发明名称 |
Bit rate control for video data |
摘要 |
<p>A bit rate control mechanism for a digital image or video compression system estimates a complexity parameter for a current picture, or block of samples, of a video signal as a function of parameters for a prior picture of the video signal, which parameters include a bit rate. From the complexity parameter a quality factor for the current picture is determined and applied to a quantizer to compress the current picture. A complexity pre-processor may also be used to detect scene changes in the video signal prior to estimating the complexity parameter. If there is a scene change detected, then the rate control mechanism is reset prior to estimating the complexity parameter for the first picture in the new scene. <IMAGE></p> |
申请公布号 |
EP0778708(A2) |
申请公布日期 |
1997.06.11 |
申请号 |
EP19960308649 |
申请日期 |
1996.11.29 |
申请人 |
TEKTRONIX, INC. |
发明人 |
TABATABAI, ALI;EIFRIG, ROBERT O.;NAVEEN, T. |
分类号 |
G06T9/00;H04N7/26;H04N7/36;H04N7/50;(IPC1-7):H04N7/26 |
主分类号 |
G06T9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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