公开(公告)号：EP1450555A1

公开(公告)日：2004-08-25

申请号：EP03290401.3

申请日：2003-02-18

申请人： Thomson Licensing S.A.

发明人： Morel, Phillippe ,  Malnoe, Pascal ,  Bellanger, Didier

IPC分类号： H04N5/04 ,  H04N5/073

CPC分类号： H04N5/23203 ,  H04N5/04 ,  H04N5/073 ,  H04N5/268

摘要： A video system comprises a first video device (1) which transmits a video signal (CVS C ) comprising image information and synchronisation information and a second video device which receives said composite video signal (CVS C ). The second device has a time base (21). For synchronising the two devices

a) synchronisation information (ΦI C , ΦL C ; ΦI M , ΦL M ) is extracted from the video signal (CVS C ) received by the second video device (2) and from the time base (21) of the second video device (2);
b) a phase difference (ΔΦI, ΔΦL) between the video signal (CVS C ) received by the second video device (2) and the time base (21) of the second video device (2) is determined based on said extracted synchronisation information (ΦI C , ΦL C ; ΦI M , ΦL M ) ;
c) control information (ΔΦI) of a first type representative of the amount of said phase difference is transmitted to said first device (1); and
d) in said first device (1) the phase of the video signal (CVS C ) is switched by a phase angle represented by said first type control information (ΔΦI).

摘要翻译： 视频系统包括发送包括图像信息和同步信息的视频信号（CVSC）的第一视频设备（1）和接收所述复合视频信号（CVSC）的第二视频设备。 第二设备具有时基（21）。 为了同步两个设备，a）从第二视频设备（2）接收的视频信号（CVSC）和从第二视频设备（2）的时基（21）提取同步信息（PHI IC，PHI LC; PHI IM，PHI LM） 第二视频设备（2）; b）基于所述第二视频设备（2）接收的视频信号（CVSC）和第二视频设备（2）的时基（21）之间的相位差（DELTA PHI I，DELTA PHI L） 提取同步信息（PHI IC，PHI LC; PHI IM，PHI LM）; c）将表示所述相位差的量的第一类型的控制信息（DELTA PHI I）发送到所述第一设备（1）; 和d）在所述第一装置（1）中，视频信号（CVSC）的相位被所述第一类型控制信息（DELTA PHI I）表示的相位角切换。