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1. 发明授权

US06208274B1 Transmission system using a variable length encoder 失效
标题翻译：传输系统采用可变长度编码器
公开(公告)号：US06208274B1
公开(公告)日：2001-03-27
申请号：US09113964
申请日：1998-07-10
申请人： Rakesh Taori , Robert J. Sluijter , Andreas J. Gerrits
发明人： Rakesh Taori , Robert J. Sluijter , Andreas J. Gerrits
IPC分类号： H03M740
CPC分类号： H03M7/42
摘要： In a transmission system a variable length encoder is used to reduce the average bitrate of a sequence of symbols. In order to limit the maximum length of the code it is proposed to transmit the sequence of symbols only in coded form if the length of the coded sequence is lower than a predetermined value
摘要翻译：在传输系统中，可变长度编码器用于减小符号序列的平均比特率。为了限制代码的最大长度，如果编码序列的长度低于预定值，则建议仅以编码形式发送符号序列

2. 发明授权

US5878081A Transmission system for quasi periodic signals 失效
标题翻译：准周期信号传输系统
公开(公告)号：US5878081A
公开(公告)日：1999-03-02
申请号：US949648
申请日：1997-10-14
申请人： Robert J. Sluijter , Eric Kathmann , Rakesh Taori
发明人： Robert J. Sluijter , Eric Kathmann , Rakesh Taori
IPC分类号： G10L19/097 , G11B20/10 , H03M7/30 , H04B1/00 , H04B14/04
CPC分类号： G10L19/097 , G11B20/10527
摘要： In a transmission system for a quasi-periodic signal, an encoder (12) transmits to a decoder (28) no more than a single period from a total number of periods of the quasi-periodic signal in encoded form. In this decoder (28) the lacking periods of the quasi-periodic signal are reconstructed by means of interpolation. For obtaining an enhanced quality of the reconstructed signal, a signal segment is transmitted that is representative of two successive periods of the quasi-periodic signal. This signal segment may contain two successive periods, but may also be a signal segment having the length of a single period and being determined by a weighted sum of two successive periods.
摘要翻译：在用于准周期性信号的传输系统中，编码器（12）从编码形式的准周期信号的周期的总数不超过一个周期向解码器（28）发送。在该解码器（28）中，通过插值重构准周期信号的缺少周期。为了获得重构信号的增强质量，传输代表准周期信号的两个连续周期的信号段。该信号段可以包含两个连续的周期，但也可以是具有单个周期的长度并由两个连续周期的加权和确定的信号段。

3. 发明授权

US5109488A Data processing system buffering sequential data for cyclically recurrent delay times, memory address generator for use in such system 失效
标题翻译：数据处理系统缓冲周期性延迟时间的顺序数据，用于这种系统的存储器地址发生器
公开(公告)号：US5109488A
公开(公告)日：1992-04-28
申请号：US316720
申请日：1989-02-28
申请人： Hendrik Dijkstra , Cornelis M. Huizer , Robert J. Sluijter
发明人： Hendrik Dijkstra , Cornelis M. Huizer , Robert J. Sluijter
IPC分类号： G06F5/06 , G06F7/78 , G06F12/02 , G11C19/00
CPC分类号： G06F7/785
摘要： A data processing system buffers sequential data for the duration of cyclically recurrent delay times. Memory location allocation is performed in such a way, that the memory is used efficiently without data-shifting after a read-out, and that the address generator is fairly simple.

4. 发明授权

US5103311A Data processing module and video processing system incorporating same 失效
标题翻译：数据处理模块和视频处理系统
公开(公告)号：US5103311A
公开(公告)日：1992-04-07
申请号：US593366
申请日：1990-10-01
申请人： Robert J. Sluijter , Cornelis M. Huizer , Hendrik Dijkstra , Gerrit A. Slavenburg
发明人： Robert J. Sluijter , Cornelis M. Huizer , Hendrik Dijkstra , Gerrit A. Slavenburg
IPC分类号： G06F3/14 , G06F9/30 , G06F9/38 , G06F15/16 , G06T1/20
CPC分类号： G06T1/20 , G06F9/3885
摘要： The invention describes a processor system suitable for processing video signal samples on a real-time basis. Signals are derived from the samples for driving an imaging unit. For this purpose, one or more processor modules are provided with processor elements, operating in parallel in time, which are connected to a crossbar switch. A module contains at least one arithmetic/logic processor element and at least one memory processor element. Moreover, there is a clock device, the frequency of which bears a fixed relationship to the frequency with which the video signal samples are obtained.
摘要翻译：本发明描述了适用于实时地处理视频信号样本的处理器系统。来自用于驱动成像单元的样本的信号。为此，一个或多个处理器模块设置有与时间并行操作的处理器元件，其连接到交叉开关。模块包含至少一个算术/逻辑处理器元件和至少一个存储器处理器元件。此外，还有一个时钟装置，其频率与获得视频信号样本的频率具有固定的关系。

