公开(公告)号：US20080159208A1

公开(公告)日：2008-07-03

申请号：US11617018

申请日：2006-12-28

申请人： Kevin L. Kloker ,  Gregory J. Buchwald ,  Lawrence M. Ecklund ,  Stephen L. Kuffner ,  Stephen N. Levine ,  S. David Silk

发明人： Kevin L. Kloker ,  Gregory J. Buchwald ,  Lawrence M. Ecklund ,  Stephen L. Kuffner ,  Stephen N. Levine ,  S. David Silk

IPC分类号： H04Q7/00

CPC分类号： H04W16/14 ,  H04W48/12

摘要： A method and apparatus for allocation of shared spectrum in a wireless communication system uses a radio frequency (RF) beacon signal that is transmitted between access points of the wireless communication system. The information content of the RF beacon signal includes an identifier of the access point that generated the signal, identifiers of clients of that access point; and identifiers of the communication channels assigned to those clients. The client identifier may include at least part of an Internet Protocol (IP) address of the client. Additionally the beacon signal may contain client attributes to enable negotiation of the sharing of available communication channels between access points and clients.

摘要翻译： 用于在无线通信系统中分配共享频谱的方法和装置使用在无线通信系统的接入点之间传输的射频（RF）信标信号。 RF信标信号的信息内容包括产生该信号的接入点的标识符，该接入点的客户端的标识符; 以及分配给这些客户端的通信信道的标识符。 客户端标识符可以包括客户端的因特网协议（IP）地址的至少一部分。 另外，信标信号可以包含客户端属性，以便能够在接入点和客户端之间共享可用的通信信道。

公开(公告)号：US5764921A

公开(公告)日：1998-06-09

申请号：US548776

申请日：1995-10-26

申请人： Mark R. Banham ,  James C. Brailean ,  Stephen N. Levine ,  Aggelos K. Katsaggelos ,  Guido M. Schuster

发明人： Mark R. Banham ,  James C. Brailean ,  Stephen N. Levine ,  Aggelos K. Katsaggelos ,  Guido M. Schuster

IPC分类号： G06T9/00 ,  H04N1/417

CPC分类号： G06T9/00

摘要： A method (100, 200), device (300) and microprocessor (400) are provided for selectively compressing video frames of a motion compensated prediction-based video codec based on a predetermined set of compression techniques. An energy estimate of the current displaced frame difference, DFD, is used to compute a ratio between the estimate and a historical mean of energy estimates. The ratio is iteratively compared to a predetermined set of thresholds which are associated with the predetermined set of compression techniques. The comparisons are used to choose a technique based on the thresholds, and a technique is selected to be used for encoding the current DFD.

摘要翻译： 提供了一种方法（100,200），装置（300）和微处理器（400），用于基于预定的一组压缩技术选择性地压缩基于运动补偿预测的视频编解码器的视频帧。 目前的移位帧差的能量估计DFD用于计算估计值与能量估计的历史平均值之间的比值。 该比率被迭代地与与预定的压缩技术集合相关联的预定阈值集进行比较。 比较用于选择基于阈值的技术，并且选择用于编码当前DFD的技术。

公开(公告)号：US5619341A

公开(公告)日：1997-04-08

申请号：US392583

申请日：1995-02-23

申请人： Cheung Auyeung ,  Brett L. Lindsley ,  Stephen N. Levine

发明人： Cheung Auyeung ,  Brett L. Lindsley ,  Stephen N. Levine

IPC分类号： H04N7/32 ,  H04N7/50 ,  H04N21/234 ,  H04N21/44 ,  H04N1/00

CPC分类号： H04N21/44004 ,  H04N19/115 ,  H04N19/14 ,  H04N19/172 ,  H04N19/61 ,  H04N21/23406 ,  H04N19/146 ,  H04N19/152 ,  H04N19/50

摘要： The present invention is method and apparatus for preventing overflow and underflow of an encoder buffer in a video compression system. A virtual buffer is created in a rate controller to model the decoder buffer fullness (102). A sequence of bits is generated by an encoder (104). The encoder is controlled by the rate controller to prevent a decoder buffer underflow and overflow. Then, the sequence of bits is received by the encoder buffer to produce a bitstream (106). The bitstream corresponds to an instantaneous channel bitrate. The bitstream is transmitted from the encoder buffer to a decoder buffer following a delay (108). The delay is controlled by a rate controller to synchronize an encoder buffer fullness with a virtual buffer fullness (110). The synchronization prevents overflow and underflow of the encoder buffer.

