公开(公告)号：US07002933B1

公开(公告)日：2006-02-21

申请号：US09684407

申请日：2000-10-06

申请人： Tommy C. Poon ,  Jay Bao ,  Philip Orlik

发明人： Tommy C. Poon ,  Jay Bao ,  Philip Orlik

IPC分类号： H04B7/14

CPC分类号： H04W88/04 ,  H04L29/06 ,  H04L69/22

摘要： A wireless mobile communication network allows mobile, nodes, such as cellular telephone, and other types of mobile transceivers, to communicate with a fixed base station and directly with one another. This mobile to mobile communication capability is exploited through the formation of a local link where nodes with excess processing and bandwidth capacity forward messages at the request of the base station. The formation of the local link is adaptive and does not require a central controller. The wireless mobile network includes a base station and mobile nodes. Nodes are configured as a major nodes when they communicate information directly with the base station via a network link. Nodes are configured as minor nodes when they communicate the information indirectly with the base station via a direct local link with one of the major nodes to form a locally linked mobile network within the wireless mobile communications network. Each mobile node includes a header detector, coupled to a receiver and a decoder of the node to detect a header in a frame used to communicate the information, and a message processor, coupled to the header detector and a transmitter, to route the frame to the minor node.

摘要翻译： 无线移动通信网络允许诸如蜂窝电话和其他类型的移动收发器之类的移动节点与固定基站进行通信并直接彼此通信。 通过形成本地链路来利用该移动到移动通信能力，其中具有多余处理的节点和带宽容量根据基站的请求转发消息。 本地链路的形成是自适应的，不需要中央控制器。 无线移动网络包括基站和移动节点。 当节点通过网络链路直接与基站通信时，将节点配置为主要节点。 当它们经由与主要节点之一的直接本地链路与基站间接地传送信息时，节点被配置为次要节点，以在无线移动通信网络内形成本地链接的移动网络。 每个移动节点包括头部检测器，耦合到节点的接收器和解码器以检测用于传送信息的帧中的标题，以及耦合到标题检测器和发射机的消息处理器，以将帧路由到 次要节点。

公开(公告)号：US6128357A

公开(公告)日：2000-10-03

申请号：US997772

申请日：1997-12-24

申请人： Cheng-Youn Lu ,  Jay Bao ,  Tommy C. Poon

发明人： Cheng-Youn Lu ,  Jay Bao ,  Tommy C. Poon

IPC分类号： H03H17/06 ,  H04L7/02 ,  H04L7/033 ,  H04L7/00 ,  H03D3/24 ,  H04L25/40 ,  H04L25/36

CPC分类号： H04L7/0029 ,  H04L7/0335

摘要： An adaptable, variable rate symbol timing recovery system for a digital sal receiver comprises an analog to digital (A-D) signal converter having analog signal input and digital data signal output terminals. A source of selectable, substantially fixed rate, data sampling clock signals is coupled to the A-D signal converter for sampling a signal received at the input at a predetermined, substantially fixed clock rate, depending on data rate and modulation of the received signal. A digital signal processing loop is coupled to the digital data signal output terminal for adjustably producing interdependent signals in synchronism with the data signals at the output terminal which are asynchronous with respect to the fixed rate clock signals. A Controller is provided for selectively configuring the data sampling clock signal source and the digital signal processing loop according to the data rate and modulation characteristics of the received signal.

摘要翻译： 用于数字信号接收机的适应性可变速率符号定时恢复系统包括具有模拟信号输入和数字数据信号输出端的模数（A-D）信号转换器。 可选择的基本上固定的速率的数据采样时钟信号的源极耦合到A-D信号转换器，用于根据接收信号的数据速率和调制对预定的基本上固定的时钟速率在输入处接收到的信号进行采样。 数字信号处理环路耦合到数字数据信号输出端子，用于与输出端子上相对于固定速率时钟信号异步的数据信号同步地产生相互依赖的信号。 提供控制器，用于根据接收信号的数据速率和调制特性有选择地配置数据采样时钟信号源和数字信号处理环路。

