公开(公告)号：US6058359A

公开(公告)日：2000-05-02

申请号：US34590

申请日：1998-03-04

申请人： Roar Hagen ,  Erik Ekudden

发明人： Roar Hagen ,  Erik Ekudden

IPC分类号： G10L19/002 ,  G10L19/12 ,  G10L19/18 ,  G10L9/00

CPC分类号： G10L19/12 ,  G10L19/18 ,  G10L19/002

摘要： Adaptive speech coding includes receiving an original speech signal, performing on the original speech signal a current coding operation, and adapting the current coding operation in response to information used in the current coding operation. Adaptive speech decoding includes receiving coded information, performing a current decoding operation on the coded information, and adapting the current decoding operation in response to information used in the current decoding operation.

摘要翻译： 自适应语音编码包括接收原始语音信号，对原始语音信号执行当前编码操作，并根据当前编码操作中使用的信息调整当前编码操作。 自适应语音解码包括接收编码信息，对编码信息执行当前解码操作，以及响应当前解码操作中使用的信息调整当前解码操作。

公开(公告)号：US06192335B1

公开(公告)日：2001-02-20

申请号：US09144961

申请日：1998-09-01

申请人： Erik Ekudden ,  Roar Hagen

发明人： Erik Ekudden ,  Roar Hagen

IPC分类号： G10L1104

CPC分类号： G10L19/083 ,  G10L2019/0003 ,  G10L2025/935

摘要： In producing from an original speech signal a plurality of parameters from which an approximation of the original speech signal can be reconstructed, a coded signal of the original speech signal is generated. At least one of the parameters is determined using first and second differences between the original speech signal and the coded signal. The first difference is a difference between a waveform associated with the original speech signal and a waveform associated with the coded signal, and the second difference is a difference between an energy parameter derived from the original speech signal and a corresponding energy parameter associated with the coded signal.

摘要翻译： 在从原始语音信号生成可以重构原始语音信号的近似的多个参数时，生成原始语音信号的编码信号。 使用原始语音信号和编码信号之间的第一和第二差异来确定参数中的至少一个。 第一个区别是与原始语音信号相关联的波形与与编码信号相关联的波形之间的差异，第二个差异是从原始语音信号导出的能量参数与与编码信号相关联的相应能量参数之间的差异 信号。

公开(公告)号：US6138093A

公开(公告)日：2000-10-24

申请号：US32942

申请日：1998-03-02

申请人： Erik Ekudden ,  Roar Hagen ,  Bastiaan Kleijn

发明人： Erik Ekudden ,  Roar Hagen ,  Bastiaan Kleijn

IPC分类号： G10L19/26 ,  G10L21/0232 ,  G10L25/27 ,  H03M7/30 ,  H04B14/00 ,  G10L19/02

CPC分类号： G10L19/26 ,  G10L21/0232 ,  G10L25/27

摘要： A post-processing method for a speech decoder which outputs a decoded speech signal in the time domain provides high frequency resolution based on a frequency spectrum having non-harmonic and noise deficiencies. This is obtained by transforming the decoded time domain signal to a frequency domain signal by using a high frequency resolution transform (FFT). Then an analysis of the energy distribution of the frequency domain signal is made throughout its frequency area (4 kHz) to find the disturbing frequency components and to prioritize such frequency components which are situated in the higher part of the frequency spectrum. Next, the suppression degree for the disturbing frequency components is found based on prioritizing. Finally the steps of controlling a post-filtering of the transform in dependence of the finding, and inverse transforming the post-filtered transform in order to obtain a post-filtered decoded speech signal in the time domain are performed.

摘要翻译： 用于在时域中输出解码语音信号的语音解码器的后处理方法基于具有非谐波和噪声缺陷的频谱提供高频分辨率。 这是通过使用高频分辨率变换（FFT）将解码的时域信号变换为频域信号而获得的。 然后在其频率区域（4kHz）中对频域信号的能量分布进行分析，以找到干扰频率分量，并对位于频谱的较高部分中的这种频率分量进行优先排序。 接下来，基于优先级来找到干扰频率分量的抑制度。 最后，执行根据发现来控制变换的后置滤波的步骤，以及逆时变逆变换以便在时域中获得后滤波的解码语音信号。

