公开(公告)号：US20130343668A1

公开(公告)日：2013-12-26

申请号：US13927028

申请日：2013-06-25

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： G06T9/00

CPC分类号： H04Q9/00 ,  G06T9/00 ,  G06T9/001 ,  H03M7/30 ,  H04N19/119 ,  H04N19/12 ,  H04N19/174 ,  H04N19/20 ,  H04N19/46 ,  H04N19/50 ,  H04N19/88

摘要： A method for compressing data is disclosed. The method may include receiving data from one or more data sources. The method may also include selectively classifying the data into one or more data streams, the one or more data streams including at least PCM-encoded data and image data. The method may further include separately compressing the PCM-encoded data and the image data into first and second compressed bit-streams. The method may also include shuffling the first and second compressed bit-streams.

摘要翻译： 公开了一种压缩数据的方法。 该方法可以包括从一个或多个数据源接收数据。 该方法还可以包括选择性地将数据分类成一个或多个数据流，所述一个或多个数据流至少包括PCM编码的数据和图像数据。 该方法还可以包括将PCM编码的数据和图像数据分别压缩为第一和第二压缩比特流。 该方法还可以包括混洗第一和第二压缩比特流。

公开(公告)号：US20060171373A1

公开(公告)日：2006-08-03

申请号：US11047747

申请日：2005-02-02

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： H04L12/66

CPC分类号： H04L43/0835 ,  G10L19/005 ,  H04L29/06027 ,  H04L65/80

摘要： A method to reduce memory requirements for a packet loss concealment algorithm in the event of packet loss in a receiver of pulse code modulated voice signals. Packet losses are concealed by using the spectral analysis filter memory to smooth a signal gap and by using a technique for determining a maximum repeatable waveform range instead of using the pitch period to reproduce lost packets. The invention uses fewer processing resources and results in improved performance compared to a packet loss concealment algorithm under G.711 Appendix I standards.

摘要翻译： 在脉冲编码调制语音信号的接收机中发生分组丢失的情况下，减少分组丢失隐藏算法的存储器要求的方法。 通过使用频谱分析滤波器存储器来平滑信号间隙并且通过使用用于确定最大可重复波形范围的技术而不是使用音调周期来再现丢失分组来隐藏分组丢失。 与G.711附录I标准下的分组丢失隐藏算法相比，本发明使用更少的处理资源并且导致改进的性能。

公开(公告)号：US07043428B2

公开(公告)日：2006-05-09

申请号：US09920710

申请日：2001-08-03

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： G10L11/06

CPC分类号： G10L25/78 ,  G10L2021/02168 ,  G10L2025/783

摘要： A method of initializing an ITU Recommendation G.729 Annex B compliant voice activity detection (VAD) device is disclosed, having the steps of (1) determining a first set of running average background noise characteristics in accordance with Recommendation G.729B; (2) determining a second set of running average background noise characteristics; and (3) substituting the second set of running average background noise characteristics for the first set when a specific event occurs. The specific event is a divergence between the first and second sets of running average background noise characteristics.

公开(公告)号：US07031916B2

公开(公告)日：2006-04-18

申请号：US09871779

申请日：2001-06-01

申请人： Dunling Li ,  Daniel C. Thomas ,  Gokhan Sisli

发明人： Dunling Li ,  Daniel C. Thomas ,  Gokhan Sisli

IPC分类号： G10L11/06

CPC分类号： G10L25/78 ,  G10L2021/02168 ,  G10L2025/783

摘要： A method of initializing an ITU Recommendation G.729 Annex B voice activity detection (VAD) device is disclosed, having the steps of (1) extracting a set of parameters from a signal that characterize the signal; (2) calculating an energy measure of the signal from the set of parameters; (3) comparing the energy measure with a reference value; (4) determining an initial value for an average of a noise characteristic of the signal; and (5) counting the number of times the energy measure equals or exceeds the reference level.Also disclosed is a method of converging an ITU Recommendation G.729 Annex B voice activity detection (VAD) device, having the steps of: (1) determining a noise identification threshold value; (2) comparing a number of energy measures of a signal to the noise threshold value; (3) determining a first value representing an average of the number of energy measures, when the energy measure is less than the noise threshold, wherein only the energy measures of the number of energy measures having values less than the noise threshold value are used to determine the first value; (4) determining a second value representing an average of the number of energy measures; and (5) substituting the first value for the second value when a specific event occurs, indicating the divergence of the two values.

