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530 条记录 (耗时 0.017 秒)

    Watermarking
    32.
    发明公开
    Watermarking 审中-公开
    水印

    公开(公告)号：EP1465405A3

    公开(公告)日：2005-01-19

    申请号：EP04010291.5

    申请日：2000-03-20

    申请人： BRITISH BROADCASTING CORPORATION

    发明人： Werner, Oliver ,  Mason, Andrew James ,  Salmon, Richard Aubrey

    IPC分类号： H04N1/32 ,  H04N7/32

    CPC分类号： H04N19/467

    摘要： A system and method of embedding a watermark in still or moving pictures without causing unacceptable visible picture degredation. The watermark is secure and can be readily detected, and the method can be used to convey additional data. Also disclosed is a method of watermarking a sequence of pictures in which the visibility of artifacts is reduced. The watermark may carry data and may be used to label a program.

    摘要翻译： 一种将水印嵌入静止或运动图像中而不引起不可接受的可见图像降级的系统和方法。 水印是安全的，可以很容易地检测到，并且该方法可以用来传送额外的数据。 还公开了一种对工件的可见性降低的图​​片序列进行水印的方法。 水印可以携带数据并且可以用来标记程序。

    Method and apparatus for generating a desired view of a scene from a selected viewpoint
    33.
    发明公开
    Method and apparatus for generating a desired view of a scene from a selected viewpoint 审中-公开
    用于从所选择的视点生成的场景的所需视图的方法和装置

    公开(公告)号：EP1465115A2

    公开(公告)日：2004-10-06

    申请号：EP04251470.3

    申请日：2004-03-15

    申请人： BRITISH BROADCASTING CORPORATION

    发明人： Thomas, Graham, c/o BBC Research Department ,  Brightwell, Peter, c/o BBC Research Department ,  Grau, Oliver, c/o BBC Research Department

    IPC分类号： G06T15/20

    CPC分类号： G06K9/209 ,  G06T15/20 ,  H04N5/222

    摘要： A method for generating a desired view of a real scene from a selected desired viewpoint by identifying objects in a real image, determining the positions of the identified objects, and rendering a view of the scene from a selected viewpoint using image data from the real image to render at least some of the identified objects. Other portions of the rendered view can be rendered using other source data which may be generic or historic. Identified objects may be tracked over a period of time to determine a trajectory or path: A user interface can be provided to assist in object tracking. A number of cameras can be used to provide a number of real images, and certain cameras may be controlled using the parameters of other cameras.

    摘要翻译： 一种用于通过在一个真实的图像识别的对象生成从所选择的期望的视点真实场景的所需视图的方法，确定的采矿所识别的对象的位置，并使用从真实图像的图像数据从所选择的视点呈现场景的一个视图 呈现至少某些所标识的对象。 所呈现的视图的其他部分可以使用哪个可以是通用的或历史的其它源的数据来呈现。 标识的对象可以跟踪在一段时间来确定的矿井的轨迹或路径：一个用户接口可以被提供，以协助在对象跟踪。 多个摄像机可以被用来提供多个真实图像，并且某些照相机可以使用的其它相机的参数来控制。

    TANDEM AUDIO COMPRESSION
    37.
    发明授权
    TANDEM AUDIO COMPRESSION 有权
    TANDEMAUDIOKOMPRESSION

    公开(公告)号：EP1116348B1

    公开(公告)日：2004-01-21

    申请号：EP99947657.5

    申请日：1999-09-23

    申请人： BRITISH BROADCASTING CORPORATION

    发明人： MASON, Andrew, James

    IPC分类号： H04H7/00 ,  H04B1/66

    CPC分类号： H04B1/665

    摘要： In a system in which an auxiliary data signal is conveyed with a decoded audio signal to assist in re-encoding, signature information is provided to assist in detecting changes in the decoded audio signal which would render the auxiliary data signal of little or no use in re-encoding. The signature information is most preferably included in the auxiliary data signal.

    Reduction of clipping in a multicarrier transmitter
    38.
    发明公开
    Reduction of clipping in a multicarrier transmitter 审中-公开
    在一个多载波发射器减少边界效应

    公开(公告)号：EP1104140A3

    公开(公告)日：2004-01-14

    申请号：EP00310571.5

    申请日：2000-11-29

    申请人： BRITISH BROADCASTING CORPORATION

    发明人： Moss, Peter Neil c/o British Broadcasting Corp.

