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公开(公告)号:US09094684B2
公开(公告)日:2015-07-28
申请号:US13330137
申请日:2011-12-19
IPC分类号: H04N7/26 , H04N7/12 , H04N11/02 , H04N11/04 , H04N19/194 , H04N19/172 , H04N19/15 , H04N19/115 , H04N19/142 , H04N19/103 , H04N19/107 , H04N19/124 , H04N19/152 , H04N19/179
CPC分类号: H04N19/124 , H04N19/103 , H04N19/107 , H04N19/114 , H04N19/115 , H04N19/117 , H04N19/142 , H04N19/146 , H04N19/15 , H04N19/152 , H04N19/172 , H04N19/176 , H04N19/179 , H04N19/184 , H04N19/186 , H04N19/194
摘要: A method of dual-pass rate control video encoding and an encoder are disclosed. Uncompressed input video is received with a video encoder. First pass encoding is performed, and a second pass encoding is performed with the video encoder at a delay relative to the first pass. The first pass encoding detects scene changes within the input video, assigns macroblocks to a pre-determined number of activity classes, and determines a complexity of each picture within the sequence of pictures. Information from the first pass encoding concerning the scene changes, the activity classes, and the complexity are used for rate control determined in second pass encoding for producing and outputting a bit stream of compressed video. During at least one of the first pass and second pass encoding, boundaries of at least some of the GOPs are adjusted to be aligned with the scene changes.
摘要翻译: 公开了一种双通速率控制视频编码方法和编码器。 视频编码器接收未压缩的输入视频。 执行第一遍编码,并且与视频编码器相对于第一遍延迟执行第二遍编码。 第一遍编码检测输入视频内的场景变化,将宏块分配给预定数量的活动类别,并且确定图像序列内的每个图像的复杂度。 来自关于场景变化的第一遍编码的信息,活动类别和复杂度被用于在用于产生和输出压缩视频的比特流的第二遍编码中确定的速率控制。 在第一遍和第二遍编码中的至少一个编码期间,至少一些GOP的边界被调整为与场景变化对准。
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公开(公告)号:US20130156098A1
公开(公告)日:2013-06-20
申请号:US13330137
申请日:2011-12-19
IPC分类号: H04N7/26
CPC分类号: H04N19/124 , H04N19/103 , H04N19/107 , H04N19/114 , H04N19/115 , H04N19/117 , H04N19/142 , H04N19/146 , H04N19/15 , H04N19/152 , H04N19/172 , H04N19/176 , H04N19/179 , H04N19/184 , H04N19/186 , H04N19/194
摘要: A method of dual-pass rate control video encoding and an encoder are disclosed. Uncompressed input video is received with a video encoder. First pass encoding is performed, and a second pass encoding is performed with the video encoder at a delay relative to the first pass. The first pass encoding detects scene changes within the input video, assigns macroblocks to a pre-determined number of activity classes, and determines a complexity of each picture within the sequence of pictures. Information from the first pass encoding concerning the scene changes, the activity classes, and the complexity are used for rate control determined in second pass encoding for producing and outputting a bit stream of compressed video. During at least one of the first pass and second pass encoding, boundaries of at least some of the GOPs are adjusted to be aligned with the scene changes.
摘要翻译: 公开了一种双通速率控制视频编码方法和编码器。 视频编码器接收未压缩的输入视频。 执行第一遍编码,并且与视频编码器相对于第一遍延迟执行第二遍编码。 第一遍编码检测输入视频内的场景变化,将宏块分配给预定数量的活动类别,并且确定图像序列内的每个图像的复杂度。 来自关于场景变化的第一遍编码的信息,活动类别和复杂度被用于在用于产生和输出压缩视频的比特流的第二遍编码中确定的速率控制。 在第一遍和第二遍编码中的至少一个编码期间,至少一些GOP的边界被调整为与场景变化对准。
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