公开(公告)号：US07924704B2

公开(公告)日：2011-04-12

申请号：US12537715

申请日：2009-08-24

申请人： John T. Dowdal ,  Sachin Adlakha ,  Dunling Li

发明人： John T. Dowdal ,  Sachin Adlakha ,  Dunling Li

IPC分类号： H04L12/26

CPC分类号： H04L65/80

摘要： A method to reduce memory requirements for a packet loss concealment algorithm in the event of packet loss in a receiver of pulse code modulated voice signals. A voice playout unit in the receiver shares its nominal delay buffer with a history buffer of a packet loss concealment algorithm up to a maximum limit described in a standard. This reduces or eliminates need to allocate memory for the history buffer. A history buffer can also be extended to retain an original portion of voice signal packets received prior to a packet loss as well as generated voice signals as they are generated. A scratch buffer is used as a working buffer and replaces the function of a pitch buffer.

摘要翻译： 在脉冲编码调制语音信号的接收机中发生分组丢失的情况下，减少分组丢失隐藏算法的存储器要求的方法。 接收机中的语音播出单元使用分组丢失隐藏算法的历史缓冲器共享其标称延迟缓冲器，直到标准中描述的最大限度。 这减少或消除了为历史缓冲区分配内存的需要。 还可以扩展历史缓冲器以保留在分组丢失之前接收到的语音信号分组的原始部分以及在生成的语音信号时产生的语音信号。 暂存缓冲区用作工作缓冲区，并替代音调缓冲区的功能。

公开(公告)号：US07899263B2

公开(公告)日：2011-03-01

申请号：US11621889

申请日：2007-01-10

申请人： Dunling Li ,  Murray H. Loew

发明人： Dunling Li ,  Murray H. Loew

IPC分类号： G06K9/36 ,  G06K9/46

CPC分类号： H04N19/86 ,  H04N19/147 ,  H04N19/154 ,  H04N19/60 ,  H04N19/80

摘要： Embodiments of the invention provide methods to calculate compression noise statistics of decompressed images in transform coding. They can be used in compressed image quality assessment, compression algorithm optimization, compression noise reduction, and other quantization and compression related applications.

摘要翻译： 本发明的实施例提供了在变换编码中计算解压缩图像的压缩噪声统计的方法。 它们可用于压缩图像质量评估，压缩算法优化，压缩噪声降低以及其他量化和压缩相关应用。

公开(公告)号：US07292543B2

公开(公告)日：2007-11-06

申请号：US10315188

申请日：2002-12-10

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： H04Q11/00

CPC分类号： H04M7/006 ,  H04M3/56 ,  H04M3/561 ,  H04M3/562 ,  H04M3/568 ,  H04M2203/5072

摘要： A distributed intelligence conferencing system having a plurality of conferencing nodes to connect groups of participants to a conference. Each of the conferencing nodes provides for the connection of one or more participants to the conference. Each node includes a DSP for distributed signal processing. The nodes DSP includes: A signal measuring device for measuring features of the signals from each of the participants. A single core speaker tracking algorithm identifies the active speaker on a local node based upon the relative signal features of each of the number of participant input signals. A communication device communicates the measured signal features for the active local participant input signals only to all other conferencing nodes. A multi core speaker tracking algorithm compares the features of the signals from the speakers on the local node with the features of the signals from the speakers on other nodes. A final determination is made to identify the active speakers for the entire conference so that only the signals from a limited number of speakers transmitted across the system bus.