摘要翻译： 本发明是用于防止视频压缩系统中的编码器缓冲器的上溢和下溢的方法和装置。 在速率控制器中创建虚拟缓冲区以对解码器缓冲区丰满度进行建模（102）。 比特序列由编码器（104）产生。 编码器由速率控制器控制，以防止解码器缓冲器下溢和溢出。 然后，编码器缓冲器接收比特序列以产生比特流（106）。 比特流对应于瞬时信道比特率。 在延迟（108）之后，比特流从编码器缓冲器发送到解码器缓冲器。 延迟由速率控制器控制，以使编码器缓冲器充满度与虚拟缓冲器充满度（110）同步。 同步可防止编码器缓冲区的溢出和下溢。

公开(公告)号：US4876740A

公开(公告)日：1989-10-24

申请号：US310013

申请日：1989-02-13

申请人： Stephen N. Levine ,  Albert J. Leitich

发明人： Stephen N. Levine ,  Albert J. Leitich

IPC分类号： H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04L7/10

CPC分类号： H04B7/2643 ,  H04J3/0605 ,  H04L7/041 ,  H04L7/042 ,  H04L7/046 ,  H04L7/10

摘要： A cellular radiotelephone system is disclosed in which the signalling protocol for the system is embedded in the frame synchronization of the digital messages transmitted on the system. Multiple functions are accomplished by the synchronization signal and include call supervision, mode definition, and data frame synchronization. The synchronization signal is a high auto correlation, low cross correlation sequence of a predetermined number of data bits. Different bit sequences may be employed as a synchronization signal while conveying call supervision information defining the serving fixed site. Additionally, the logical inverse of the synchronizing signal may be utilized interchangably with the synchronizing signal to define the fixed site. A repetitive pattern of synchronizing signals and logical inverse synchronizing signals convey system mode information without increasing signalling overhead or losing the correlation performance of the full synchronization word.

摘要翻译： 公开了一种蜂窝无线电话系统，其中系统的信令协议嵌入在系统上传输的数字消息的帧同步中。 多功能由同步信号完成，包括呼叫监控，模式定义和数据帧同步。 同步信号是预定数量的数据位的高自相关，低互相关序列。 不同的比特序列可以用作同步信号，同时传送定义服务固定站点的呼叫监督信息。 另外，同步信号的逻辑反相可以与同步信号互换使用，以定义固定位置。 同步信号和逻辑反相同步信号的重复模式传达系统模式信息而不增加信令开销或丢失完全同步字的相关性能。

公开(公告)号：US20080159207A1

公开(公告)日：2008-07-03

申请号：US11617011

申请日：2006-12-28

申请人： Stephen N. Levine ,  Lawrence M. Ecklund ,  Stephen L. Kuffner

发明人： Stephen N. Levine ,  Lawrence M. Ecklund ,  Stephen L. Kuffner

IPC分类号： H04Q7/00 ,  H04Q7/24

CPC分类号： H04W16/14 ,  H04W84/12

摘要： A node of a wireless mesh network assigns a radio frequency (RF) channel for operation by sensing an interference level in a number of RF channels, determining which RF channels are available for use and selecting the available RF channel having the best performance. The node then attempts to communicate with neighboring nodes of the wireless mesh network using the selected RF channel. If communication with a sufficient number of nodes is not achieved, the node selects an available RF channel having the next best performance, and attempts to communicate with neighboring nodes using the selected RF channel. The process is repeated until the node can communicate with a sufficient number of nodes. The selected RF channel is then assigned for node operation.

