公开(公告)号：US5963595A

公开(公告)日：1999-10-05

申请号：US925205

申请日：1997-09-08

申请人： Martin H. Graham ,  Harold H. Webber, Jr.

发明人： Martin H. Graham ,  Harold H. Webber, Jr.

IPC分类号： H04L25/49 ,  H03K7/08

CPC分类号： H04L25/4902

摘要： A method and apparatus for encoding a bit sequence as a symbol, suitable for transmission over POTS wiring, are described. The symbol has a duration indicative of the bit sequence, this time duration be determined by first and second delimiters. The method commences upon the receipt of a bit sequence at an encoder. Thereafter, a symbol, having a duration indicative of the bit sequence, is identified. The symbol is characterized in that it includes a buffer portion and an encoding portion. The buffer portion is of sufficient duration to allow reflections, generated by propagation of the first delimiter of the symbol on the POTS wiring, to decay to a predetermined level before propagation of the second delimiter.

摘要翻译： 描述用于编码比特序列作为符号的方法和装置，其适合于通过POTS布线的传输。 符号具有指示比特序列的持续时间，该持续时间由第一和第二分隔符确定。 该方法在编码器接收到比特序列时开始。 此后，识别具有指示比特序列的持续时间的符号。 该符号的特征在于它包括缓冲部分和编码部分。 缓冲器部分具有足够的持续时间，以允许由POTS布线上的符号的第一分隔符的传播产生的反射在第二定界符传播之前衰减到预定的水平。

公开(公告)号：US5930312A

公开(公告)日：1999-07-27

申请号：US845560

申请日：1997-04-24

申请人： John R. Marum

发明人： John R. Marum

IPC分类号： H04L1/00 ,  H04L5/14 ,  H04L23/00

CPC分类号： H04L5/1446 ,  H04L1/0002 ,  Y02B60/31

摘要： An apparatus and method for automatically selecting different data rates for communicating data over a high bit rate, digital signal line (HDSL) line such as a dry pair line. In one embodiment master/slave interface circuits at opposite ends of a line attempt to establish communications at a higher frequency. If this fails, communications are attempted at a lower frequency. If communications are successful at the higher frequency and communications continue for a predetermined period of time at the higher frequency and then communications fail, an attempt is made to reestablish communications at the higher frequency. An algorithm is set forth for enabling selecting among a plurality of different speeds.

摘要翻译： 一种用于自动选择用于通过高比特率，数字信号线（HDSL）线（例如干线对）传送数据的不同数据速率的装置和方法。 在一个实施例中，线路的相对端处的主/从接口电路尝试以更高的频率建立通信。 如果失败，则尝试以较低的频率进行通信。 如果通信在较高频率下成功，并且通信以较高频率继续预定时间段，然后通信失败，则尝试以较高频率重新建立通信。 提出了一种用于使得能够在多个不同速度之间进行选择的算法。

公开(公告)号：US5812597A

公开(公告)日：1998-09-22

申请号：US638570

申请日：1996-01-30

申请人： Martin H. Graham ,  Matthew Taylor

发明人： Martin H. Graham ,  Matthew Taylor

IPC分类号： H04L25/06 ,  H04L25/00

CPC分类号： H04L25/063

摘要： A receiver for a LAN which uses a transformer for isolation. Base line wander is prevented by use of a positive feedback path which provides a signal that compensates for low frequency loss through the transformer. The feedback path connects the output of the receiver to the secondary winding of the transformer. The time constant of the transformer and terminating resistor L/R equals the RC time constant in the feedback path.

