专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4278996A Technique for encoding pictorial information 失效
标题翻译：编码图形信息的技术
公开(公告)号：US4278996A
公开(公告)日：1981-07-14
申请号：US139584
申请日：1980-04-11
申请人： Arun N. Netravali , John D. Robbins , John A. Stuller
发明人： Arun N. Netravali , John D. Robbins , John A. Stuller
IPC分类号： G06T9/00 , H04N7/26 , H04N7/32 , H04N7/36 , H04N7/12
CPC分类号： H04N19/152 , H04N19/503 , H04N19/51 , H04N19/50
摘要： Pictorial information is encoded using an interframe prediction technique which accounts for spatial and/or temporal changes in illumination. In one embodiment (FIG. 3), the intensity value of each element of a picture is predicted using the intensity of the corresponding element in a previous frame and a recursively updated gain factor .rho. which can account for both illumination changes as well as object movement. The prediction error and pel location is encoded only if the error exceeds a predetermined threshold. In a second embodiment (FIG. 3), additional predictions are made using displacement compensated prediction alone and in combination with gain adjustment. The best predictor is selected and the corresponding prediction error transmitted only if it is large.
摘要翻译：使用帧间预测技术对图形信息进行编码，该技术考虑了照明的空间和/或时间变化。在一个实施例（图3）中，使用先前帧中的相应元素的强度和递归更新的增益因子rho来预测图像的每个元素的强度值，该增益因子rho可以解释照明变化以及对象移动。预测误差和像素位置仅在误差超过预定阈值时被编码。在第二实施例（图3）中，仅使用位移补偿预测并结合增益调整来进行附加预测。选择最佳预测因子，只有在大的时候才发送相应的预测误差。

2. 发明授权

US4232338A Method and apparatus for video signal encoding with motion compensation 失效
标题翻译：具有运动补偿的视频信号编码方法和装置
公开(公告)号：US4232338A
公开(公告)日：1980-11-04
申请号：US046953
申请日：1979-06-08
申请人： Arun N. Netravali , John D. Robbins
发明人： Arun N. Netravali , John D. Robbins
IPC分类号： G06T9/00 , H04N7/26 , H04N7/32 , H04N7/12
CPC分类号： H04N19/51 , H04N19/93
摘要： Method and apparatus for encoding a video signal wherein the prediction errors for previously encoded pels are evaluated using motion compensation and frame difference predictions. Each present pel intensity value is then predicted using the technique which produced the smaller prediction error sum. Prediction errors for the present pel are encoded, together with address information, if the error exceeds a threshold value. The motion compensated prediction utilizes a displacement estimate which is recursively updated. A decoder is also described.
摘要翻译：用于编码视频信号的方法和装置，其中使用运动补偿和帧差预测来评估先前编码的像素的预测误差。然后使用产生较小预测误差和的技术来预测每个当前像素强度值。如果误差超过阈值，则将与当前像素一起的预测误差与地址信息一起编码。运动补偿预测利用递归更新的位移估计。还描述了解码器。

3. 发明授权

US4218704A Method and apparatus for video signal encoding with motion compensation 失效
标题翻译：具有运动补偿的视频信号编码方法和装置
公开(公告)号：US4218704A
公开(公告)日：1980-08-19
申请号：US21071
申请日：1979-03-16
申请人： Arun N. Netravali , John D. Robbins
发明人： Arun N. Netravali , John D. Robbins
IPC分类号： H04N7/12 , H04N7/36
CPC分类号： H04N19/51
摘要： A motion compensated video encoder includes apparatus (100) for recursively updating an estimate of displacement in the moving area of a picture, and for predicting the intensity values of elements of the picture using the displacement estimate. Address information is encoded for background (non-moving) elements and for moving elements for which the motion compensated prediction errors are satisfactorily small. For uncompensable pels, where the error exceeds a threshold, both address information and error values are encoded. The displacement estimate can also be encoded, if desired.
摘要翻译：运动补偿视频编码器包括用于递归地更新图像的移动区域中的位移的估计，并且使用位移估计来预测图像的元素的强度值的装置（100）。地址信息被编码用于背景（非移动）单元和用于运动补偿预测误差令人满意地较小的移动单元。对于错误超过阈值的无补偿像素，地址信息和错误值均被编码。如果需要，位移估计也可以被编码。

