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    Method and apparatus for instant channel change
    1.
    发明公开
    Method and apparatus for instant channel change 有权
    Schneller Videokanalwechsel

    公开(公告)号：EP1868367A1

    公开(公告)日：2007-12-19

    申请号：EP06290933.8

    申请日：2006-06-06

    申请人： Alcatel Lucent

    发明人： Heikens, Heico ,  De Vleeschauwer, Danny ,  Acke, Willem Josef Amaat

    IPC分类号： H04N5/00 ,  H04N7/173

    CPC分类号： H04N21/6587 ,  H04N7/173 ,  H04N21/23106 ,  H04N21/2381 ,  H04N21/4384 ,  H04N21/44004 ,  H04N21/6405 ,  H04N21/6408

    摘要： The present invention relates to a network unit adapted to transmit a video channel (Chx) to be played at a nominal motion speed (a), which network unit comprising:
    - a signaling means (104) adapted to receive a request (Join_Chx) from a decoding device (200) whereby transmission of the video channel is requested,
    - a video transmitting means (112) adapted thereupon to transmit the video channel towards the decoding device, initially as a dedicated multimedia stream (uC_Chx) dedicatedly supplied to the decoding device and comprising an independent video frame (I) as first transmitted video frame, and further in time as a common multimedia stream (MC_Chx) commonly supplied to a plurality of decoding devices (200, 220).
    A network unit according to the invention is characterized in that the video transmitting means is further adapted to transmit the video channel within the dedicated multimedia stream ahead of time with respect to transmission of the video channel within the common multimedia stream, and in that the video channel is to be initially played at an averagely slower motion speed (β, β', β", β"'), thereby allowing transmission of the video channel to be resumed with the common multimedia stream.
    The present invention also relates to a decoding device, to a method for transmitting a video channel, and to a method for receiving and playing that video video channel.

    摘要翻译： 本发明涉及一种网络单元，适用于以标称运动速度（a）传输要播放的视频信道（Chx），该网络单元包括： - 信令装置（104），适用于接收请求（Join_Chx） 解码装置（200），其中请求传输视频信道; - 视频发送装置（112），适于随后向解码装置发送视频信道，最初作为专用于提供给解码装置的专用多媒体流（uC_Chx） 并且包括作为第一传输视频帧的独立视频帧（I），并且进一步作为通常提供给多个解码设备（200,220）的公共多媒体流（MC_Chx）。 根据本发明的网络单元的特征在于，视频发送装置还适于相对于公共多媒体流内的视频频道的传输而在专用多媒体流中发送视频频道，并且视频 频道最初以平均较慢的运动速度（²，²“，”²“）播放，从而允许用公共多媒体流传输要恢复的视频频道。 本发明还涉及一种解码装置，一种用于发送视频频道的方法，以及一种用于接收和播放该视频视频频道的方法。