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    • 5. 发明申请
    • IMPROVED VIDEO EFFECT RECALL TECHNIQUE
    • 改进的视频效果调用技术
    • WO2007030096A1
    • 2007-03-15
    • PCT/US2005/031323
    • 2005-09-02
    • THOMSON LICENSINGSILBERSTEIN, Ralph, Andrew
    • SILBERSTEIN, Ralph, Andrew
    • H04N5/262G06T15/00G06T3/00G11B27/031
    • H04N5/268G11B27/038H04N5/262
    • A video switcher (10) advantageously affords the capability of executing a video effect following recall that avoids visible artifacts upon transitioning from one effect to another. At the outset, the switcher identifies active elements within the video effect, the comprising those elements that undergo a change during execution of the video effect, as opposed to those that remain inert during effect execution. The switcher then dynamically calculates offset for application to an initial key frame value for the video effect to avoid any change in value to active elements upon initial effect recall. The offset value is applied to each subsequent interpolation of the video effect, thereby creating the desired result of applying only relative changes to the active elements of the video effect.
    • 视频切换器(10)有利地提供执行在调用之后执行视频效果的能力,其在从一个效果转换到另一个效果时避免可见的伪影。 首先,切换器识别视频效果中的有效元素,其包括在执行视频效果期间经历改变的元素,而不是在效果执行期间保持惰性的元素。 然后,切换器动态地计算应用的偏移量到视频效果的初始关键帧值,以避免在初始效果调用时对活动元素的值的任何改变。 偏移值被应用于视频效果的每个随后的插值,从而创建仅对视频效果的有效元素进行相对变化的期望结果。