4. 发明授权

US4218703A Technique for estimation of displacement and/or velocity of objects in video scenes 失效
标题翻译：用于估计视频场景中物体的位移和/或速度的技术
公开(公告)号：US4218703A
公开(公告)日：1980-08-19
申请号：US21063
申请日：1979-03-16
申请人： Arun N. Netravali , John D. Robbins
发明人： Arun N. Netravali , John D. Robbins
IPC分类号： H04N7/18 , G01S11/12 , H04N7/26 , H04N7/12
CPC分类号： G01S11/12 , H04N19/51
摘要： A technique for estimation of displacement and/or velocity of objects in television scenes is recursive, in that each displacement calculation is made using the results of the previous calculation. In a first embodiment, a displaced frame difference DFD (i.e., the intensity difference between a spatial location in the present video frame and a location in the previous frame displaced from that location by an initial displacement estimate) is updated using the initial value of DFD normalized by a measure of local picture activity. In a second embodiment, the update is a multiplicative function of DFD and the intensity gradient at the displaced location in the previous frame.
摘要翻译：用于估计电视场景中物体的位移和/或速度的技术是递归的，因为使用先前计算的结果进行每个位移计算。在第一实施例中，使用DFD的初始值来更新移位的帧差DFD（即，当前视频帧中的空间位置与从该位置偏移初始位移估计的前一帧中的位置之间的强度差）通过测量当地图片活动进行归一化。在第二实施例中，更新是DFD的乘法函数和前一帧中位移位置处的强度梯度。

5. 发明授权

US4383272A Video signal interpolation using motion estimation 失效
标题翻译：使用运动估计的视频信号插值
公开(公告)号：US4383272A
公开(公告)日：1983-05-10
申请号：US253698
申请日：1981-04-13
申请人： Arun N. Netravali , John D. Robbins
发明人： Arun N. Netravali , John D. Robbins
IPC分类号： H04N7/46 , H04N7/12
CPC分类号： H04N19/577
摘要： Information defining elements of a picture is estimated by interpolation using information from related locations in preceding and succeeding versions of the picture. The related locations are determined by forming an estimate of the displacement of objects in the picture. Displacement estimates are advantageously formed recursively, with updates being formed only in moving areas of the picture. If desired, an adaptive technique can be used to permit motion compensated interpolation or fixed position interpolation, depending upon which produces better results.
摘要翻译：通过使用来自图像的先前和后续版本中的相关位置的信息进行插值来估计图像的定义要素的信息。通过形成图像中物体的位移的估计来确定相关位置。位移估计有利地被递归地形成，只是在图像的移动区域中形成更新。如果需要，可以使用自适应技术来允许运动补偿内插或固定位置插值，这取决于哪些产生更好的结果。

6. 发明授权

US07966385B2 Methods and apparatus for virtual network configuration 有权
标题翻译：用于虚拟网络配置的方法和设备
公开(公告)号：US07966385B2
公开(公告)日：2011-06-21
申请号：US10449998
申请日：2003-05-30
申请人： Arun N. Netravali , Edward Stanley Szurkowski
发明人： Arun N. Netravali , Edward Stanley Szurkowski
IPC分类号： G06F15/177 , G06F15/16
CPC分类号： H04L12/4641 , H04L41/0803
摘要： A virtual network is configured in a communication system in such a manner that the virtual network is not required to have associated therewith any particular physical home location, or more generally any dedicated arrangement of physical network infrastructure elements. The communication system includes a communication network, such as a wireless network or the Internet, connectable to one or more user communication elements. Information is received from a given one of the communication elements indicating association of the given communication element with a particular virtual network, and responsive to the received information the virtual network is configured to include the given communication element. The virtual network may be comprised entirely of remote users. Emulated data network and voice network functionality may be provided to those users without requiring their corresponding entity to have a physical home location for data network and voice network elements, or any particular dedicated arrangement of such physical network infrastructure elements.
摘要翻译：在通信系统中配置虚拟网络，使得虚拟网络不需要与任何特定物理归属位置相关联，或者更一般地，物理网络基础设施元件的任何专用布置。通信系统包括可连接到一个或多个用户通信元件的通信网络，诸如无线网络或因特网。从指定给定通信元件与特定虚拟网络的关联的给定的一个通信元件接收信息，并且响应于所接收的信息，虚拟网络被配置为包括给定的通信元件。虚拟网络可以完全由远程用户组成。可以向这些用户提供仿真的数据网络和语音网络功能，而不需要其对应的实体具有用于数据网络和语音网络元件的物理归属位置，或者这些物理网络基础设施元件的任何特定的专用布置。

