块截短编码(BTC)是一种快速有效的有损图像编码技术。

Block truncation coding (BTC) is an efficient and fast lossy image coding technique.

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因此，研究基于DCT的图像编码技术，有着一定的是实用价值。

It is practical to study image coding technique based on DCT.

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提出了一种在非常低比特率情况下具有高质量的图像编码技术——特征头像集编码方案。

This paper presents a video coding technique that achieves high visual quality at very low bit rates.

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