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2614

    摘要： In an OFDM transmitter, the input signal is modified in several different ways by sign switches (22) operating on sub-bands generated by a splitter (20). An inverse fast Fourier transform circuit (14) generates an output for each of all the possible types of modification producing a plurality of candidate signals. The signal of best quality is selected by subjecting the candidate signals to processing in a model (54) representing the transmitter amplifier (16), and estimating the candidate signal of best quality determined by a clip energy estimator (58) and/or a low-level estimator (60). A control circuit (64) then causes the transmitter to transmit the candidate signal of best quality together with signalling information indicating the corresponding setting of the sign switches (22).

    Increasing the standard of a raster-scanned video signal, and interlace-to-sequential conversion
    40.
    发明公开
    Increasing the standard of a raster-scanned video signal, and interlace-to-sequential conversion 有权
    通过光栅扫描视频信号生成的信号的标准的改进和用于依次隔行扫描转换

    公开(公告)号：EP1253785A2

    公开(公告)日：2002-10-30

    申请号：EP02252726.1

    申请日：2002-04-17

    申请人： BRITISH BROADCASTING CORPORATION

    发明人： Easterbrook, James Edward, B.B.C.

    IPC分类号： H04N7/01 ,  H04N5/44

    CPC分类号： G09G3/00 ,  G09G5/006 ,  G09G2310/0229 ,  H04N7/012 ,  H04N19/59

    摘要： An interlace-to-sequential video standards converter receives an interlaced raster-scanned input signal at an input standard. A deinterlacer (14) inserts zero values into the signal so as to increase the standard to a required output standard. The output standard signal is formed into data blocks which in turn are subjected to a Fourier transformation (22) to produce a transformed signal containing a plurality of components each having a value. The components of the transformed signal are assigned (30) as signal or alias components, the assignment being made in dependence upon the component values. The component values which are assigned as signal components are then subjected (38) to an inverse Fourier transformation to provide at least the additional signal values required to increase the input signal to the output standard. Other types of up-conversion are possible, such as increasing the line standard of an existing sequential signal.
    The assignment operation proceeds by a cyclic process of growing signal and alias regions. As the assigner (30) assigns a component as 'signal', it assigns that component's alias as 'alias'. Initially the assigner assigns the "zero frequency" component (or a region around it) to 'signal' and the alias of that component (or region) to 'alias'. The 'signal' region is grown by considering all unassigned neighbour components and adding the one with greater magnitude. Its alias is added to the 'alias' region. Any component which is its own alias is assigned to a special 'border' class. When all samples have been assigned, those in the 'alias' region are set to zero, those in the 'border' class are attenuated by a factor of two and those in the 'signal' region are not modified.

    摘要翻译： 的隔行到顺序视频标准转换器在输入端上的隔行光栅扫描输入信号接收到的标准。 解交织器（14）中插入零个值到信号以便增加该标准所要求的输出标准。 输出信号被标准形成为依次进行傅里叶变换（22），以产生包含具有值的每个分量的多个变换的信号数据块。 经变换的信号的分量被分配（30）作为信号或别名组件，该分配在被在所述元件值依赖制成。 然后它们被分配为信号分量的元件值经受（38），以逆傅里叶变换，以提供至少增加输入信号输出到输出标准所需的额外信号值。 其他类型的上转换是可能的，：如增加现有的顺序信号的总线标准。 通过生长信号和别名区域的循环过程的分配手术进行。 由于分配器（30）分配一个成分作为“信号”，它分配做组件也被称为“变体”。 最初，分配器分配“零频率”成分（或在其周围的区域），以“信号”，做组分（或区域）的别名为“变体”。 的“信号”区域是通过考虑所有指派的相邻的组件和添加具有更大幅值的一个生长。 它的别名被添加到“别名”区域。 任何组件所有这是它自己的别名分配给一个特殊的“边界”类。 当所有的样品已经被分配，那些在“别名”区域被设置为零，那些在“边界”类是由两个因素和那些在“信号”区域不被修改衰减。