公开(公告)号：US20110274177A1

公开(公告)日：2011-11-10

申请号：US13103578

申请日：2011-05-09

申请人： Sung-bum PARK ,  Jae-won YOON ,  Hae-young JUN ,  Shin-wook KANG ,  Dai-woong CHOI ,  Huai-rong SHAO

发明人： Sung-bum PARK ,  Jae-won YOON ,  Hae-young JUN ,  Shin-wook KANG ,  Dai-woong CHOI ,  Huai-rong SHAO

IPC分类号： H04N7/26

CPC分类号： H04N19/182 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/184 ,  H04N19/593 ,  H04N19/91

摘要： A method and apparatus for processing a video frame is provided. The method includes dividing the video frame into pixel blocks each including a reference pixel; calculating difference values between the reference pixel and pixels neighboring the reference pixel; converting the calculated difference values into values that belong to a bit depth range; and performing entropy coding by using the converted difference values as symbols.

摘要翻译： 提供了一种用于处理视频帧的方法和装置。 该方法包括将视频帧划分为每个包括参考像素的像素块; 计算参考像素和与参考像素相邻的像素之间的差值; 将计算的差值转换为属于比特深度范围的值; 以及通过使用转换的差值作为符号来执行熵编码。

公开(公告)号：US20110273622A1

公开(公告)日：2011-11-10

申请号：US13027509

申请日：2011-02-15

申请人： Chiu NGO ,  Huai-Rong SHAO ,  Ju-Lan HSU

发明人： Chiu NGO ,  Huai-Rong SHAO ,  Ju-Lan HSU

IPC分类号： H04N9/77

CPC分类号： H04N21/4363 ,  H04N21/6131

摘要： A method and system for transmission of video information is provided. A transmitting wireless station performs chroma partitioning of pixels in a video frame into different partitions. The chroma partitioning includes separating luminance (Y) information from chrominance information (CB and CR) of each pixel in a set of spatially correlated pixels. The luminance (Y) information are placed into different partitions. The different partitions into different packets and transmitted over a wireless communication medium to a receiving wireless station. The video information is selectively adapted to a lower data transmission rate with reduced quality degradation by dropping less important partitions.

摘要翻译： 提供了一种用于传输视频信息的方法和系统。 发送无线站将视频帧中的像素的色度分割执行到不同的分区。 色度分割包括从一组空间相关像素中的每个像素的色度信息（CB和CR）分离亮度（Y）信息。 亮度（Y）信息被放置在不同的分区中。 不同的分区分成不同的分组，并通过无线通信介质传送到接收无线台。 视频信息选择性地适应于较低的数据传输速率，通过降低重要的分区而降低质量下降。

公开(公告)号：US08023976B2

公开(公告)日：2011-09-20

申请号：US11800392

申请日：2007-05-03

申请人： Huai-Rong Shao ,  Chiu Ngo

发明人： Huai-Rong Shao ,  Chiu Ngo

IPC分类号： H04B15/00

CPC分类号： H04W56/0015 ,  H04W56/0065 ,  H04W92/10

摘要： A high accuracy clock synchronization mechanism between a sender and a receiver in a communication network achieves time synchronization using broadcast beacons, directly at the PHY/MAC layer of the sender and the receiver, to minimize synchronization delay jitter. This provides a more efficient synchronization method than either NTP or SNTP, because multiple handshaking information exchange is avoided. Further, using beacons avoids the overhead of introducing additional synchronization packets in higher layer synchronization.

摘要翻译： 通信网络中的发送器和接收器之间的高精度时钟同步机制使用广播信标直接在发送器和接收器的PHY / MAC层实现时间同步，以最小化同步延迟抖动。 这提供了比NTP或SNTP更有效的同步方法，因为避免了多次握手信息交换。 此外，使用信标避免了在更高层同步中引入附加同步分组的开销。

公开(公告)号：US20110070928A1

公开(公告)日：2011-03-24

申请号：US12885351

申请日：2010-09-17

申请人： Ju-Lan Hsu ,  Huai-Rong Shao ,  Chiu Ngo

发明人： Ju-Lan Hsu ,  Huai-Rong Shao ,  Chiu Ngo

IPC分类号： H04B1/38

CPC分类号： H04W52/0216 ,  Y02D70/1222 ,  Y02D70/142 ,  Y02D70/144

摘要： A method and system for wireless communication over a wireless communication medium is provided. A schedule is generated which indicates when a wireless communication station may enter a power saving state in an announcement time (AT) period, based on an idle timeout interval in the AT period. The AT period comprises a period after a beacon transmission in a beacon interval.