摘要翻译： 一种分布式智能会议系统，具有多个会议节点，用于将参与者组连接到会议。 每个会议节点提供一个或多个参与者到会议的连接。 每个节点包括用于分布式信号处理的DSP。 节点DSP包括：用于测量来自每个参与者的信号的特征的信号测量装置。 单个核心扬声器跟踪算法基于每个参与者输入信号的相对信号特征来识别本地节点上的有源扬声器。 通信设备仅将所测量的活动本地参与者输入信号的信号特征传送到所有其它会议节点。 多核扬声器跟踪算法将来自本地节点上的扬声器的信号的特征与来自其他节点上的扬声器的信号的特征进行比较。 最终确定确定整个会议的有源扬声器，以便只有来自有限数量的扬声器的信号通过系统总线传输。

公开(公告)号：US20060149536A1

公开(公告)日：2006-07-06

申请号：US11027276

申请日：2004-12-30

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： G10L11/06

CPC分类号： G10L19/012 ,  G10L19/04

摘要： In a packet-based multimedia communication system, such as ITU G.711, using linear prediction parameters to derive the linear prediction error of the codec. The linear prediction error is then used as a feature of the Silence Insertion Descriptor (SID) algorithm. Generating a SID frame by comparing linear prediction errors between frames in the input data stream to a threshold.

摘要翻译： 在诸如ITU G.711之类的基于分组的多媒体通信系统中，使用线性预测参数来导出编解码器的线性预测误差。 然后将线性预测误差用作沉默插入描述符（SID）算法的特征。 通过将输入数据流中的帧之间的线性预测误差进行比较来生成SID帧到阈值。

公开(公告)号：US20050047586A1

公开(公告)日：2005-03-03

申请号：US10652483

申请日：2003-09-02

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： G10L11/02 ,  H04M1/00 ,  H04M3/00 ,  H04Q1/44

CPC分类号： H04Q1/44 ,  G10L25/78

摘要： In a voice activity detection (VAD) device a method for defining tone signals comprises defining a threshold for zero amplitude change, calculating a zero crossing rate of a signal, extracting a set of parameters from a plurality of duration periods of the signal, defining a tolerance threshold between the plurality of duration periods when a zero amplitude change occurs, calculating a maximum difference between the plurality of duration periods, and comparing the maximum difference with the threshold. The method is implemented in the International Telecommunications Union (ITU) recommendation G.729 Annex B VAD.

摘要翻译： 在语音活动检测（VAD）装置中，用于定义音调信号的方法包括定义零幅度变化的阈值，计算信号的零交叉率，从信号的多个持续时间段中提取一组参数， 当发生零幅度变化时，在多个持续时间段之间的容许阈值，计算多个持续时间周期之间的最大差异，以及将最大差异与阈值进行比较。 该方法在国际电信联盟（ITU）建议G.729附件B VAD中实施。

公开(公告)号：US20130342357A1

公开(公告)日：2013-12-26

申请号：US13927043

申请日：2013-06-25

申请人： Dunling Li

发明人： Dunling Li

IPC分类号： G08C19/00

CPC分类号： G08C19/00 ,  H03M7/30 ,  H03M7/3059 ,  H03M7/6064

摘要： A method for compressing data is disclosed. The method may include classifying the data from a plurality of data sources into classifications including at least PCM-encoded data and data structure information. The method may also include determining data states associated with the PCM-encoded data and the data structure information. The method may further include compressing the PCM-encoded data and the data structure information into compressed bit-streams based on the determined data states. The method may also include shuffling the compressed bit-streams to introduce randomness.

摘要翻译： 公开了一种压缩数据的方法。 该方法可以包括将来自多个数据源的数据分类为至少包括PCM编码的数据和数据结构信息的分类。 该方法还可以包括确定与PCM编码数据和数据结构信息相关联的数据状态。 该方法还可以包括基于确定的数据状态将PCM编码数据和数据结构信息压缩成压缩比特流。 该方法还可以包括混合压缩比特流以引入随机性。