公开(公告)号：US06564183B1

公开(公告)日：2003-05-13

申请号：US09469258

申请日：1999-12-22

申请人： Roar Hagen ,  Erik Ekudden

发明人： Roar Hagen ,  Erik Ekudden

IPC分类号： G10L1900

CPC分类号： G10L19/12 ,  G10L19/002 ,  G10L19/18 ,  G10L2019/0008

摘要： A speech encoding/decoding apparatus. A speech encoding apparatus has a coding portion for receiving input information related to an uncoded signal representative of an original speech signal, the coding portion including a fixed coding portion for receiving the input information and producing a first coded signal estimate, and an adaptive coding portion for receiving the input information and producing a second coded signal estimate. A controller is connected to the fixed coding portion and the adaptive coding portion for receiving information indicative of speech characteristics of the uncoded signal and generates a control signal; and a code modifier receives the first coded signal estimate from the fixed coding portion and the control signal from the controller and produces a modified signal estimate.

摘要翻译： 语音编码/解码装置。 语音编码装置具有编码部分，用于接收与代表原始语音信号的未编码信号有关的输入信息，编码部分包括用于接收输入信息并产生第一编码信号估计的固定编码部分，以及自适应编码部分 用于接收输入信息并产生第二编码信号估计。 控制器连接到固定编码部分和自适应编码部分，用于接收指示未编码信号的语音特性的信息，并产生控制信号; 代码修改器接收来自固定编码部分的第一编码信号估计和来自控制器的控制信号，并产生修改的信号估计。

公开(公告)号：US06301556B1

公开(公告)日：2001-10-09

申请号：US09470472

申请日：1999-12-22

申请人： Roar Hagen ,  Björn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

发明人： Roar Hagen ,  Björn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

IPC分类号： G10L1900

CPC分类号： G10L19/12 ,  G10L19/002 ,  G10L2019/0008

摘要： An apparatus and method for reducing sparseness in a coded speech signal. Sparse codebook values are generated from a codebook. An anti-sparseness operation is performed on the sparse codebook values to produce output codebook values having a greater density of non-zero values than the sparse codebook values. The output codebook values are processed by a speech processor to generate an encoded speech signal during an encoding operation or a decoded speech signal during a decoding operation.

摘要翻译： 一种用于减少编码语音信号中的稀疏性的装置和方法。 从码本生成稀疏码本值。 对稀疏码本值进行反稀疏操作以产生具有比稀疏码本值更大的非零值密度的输出码本值。 输出码本值由语音处理器处理，以在解码操作期间在编码操作期间产生编码语音信号或解码语音信号。

公开(公告)号：US6029125A

公开(公告)日：2000-02-22

申请号：US110989

申请日：1998-07-07

申请人： Roar Hagen ,  Bjorn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

发明人： Roar Hagen ,  Bjorn Stig Erik Johansson ,  Erik Ekudden ,  Willem Baastian Kleijn

IPC分类号： G10L11/00 ,  G10L19/00 ,  G10L19/08 ,  G10L21/02 ,  G10L9/14

CPC分类号： G10L19/12 ,  G10L19/002

摘要： Sparseness is reduced in an input digital signal which includes a first sequence of sample values. An output digital signal is produced in response to the input digital signal. The output digital signal includes a second sequence of sample values, which second sequence of sample values has a greater density of non-zero sample values than the first sequence of sample values.

摘要翻译： 包含第一序列样本值的输入数字信号中的稀疏度降低。 响应于输入数字信号产生输出数字信号。 输出数字信号包括样本值的第二序列，该样本值的第二序列具有比第一序列样本值更大的非零样本值密度。

公开(公告)号：US07124079B1

公开(公告)日：2006-10-17

申请号：US09391768

申请日：1999-09-08

申请人： Ingemar Johansson ,  Erik Ekudden ,  Roar Hagen

发明人： Ingemar Johansson ,  Erik Ekudden ,  Roar Hagen

IPC分类号： G10L21/02

CPC分类号： G10L19/012

摘要： The quality of comfort noise generated by a speech decoder during non-speech periods is improved by modifying comfort noise parameter values normally used to generate the comfort noise. The comfort noise parameter values are modified in response to variability information associated with a background noise parameter. The modified comfort noise parameter values are then used to generate the comfort noise.