摘要翻译： 提供了一种通过无线通信介质进行无线通信的方法和系统。 生成表示基于AT周期的空闲超时间隔，在通知时间（AT）期间无线通信台可以进入省电状态的时间表。 AT周期包括在信标间隔中的信标传输之后的周期。

公开(公告)号：US20100110981A1

公开(公告)日：2010-05-06

申请号：US12541096

申请日：2009-08-13

申请人： Huai-Rong Shao ,  Chiu Ngo

发明人： Huai-Rong Shao ,  Chiu Ngo

IPC分类号： H04W40/00

CPC分类号： H04W72/046 ,  H04B7/0695 ,  H04W74/002 ,  H04W76/14

摘要： Method and system for directional wireless communication, is provided. One implementation involves directionally transmitting a request for access to a shared wireless communication medium, for directional communication between two wireless stations, and receiving a broadcast response indicating a time period during which the wireless stations may perform directional communication therebetween via the wireless communication medium by setting their antenna directions to each other.

摘要翻译： 提供了定向无线通信的方法和系统。 一个实施方案涉及定向发送对共享无线通信介质的访问请求，用于两个无线站之间的定向通信，并且接收指示无线站可以经由无线通信介质经由无线通信介质执行定向通信的时间段的广播响应， 他们的天线方向彼此。

公开(公告)号：US20100002627A1

公开(公告)日：2010-01-07

申请号：US12410091

申请日：2009-03-24

申请人： Chiu Ngo ,  Huai-Rong Shao

发明人： Chiu Ngo ,  Huai-Rong Shao

IPC分类号： H04W84/10

CPC分类号： H04W74/02 ,  H04W74/006

摘要： A system and method for use of a short beacon in a wireless communication network is disclosed. In one embodiment, the method comprises generating a short beacon comprising PHY information, wherein the short beacon excludes MAC information and transmitting the short beacon via the wireless network. In general, three types of short beacons are disclosed, a first type consisting only of a PHY preamble, a second type also including a PHY header, and a third type also including a MAC header. In addition, the scheme of common beacons and individual beacons is described. Common beacons are broadcast omni-directional at the beginning of each superframe with low data rate and individual beacons are unicast to individual devices directionally with high data rate. A common beacon contains information intended for all of the devices of the network. An individual beacon contains information intended for one particular device.

摘要翻译： 公开了一种在无线通信网络中使用短信标的系统和方法。 在一个实施例中，该方法包括生成包含PHY信息的短信标，其中短信标排除MAC信息并通过无线网络发送短信标。 通常，公开了三种类型的短信标，第一类型仅包括PHY前导码，第二类型也包括PHY报头，以及第三类型，还包括MAC报头。 另外，描述了常见的信标和个人信标的方案。 在每个具有低数据速率的超帧开始时，通用信标全向广播，并且单个信标以高数据速率方向地单播到各个设备。 公共信标包含针对网络的所有设备的信息。 单个信标包含用于一个特定设备的信息。

公开(公告)号：US20090238156A1

公开(公告)日：2009-09-24

申请号：US12362407

申请日：2009-01-29

申请人： Su Khiong Yong ,  Huai-Rong Shao ,  Xiangping Qin ,  Pengfei Xia ,  Chiu Ngo

发明人： Su Khiong Yong ,  Huai-Rong Shao ,  Xiangping Qin ,  Pengfei Xia ,  Chiu Ngo

IPC分类号： H04J3/00 ,  H04B7/00 ,  H04W4/00

CPC分类号： H04B7/0491 ,  H04B7/0695

摘要： A system and method of performing a beam discovery between a device and a plurality of other devices in a wireless network is disclosed. Sector training sequences to a plurality of other devices are transmitted via a transmit directional antenna having a set of transmit sectors. A plurality of feedback messages are received from the plurality of other devices, where the plurality of feedback messages are indicative of optimum transmit sectors that have been determined at the other devices based at least in part on the sector training sequences. Beam training sequences are transmitted to the plurality of other devices via the transmit directional antenna. A plurality of feedback message indicative of optimum transmit beam directions within the optimum transmit sectors are received from the plurality of other devices.

