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    • 4. 发明申请
    • VIDEO NETWORK
    • 视频网络
    • WO2004064277A3
    • 2004-11-18
    • PCT/GB2004000159
    • 2004-01-16
    • SONY UK LTDGILLARD CLIVE HENRYCOMPTON MATTHEWWILSON DANIELCHEN JIAN-RONG
    • GILLARD CLIVE HENRYCOMPTON MATTHEWWILSON DANIELCHEN JIAN-RONG
    • H04J20060101H04L12/801H04L12/811H04L12/931H04N7/26
    • H04L47/10H04L47/38H04L49/201H04L49/352
    • A video network comprises: a plurality of video sources to launch onto the network first, higher resolution, video data and second, lower resolution, video data providing a lower resolution representation of the higher resolution video data; at least one destination device operable to process video received via the network; a network switch for selectively routing data from the video sources to the destination devices; and a network control arrangement connected to the network switch and having: a display device; a graphical user interface (GUI) arranged to display, on the display device, the lower resolution representations of video data from at least a subset of the plurality of sources together with identifiers associating the lower resolution representations with the respective sources; means for user selection, by use of the GUI, of a source of video of the higher resolution and a corresponding destination device; and means for controlling the routing of the higher resolution video data from the selected video source to the selected destination device.
    • 一种视频网络包括:多个视频源,用于在网络上发射第一分辨率较高的视频数据和第二分辨率较低的视频数据,以提供较高分辨率视频数据的较低分辨率表示; 至少一个目的地装置,其可操作以处理经由网络接收的视频; 网络交换机,用于选择性地将数据从视频源路由到目的地设备; 以及网络控制装置,连接到所述网络交换机并且具有:显示装置; 图形用户界面(GUI),被布置成在显示设备上显示来自多个源的至少一个子集的视频数据的较低分辨率表示以及将较低分辨率表示与各个源相关联的标识符; 用于通过使用GUI来选择较高分辨率的视频源和对应的目的地装置的装置; 以及用于控制将来自所选视频源的较高分辨率视频数据路由到所选目的地设备的装置。
    • 7. 发明专利
    • Video synchronisation
    • GB2400255A
    • 2004-10-06
    • GB0307459
    • 2003-03-31
    • SONY UK LTD
    • COMPTON MATTHEWGILLARD CLIVE HENRY
    • H04L7/00H04N21/43H04N5/04H04N7/24
    • A method of synchronising the phase of a local image synchronisation signal generator of a local video data processor in communication with an asynchronous switched packet network to the phase of a reference image synchronisation signal generator of a reference video data processor also coupled to the network, the local and reference processors having respective clocks, the reference and local image synchronisation signal generators generating periodic image synchronisation signals in synchronism with the reference and local clocks respectively comprises the steps of: ```frequency synchronising the local and reference clocks; ```the reference video data processor sending, via the network, to the local data processor an image timing packet providing reference image synchronisation data indicating the difference in timing, measured with respect to the reference processor's clock, between the time at which the image timing packet is launched onto the network and the time of production of the immediately preceding reference image synchronisation signal; and ```the local processor controlling the timing of the production of the local image synchronisation signal in dependence on the reference image synchronisation data and the time of arrival of the timing packet.
    • 9. 发明专利
    • Concealing errors
    • GB2326300B
    • 2001-11-21
    • GB9712035
    • 1997-06-10
    • SONY UK LTD
    • GILLARD CLIVE HENRY
    • G11B20/18H04N5/92H04N19/895H04N5/94
    • A video data compression system uses a wavelet transform circuit (580) but otherwise operates in the manner of an MPEG II compression system. The compressed data is stored on a medium such a tape by e.g. digital video tape recorder (3), which medium and recorder may subject that data to errors by virtue of head failures and/or tape defects. Means (5) are provided to produce concealment data indicative of the form of concealment to be used if data is lost during reproduction. A variety of concealment techniques are used. Some of the transformed data is frequency inverted during transformation. Such data is subject to high pass filtering to conceal errors. Concealment data indicates the most appropriate form of concealment to be used in the event of an error is produced before recording and recorded with the data. The concealment data is recorded on a track different to the track of the data with which it is associated. The concealment data may be produced by trial concealments and/or by providing predetermined concealment data for different forms of data.