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1.发明授权Method and apparatus for aligning IDR frames in transcoded multi-bitrate video streams 有权用于在代码转换的多比特率视频流中对准IDR帧的方法和装置公开(公告)号：US08855197B2
公开(公告)日：2014-10-07
申请号：US13209490
申请日：2011-08-15
IPC分类号： H04N7/12 , H04N21/845 , H04N21/24 , H04N21/61 , H04N21/242 , H04N21/2343
CPC分类号： H04N21/2343 , H04N21/2402 , H04N21/242 , H04N21/6125 , H04N21/8455 , H04N21/8456
摘要： A video stream is transcoded to provide a plurality of primary profiles. Individual frames of the video stream have a Presentation Time Stamp (PTS). A PTS is used as a token to identify particular frames to be encoded as Instantaneous Decoder Refresh (IDR) frames in each profile. An IDR frame period is determined, indicative of a desired number of video frames between two IDR frames. An IDR frame is inserted into each profile every IDR frame period. The IDR frames of each profile are aligned with the same IDR frames of the other profiles. The PTS of each IDR frame in each profile is monitored. Upon determining that a PTS is out of alignment, the next PTS of the affected profile is aligned with the corresponding PTS of remaining profiles. Backup transcoders produce backup profiles that are maintained in alignment with each other and with the primary profiles.
摘要翻译： 视频流被转码以提供多个主要简档。 视频流的各个帧具有呈现时间戳（PTS）。 使用PTS作为令牌来识别要编码为每个配置文件中的瞬时解码器刷新（IDR）帧的特定帧。 确定IDR帧周期，表示两个IDR帧之间的期望数量的视频帧。 每个IDR帧周期将IDR帧插入每个配置文件。 每个配置文件的IDR帧与其他配置文件的相同IDR帧对齐。 监视每个配置文件中每个IDR帧的PTS。 在确定PTS不对齐时，受影响配置文件的下一个PTS与剩余配置文件的相应PTS对齐。 备份代码转换器产生保持彼此对齐和与主配置文件对齐的备份配置文件。
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2.发明申请公开(公告)号：US20130044803A1
公开(公告)日：2013-02-21
申请号：US13209490
申请日：2011-08-15
CPC分类号： H04N21/2343 , H04N21/2402 , H04N21/242 , H04N21/6125 , H04N21/8455 , H04N21/8456
摘要： A video stream is transcoded to provide a plurality of primary profiles. Individual frames of the video stream have a Presentation Time Stamp (PTS). A PTS is used as a token to identify particular frames to be encoded as Instantaneous Decoder Refresh (IDR) frames in each profile. An IDR frame period is determined, indicative of a desired number of video frames between two IDR frames. An IDR frame is inserted into each profile every IDR frame period. The IDR frames of each profile are aligned with the same IDR frames of the other profiles. The PTS of each IDR frame in each profile is monitored. Upon determining that a PTS is out of alignment, the next PTS of the affected profile is aligned with the corresponding PTS of remaining profiles. Backup transcoders produce backup profiles that are maintained in alignment with each other and with the primary profiles.
摘要翻译： 视频流被转码以提供多个主要简档。 视频流的各个帧具有呈现时间戳（PTS）。 使用PTS作为令牌来识别要编码为每个配置文件中的瞬时解码器刷新（IDR）帧的特定帧。 确定IDR帧周期，表示两个IDR帧之间的期望数量的视频帧。 每个IDR帧周期将IDR帧插入每个配置文件。 每个配置文件的IDR帧与其他配置文件的相同IDR帧对齐。 监视每个配置文件中每个IDR帧的PTS。 在确定PTS不对齐时，受影响配置文件的下一个PTS与剩余配置文件的相应PTS对齐。 备份代码转换器产生保持彼此对齐和与主配置文件对齐的备份配置文件。
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