摘要翻译： 公开了一种在无线网络中的设备与多个其他设备之间执行波束发现的系统和方法。 通过具有一组发送扇区的发送定向天线来发送对多个其他设备的扇区训练序列。 从多个其他设备接收多个反馈消息，其中多个反馈消息至少部分地基于扇区训练序列来指示已经在其他设备处确定的最佳发射扇区。 波束训练序列经由发射定向天线发送到多个其它设备。 从多个其他设备接收指示最佳发射扇区内的最佳发射波束方向的多个反馈消息。

公开(公告)号：US20090003379A1

公开(公告)日：2009-01-01

申请号：US11769636

申请日：2007-06-27

申请人： Huai-Rong Shao ,  Chiu Ngo

发明人： Huai-Rong Shao ,  Chiu Ngo

IPC分类号： H04J3/16

CPC分类号： H04W56/0045 ,  H04N21/4122 ,  H04N21/4305 ,  H04N21/43637 ,  H04W56/0055

摘要： A system and method for wireless communication of uncompressed media data having media data packet synchronization are disclosed. One embodiment of the system includes a source configured to transmit media data packets such that they propagate over a wireless channel and at least one sink configured to receive the media data packets over the wireless channel from the source. The media data packets are spaced apart from one another by at least one interleaved time. The system is configured to detect propagation of the media data packets, and to determine propagation delays of the media data packets. The source is further configured to determine a jitter between the media data packets based on the determined propagation delays. The source is further configured to adjust the transmission of the media data packets in response to the determination of the jitter.

摘要翻译： 公开了一种用于具有媒体数据分组同步的未压缩媒体数据的无线通信的系统和方法。 该系统的一个实施例包括被配置为传送媒体数据分组的源，使得它们在无线信道上传播，并且至少一个宿被配置成通过无线信道从源接收媒体数据分组。 媒体数据分组彼此间隔开至少一个交织时间。 该系统被配置为检测媒体数据分组的传播，并确定媒体数据分组的传播延迟。 源还被配置为基于所确定的传播延迟来确定媒体数据分组之间的抖动。 源还被配置为响应于抖动的确定来调整媒体数据分组的传输。

公开(公告)号：US20080273521A1

公开(公告)日：2008-11-06

申请号：US11800392

申请日：2007-05-03

申请人： Huai-Rong Shao ,  Chiu Ngo

发明人： Huai-Rong Shao ,  Chiu Ngo

IPC分类号： H04J3/06

CPC分类号： H04W56/0015 ,  H04W56/0065 ,  H04W92/10

摘要： A high accuracy clock synchronization mechanism between a sender and a receiver in a communication network achieves time synchronization using broadcast beacons, directly at the PHY/MAC layer of the sender and the receiver, to minimize synchronization delay jitter. This provides a more efficient synchronization method than either NTP or SNTP, because multiple handshaking information exchange is avoided. Further, using beacons avoids the overhead of introducing additional synchronization packets in higher layer synchronization.

摘要翻译： 通信网络中的发送器和接收器之间的高精度时钟同步机制使用广播信标直接在发送器和接收器的PHY / MAC层实现时间同步，以最小化同步延迟抖动。 这提供了比NTP或SNTP更有效的同步方法，因为避免了多次握手信息交换。 此外，使用信标避免了在更高层同步中引入附加同步分组的开销。

公开(公告)号：US07409022B2

公开(公告)日：2008-08-05

申请号：US10956302

申请日：2004-10-01

申请人： Hui Dai ,  Huai-Rong Shao

发明人： Hui Dai ,  Huai-Rong Shao

IPC分类号： H04L7/00

CPC分类号： H04J3/0667 ,  H04J3/0673 ,  H04J3/0697

摘要： A method synchronizes a transmit clock of a transmitter with a receive clock of a receiver in a wireless communications network. Times t1, t2, t3, and t4 of the transmit clock corresponding times t1′, t2′, t3′, and t4′ of the receive clock. A synchronization message is generated in a media access control layer of the transmitter at the time t1. The time t1 is inserted in the synchronization message when the synchronization message is passed from the media access layer to a physical layer at the time t2. Then, the synchronization message including the time t1 is broadcast. The synchronization message is received from the physical layer in the receiver, at which time the time t3′ is obtained. The received message is passed to a media access control layer of the receiver, and the receive clock is adjusted by adding the time t1′−t3′ to the current time of the receive clock.

摘要翻译： 一种方法将发射机的发射时钟与无线通信网络中接收机的接收时钟同步。 接收时钟的发送时钟对应时间t 1'，t 2'，t 3'和t 4'的时间t 1，t 2，t 3和t 4。 在时间t 1，在发射机的媒体访问控制层中产生同步消息。 当同步消息在时间t 2从媒体接入层传送到物理层时，时间t 1被插入到同步消息中。 然后，包括时间t 1的同步消息被广播。 从接收机的物理层接收同步消息，此时获得时间t 3'。 接收到的消息被传递给接收机的媒体接入控制层，并且通过将时间t 1'-t 3'加到接收时钟的当前时间来调整接收时钟。