号：US12819690

申请日：2010-06-21

申请人： Masahiro OSHIKIRI ,  Hiroyuki EHARA ,  Koji YOSHIDA

发明人： Masahiro OSHIKIRI ,  Hiroyuki EHARA ,  Koji YOSHIDA

IPC分类号： G10L21/06

CPC分类号： G10L21/038

摘要： An encoder, decoder, encoding method, and decoding method enabling acquisition of high-quality decoded signal in scalable encoding of an original signal in first and second layers even if the second or upper layer section performs low bit-rate encoding. In the encoder, a spectrum residue shape codebook stores candidates of spectrum residue shape vectors, a spectrum residue gain codebook stores candidates of spectrum residue gains, and a spectrum residue shape vector and a spectrum residue gain are sequentially outputted from the candidates according to the instruction from a search section. A multiplier multiplies a candidate of the spectrum residue shape vector by a candidate of the spectrum residue gain and outputs the result to a filtering section. The filtering section performs filtering by using a pitch filter internal state set by a filter state setting section, a lag T outputted by a lag setting section, and a spectrum residue shape vector which has undergone gain adjustment.

摘要翻译： 即使第二或上层部分执行低比特率编码，编码器，解码器，编码方法和解码方法能够在第一和第二层中的原始信号的可分级编码中获取高质量解码信号。 在编码器中，频谱残差形状码本存储频谱残差形状向量的候选，频谱残差增益码本存储频谱残差增益的候选，频谱残差形状矢量和频谱残差增益从根据指令的候选顺序输出 从搜索部分。 乘法器将频谱残差形状矢量的候选乘以频谱残差增益的候选，并将结果输出到滤波部分。 滤波部分通过使用由滤波器状态设置部分设置的音调滤波器内部状态，由滞后设置部分输出的延迟T和经过增益调整的频谱残差形状矢量进行滤波。

公开(公告)号：US20110264457A1

公开(公告)日：2011-10-27

申请号：US13158944

申请日：2011-06-13

申请人： Masahiro OSHIKIRI ,  Hiroyuki EHARA ,  Koji YOSHIDA

发明人： Masahiro OSHIKIRI ,  Hiroyuki EHARA ,  Koji YOSHIDA

IPC分类号： G10L19/00

CPC分类号： G10L21/038

摘要： An encoding apparatus and method for generating low-frequency-band encoding information and high-frequency-band encoding information from an original signal. The encoding apparatus includes a first spectrum calculator that calculates a first spectrum of a low frequency band from a decoded signal of the low-frequency-band encoding information, a second spectrum calculator that calculates a second spectrum from the original signal, an estimator that divides a high frequency band of the second spectrum into a plurality of bands and estimates the second spectrum included in each band, using the first spectrum, and a first error component encoder that encodes a first error component between the high frequency band of the second spectrum and an estimated spectrum. A corresponding decoding apparatus and method provides decoding.

摘要翻译： 一种用于从原始信号产生低频带编码信息和高频带编码信息的编码装置和方法。 编码装置包括：第一频谱计算器，根据低频带编码信息的解码信号计算低频带的第一频谱;第二频谱计算器，从原始信号计算第二频谱;估计器，其将 将第二频谱的高频带转换成多个频带，并使用第一频谱估计包括在每个频带中的第二频谱，以及第一误差分量编码器，其对第二频谱的高频带和 估计频谱。 相应的解码装置和方法提供解码。

公开(公告)号：US20100138219A1

公开(公告)日：2010-06-03

申请号：US12700583

申请日：2010-02-04

申请人： Masahiro OSHIKIRI

发明人： Masahiro OSHIKIRI

IPC分类号： G10L19/00

CPC分类号： H04B1/667 ,  G10L19/083

摘要： A coding apparatus capable of coding a spectrum at a low bit rate and with high quality without producing any disturbance in a harmonic structure of the spectrum. In this apparatus, internal state setting section sets an internal state of a filtering section using a first spectrum S1(k). A pitch coefficient setting section outputs a pitch coefficient T by gradually changing it. The filtering section calculates an estimated value S′2(k) of a second spectrum S2(k) based on a pitch coefficient T. A search section calculates the degree of similarity between S2(k) and S′2(k). At this time, pitch coefficient T′ corresponding to the maximum calculated degree of similarity is given to a filter coefficient calculation section. The filter coefficient calculation section determines a filter coefficient βi using this pitch coefficient T′.

