本文研究了基2的时域抽取快速傅立叶变换各阶段的并行性，并据此设计了相应的蝶形和倒序运算核，在GPU上实现了二维fft运算。

This paper studies the parallelism of the different stages of decimation in time radix 2 FFT algorithm, designs the butterfly and scramble kernels and implements 2d FFT on GPU.

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本文设计了一种以任意速度、倒序播放音视频文件的方法。

We have developed a method that can be controlled to play video file at any speed in reverse sequence.

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