摘要翻译： 用于LAN的接收器，其使用变压器进行隔离。 通过使用提供补偿通过变压器的低频损耗的信号的正反馈路径来防止基线漂移。 反馈路径将接收器的输出连接到变压器的次级绕组。 变压器和终端电阻L / R的时间常数等于反馈路径中的RC时间常数。

公开(公告)号：US08036237B2

公开(公告)日：2011-10-11

申请号：US11956640

申请日：2007-12-14

申请人： Raja Kolli ,  Garrett Mead ,  John Reister ,  Christopher J. Shaver ,  Wendell Sun ,  Mark Tiedeman

发明人： Raja Kolli ,  Garrett Mead ,  John Reister ,  Christopher J. Shaver ,  Wendell Sun ,  Mark Tiedeman

IPC分类号： H04L12/28

CPC分类号： H04L12/2856 ,  H04L12/2865 ,  H04L12/2887 ,  H04L12/289 ,  H04L29/12207 ,  H04L29/12933 ,  H04L61/20 ,  H04L61/6068

摘要： A transparent routing device disposed within an access network configured in accordance with one or more lower-layer protocols is disclosed herein. The device includes a set of subscriber-side ports. Each of the subscriber-side ports is associated with a plurality of virtual subscriber-side interfaces disposed to effectively terminate a corresponding plurality of subscriber-side connections with subscriber host devices served by the access network. The device further includes at least one network-side port through which communication occurs with an external network in accordance with a higher-layer protocol. A routing table is configured to establish a correspondence between network addresses of the subscriber host devices and the plurality of virtual subscriber-side interfaces. During operation of the device, packets received through the at least one network-side port are forwarded to corresponding ones of the virtual subscriber-side interfaces based upon network addresses of the packets.

摘要翻译： 本文公开了布置在根据一个或多个下层协议配置的接入网络内的透明路由设备。 该设备包括一组用户端口。 每个用户侧端口与多个虚拟用户侧接口相关联，多个虚拟用户侧接口被设置为有效地终止与由接入网络服务的用户主机设备相对应的多个用户侧连接。 该设备还包括至少一个网络侧端口，根据较高层协议，与外部网络进行通信的至少一个网络侧端口。 路由表被配置为建立用户主机设备的网络地址与多个虚拟用户侧接口之间的对应关系。 在设备运行期间，基于分组的网络地址，通过至少一个网络侧端口接收到的分组被转发到虚拟用户侧接口中的相应虚拟用户侧接口。

公开(公告)号：US07512220B2

公开(公告)日：2009-03-31

申请号：US11291333

申请日：2005-11-30

申请人： Daran G. Hermans ,  Patrick L. Corder ,  Kevin Braun

发明人： Daran G. Hermans ,  Patrick L. Corder ,  Kevin Braun

IPC分类号： H04M11/00

CPC分类号： H04M19/08 ,  H04B2203/547

摘要： An xDSL modem apparatus for installation on a telephone jack wall plate. The apparatus includes a port for transmitting and receiving carrier waves, a low-pass filtering means, a high-pass filtering means, and a band-pass filtering means. The low-pass filtering means isolates low-frequency component of a received composite carrier wave below a first frequency and transmitting the isolated low-frequency component of the composite carrier wave. The high-pass filtering means isolates a high-frequency component of the composite carrier wave above a second frequency. The band-pass filtering means isolates a power component of the composite carrier wave, the power component being in a frequency range between the first and second frequencies. The apparatus also includes an xDSL modem for demodulating the high-frequency component of the composite carrier wave in order to recover a computer readable bitstream and for modulating a high-frequency carrier wave with a received computer readable bitstream. The xDSL modem transmits the demodulated computer readable bitstream and the modulated carrier wave. The apparatus also includes a means for utilizing the power component of the composite carrier wave to provide operating power for the xDSL modem.

摘要翻译： 一种用于安装在电话插座壁板上的xDSL调制解调器装置。 该装置包括用于发送和接收载波的端口，低通滤波装置，高通滤波装置和带通滤波装置。 低通滤波装置将接收到的复合载波的低频分量隔离成低于第一频率并传输复合载波的隔离低频分量。 高通滤波装置将复合载波的高频分量隔离成高于第二频率。 带通滤波装置隔离复合载波的功率分量，功率分量在第一和第二频率之间的频率范围内。 该装置还包括用于解调复合载波的高频分量的xDSL调制解调器，以便恢复计算机可读比特流并用于利用所接收的计算机可读位流调制高频载波。 xDSL调制解调器发送解调的计算机可读位流和调制的载波。 该装置还包括用于利用复合载波的功率分量为xDSL调制解调器提供工作功率的装置。

