公开(公告)号：US08121116B1

公开(公告)日：2012-02-21

申请号：US12130305

申请日：2008-05-30

申请人： Michael Healy ,  Yuen-Wen Lee ,  Yi Tong Tse

发明人： Michael Healy ,  Yuen-Wen Lee ,  Yi Tong Tse

IPC分类号： H04L12/28

CPC分类号： H04L47/564

摘要： In one embodiment, a gateway between a variable delay network and a constant delay network receives over the variable delay network a plurality of data streams to be multiplexed over a modulated channel extending through the constant delay network. A first processing component of the gateway generates command-packet-descriptors corresponding to content packets included in the received data streams. A second processing component of the gateway uses transmit time indications included in the command-packet-descriptors to schedule transmission of modulated packets representing the received data streams over the modulated channel.

摘要翻译： 在一个实施例中，可变延迟网络和恒定延迟网络之间的网关在可变延迟网络上接收要在延伸通过恒定延迟网络的调制信道上复用的多个数据流。 网关的第一处理部件生成与包含在接收数据流中的内容分组对应的命令分组描述符。 网关的第二处理组件使用包括在命令分组描述符中的发射时间指示来调度通过调制信道表示接收的数据流的调制分组的传输。

公开(公告)号：US07720077B1

公开(公告)日：2010-05-18

申请号：US12125876

申请日：2008-05-22

申请人： Michael Healy ,  Yuen-Wen Lee ,  Yihuan Sun

发明人： Michael Healy ,  Yuen-Wen Lee ,  Yihuan Sun

IPC分类号： H04L12/28

CPC分类号： H04L12/2801 ,  H04J3/0685 ,  H04L1/004 ,  H04L47/10

摘要： In one embodiment, a gateway for a constant delay network identifies a baseband clock that is synchronized by exchanging synchronization messages over a packet switched network. The gateway then generates a strobe by manipulating the identified baseband clock using a custom multiplier that is selected according to transmission variables. The gateway then signals a front end component to process fixed length packets for transfer to a back end component according to the generated strobe, which can reduce or eliminate buffering by the back end component and can improve cable modem operation.

摘要翻译： 在一个实施例中，用于恒定延迟网络的网关通过在分组交换网络上交换同步消息来识别同步的基带时钟。 然后，网关通过使用根据传输变量选择的定制乘数来操纵所识别的基带时钟来生成选通。 然后，网关发信号通过前端组件来处理固定长度的分组，以根据生成的选通信号传输到后端组件，这可以减少或消除后端组件的缓冲，并可以改善电缆调制解调器的操作。

公开(公告)号：US07173945B1

公开(公告)日：2007-02-06

申请号：US10096191

申请日：2002-03-11

申请人： Hain-Ching Liu ,  Dayin Gou ,  Yuen-Wen Lee

发明人： Hain-Ching Liu ,  Dayin Gou ,  Yuen-Wen Lee

IPC分类号： H04J3/06 ,  H04L7/00

CPC分类号： H04J3/0632

摘要： The present invention addresses the issue of jitter compounded by clock drifting in streaming media applications. In addressing jitter, the present invention attempts to recover the desired (de-jittered) arrival time at a gateway even if there is a frequency difference between the clocks of the original media source and the gateway. The desired arrival time is used with the addition of a constant to schedule the packet delivery time for delivery to a user via a network. Each packet arriving at the gateway contains an arrival timestamp. Using packets, which also contain sending time stamps, the invention determines the delivery time for each packet.

摘要翻译： 本发明解决了在流媒体应用中由时钟漂移复合的抖动问题。 在寻址抖动中，本发明尝试在网关上恢复期望的（去抖动的）到达时间，即使在原始媒体源和网关的时钟之间存在频率差。 期望的到达时间与添加常数一起使用，以调度分组递送时间以通过网络递送给用户。 到达网关的每个数据包都包含到达时间戳。 使用也包含发送时间戳的分组，本发明确定每个分组的传送时间。

公开(公告)号：US06763070B1

公开(公告)日：2004-07-13

申请号：US09870177

申请日：2001-05-29

申请人： Yuen-Wen Lee

发明人： Yuen-Wen Lee

IPC分类号： H04N730

CPC分类号： H04N19/40 ,  H04N19/132 ,  H04N19/146 ,  H04N19/164 ,  H04N19/18 ,  H04N19/61

摘要： Methods and apparatus are provided for selecting a cut-off index to filter transform coefficients associated with an input bitstream to provide filtered transform coefficients associated with a rescaled output bitstream. An arrangement of transform coefficients associated with an input data sequence (e.g. an audio segment or a video image block) is filtered using a cut-off index to provide modified transform coefficients associated with a modified output data sequence. Information including information about the input data sequence and the modified output data sequence can be used to update the filter cut-off index for reduction of future data sequences.

摘要翻译： 提供了用于选择截止指数以滤除与输入比特流相关联的变换系数的方法和装置，以提供与重新缩放的输出比特流相关联的滤波变换系数。 使用截止指数来过滤与输入数据序列（例如音频段或视频图像块）相关联的变换系数的布置，以提供与修改的输出数据序列相关联的修改的变换系数。 可以使用包括关于输入数据序列和修改的输出数据序列的信息的信息来更新滤波器截止指数以减少将来的数据序列。