摘要翻译： 一种能够以低比特率和高质量对频谱进行编码，而不会在频谱的谐波结构中产生任何干扰的编码装置。 在该装置中，内部状态设定部使用第一频谱S1（k）设定滤波部的内部状态。 俯仰系数设定部通过逐渐变化来输出俯仰系数T. 滤波部基于音调系数T计算第二频谱S2（k）的估计值S'2（k）。搜索部分计算S2（k）和S'2（k）之间的相似度。 此时，将与最大计算出的相似度对应的音调系数T'赋予滤波器系数计算部。 滤波器系数计算部使用该音调系数T'来确定滤波器系数bgr i。

公开(公告)号：US20120221342A1

公开(公告)日：2012-08-30

申请号：US13463653

申请日：2012-05-03

申请人： Masahiro OSHIKIRI

发明人： Masahiro OSHIKIRI

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/24

摘要： A coding apparatus reduces a circuit scale and the amount of coding processing calculation. A frequency domain conversion section performs a frequency analysis of the signal sampled at a sampling rate Fx with an analysis length of 2·Na and calculates first spectrum S1(k)(0≦k

摘要翻译： 编码装置减少电路规模和编码处理计算量。 频域转换部对分析长度为2·Na的采样率Fx进行采样的信号的频率分析，计算出第一频谱S1（k）（0＆nlE; k

公开(公告)号：US20100217609A1

公开(公告)日：2010-08-26

申请号：US12775216

申请日：2010-05-06

申请人： Masahiro OSHIKIRI

发明人： Masahiro OSHIKIRI

IPC分类号： G10L19/00

CPC分类号： G10L19/24

摘要： A down-sampler 101 down-samples the sampling rate of an input signal from sampling rate FH to sampling rate FL. A base layer coder 102 encodes the sampling rate FL acoustic signal. A local decoder 103 decodes coding information output from base layer coder 102. An up-sampler 104 raises the sampling rate of the decoded signal to FH. A subtractor 106 subtracts the decoded signal from the sampling rate FH acoustic signal. An enhancement layer coder 107 encodes the signal output from subtractor 106 using a decoding result parameter output from local decoder 103.

摘要翻译： 下采样器101将输入信号的采样率从采样率FH下采样到采样率FL。 基层编码器102对采样率FL声信号进行编码。 本地解码器103解码从基本层编码器102输出的编码信息。上采样器104将解码信号的采样率提高到FH。 减法器106从采样率FH声信号中减去解码信号。 增强层编码器107使用从本地解码器103输出的解码结果参数对从减法器106输出的信号进行编码。

公开(公告)号：US20120136653A1

公开(公告)日：2012-05-31

申请号：US13367840

申请日：2012-02-07

申请人： Masahiro OSHIKIRI ,  Tomofumi YAMANASHI

发明人： Masahiro OSHIKIRI ,  Tomofumi YAMANASHI

IPC分类号： G10L19/02

CPC分类号： G10L19/0208 ,  G10L19/038 ,  G10L19/24

摘要： A transform coding apparatus includes an input scale factor calculating section that calculates an input scale factor having a predetermined number of scale factors associated with an input spectrum as an element, and a codebook that stores a plurality of scale factor candidates having a predetermined number of elements and outputs one scale factor candidate. The transform coding apparatus also includes an error calculating section that calculates an error on a per element basis, a weighted error calculating section that determines a weight on a per element basis and calculates a sum of products of the error and the weight to calculate a weighted error, and a searching section that searches for a scale factor candidate that minimizes the weighted error in the codebook.

摘要翻译： 变换编码装置包括：输入比例因子计算部分，其计算具有与输入频谱相关联的预定数量的比例因子作为元素的输入比例因子;以及码本，其存储具有预定数量的元素的多个比例因子候选 并输出一个比例因子候选。 变换编码装置还包括：以每个元素为基础计算误差的误差计算部，加权误差计算部，其基于每个元素确定权重，并计算误差和权重的乘积之和，以计算加权的 错误和搜索部分，其搜索使码本中的加权误差最小化的比例因子候选。

公开(公告)号：US20100161321A1

公开(公告)日：2010-06-24

申请号：US12708290

申请日：2010-02-18

申请人： Masahiro OSHIKIRI

发明人： Masahiro OSHIKIRI

IPC分类号： G10L19/02 ,  G10L21/04

CPC分类号： G10L21/038 ,  G10L19/24

摘要： A coding apparatus reduces a circuit scale and the amount of coding processing calculation. A frequency domain conversion section performs a frequency analysis of the signal sampled at a sampling rate Fx with an analysis length of 2·Na and calculates first spectrum S1(k)(0≦k

摘要翻译： 编码装置减少电路规模和编码处理计算量。 频域转换部对分析长度为2·Na的采样率Fx进行采样的信号的频率分析，计算出第一频谱S1（k）（0＆nlE; k