公开(公告)号：US07477692B2

公开(公告)日：2009-01-13

申请号：US11610173

申请日：2006-12-13

申请人： Mayer D. Schwartz ,  Jeffrey Kim Jensen

发明人： Mayer D. Schwartz ,  Jeffrey Kim Jensen

IPC分类号： H04N7/12

CPC分类号： H04N21/23406 ,  H04N19/115 ,  H04N19/152 ,  H04N19/40 ,  H04N19/61 ,  H04N21/23424 ,  H04N21/2401 ,  H04N21/2402 ,  H04N21/44004 ,  H04N21/44016 ,  H04N21/6377 ,  H04N21/658 ,  H04N21/812

摘要： A method of splicing video content from a secondary encoded video stream into a primary encoded video stream, the method including the steps of identifying a splice out-time tout and a splice in-time tin, at least T time after tout, in the primary stream; causing the fullness of primary encoder's virtual buffer to be less than XB, where X is greater than 0 and less than 1, at the first decode times after tout and tin; encoding the secondary stream such that an initial coded picture is transmitted in no more than B/(XR) time, and encoding the second stream such that, at a final coded picture's decode time, the fullness of the secondary encoder's virtual buffer is less than XB; and replacing video content of the primary stream from tout through tout+T, with the video data of the second stream.

摘要翻译： 一种将视频内容从次级编码视频流拼接成主编码视频流的方法，所述方法包括以下步骤：在主要编码视频流中识别拼接输出时间和拼接时间，至少在时间t之后的T时间 流; 导致主编码器的虚拟缓冲区的丰满度小于XB，其中X大于0且小于1，在tout和tin之后的第一个解码时间; 对次级流进行编码，使得在不超过B /（XR）时间内发送初始编码图像，并对第二流进行编码，使得在最终编码图像的解码时间，辅助编码器的虚拟缓冲器的丰满度小于 XB; 并且通过tout + T从tout替换主流的视频内容与第二个流的视频数据。

公开(公告)号：US06931059B1

公开(公告)日：2005-08-16

申请号：US09616109

申请日：2000-07-14

申请人： Charles H. Van Dusen ,  Mayer D. Schwartz ,  Guoyao Yu

发明人： Charles H. Van Dusen ,  Mayer D. Schwartz ,  Guoyao Yu

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N21/6373 ,  H04N21/6377 ,  H04N21/658 ,  H04N7/18

CPC分类号： H04N19/40 ,  H04N21/6373 ,  H04N21/6377 ,  H04N21/658

摘要： A rate and delivery time multiplexing for bandwidth optimization algorithm has an allocation portion and a transrating portion. The allocation portion determines how many bits are available for each group of pictures in each program stream that is to be inserted into an outgoing MPEG Transport Stream (MTS). Based upon the allocated bits the transrating portion, when necessary, further compresses the program streams either in the compressed domain when rate reduction is minimal or in the pixel domain when rate reduction is significant. The result is the ability to transmit more video program streams over a given fixed bandwidth pipe for a given level of acceptable picture degradation.

摘要翻译： 用于带宽优化算法的速率和传送时间复用具有分配部分和转换部分。 分配部分确定将要插入到输出MPEG传输流（MTS）的每个节目流中的每组图像可用多少比特。 基于所分配的位，当需要时，当速率降低最小时或者当速率降低显着时在像素域中，必要时，转移部分进一步压缩压缩域中的程序流。 结果是在给定的可接受的图像劣化水平下，通过给定的固定带宽管道传输更多的视频节目流的能力。

公开(公告)号：US06879645B1

公开(公告)日：2005-04-12

申请号：US09153811

申请日：1998-09-15

申请人： Harold H. Webber, Jr. ,  Jeremiah M. Jeffress

发明人： Harold H. Webber, Jr. ,  Jeremiah M. Jeffress

IPC分类号： H04L1/20 ,  H04L25/06 ,  H04L25/08

CPC分类号： H04L25/08 ,  H04L1/20 ,  H04L25/061

摘要： A method of dynamically, and automatically, varying the sensitivity of a receiver coupled to receive signals on a carrier medium, such as for example POTS wiring, includes the step of detecting whether more than a predetermined number of noise events, such as for example traversals of a noise threshold level, occur within a predetermined time. If the predetermined number of noise events occur, the sensitivity of the receiver is automatically varied by a predetermined increment. For example, the noise threshold level may be raised by a predetermined voltage to vary the sensitivity of the receiver.