摘要翻译： 无线网状网络的节点通过感测多个RF信道中的干扰电平来分配用于操作的射频（RF）信道，确定哪些RF信道可用于使用并选择具有最佳性能的可用RF信道。 然后，节点尝试使用所选择的RF信道与无线网状网络的相邻节点进行通信。 如果没有实现与足够数量的节点的通信，则节点选择具有下一个最佳性能的可用RF信道，并且尝试使用所选择的RF信道与相邻节点进行通信。 该过程被重复，直到节点能够与足够数量的节点通信。 然后将所选择的RF信道分配给节点操作。

公开(公告)号：US20080120264A1

公开(公告)日：2008-05-22

申请号：US11561491

申请日：2006-11-20

申请人： Whay Chiou Lee ,  Charbel Khawand ,  Kevin L. Kloker ,  Stephen N. Levine

发明人： Whay Chiou Lee ,  Charbel Khawand ,  Kevin L. Kloker ,  Stephen N. Levine

IPC分类号： G06F17/00

CPC分类号： H04L41/0893 ,  H04W16/14 ,  H04W28/18

摘要： A method and apparatus for efficient management of hierarchically administered spectrum resources in a communications network are disclosed. The method may include receiving a request for a policy decision from a policy enforcement point at a current policy decision point level in a hierarchy of policy decision points, determining whether the request can be satisfied at the current policy decision point level, wherein if the request cannot be satisfied at the current policy decision point level, forwarding the request to a policy decision point at a policy decision point level that is higher in the hierarchy, otherwise retrieving policy information from a policy database, determining a policy decision, wherein if the request was received from the policy enforcement point at the current policy decision point hierarchy level, sending the policy decision to the policy enforcement point at the current policy decision point level in the hierarchy, otherwise, sending the policy decision to a policy decision point level lower in the hierarchy.

摘要翻译： 公开了一种用于在通信网络中有效管理分层管理的频谱资源的方法和装置。 该方法可以包括在策略决策点的层次结构中从策略执行点接收当前策略决策点级别的策略决定请求，确定在当前策略决策点级别是否可以满足请求，其中如果请求 在当前的策略决策点级别不能满足，将请求转发到在层次结构中较高的策略决策点级别的策略决策点，否则从策略数据库中检索策略信息，确定策略决定，其中如果请求 在当前政策决策点层次结构层面从政策执行点收到，将政策决定发送到层次结构当前政策决策点层面的政策执行点，否则将政策决策发送到低于 层次结构。

公开(公告)号：US5724369A

公开(公告)日：1998-03-03

申请号：US548772

申请日：1995-10-26

申请人： James C. Brailean ,  Kevin J. O'Connell ,  Mark R. Banham ,  Stephen N. Levine

发明人： James C. Brailean ,  Kevin J. O'Connell ,  Mark R. Banham ,  Stephen N. Levine

IPC分类号： H04N19/895 ,  H04L1/00

CPC分类号： H04N19/507 ,  H04N19/51 ,  H04N19/895

摘要： The present invention provides a method (100, 200) and a device (300, 400, 600) for containing and concealing errors which occur in a transmitted video bitstream. Utilizing a plurality of predetermined scanning patterns, particular macroblocks are chosen per frame to have their intensity information encoded and transmitted. This approach provides an efficient method to limit the degradation to the visual quality of a video sequence decoded from a bitstream corrupted by an extended error burst. Concealment of areas within a video sequence that are affected by short error bursts and/or random errors is achieved by estimating the corresponding lost macroblock information from the remaining uncorrupted macroblocks. That is, for each lost macroblock a prediction of the intensity information is generated through the use of a motion vector from a neighboring uncorrupted macroblock.

摘要翻译： 本发明提供了一种用于包含和隐藏在发送的视频比特流中出现的错误的方法（100,200）和装置（300,400,600）。 利用多个预定的扫描模式，每帧选择特定的宏块以使其强度信息被编码和发送。 这种方法提供了一种有效的方法来将劣化限制为从由扩展错误突发所破坏的比特流解码的视频序列的视觉质量。 通过从剩余的未破坏的宏块中估计相应的丢失的宏块信息来实现视频序列内由短错误突发和/或随机错误影响的区域的隐藏。 也就是说，对于每个丢失的宏块，通过使用来自相邻未破坏的宏块的运动矢量来生成强度信息的预测。

公开(公告)号：US5646867A

公开(公告)日：1997-07-08

申请号：US506147

申请日：1995-07-24

申请人： Taner Ozcelik ,  James C. Brailean ,  Aggelos K. Katsaggelos ,  Stephen N. Levine

