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17 条记录 (耗时 0.011 秒)

    System and method for distributed noise suppression
    1.
    发明授权
    System and method for distributed noise suppression 有权
    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。

    Speech coding including soft adaptability feature
    2.
    发明授权
    Speech coding including soft adaptability feature 失效
    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。

    Reducing sparseness in coded speech signals
    3.
    发明授权
    Reducing sparseness in coded speech signals 有权
    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。

    Delayed packet concealment method and apparatus
    6.
    发明授权
    Delayed packet concealment method and apparatus 有权
    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。

    Adaptive combining of multi-mode coding for voiced speech and noise-like signals
    7.
    发明授权
    Adaptive combining of multi-mode coding for voiced speech and noise-like signals 有权
    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。

    High resolution post processing method for a speech decoder
    8.
    发明授权
    High resolution post processing method for a speech decoder 失效
    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。

    Speech coding including soft adaptability feature
    9.
    发明授权
    Speech coding including soft adaptability feature 有权
    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。