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    METHOD AND DEVICE FOR TRANSCODING VIDEO SIGNALS
    4.
    发明公开
    METHOD AND DEVICE FOR TRANSCODING VIDEO SIGNALS 失效
    用于转换视频信号的方法和设备

    公开(公告)号：EP0755610A1

    公开(公告)日：1997-01-29

    申请号：EP96900398.0

    申请日：1996-01-25

    申请人： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

    发明人： KEESMAN, Gerrit, Johan ,  VAN OTTERLOO, Petrus, Johannes

    IPC分类号： H03M7 ,  H04N7

    CPC分类号： H04N19/40 ,  H04N19/115 ,  H04N19/124 ,  H04N19/14 ,  H04N19/146 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61

    摘要： A method of transcoding coded video signals and a corresponding device for implementing this method are described. The device comprises a decoding and encoding sub-assemblies (201, 202) and, within said encoding sub-assembly, quantizing means (23) and bitrate control means. This bitrate control means comprises, before said quantizing means (23), means for computing a local target value for encoding each sub-picture of the images to which video signals correspond and means for controlling the step size during the quantizing step.

    摘要翻译： 描述了一种对编码的视频信号进行转码的方法和用于实现该方法的相应设备。 该设备包括解码和编码子组件（201,202），并且在所述编码子组件内包括量化装置（23）和比特率控制装置。 该比特率控制装置在所述量化装置（23）之前包括用于计算用于对视频信号所对应的图像的每个子图像进行编码的局部目标值的装置，以及用于在量化步骤期间控制步长的装置。

    METHOD AND DEVICE FOR DECODING DIGITAL VIDEO BITSTREAMS AND RECEPTION EQUIPMENT INCLUDING SUCH A DEVICE
    5.
    发明公开
    METHOD AND DEVICE FOR DECODING DIGITAL VIDEO BITSTREAMS AND RECEPTION EQUIPMENT INCLUDING SUCH A DEVICE 失效
    方法和设备，用于解码数字VIDEOBITDATEN接收器件THEREFOR

    公开(公告)号：EP0783817A2

    公开(公告)日：1997-07-16

    申请号：EP96918815.0

    申请日：1996-07-09

    申请人： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

    发明人： KEESMAN, Gerrit, Johan

    IPC分类号： H04N7 ,  H04J3 ,  H04N5

    CPC分类号： H04N21/4384 ,  H04N5/4401

    摘要： Decoding method and device with which it is proposed, in order to reduce the switching time from one among n input digital video bitstreams corresponding to n programs to another one, to use under the supervision of control means (30) including a control unit (31) and a switch (32), while a selected digital video bitstream is presented for decoding and display, (n-1) buffers (22, 23) for the (n-1) extra bitstreams, these extra buffers being dimensioned so that they always comprise at least an intra frame, and preferably the most recent one, of each incoming extra bitstream. In a simpler embodiment where the next program switched to is one up or one down, only one or two extra buffers are necessary, subject to the knowledge of an information on how the incoming programs may be accessed, i.e. according to some defined order. Application: reception equipments for decoding of digital television programs in accordance with the MPEG standard.