摘要翻译： 动态地并且自动地改变耦合到载波介质上的接收信号的接收机（例如POTS布线）的灵敏度的方法包括检测是否超过预定数量的噪声事件的步骤，例如遍历 的噪声阈值电平发生在预定时间内。 如果发生预定数量的噪声事件，则接收机的灵敏度自动变化预定的增量。 例如，噪声阈值电平可以提高预定电压以改变接收机的灵敏度。

公开(公告)号：US5963539A

公开(公告)日：1999-10-05

申请号：US925043

申请日：1997-09-08

申请人： Harold H. Webber, Jr. ,  Jeremiah Jeffress

发明人： Harold H. Webber, Jr. ,  Jeremiah Jeffress

IPC分类号： H04L12/28 ,  H04L12/413 ,  H03K7/08

CPC分类号： H04L12/40013 ,  H04L12/413 ,  H04L12/2803 ,  H04L12/2838 ,  H04L2012/2845

摘要： A method and apparatus for detecting a collision between signal transmissions on a carrier medium, such as UTP wiring, are described. The method commences with the transmission of an access identifier from a transmitter of a network device. The transmitted access identifier has a predetermined duration and includes a pulse at a temporal location within the transmitted access identifier specific thereto. An access identifier is also received at a receiver of the network device. The received access identifier also has a predetermined duration, and includes a pulse at a temporal location therein. A determination is then made as to whether the temporal location of the pulse within the received access identifier corresponds to the temporal location of the pulse within the transmitted access identifier. If not, a collision is detected on the network.

摘要翻译： 描述了用于检测诸如UTP布线之类的载体介质上的信号传输之间的冲突的方法和装置。 该方法从网络设备的发射机传输接入标识符开始。 发送的接入标识符具有预定的持续时间并且包括在其所特有的发送的接入标识符内的时间位置处的脉冲。 还在网络设备的接收机处接收访问标识符。 所接收的接入标识符也具有预定的持续时间，并且其中包括在其中的时间位置的脉冲。 然后确定接收到的接入标识符内的脉冲的时间位置是否对应于发送的接入标识符内的脉冲的时间位置。 如果没有，则在网络上检测到冲突。

公开(公告)号：US5696790A

公开(公告)日：1997-12-09

申请号：US538847

申请日：1995-10-04

申请人： Martin H. Graham ,  Matthew Taylor ,  Mark Miller ,  Kevin Braun

发明人： Martin H. Graham ,  Matthew Taylor ,  Mark Miller ,  Kevin Braun

IPC分类号： G06F1/025 ,  H04L12/28 ,  H04L25/493 ,  H03K7/08

CPC分类号： H04L25/493 ,  G06F1/025 ,  H04L12/2803 ,  H04L12/2838 ,  H04L2012/2845

摘要： An encoding and decoding mechanism for communicating digital data where the binary states are represented by a duration of time between transitions of a signal. For instance, the time between zero crossings of a signal are used to represent binary states. These times can be selected so as to avoid ambiguities between the binary state being detected even where the transmission medium is irregular. A typical application is the creation of a LAN in a home using twisted pair telephone lines. The LAN can be made to be transparent and independent of telephone service received over lines shared with the LAN.

摘要翻译： 一种用于传送数字数据的编码和解码机制，其中二进制状态由信号转换之间的持续时间表示。 例如，信号的零交叉之间的时间用于表示二进制状态。 可以选择这些时间，以便即使在传输介质是不规则的情况下也可以避免检测到二进制状态之间的模糊。 典型的应用是在家庭中使用双绞电话线创建LAN。 LAN可以是透明的，独立于通过与LAN共享的线路接收的电话服务。