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中文摘要：
国际最新静止图像压缩标准——JPEG2000代表了离散小波变换（DWT）编码的最高水平，最新的视频压缩编码标准——H．264代表了离散余弦变换（DCT）编码的最高水平。由于H．264的帧内编码采用了一些新方法，如帧内空间预测、不同大小块的DCT变换等，使得H．264帧内编码效率高于其他的DCT变换编码方法，因此可以认为，H．264的帧内编码代表了DCT变换的最高静止图像编码水平。大量的仿真实验比较发现。H．264的帧内编码方法比JPEG2000的编码效率高。据此可以预测，基于帧内空间预测和不同大小块DCT变换的H．264帧内编码方法具有成为下一代静止图像压缩标准的潜能。
英文摘要：
JPEG2000 stands for the state-of the-art of still image coding based on discrete wavelet transform（DWT） , and H. 264/AVC stands for the state-of-the-art of video coding based on variable block sizes discrete cosine transform （DCT）. In addition, the H. 264/AVC I-frame encoder （ H. 264-IFE） adopted several advanced techniques, such as directional spatial prediction, variable and hierarchical block transform etc, which improve its coding efficiency significantly. Basically, H.264-IFE is also the state-of-the-art of still image compression algorithm based on block transform. In this paper, a performance evaluation between H. 264-IFE and JPEG2000 in terms of PSNR is presented. The experimental results show that H. 264-IFE achieves better reconstructed image quality than JPEG2000. These results demonstrated the H. 264-IFE＇s advanced techniques such as directional spatial prediction and variable block-size DCT coding are potential methods for developing next generation still image coding standard.
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