公开(公告)号：US5835151A

公开(公告)日：1998-11-10

申请号：US648358

申请日：1996-05-15

申请人： Huifang Sun ,  Jay Bao ,  Tommy C. Poon

发明人： Huifang Sun ,  Jay Bao ,  Tommy C. Poon

IPC分类号： H04N7/01 ,  H04N7/26

CPC分类号： H04N7/0125 ,  H04N19/40 ,  H04N19/85

摘要： A method and apparatus for down-converting a digital video signal includes a synthesizer and a converter. The synthesizer receives a digital video signal including at least first and second DCT blocks of DCT coefficients, and synthesizes the first and second DCT blocks into a single synthesized DCT block having dimensions equal to the first and second DCT blocks. The converter converts the synthesized DCT block from the DCT domain to the spatial domain to produce an output digital video signal.

摘要翻译： 用于下变频数字视频信号的方法和装置包括合成器和转换器。 合成器接收包括DCT系数的至少第一和第二DCT块的数字视频信号，并将第一和第二DCT块合成为具有等于第一和第二DCT块的尺寸的单个合成DCT块。 转换器将合成DCT块从DCT域转换为空间域，以产生输出数字视频信号。

公开(公告)号：US06671328B1

公开(公告)日：2003-12-30

申请号：US09287125

申请日：1999-04-07

申请人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

发明人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

IPC分类号： H04L2720

CPC分类号： H04L27/0008

摘要： A signal having one of a plurality of modulation formats is formed by encoding first data in accordance with a particular one of the modulation formats. The encoded first data is then combined with second data identifying the particular modulation format of the encoded first data to form the signal.

摘要翻译： 通过根据调制格式中的特定一种对第一数据进行编码来形成具有多种调制格式之一的信号。 然后将编码的第一数据与识别编码的第一数据的特定调制格式的第二数据组合以形成信号。

公开(公告)号：US06192070B1

公开(公告)日：2001-02-20

申请号：US09002438

申请日：1998-01-02

申请人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

发明人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

IPC分类号： H04B138

CPC分类号： H04B1/005 ,  H04B1/406 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/0032 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2601

摘要： A universal modem has a software-configurable modulator/demodulator which accommodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through a single device in which the modem has reconfigurable logic to accommodate the format of the signals being received or transmitted. In one embodiment, the system tracks channel noise and changes modulation format at both the transmit and receive sides of the system through the use of a controller that controls both sides.

摘要翻译： 通用调制解调器具有软件可配置的调制器/解调器，其适应与地面，电缆，电话线，卫星和无线通信相关联的不同调制格式，以通过单个设备发送和接收，其中调制解调器具有可重构逻辑以容纳 正在接收或发送信号的格式。 在一个实施例中，系统通过使用控制两侧的控制器来跟踪信道噪声并改变系统的发射侧和接收侧的调制格式。

公开(公告)号：US5940438A

公开(公告)日：1999-08-17

申请号：US801748

申请日：1997-02-18

申请人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

发明人： Tommy C. Poon ,  Jay Bao ,  Yoshiki Mizutani ,  Hiroyuki Nakayama

IPC分类号： H04N7/10 ,  H04J11/00 ,  H04L27/00 ,  H04L27/18 ,  H04L27/34 ,  H04L29/06 ,  H04B1/38 ,  H01L27/10 ,  H01L27/18 ,  H01L5/16

CPC分类号： H04L27/0008

摘要： A universal modem has a software-configurable modulator/demodulator which commodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through a single device in which the modem has reconfigurable logic to accommodate the format of the signals being received or transmitted. Note that the modulator or demodulator can be used separately or the two units can be combined and used for transceivers, with either the same software configuring both the modulator and demodulator, or with different software used for the two units. In the receive mode, the universal modem detects the modulation format of the incoming signal and reconfigures the logic of its software-configurable demodulator to output demodulated digital data for further processing. In the transmit mode, information to be transmitted is provided with the appropriate modulation format by setting a software-configurable modulator in the universal modem to the particular format. In one embodiment, in the receive mode the incoming signal is A-D converted, with a host processor utilized to detect the type of modulation associated with the incoming signal and through a configuration controller configures a random access memory which is coupled to the software-configurable demodulator. In advanced television applications, the demodulated signal is passed through an equalizer, a Trellis Decoder and Reed-Solomon Decoder to provide an appropriate filtered and level-adjusted digital signal that is coupled to the next processing stage.