7. 发明申请

US20080273458A1 METHOD AND APPARATUS FOR MULTICAST SCHEDULING IN WIRELESS NETWORKS 有权
标题翻译：无线网络中多播调度的方法与装置
公开(公告)号：US20080273458A1
公开(公告)日：2008-11-06
申请号：US11744531
申请日：2007-05-04
申请人： Katherine H. Guo , Arun N. Netravali , Krishan K. Sabnani
发明人： Katherine H. Guo , Arun N. Netravali , Krishan K. Sabnani
IPC分类号： G08C15/00
CPC分类号： H04W72/1257 , H04L47/10 , H04L47/70 , H04L47/806 , H04L47/824 , H04W28/22 , H04W72/005 , H04W84/042
摘要： The invention includes a method and apparatus for scheduling multicast transmissions in a wireless network by selecting one of a plurality of multicast groups of a cellular region that is permitted to transmit information during a current timeslot. A method includes receiving data rate request values from wireless user terminals of each of a plurality of multicast groups, assigning a data rate to each multicast group using the data rate request values of wireless user terminals belonging to the respective multicast groups, selecting one of the multicast groups using the assigned data rates, and transmitting information to the selected one of the multicast groups at the associated assigned data rate. In one embodiment, the multicast scheduling algorithm may be a multicast proportional fairness (MPF) scheduling algorithm which attempts to maximize utility value of data received by individual users. In one embodiment, the multicast scheduling algorithm may be an inter-group proportional fairness (IPF) scheduling algorithm which attempts to maximize utility value of data received by multicast groups.
摘要翻译：本发明包括一种方法和装置，用于通过选择允许在当前时隙中发送信息的蜂窝区域的多个多播组中的一个来调度无线网络中的多播传输。一种方法包括从多个多播组中的每一个的无线用户终端接收数据速率请求值，使用属于各个多播组的无线用户终端的数据速率请求值向每个多播组分配数据速率，使用分配的数据速率的多播组，并且以相关联的分配数据速率将信息发送到所选择的一个多播组。在一个实施例中，多播调度算法可以是尝试最大化由个体用户接收的数据的效用值的多播比例公平（MPF）调度算法。在一个实施例中，多播调度算法可以是组间比例公平（IPF）调度算法，其尝试最大化由多播组接收的数据的效用值。

8. 发明授权

US6091394A Technique for holographic representation of images 失效
标题翻译：图像全息图的技术
公开(公告)号：US6091394A
公开(公告)日：2000-07-18
申请号：US923480
申请日：1997-09-04
申请人： Alfred M. Bruckstein , Robert J. Holt , Arun N. Netravali
发明人： Alfred M. Bruckstein , Robert J. Holt , Arun N. Netravali
IPC分类号： G06F3/14 , G09G5/32 , H04N1/41 , H04N7/26 , H04N7/46
CPC分类号： G06F3/14 , H04N19/59 , G09G2340/02
摘要： In a communications system, an image to be transmitted is holographically represented in accordance with the invention. Relying on a portion of the holographic representation selected from any part thereof, a receiver can provide an overall version of the transmitted image. This overall version is successively refined as the size of the aggregate portion of the representation received by the receiver increases.
摘要翻译：在通信系统中，根据本发明全息地表示要发送的图像。依靠从其任何部分中选出的全息图的一部分，接收机可以提供所发送的图像的整体版本。随着接收器接收到的表示的聚合部分的大小增加，该整体版本被相继地改进。

