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    • 11. 发明授权
    • Dynamic bit rate control process
    • 动态比特率控制过程
    • US06895054B2
    • 2005-05-17
    • US10256476
    • 2002-09-27
    • Adam H. Li
    • Adam H. Li
    • G06T9/00H04N7/26H04N7/50H04B1/66
    • H04N19/198H04N19/126H04N19/149H04N19/172H04N19/194H04N19/196H04N19/61
    • A process of bit rate control includes asymmetrical reactions to changes in the signal density of the digital video signals. In the process, two different averaging periods are employed to meet a long term bit rate target and to achieve a short term quick reaction. When encoding a motion picture, the bit rate control is relaxed during high motion scenes to allow high peaks of bit rate at those points. The coding process reacts slowly to transitions from low to high motion sequences to preserve the best overall video quality, and reacts quickly to transitions from high to low motion sequences to enhance the image quality.
    • 比特率控制的过程包括对数字视频信号的信号密度变化的不对称反应。 在该过程中,采用两个不同的平均周期来满足长期比特率目标并实现短期快速反应。 当对运动图像进行编码时,在高运动场景期间比特率控制被放宽,以允许这些点处的比特率的高峰值。 编码过程对从低到高运动序列的转换进行缓慢的反应,以保持最佳的整体视频质量,并快速响应从高运动序列到低运动序列的转换,以提高图像质量。