5. 发明授权

US6078879A Transmitter with an improved harmonic speech encoder 失效
标题翻译：具有改进的谐波语音编码器的发射机
公开(公告)号：US6078879A
公开(公告)日：2000-06-20
申请号：US114749
申请日：1998-07-13
申请人： Rakesh Taori , Robert J. Sluijter , Andreas J. Gerrits
发明人： Rakesh Taori , Robert J. Sluijter , Andreas J. Gerrits
IPC分类号： G10L25/12 , G10L19/04 , G10L19/10 , G10L21/02 , G10L25/90 , G10L19/00 , G10L19/08
CPC分类号： G10L25/90 , G10L19/10
摘要： In a harmonic speech encoder (16) a speech signal to be encoded is represented by a plurality of LPC parameters which are determined by a LPC parameter computer (30), a pitch value and a gain value. The speech encoder comprises a (coarse) pitch estimator (38) for determining a coarse pitch, and a refined pitch computer (32) to determine a refined pitch from the coarse pitch value. The refined pitch value is determined in an analysis by synthesis way, in which a refined pitch value is selected which results in a minimum error measure between a representation of a synthesized speech signal and a representation of the original speech signal.
摘要翻译：在谐音语音编码器（16）中，要由LPC参数计算机（30）确定的多个LPC参数，音调值和增益值来表示要编码的语音信号。语音编码器包括用于确定粗音调的（粗）音调估计器（38）和精调音调计算机（32），用于根据粗音调值确定精细音调。在通过合成方式的分析中确定精细音调值，其中选择精细音调值，其导致合成语音信号的表示和原始语音信号的表示之间的最小误差测量。

6. 发明授权

US6014619A Reduced complexity signal transmission system 失效
标题翻译：降低复杂度信号传输系统
公开(公告)号：US6014619A
公开(公告)日：2000-01-11
申请号：US798889
申请日：1997-02-11
申请人： Friedhelm Wuppermann , Eric Kathmann , Robert J. Sluijter , Fransiscus M. J. De Bont
发明人： Friedhelm Wuppermann , Eric Kathmann , Robert J. Sluijter , Fransiscus M. J. De Bont
IPC分类号： G10L19/12 , H03M7/30 , G10L9/14
CPC分类号： G10L19/12
摘要： In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. In order to reduce the complexity of the search for the best excitation signal, thee selection is done in two stages. First a preselection of a small number of excitation sequences is made using a reduced complexity synthesis filter. Thereafter, with this small number of excitation sequences, a full complexity search is made. Due to the reduced number of excitation sequences involved in the final selection the required computational complexity is reduced.
摘要翻译：在CELP编码器中，进行目标信号和多个合成信号之间的比较。通过具有从目标信号导出的参数的合成滤波器对多个激励序列进行滤波而导出合成信号。选择导致目标信号和合成信号之间的最小误差的激励信号。为了降低寻找最佳激励信号的复杂度，选择分为两个阶段。首先，使用降低复杂度的合成滤波器来进行少量激励序列的预选。此后，利用这个少量的激励序列，进行完全复杂的搜索。由于在最终选择中涉及的激励序列数量减少，所需的计算复杂度降低。

7. 发明授权

US4752956A Digital speech coder with baseband residual coding 失效
标题翻译：具有基带残差编码的数字语音编码器
公开(公告)号：US4752956A
公开(公告)日：1988-06-21
申请号：US708771
申请日：1985-03-06
申请人： Robert J. Sluijter
发明人： Robert J. Sluijter
IPC分类号： G10L19/06 , H04B14/04 , G10L5/00
CPC分类号： G10L19/06
摘要： A digital speech coder of the baseband RELP-type (Residual-Excited Linear Prediction) comprises a transmitter (1) having an LPC-anaylser (10), a first adaptive inverse filter (11), a decimation lowpass filter (26) for selecting the baseband prediction residue and an encoding-and-multiplexing circuit (17), and a receiver (2) having a demultiplexing-and-decoding circuit (21), an interpolator (27) and a first adaptive synthesizing filter (14). The occurrence of "tonal noises" due to the spectral folding in interpolator (27) is effectively counteracted by arranging prior to the decimation lowpass filter (26) in the transmitter (1) a second adaptive inverse filter (28) which with the aid of an autocorrelator (31) removes possible periodicy from the speech band residue, and by including subsequent to the interpolator (27) in the receiver (2) a corresponding second adaptive synthesis filter (32), which reintroduces the desired periodicity in the excitation signal.
摘要翻译：基带RELP型（残余激励线性预测）的数字语音编码器包括具有LPC分析器（10）的发射机（1），第一自适应逆滤波器（11），用于选择的抽取低通滤波器（26）基带预测残差和编码和复用电路（17），以及具有解复用和解码电路（21），内插器（27）和第一自适应合成滤波器（14）的接收机（2）。由于在内插器（27）中的频谱折叠引起的“音调噪声”的发生通过在发射机（1）中的抽取低通滤波器（26）之前布置第二自适应逆滤波器（28）而被有效地抵消，借助于第二自适应逆滤波器自相关器（31）从语音频带残余中去除可能的周期，并且通过在接收机（2）中包括随后的内插器（27），相应的第二自适应合成滤波器（32），其在激励信号中重新引入期望的周期。

