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2. 发明授权

US06246720B1 Flexible software-based decoding system with decoupled decoding timing and output timing 有权
标题翻译：灵活的基于软件的解码系统具有去耦解码定时和输出时序
公开(公告)号：US06246720B1
公开(公告)日：2001-06-12
申请号：US09422910
申请日：1999-10-21
申请人： Michael Alan Kutner , Markus Hendrikus Veltman , Masahito Yamane , Ikuo Tsukagoshi , Klaus Zimmermann
发明人： Michael Alan Kutner , Markus Hendrikus Veltman , Masahito Yamane , Ikuo Tsukagoshi , Klaus Zimmermann
IPC分类号： H04N712
CPC分类号： H04N21/4143 , H04N5/04 , H04N5/4401 , H04N19/42 , H04N19/61 , H04N21/4341 , H04N21/8193
摘要： A flexible software-based decoding system with decoupled decoding timing and output timing. In one embodiment, a computer software implemented method of decoding a data stream comprising encoded video data is provided. In this embodiment, the software method comprises the step of maintaining a number of already decoded and ready-for-output frames in a frame buffer. The method also comprises the step of decoding a first encoded frame of the data stream to generate an additional decoded frame. The method further comprises the step of outputting a first of the decoded frames before decoding of the first encoded frame is completed if the decoding step requires more time than a predefined frame output time to complete. Moreover, in this embodiment, the method comprises the step of adding the first additional decoded frame to the frame buffer. In this embodiment, real-time output is maintained irrespective of whether completion of the decoding step requires more time than the predefined frame output time for particular frames. In one embodiment, the method further comprises the step of decoding a second encoded frame of the data stream substantially immediately upon completion of the decoding step to generate a second additional decoded frame, provided that the completion of the decoding step requires more time than the predefined frame output time, and also the step of adding the second additional decoded frame to the frame buffer.
摘要翻译：一种灵活的基于软件的解码系统，具有去耦解码定时和输出时序。在一个实施例中，提供了一种对包括编码视频数据的数据流进行解码的计算机软件实现方法。在该实施例中，软件方法包括在帧缓冲器中保持已经解码和准备好输出的帧的数量的步骤。该方法还包括解码数据流的第一编码帧以产生附加解码帧的步骤。该方法还包括如果解码步骤需要比预定的帧输出时间更长的时间完成，则在完成第一编码帧的解码之前输出第一解码帧的步骤。此外，在本实施例中，该方法包括将第一附加解码帧添加到帧缓冲器的步骤。在该实施例中，不管完成解码步骤是否需要比特定帧的预定帧输出时间更多的时间，维持实时输出。在一个实施例中，该方法还包括在完成解码步骤之后基本上立即对数据流的第二编码帧进行解码以产生第二附加解码帧的步骤，条件是解码步骤的完成需要比预定义的更多的时间帧输出时间，以及将第二附加解码帧添加到帧缓冲器的步骤。

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