摘要翻译： 通用调制解调器具有软件可配置的调制器/解调器，其适应与地面，电缆，电话线，卫星和无线通信相关联的不同调制格式，以通过单个设备发送和接收，其中调制解调器具有可重构逻辑以容纳 正在接收或发送信号的格式。 请注意，调制器或解调器可以单独使用，也可以将两个单元组合使用，用于收发器，同样的软件配置了调制器和解调器，也可以配置两个单元使用不同的软件。 在接收模式下，通用调制解调器检测输入信号的调制格式，并重新配置其软件可配置解调器的逻辑，以输出解调的数字数据进行进一步处理。 在发送模式中，通过将通用调制解调器中的软件可配置调制器设置为特定格式，向被发送的信息提供适当的调制格式。 在一个实施例中，在接收模式中，输入信号被AD转换，主机处理器用于检测与输入信号相关联的调制类型，并且通过配置控制器配置随机存取存储器，该存储器耦合到软件可配置解调器 。 在高级电视应用中，解调的信号通过均衡器，网格解码器和里德 - 索罗门解码器，以提供耦合到下一个处理级的适当的滤波和电平调整的数字信号。

公开(公告)号：US06859495B1

公开(公告)日：2005-02-22

申请号：US08741714

申请日：1996-10-31

申请人： Tommy C. Poon ,  Huifang Sun ,  Jay Bao ,  Anthony Vetro

发明人： Tommy C. Poon ,  Huifang Sun ,  Jay Bao ,  Anthony Vetro

IPC分类号： G06F17/14 ,  H04N7/01 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  H04N7/50 ,  H04N7/12

CPC分类号： G06F17/147 ,  H04N7/0125 ,  H04N19/126 ,  H04N19/159 ,  H04N19/16 ,  H04N19/172 ,  H04N19/176 ,  H04N19/40 ,  H04N19/44 ,  H04N19/51 ,  H04N19/523 ,  H04N19/547 ,  H04N19/577 ,  H04N19/59 ,  H04N19/61 ,  H04N19/86

摘要： A digital video format converter and method therefor includes a first and second converter. The first converter receives a digital video signal and converts, in the frequency domain, inter-coded pictures in the digital video signal into intra-coded pictures. The first converter performs motion compensation in the frequency domain on the inter-coded pictures in the digital video signal to convert the inter-coded pictures into intra-coded pictures. The second converter down converts output of the first converter. Further signal processing then completes placing the digital video signal output by the second converter in a format acceptable to standard lower definition digital decoders.

摘要翻译： 数字视频格式转换器及其方法包括第一和第二转换器。 第一转换器接收数字视频信号，并将频域中的数字视频信号中的帧间编码图像转换为帧内编码图像。 第一转换器在频域中对数字视频信号中的帧间编码图像执行运动补偿，以将帧间编码图像转换为帧内编码图像。 第二个转换器下转换第一个转换器的输出。 然后进一步的信号处理完成将由第二转换器输出的数字视频信号以标准低分辨率数字解码器可接受的格式放置。

公开(公告)号：US06526110B1

公开(公告)日：2003-02-25

申请号：US09395700

申请日：1999-09-14

申请人： Jay Bao ,  Tommy C. Poon

发明人： Jay Bao ,  Tommy C. Poon

IPC分类号： H04L2540

CPC分类号： G06T1/60 ,  H04L2027/0057

摘要： An apparatus receives and demodulates digital signals encoded in multiple formats. The apparatus includes multiple processor units and a memory embedded with the processor units, and a cache connected to each of the processor units. The cache for communicating between the plurality of processors. The embedded memory can include data and instruction memory. The processor units and memory are configured as a multi-mode receiver demodulator front-end capable of receiving digitally modulated signals in multiple formats, and demodulating the signals in real-time in response any one of the multiple formats.