摘要翻译： 通过改变通常用于产生舒适噪声的舒适噪声参数值来改善在非语音周期期间由语音解码器产生的舒适噪声的质量。 响应于与背景噪声参数相关联的变异性信息修改舒适噪声参数值。 然后使用改进的舒适噪声参数值来产生舒适噪声。

公开(公告)号：US06732069B1

公开(公告)日：2004-05-04

申请号：US09396300

申请日：1999-09-15

申请人： Erik Ekudden ,  Roar Hagen

发明人： Erik Ekudden ,  Roar Hagen

IPC分类号： G10L1904

CPC分类号： G10L19/083

摘要： A linear predictive analysis-by-synthesis encoder includes a search algorithm block (50) and a vector quantizer (58) for vector quantizing optimal gains from a plurality of subframes in a frame. The internal encoder states are updated (50, 52, 54, 56) using the vector quantized gains.

摘要翻译： 线性预测分析合成编码器包括搜索算法块（50）和矢量量化器（58），用于矢量量化来自帧中的多个子帧的最佳增益。 使用向量量化增益更新内部编码器状态（50,52,54,56）。

公开(公告)号：US06321193B1

公开(公告)日：2001-11-20

申请号：US09238386

申请日：1999-01-27

申请人： Johan Nyström ,  Tomas Svensson ,  Roar Hagen ,  Tor Björn Minde

发明人： Johan Nyström ,  Tomas Svensson ,  Roar Hagen ,  Tor Björn Minde

IPC分类号： G10L1100

CPC分类号： H03M7/3082

摘要： A channel optimized vector quantization apparatus includes a device for weighting a sample vector x by a weighting matrix A and a device for weighting a set of code book vectors ĉr by a weighting matrix B. Device form a set of distance measures {dw(Ax,Bĉr)} representing the distance between the weighted sample vector Ax and each weighted code book vector Bĉr. Other device form a set of distortion measures {&agr;i(x)} by multiplying each distance measure by a channel transition probability Pr|i that an index r has been received at a decoder when an index i has been sent from an encoder and adding together these multiplied distance measures for each possible index r. Finally device determine an index imin corresponding to the smallest distortion measure &agr;i(x) and represents the sample vector by this index imin.

摘要翻译： 信道优化矢量量化装置包括用于通过加权矩阵A对采样矢量x进行加权的装置，以及用于通过加权矩阵B对一组码本向量ĉr进行加权的装置。装置形成一组距离度量{dw（Ax， Bĉr）}表示加权采样矢量Ax与每个加权码本向量Bĉr之间的距离。 其他设备通过将每个距离测量乘以信道转换概率Pr | i来形成一组失真度量{alphai（x）}，当索引i已经从编码器发送并且相加在一起时，在解码器处已经接收到索引r 对于每个可能的索引r，这些相乘的距离度量。 最后，设备确定对应于最小失真度量α（x）的索引值，并通过该索引imin表示样本向量。

公开(公告)号：US08818799B2

公开(公告)日：2014-08-26

申请号：US13179239

申请日：2011-07-08

申请人： Niklas Enbom ,  Roar Hagen ,  Jan Skoglund

发明人： Niklas Enbom ,  Roar Hagen ,  Jan Skoglund

IPC分类号： G10L21/02

CPC分类号： H04M3/561 ,  H04M3/18 ,  H04M2201/12

摘要： A method and an apparatus for indicating presence of a transient noise in a call are provided. The method comprises the steps of determining activity at an endpoint of the call by monitoring presence of a signal input from the endpoint into the call and monitoring presence of a potential source of transient noise at the endpoint. Further, based on the activity determination and the monitoring of the presence of a potential source of transient noise, a signal representative of the presence of a transient noise in the call is sent. The present invention is advantageous in that it enables improvement of the quality of the call.

摘要翻译： 提供一种用于指示呼叫中的瞬态噪声的存在的方法和装置。 该方法包括以下步骤：通过监视从端点输入到呼叫中的信号的存在来确定呼叫的端点处的活动，并监视端点处潜在的瞬态噪声源的存在。 此外，基于活动确定和对潜在的瞬时噪声源的存在的监视，发送表示呼叫中存在瞬态噪声的信号。 本发明的优点在于能够提高呼叫的质量。