一种只需10次加法的无乘法器剪枝类DCT变换用于图像和视频压缩
A Multiplierless Pruned DCT-like Transformation for Image and Video Compression that Requires 10 Additions Only
摘要：
提出了一种无乘法器的近似8点离散余弦变换（DCT），只需10次加法。该算法在图像和视频压缩中进行了评估，显示出与最先进的方法具有竞争力的性能。采用45 nm CMOS技术的数字实现达到布局布线级别，表明1.1 V电源时的时钟速度为288 MHz。8x8块速率为36 MHzdDCT近似被嵌入HEVC参考软件中;对于8位RGB HEVC，所产生的视频帧高达327 Hz，呈现出可忽略的图像劣化。
英文摘要：
A multiplierless pruned approximate 8-point discrete cosine transform (DCT) requiring only 10 additions is introduced. The proposed algorithm was assessed in image and video compression, showing competitive performance with state-of-the-art methods. Digital implementation in 45 nm CMOS technology up to place-and-route level indicates clock speed of 288 MHz at a 1.1 V supply. The 8x8 block rate is 36 MHz.The DCT approximation was embedded into HEVC reference software; resulting video frames, at up to 327 Hz for 8-bit RGB HEVC, presented negligible image degradation.
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