Integer DCT Based on Direct-Lifting of DCT-IDCT for Lossless-to-Lossy Image Coding
Integer DCT Based on Direct-Lifting of DCT-IDCT for Lossless-to-Lossy Image Coding
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DOI：
10.1109/tip.2010.2051867
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发表时间：
2010-11
影响因子：
10.6
通讯作者：
Taizo Suzuki;M. Ikehara
中科院分区：
文献类型：
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作者：
Taizo Suzuki;M. Ikehara
离散余弦变换(DCT)可以很容易地在软件和硬件中实现，用于JPEG和MPEG格式。然而，尽管已经提出了一些用于无损到有损图像编码的整数DCT(IntDCT)，但这种变换需要重新设计设备。本文提出了一种硬件友好的IntDCT，它既适用于无损编码，也适用于有损编码。我们的IntDCT是通过直接提升DCT和逆DCT(IDCT)来实现的。因此，任何现有的DCT装置都可以直接应用于每一台起重吊车。虽然我们的方法需要很小的边信息块(SIB)，但它在无损到有损图像编码中的应用得到了验证。
A discrete cosine transform (DCT) can be easily implemented in software and hardware for the JPEG and MPEG formats. However, even though some integer DCTs (IntDCTs) for lossless-to-lossy image coding have been proposed, such transform requires redesigned devices. This paper proposes a hardware-friendly IntDCT that can be applied to both lossless and lossy coding. Our IntDCT is implemented by direct-lifting of DCT and inverse DCT (IDCT). Consequently, any existing DCT device can be directly applied to every lifting block. Although our method requires a small side information block (SIB), it is validated by its application to lossless-to-lossy image coding.