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1. 发明授权

US07225001B1 System and method for distributed noise suppression 有权
标题翻译：分布式噪声抑制的系统和方法
公开(公告)号：US07225001B1
公开(公告)日：2007-05-29
申请号：US09556579
申请日：2000-04-24
申请人： Anders Eriksson , Erik Ekudden
发明人： Anders Eriksson , Erik Ekudden
IPC分类号： H04M1/00
CPC分类号： G10L19/00 , G10L21/0364
摘要： The present invention advantageously provides a manner by which to further suppress noise superimposed upon an information signal without increasing distortion to the signal, e.g., speech. By distributing the noise suppression, the quality of the information signal provided to a listener is improved. In one embodiment, a first noise suppressor is employed at the transmitter to suppress noise superimposed upon an information signal prior to its transmission by the transmitter, and a second noise suppressor is employed at the receiver to suppress the noise component of a communication signal received at the receiver.
摘要翻译：本发明有利地提供了一种方式来进一步抑制叠加在信息信号上的噪声，而不增加对信号（例如语音）的失真。通过分配噪声抑制，提高给收听者的信息信号的质量得到改善。在一个实施例中，在发射机处采用第一噪声抑制器来抑制由发射机发射之前叠加在信息信号上的噪声，并且在接收机处采用第二噪声抑制器来抑制在接收机处接收到的通信信号的噪声分量收件人。

2. 发明授权

US6058359A Speech coding including soft adaptability feature 失效
标题翻译：语音编码包括软适应性特征
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。

3. 发明授权

US06301556B1 Reducing sparseness in coded speech signals 有权
标题翻译：编码语音信号减少稀疏
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。

4. 发明授权

US6163577A Source/channel encoding mode control method and apparatus 失效
标题翻译：源/信道编码模式控制方法和装置
公开(公告)号：US6163577A
公开(公告)日：2000-12-19
申请号：US845468
申请日：1997-04-25
申请人： Erik Ekudden , Jim Sundqvist , Tor Bjorn Minde , Karl Hellwig
发明人： Erik Ekudden , Jim Sundqvist , Tor Bjorn Minde , Karl Hellwig
IPC分类号： H04B7/005 , H04L1/00 , H04B14/04
CPC分类号： H04W52/265 , H04L1/0009 , H04L1/0014 , H04L1/0025 , H04L1/0032 , H04L1/0038 , H04L1/007 , H04W24/10 , H04W28/22 , H04W52/267
摘要： A source/channel encoding mode control method in a TDMA radio communication system determines the current type of source signal to be encoded and transmitted, restricts encoding to a class of source/channel encoding modes compatible with the determined type of source signal, determines a quality measure for previously transmitted signals that have been received and decoded, and selects based on the quality measure, the most suitable source/channel encoding mode for the determined class.
摘要翻译： TDMA无线通信系统中的源/信道编码模式控制方法确定要编码和发送的源信号的当前类型，将编码限制为与所确定类型的源信号兼容的一类源/信道编码模式，确定质量测量已经接收和解码的先前发送的信号，并且基于质量测量来选择用于确定类的最合适的源/信道编码模式。

5. 发明授权

US6029125A Reducing sparseness in coded speech signals 失效
标题翻译：编码语音信号减少稀疏
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。

6. 发明授权

US06721327B1 Delayed packet concealment method and apparatus 有权
标题翻译：延迟包隐藏方法和装置
公开(公告)号：US06721327B1
公开(公告)日：2004-04-13
申请号：US09312557
申请日：1999-05-14
申请人： Erik Ekudden , Tomas Gunde Svensson , Jim Sundqvist
发明人： Erik Ekudden , Tomas Gunde Svensson , Jim Sundqvist
IPC分类号： H04B110
CPC分类号： H04L12/6418 , H04L2012/6481
摘要： A decoder improves delayed packet concealment in a packet network by using two decoder sections. A first decoder section bases its decoding during the concealment phase on erroneous filter states and a set of speech parameters, whereas a second decoder section bases its decoding on saved and updated filter states and the same speech parameters. The outputs of the two decoder sections are thereafter combined to form the final speech signal. This decoding strategy produces a speech signal with smooth transitions from delayed to non-delayed packets and uses information from the most recent packets for speech generation.
摘要翻译：解码器通过使用两个解码器部分来改进分组网络中的延迟分组隐藏。第一解码器部分在隐藏阶段的解码基于错误的滤波器状态和一组语音参数，而第二解码器部分的解码基于保存和更新的滤波器状态和相同的语音参数。之后组合两个解码器部分的输出以形成最终语音信号。该解码策略产生具有从延迟到非延迟分组的平滑过渡的语音信号，并且使用来自最新分组的信息用于语音产生。

7. 发明授权

US06192335B1 Adaptive combining of multi-mode coding for voiced speech and noise-like signals 有权
标题翻译：用于有声语音和类噪声信号的多模式编码的自适应组合
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。

8. 发明授权

US6138093A High resolution post processing method for a speech decoder 失效
标题翻译：用于语音解码器的高分辨率后处理方法
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。

9. 发明授权

US06564183B1 Speech coding including soft adaptability feature 有权
标题翻译：语音编码包括软适应性特征
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。

10. 发明授权

US06424938B1 Complex signal activity detection for improved speech/noise classification of an audio signal 有权
标题翻译：用于改善音频信号的语音/噪声分类的复杂信号活动检测
公开(公告)号：US06424938B1
公开(公告)日：2002-07-23
申请号：US09434787
申请日：1999-11-05
申请人： Ingemar Johansson , Erik Ekudden , Jonas Svedberg , Anders Uvliden
发明人： Ingemar Johansson , Erik Ekudden , Jonas Svedberg , Anders Uvliden
IPC分类号： G10L1908
CPC分类号： G10L25/78 , G10L2025/783
摘要： Perceptually relevant non-speech information can be preserved during encoding of an audio signal by determining whether the audio signal includes such information. If so, a speech/noise classification of the audio signal is overriden to prevent misclassification of the audio signal as noise.
摘要翻译：通过确定音频信号是否包括这样的信息，可以在音频信号的编码期间保留感知相关的非语音信息。如果是这样，则音频信号的语音/噪声分类被覆盖以防止音频信号被错误地分类为噪声。

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