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公开(公告)号：EP0781434A4
公开(公告)日：1998-09-09
申请号：EP96912781
申请日：1996-04-19
发明人： AZADEGAN FARAMARZ , YAMAKAGE TOMOO , KOTO SHIN-ICHIRO , UNNO HIROAKI , MIMURA HIDEKI , KITAMURA TETSUYA , COOKSON CHRISTOPHER J , THAGARD GREG B , ROSEN ANDREW DRUSIN
IPC分类号： H04N5/92 , G06T9/00 , G11B20/10 , G11B27/02 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , G06F17/00
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/3027 , G11B27/329 , G11B27/34 , G11B27/36 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , H04N5/9262 , H04N7/52 , H04N9/8042 , H04N19/115 , H04N19/124 , H04N19/146 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/30 , H04N19/503 , H04N19/60 , H04N19/61
摘要： A method and system for re-encoding frames of a digital video stream without changing the previously calculated bit length of the stream. A set of macroblocks at a time are re-encoded (292), the number of resulting bits is calculated (306, 368) and the deviation from an estimated number of bits is calculated (372), either set-by-set or cumulatively. Based on the accuracy (372), of the estimate (422) and the remaining number of sets of macroblocks (424) to re-encode, a correction factor (710) for the quantization level of the next set of macroblocks is chosen from a lookup table. The correction factor is added to the quantization level of the next set of macroblocks (712) and the results stored as the new quantization level of the set (706). This sequential process is done for all sets of macroblocks in the digital stream which are to be recorded according to changed image qualities (706, 708, 710, 712, 714).
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公开(公告)号：EP0824824A4
公开(公告)日：1998-09-09
申请号：EP96912779
申请日：1996-04-19
发明人： AZADEGAN FARAMARZ , YOGESHWAR JAY , NG SHEAU-BAO , LEHMANN DAVID , TSINBERG MIKHAIL , UNNO HIROAKI , MIMURA HIDEKI , KITAMURA TETSUYA , COOKSON CHRISTOPHER J , THAGARD GREG B , ROSEN ANDREW DRUSIN
IPC分类号： H04N5/92 , G06T9/00 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/91 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/32 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , H04N5/76
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/3027 , G11B27/329 , G11B27/34 , G11B27/36 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , H04N5/9262 , H04N7/52 , H04N9/8042 , H04N19/115 , H04N19/124 , H04N19/146 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/30 , H04N19/503 , H04N19/60 , H04N19/61
摘要： A method and system in which a user manually changes the quality of portions of video frames after the frames have been previously encoded. Regions of one or more frames of video are selected to have an increased quality, a decreased quality, or a quality which should not be altered. After the regions are defined by a user, the frame of video is digitally re-encoded and inserted into the digitally encoded data stream in place of the previously encoded data. In order to easily remove a previously encoded frame from the data steam and replace it with a newly encoded frame having regions of quality defined by the user, it is preferable to have the newly encoded frame consume the same number of bits as the previously encoded frame. Accordingly, if the user desires a region of a frame to have an increased quality, the extra bits necessary to provide the increased quality must be taken from other areas of the frame. This is accomplished by an automatic process which is transparent to the user. Additionally, if the user wants to change the quality of an object for a series of video frames, the user can mark a region in a first frame and a corresponding region in a last frame and the system will automatically adjust the quality of the region as the region moves through the series of video frames.
摘要翻译： 一种方法和系统，其中用户在预先编码帧之后手动地改变视频帧的部分的质量。 选择一个或多个视频帧的区域具有增加的质量，降低的质量或不应改变的质量。 在由用户定义区域之后，将视频帧数字地重新编码并插入到数字编码的数据流中，代替先前编码的数据。 为了容易地从数据流中去除先前编码的帧，并用具有由用户定义的质量区域的新编码帧替换，优选地，新编码的帧消耗与先前编码的帧相同的比特数 。 因此，如果用户希望帧的区域具有增加的质量，则必须从帧的其他区域获取提供提高质量所需的额外比特。 这是通过对用户透明的自动过程来实现的。 此外，如果用户想要改变一系列视频帧的对象的质量，则用户可以标记最后一帧中的第一帧和对应区域中的区域，并且系统将自动地将该区域的质量调整为 该区域移动通过一系列视频帧。
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3.发明公开A SYSTEM FOR MANUALLY ALTERING THE QUALITY OF A PREVIOUSLY ENCODED VIDEO SEQUENCE 失效系统，用于手动改变先前编码的视频序列的质量
公开(公告)号：EP0824729A4
公开(公告)日：1998-09-09
申请号：EP96912782
申请日：1996-04-19
发明人： YOGESHWAR JAY , AZADEGAN FARAMARZ , NG SHEAU-BAO , LEHMANN DAVID , TSINBERG MIKHAIL , UNNO HIROAKI , MIMURA HIDEKI , KITAMURA TETSUYA , COOKSON CHRISTOPHER J , ROSEN ANDREW DRUSIN , THAGARD GREG B
IPC分类号： H04N5/92 , G06T9/00 , G11B20/10 , G11B20/12 , G11B27/00 , G11B27/031 , G11B27/034 , G11B27/30 , G11B27/32 , G11B27/34 , G11B27/36 , H04N5/926 , H04N7/26 , H04N7/30 , H04N7/36 , H04N7/50 , H04N7/52 , H04N9/804 , H04N9/806 , G06F17/00
CPC分类号： H04N9/8063 , G11B27/031 , G11B27/034 , G11B27/3027 , G11B27/329 , G11B27/34 , G11B27/36 , G11B2220/2562 , G11B2220/90 , G11B2220/913 , H04N5/9262 , H04N7/52 , H04N9/8042 , H04N19/115 , H04N19/124 , H04N19/146 , H04N19/15 , H04N19/154 , H04N19/157 , H04N19/159 , H04N19/162 , H04N19/17 , H04N19/172 , H04N19/192 , H04N19/30 , H04N19/503 , H04N19/60 , H04N19/61
摘要： A system (31, 41, 32, 33) in which a user manually changes the quality of specific time periods of encoded video (180). After the automatic encoding (50) of video into a compressed digital format, a person editing (31, 33) the encoded video reviews the quality of the video and manually indicates that the quality of specific time periods (180) of the video is to be altered. As the digital storage medium such as an optical disc (84, 90) which stores the encoded video has finite storage capacity, the total number of bits for the encoded video (50) and the quality of the video is limited. A percentage of bits are removed from time sequence and placed in a bit pool (368). Using an exponential function (368) new bits are calculated and the bits in the bit pool are proportionally distributed to the video frames (376). The frames must then be checked (394) and possibly adjusted (398, 400) to prevent underflow of the video buffer.
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