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2. 发明申请

US20070014531A1 Method and system for providing instant reverse play 失效
标题翻译：提供即时反向播放的方法和系统
公开(公告)号：US20070014531A1
公开(公告)日：2007-01-18
申请号：US11182158
申请日：2005-07-15
申请人： Mushtaq Mughal , Abid Khan , Mumtaz Ahmad , Haroon Rashid
发明人： Mushtaq Mughal , Abid Khan , Mumtaz Ahmad , Haroon Rashid
IPC分类号： H04N5/91
CPC分类号： H04N9/8042 , H04N5/781 , H04N5/783
摘要： A method for displaying video data instantly in reverse order is disclosed. According to the method, a compressed audio and video (A/V) stream is received from a source. The compressed A/V stream is demultiplexed into an audio stream and a video stream. The video stream has a number of compressed video frames which include a number of key frames. Each key frame is followed by one or more associated frames. Each of the compressed video frames is tagged with a tag. The tag associated with each key frame and file position of each key frame is stored in a table. The compressed video frames are decoded to generate a number of decoded video frames while maintaining their corresponding tags. During normal play, the decoded video frames are stored in a forward queue, and the decoded video frames in the forward queue are then outputted in a FIFO (first-in-first-out) order to a reverse queue and a display device for display. The reverse queue operates in a FIFO manner by discarding the oldest decoded video frame stored in the reverse queue when the reverse queue is full. During reverse play, the tag of the oldest decoded video frame in the reverse queue is recorded when a reverse play command is received, and the decoded video frames in the reverse queue are outputted in a LIFO (last-in-first-out) order to the forward queue and the display device for display. At the start of the reverse play, the forward queue operates in a LIFO manner until the most recently decoded video frames stored in the forward queue are discarded. Thereafter, the forward queue and the reverse queue operate in a FIFO manner. The recorded tag is used to retrieve one or more compressed video frames from the source. The retrieved one or more compressed video frames are tagged and decoded to generate one or more newly decoded video frames. The one or more newly decoded video frames are forwarded to the reverse queue.
摘要翻译：公开了以相反的顺序立即显示视频数据的方法。根据该方法，从源接收压缩的音频和视频（A / V）流。压缩的A / V流被解复用为音频流和视频流。视频流具有包括多个关键帧的多个压缩视频帧。每个关键帧之后是一个或多个相关联的帧。每个压缩视频帧都标记有一个标签。与每个关键帧的每个关键帧和文件位置相关联的标签存储在表中。对压缩的视频帧进行解码以产生多个解码的视频帧，同时保持其对应的标签。在正常播放期间，将解码的视频帧存储在前向队列中，然后将前向队列中的解码视频帧以FIFO（先进先出）顺序输出到反向队列和用于显示的显示装置。反向队列通过在反向队列已满时丢弃存储在反向队列中的最旧解码视频帧，以FIFO方式运行。在反向播放期间，当接收到反向播放命令时，记录反向队列中最旧的解码视频帧的标签，并且以LIFO（先进先出）顺序输出反向队列中的解码视频帧到转发队列和显示设备进行显示。在反向播放开始时，前向队列以LIFO方式运行，直到丢弃存储在转发队列中的最近解码的视频帧。此后，前向队列和反向队列以FIFO方式运行。记录的标签用于从源中检索一个或多个压缩视频帧。检索到的一个或多个压缩视频帧被标记和解码以产生一个或多个新解码的视频帧。一个或多个新解码的视频帧被转发到反向队列。

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