摘要翻译： 一种装置接收和解调以多种格式编码的数字信号。 该装置包括多个处理器单元和嵌入有处理器单元的存储器，以及连接到每个处理器单元的高速缓存器。 用于在多个处理器之间进行通信的高速缓存。 嵌入式存储器可以包括数据和指令存储器。 处理器单元和存储器被配置为能够以多种格式接收数字调制信号的多模式接收机解调器前端，并且响应多种格式中的任何一种来实时地解调信号。

公开(公告)号：US06526093B1

公开(公告)日：2003-02-25

申请号：US09262377

申请日：1999-03-04

申请人： Jay Bao ,  Parthapratim De ,  Tommy C. Poon

发明人： Jay Bao ,  Parthapratim De ,  Tommy C. Poon

IPC分类号： H03H740

CPC分类号： H04L25/03057 ,  H04L25/03987 ,  H04L2025/03382 ,  H04L2025/0342 ,  H04L2025/0349 ,  H04L2025/03694

摘要： In a receiver, an adaptive decision feedback equalizer receives broadcast signals having multipath interference. The equalizer includes a feed-forward, a feedback, and a partial feedback forward filter. The equalizer also includes a slicer and two accumulators. An output from the slicer is processed by the feedback filter and the partial feedback filter. The output from the feedback filter is subtracted from output of the feed-forward filter to form the input to the slicer, and the output of the partial feedback filter is subtracted from the received signal to form the input for the feed-forward filter to reduce the multipath interference.

摘要翻译： 在接收机中，自适应判决反馈均衡器接收具有多路径干扰的广播信号。 均衡器包括前馈，反馈和部分反馈正向滤波器。 均衡器还包括一个切片器和两个累加器。 来自分片器的输出由反馈滤波器和部分反馈滤波器处理。 来自反馈滤波器的输出从前馈滤波器的输出中减去以形成到限幅器的输入，并且从接收信号中减去部分反馈滤波器的输出，以形成前馈滤波器的输入以减少 多路径干扰。

公开(公告)号：US06144698A

公开(公告)日：2000-11-07

申请号：US742124

申请日：1996-10-31

申请人： Tommy C. Poon ,  Huifang Sun ,  Jay Bao ,  Anthony Vetro

发明人： Tommy C. Poon ,  Huifang Sun ,  Jay Bao ,  Anthony Vetro

IPC分类号： H04N7/32 ,  H04N7/26 ,  H04N7/36 ,  H04N7/50 ,  H04N7/12

CPC分类号： H04N19/90 ,  H04N19/423 ,  H04N19/428 ,  H04N19/48 ,  H04N19/51 ,  H04N19/61

摘要： A digital video decoder and method therefor receives a digital video signal and performs motion compensation on the digital video signal in the frequency domain. The motion compensation is performed by forming, for each inter-coded picture in the digital video signal, a composite picture in the frequency domain representing a reference picture corresponding to the inter-coded picture, and then adding the composite picture to the corresponding inter-coded picture. Each macro block of the composite picture is formed based on corresponding macro blocks of at least one anchor picture stored in memory. The anchor pictures are stored as compressed bits via quantization and variable length coding of frequency domain blocks to reduce required memory capacity. The synthesis technique employed by the compositor to form the composite macro blocks accounts for both field and frame motion compensation with half-pel accuracy. The intra-coded pictures produced as a result of the motion compensation are then reformatted in a display order.

摘要翻译： 数字视频解码器及其方法接收数字视频信号并对频域中的数字视频信号执行运动补偿。 通过对数字视频信号中的每个帧间编码图像形成表示与帧间编码图像相对应的参考图像的频域中的合成图像，然后将合成图像相加到相应的帧间编码图像， 编码图片。 基于存储在存储器中的至少一个锚图像的相应宏块形成复合图像的每个宏块。 锚图像通过频域块的量化和可变长度编码被存储为压缩比特以减少所需的存储容量。 合成器用于形成复合宏块的综合技术考虑了半像素精度的场和帧运动补偿。 作为运动补偿的结果产生的帧内编码图像然后以显示顺序重新格式化。