发明人： Taner Ozcelik ,  James C. Brailean ,  Aggelos K. Katsaggelos ,  Stephen N. Levine

IPC分类号： H04N7/26 ,  H04N7/36 ,  G06F17/00

CPC分类号： H04N19/537 ,  H04N19/503 ,  H04N19/20

摘要： The present invention provides a method (600) and system (100) for predicting a differential vector field. The method and system enable the detection and encoding of an area where motion compensating the past image frame to the current image frame, fails. Based on the DFD signal, the present invention detects regions where the motion compensation has failed (102). The boundaries of these regions are encoded and sent to the decoder (104). The intensity values contained in this region, by the current intensity frame, are also encoded and sent to the decoder. Based on the decoded region boundaries, the decoder decodes the intensity values and places them into the correct regions.

公开(公告)号：US5537155A

公开(公告)日：1996-07-16

申请号：US236753

申请日：1994-04-29

申请人： Kevin J. O'Connell ,  Cheung Auyeung ,  Stephen N. Levine

发明人： Kevin J. O'Connell ,  Cheung Auyeung ,  Stephen N. Levine

IPC分类号： H04N7/32 ,  G06T7/20 ,  H03M7/36 ,  H04N5/14 ,  H04N7/26

CPC分类号： G06T7/2026 ,  H04N19/523 ,  H04N19/53 ,  H04N19/533 ,  H04N5/145 ,  G06T2207/10016

摘要： Efficient and adaptable motion estimation between flames in a video sequence is achieved in a video compression system 100 by first performing a series of comparisons in a first region between a present video block of a present video frame and a comparison video block of a previously stored video frame based on a first search point displacement pattern 500. Then, similar comparisons are performed in a second and third region based on a second and third search point displacement pattern respectively 501, 502. A best match video block is determined as a result of the series of comparisons 503. The series of comparisons may be made for a predetermined number of video blocks 600 and video statistics may be collected for the comparisons 601. If the video statistics are unfavorable 602 or if a predetermined time has expired 603, then the region used for searching for a best match block may be changed.

摘要翻译： 通过首先在当前视频帧的当前视频块和先前存储的视频的比较视频块之间的第一区域中执行一系列比较来在视频压缩系统100中实现视频序列中火焰之间的有效和适应性运动估计 基于第一搜索点位移模式500.然后，分别基于第二和第三搜索点位移模式501,502在第二和第三区域中执行类似的比较。作为结果，确定最佳匹配视频块 一系列比较可以针对预定数量的视频块600进行比较，并且可以针对比较601收集视频统计信息。如果视频统计信息不利602或者如果预定时间已经到期603，则区域 用于搜索最佳匹配块的信息可能会被更改。

公开(公告)号：US5506686A

公开(公告)日：1996-04-09

申请号：US344251

申请日：1994-11-23

申请人： Cheung Auyeung ,  Stephen N. Levine ,  James J. Kosmach

发明人： Cheung Auyeung ,  Stephen N. Levine ,  James J. Kosmach

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/50 ,  H04N1/417 ,  H04N7/12

CPC分类号： H04N19/61 ,  H04N19/115 ,  H04N19/147 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15

摘要： The present invention provides a method (100) and device (200) for allocating bits to video pictures in a video compression system. A sequence of video frames or pictures is received, and the number of bits used to compress a previously encoded frame and a signal-to-noise ratio for the immediately previously encoded video frame are determined. Rate distortion model parameters are updated. Then, first, second, and third deviations are determined. Finally, the bit allocation for the frame is determined based on the first number of bits used to compress a previously encoded frame, the first deviation, the second deviation, and the third deviation.

摘要翻译： 本发明提供了一种用于在视频压缩系统中将比特分配给视频图像的方法（100）和装置（200）。 接收视频帧或图像的序列，并且确定用于压缩先前编码的帧的比特数和用于紧接在先编码的视频帧的信噪比。 速率失真模型参数更新。 然后，确定第一，第二和第三偏差。 最后，基于用于压缩先前编码的帧的第一比特数，第一偏差，第二偏差和第三偏差来确定帧的比特分配。