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1.发明授权Method and device for error control of a macroblock-based video compression technique 失效基于宏块视频压缩技术的误差控制方法和装置
公开(公告)号：US5778191A
公开(公告)日：1998-07-07
申请号：US548385
申请日：1995-10-26
摘要： The present invention provides a method (200) and device (300) for error control of a video compressed sequence in which error protection for both random and burst channel errors is provided. The error control syntax (100) applies a fixed length packet synchronization system to variable length coded compressed video data, which provides the capability to limit error propagation within the decoded video bit stream. The fixed length packet control information provides information to decode compressed video data in both forward and reverse directions to allow for the recovery of correctly decoded video data within a decoded frame after long bursts of channel errors while reducing the overhead for error control. The error control method also provides video error detection which may be used for error concealment.
摘要翻译： 本发明提供一种视频压缩序列的误差控制的方法（200）和装置（300），其中提供了随机和突发信道错误的错误保护。 错误控制语法（100）将固定长度分组同步系统应用于可变长度编码压缩视频数据，其提供限制解码视频比特流内的错误传播的能力。 固定长度分组控制信息提供用于在前向和反向两个方向解码压缩视频数据的信息，以允许在长时间的信道错误突发之后在解码帧内恢复正确解码的视频数据，同时减少错误控制的开销。 错误控制方法还提供可用于错误隐藏的视频错误检测。
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2.发明授权Method, device and microprocessor for selectively compressing video frames of a motion compensated prediction-based video codec 失效用于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的方法，装置和微处理器
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
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。
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3.发明授权Method and device for concealment and containment of errors in a macroblock-based video codec 失效用于隐藏和容纳基于宏块的视频编解码器中的错误的方法和装置
公开(公告)号：US5724369A
公开(公告)日：1998-03-03
申请号：US548772
申请日：1995-10-26
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。
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4.发明授权Video bitstream error resilient transcoder, method, video-phone, video-communicator and device 失效视频比特率错误弹性代码转换器，方法，视频电话，视频通信器和设备公开(公告)号：US06498809B1
公开(公告)日：2002-12-24
申请号：US09009149
申请日：1998-01-20
IPC分类号： H04N712
CPC分类号： H04N19/00 , H04N19/70 , H04N19/895
摘要： A video bitstrean error resilient transcoder (100), method (300), video-phone, and video-communicator are provided wherein error resilience is implemented by verifying a syntax of a video bitstream and replacing the video bitstream between resynchronization markers with a valid syntax that is used by a decoder to produce a video sequence.
摘要翻译： 提供了视频bitstrean错误弹性代码转换器（100），方法（300），视频电话和视频通信器，其中通过验证视频比特流的语法并且用有效语法替换重新同步标记之间的视频比特流来实现错误弹性 这被解码器用于产生视频序列。
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公开(公告)号：US5646867A
公开(公告)日：1997-07-08
申请号：US506147
申请日：1995-07-24
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.
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公开(公告)号：US4434323A
公开(公告)日：1984-02-28
申请号：US278251
申请日：1981-06-29
IPC分类号： H04K1/00
CPC分类号： H04K1/00
摘要： A method for synchronizing the scrambling sequences of communicating scrambler units of a privacy communications system in a reliable and secure manner. The method is particularly adapted for use in noisy or fade prone transmission environments, and permits late entry of authorized third parties to the system. The method utilizes digital sequences interleaved periodically with scrambled analog information to provide reliable synchronization.
摘要翻译： 一种用于以可靠和安全的方式同步隐私通信系统的通信扰乱单元的加扰序列的方法。 该方法特别适用于嘈杂或易褪色的传输环境，并允许授权的第三方将其延迟进入系统。 该方法利用与加扰的模拟信息周期性交织的数字序列，以提供可靠的同步。
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7.发明申请METHOD AND APPARATUS FOR ALLOCATION OF SHARED SPECTRUM IN A WIRELESS COMMUNICATION SYSTEM 审中-公开在无线通信系统中分配共享频谱的方法和装置公开(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
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。
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8.发明授权Method and apparatus for preventing overflow and underflow of an encoder buffer in a video compression system 失效用于防止视频压缩系统中的编码器缓冲器的溢出和下溢的方法和装置
公开(公告)号：US5619341A
公开(公告)日：1997-04-08
申请号：US392583
申请日：1995-02-23
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。
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公开(公告)号：US4876740A
公开(公告)日：1989-10-24
申请号：US310013
申请日：1989-02-13
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。
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公开(公告)号：US5276911A
公开(公告)日：1994-01-04
申请号：US608414
申请日：1990-11-02
摘要： In a cellular radiotelephone communication system, there is provided a method and apparatus for reducing contention between a plurality of mobile units requesting system resources comprising the steps of A) receiving access requests from at least one of the plurality of mobile units, B) determining the number of attempted access requests (access request count); and C) altering system resources as a function of the access request count in order to reduce the likelihood of contending mobile units. An alternative embodiment suggests deriving timing advance information as well as access request count, correlating the access request count to the timing advance information, and altering system resources as a function of the correlation in order to reduce the likelihood of contention. Yet another embodiment suggests that the mobile unit take independent action, based upon its access request count, in order to reduce the likelihood of contention.
摘要翻译： 在蜂窝无线电话通信系统中，提供了一种用于减少请求系统资源的多个移动单元之间的争用的方法和装置，包括以下步骤：A）从所述多个移动单元中的至少一个移动单元接收访问请求，B） 尝试访问请求数（访问请求计数）; 和C）根据访问请求计数改变系统资源，以减少竞争移动单元的可能性。 一个替代实施例建议导出定时提前信息以及访问请求计数，将访问请求计数与定时提前信息相关联，并且根据相关性改变系统资源，以便减少争用的可能性。 另一个实施例表明，为了减少争用的可能性，移动单元基于其访问请求计数来采取独立的动作。
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