9. 发明授权

US5136377A Adaptive non-linear quantizer 失效
标题翻译：自适应非线性量子
公开(公告)号：US5136377A
公开(公告)日：1992-08-04
申请号：US626279
申请日：1990-12-11
申请人： James D. Johnston , Scott C. Knauer , Kim N. Matthews , Arun N. Netravali , Eric D. Petajan , Robert J. Safranek , Peter H. Westerink
发明人： James D. Johnston , Scott C. Knauer , Kim N. Matthews , Arun N. Netravali , Eric D. Petajan , Robert J. Safranek , Peter H. Westerink
IPC分类号： H03M7/30 , G06T9/00 , H04N7/015 , H04N7/26 , H04N7/28 , H04N7/30 , H04N7/50 , H04N11/04
CPC分类号： H04N19/94 , H04N19/126 , H04N19/139 , H04N19/14 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/60 , H04N19/61 , H04N19/63 , H04N19/10 , H04N19/115 , H04N19/124 , H04N19/146 , H04N19/152
摘要： A quantizer, with quantization control that is sensitive to input signal characteristics and to output buffer fullness responds to an input signal that is divided into blocks and DCT transformed. The transformed signal is analyzed to develop a brightness correction and to evaluate the texture of the image and the change in texture in the image. Based on these, and in concert with the human visual perception model, perception threshold signals are created for each subband of the transformed signal. Concurrently, scale factors for each subband of the transformed signal are computed, and a measure of variability in the transformed input signal is calculated. A measure of the fullness of the buffer to which the quantizer sends its encoded results is obtained, and that measure is combined with the calculated signal variability to develop a correction signal. The correction signal modifies the perception threshold signals to develop threshold control signals that are applied to the quantizer. The scale factors are also applied to the quantizer, as well as a global target distortion measure.

10. 发明授权

US5128756A High definition television coding arrangement with graceful degradation 失效
标题翻译：高定义电视编码装置与严重降解
公开(公告)号：US5128756A
公开(公告)日：1992-07-07
申请号：US625349
申请日：1990-12-11
申请人： James D. Johnston , Scott C. Knauer , Kim N. Matthews , Arun N. Netravali , Eric D. Petajan , Robert J. Safranek , Peter H. Westerink
发明人： James D. Johnston , Scott C. Knauer , Kim N. Matthews , Arun N. Netravali , Eric D. Petajan , Robert J. Safranek , Peter H. Westerink
IPC分类号： H03M7/30 , G06T9/00 , H04N7/015 , H04N7/26 , H04N7/32 , H04N7/50 , H04N11/04
CPC分类号： H04N19/895 , H04N19/37 , H04N19/50 , H04N19/61
摘要： Graceful degradation for digitally encoded HDTV signals is achieved by appropriately coding the image to provide a controllable degradation of chosen image characteristics, such as temporal degradation, spatial degradation, and dynamic range degradation. In the temporal degradation approach of this invention, the resolution of movement suffers when noise is introduced. In the spatial degradation approach, the spatial resolution of the image is sacrificed. In the range degradation approach, the dynamic range of the signals is sacrificed. The graceful degradation is achieved by dividing the transmitted signal into two or more parts, such as parts A, B and C. Part A is given the heaviest error-correcting code; part B is given a "medium" error correcting code; and part C the is given the least powerful error correcting code (or perhaps none at all). A receiver that is close to the transmitter most likely receives parts A, B and C. A receiver that is farther away gets a noisier signal might and, perhaps, correctly receive only parts A and B. A receiver that is at the limits of the transmitter range might receive correctly only part A. Of course, the signals of parts A, B and C are constructed in a hierarchical fashion so that part A provides basic signal information; part B augments the basic information to produce a better picture; and part C augments part A plus B to produce the highest resolution picture.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式