首页>
外国专利>
Image interpolation and decimation using a continuously variable delay filter and combined with a polyphase filter
Image interpolation and decimation using a continuously variable delay filter and combined with a polyphase filter
展开▼
机译:使用连续可变延迟滤波器并结合多相滤波器进行图像插值和抽取
展开▼
页面导航
摘要
著录项
相似文献
摘要
A filter structure is provided that facilitates the use of the filter as either a continuous delay Farrow filter or a selectable delay polyphase filter. The less complex polyphase filter is used when the desired scale substantially corresponds to a defined phase of the polyphase filter, or when time or power is not available to achieve the desired scale exactly; otherwise, the continuous delay Farrow filter is used. By providing an ability to switch to a continuous delay, the number of stages of the polyphase filter can be reduced. Additionally, an inversion of a Farrow filter is presented that provides for a continuous delay decimation filter with substantially reduced computational complexity compared to a direct embodiment of a Farrow filter. This inverted filter is also configurable as a polyphase filter, to provide selectable scale-resolution capabilities.
展开▼