8. 发明授权

US06985855B2 Transmission system with improved speech decoder 失效
标题翻译：具有改进语音解码器的传输系统
公开(公告)号：US06985855B2
公开(公告)日：2006-01-10
申请号：US10084714
申请日：2002-02-25
申请人： Robert J. Sluijter , Rakesh Taori
发明人： Robert J. Sluijter , Rakesh Taori
IPC分类号： G10L19/00
CPC分类号： G10L19/04 , G10L19/22
摘要： A transmission system includes a speech decoder, the speech decoder having a detector which determines a level of background noise in a speech signal and a post filter in electrical communication with an output of the decoder when the level of the background noise is equal to or less than a threshold value. A synthesis filter is connected to the output when the level of the background noise is greater than the threshold value.
摘要翻译：传输系统包括语音解码器，语音解码器具有检测器，该检测器确定语音信号中的背景噪声的电平，以及当背景噪声的电平等于或等于超过阈值。当背景噪声的电平大于阈值时，合成滤波器连接到输出。

9. 发明授权

US06363340B1 Transmission system with improved speech encoder 失效
标题翻译：具有改进语音编码器的传输系统
公开(公告)号：US06363340B1
公开(公告)日：2002-03-26
申请号：US09316984
申请日：1999-05-24
申请人： Robert J. Sluijter , Rakesh Taori
发明人： Robert J. Sluijter , Rakesh Taori
IPC分类号： G10L1904
CPC分类号： G10L19/04 , G10L19/22
摘要： A speech transmission system with an input speech signal applied to a speech encoder for encoding the speech signal which is transmitted via a communication channel to a speech decoder. Background noise dependent processing elements in the speech encoder and/ or speech decoder are introduced to improve the performance of the transmission system. The parameters of the perceptual weighting filter in the speech encoder are derived by calculating linear prediction coefficients from a speech signal which is processed by means of a high pass filter. An adaptive post filter in a speech decoder is bypassed when the noise level exceeds a threshold value.
摘要翻译：一种具有输入语音信号的语音传输系统，该语音信号被应用于语音编码器，用于对经由通信信道发送到语音解码器的语音信号进行编码。引入了语音编码器和/或语音解码器中背景噪声相关的处理元件以改善传输系统的性能。通过从通过高通滤波器处理的语音信号中计算线性预测系数，导出语音编码器中的感知加权滤波器的参数。当噪声电平超过阈值时，语音解码器中的自适应后置滤波器被旁路。

10. 发明授权

US5963895A Transmission system with speech encoder with improved pitch detection 失效
标题翻译：具有语音编码器的传输系统，具有改进的音高检测
公开(公告)号：US5963895A
公开(公告)日：1999-10-05
申请号：US645544
申请日：1996-05-10
申请人： Rakesh Taori , Robert J. Sluijter , Eric Kathmann
发明人： Rakesh Taori , Robert J. Sluijter , Eric Kathmann
IPC分类号： G10L25/06 , G10L25/90 , G10L9/08
CPC分类号： G10L25/90 , G10L25/06
摘要： A transmission system contains a speech coder which utilizes a pitch detector that is arranged to select a characteristic auxiliary signal portion from the signal to be coded in order to improve the quality of the pitch detection. The pitch is found by searching in the speech signal for signal portions that correspond to the characteristics auxiliary signal portion and by calculating the time difference between the respective signal portions.
摘要翻译：一种传输系统包含语音编码器，该语音编码器利用音调检测器，该音调检测器被布置为从要编码的信号中选择特征辅助信号部分，以便提高音调检测的质量。通过在语音信号中搜索对应于特征辅助信号部分的信号部分并通过计算各个信号部分之间的时间差来发现音调。

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