Adaptive Scanning for H.264/AVC Intra Coding
Adaptive Scanning for H.264/AVC Intra Coding
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DOI：
10.4218/etrij.06.0206.0095
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发表时间：
2006-10
期刊：
影响因子：
1.4
通讯作者：
Yung-Lyul Lee;Ki-Hun Han;D. Sim;Jeongil Seo
中科院分区：
文献类型：
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作者：
Yung-Lyul Lee;Ki-Hun Han;D. Sim;Jeongil Seo
在这封信中，提出了一种可提高 H.264/AVC 标准中的帧内编码效率的自适应扫描。所提出的自适应扫描利用包括块中的水平和垂直边缘信息的预测方向（模式）。根据预测方向，该方法采用三种扫描方法：之字形扫描、水平扫描和垂直扫描。在所提出的方法中，水平和垂直扫描分别用于垂直和水平预测模式，并且H.264标准中的正常之字形扫描用于所有其他帧内预测模式。与H.264/AVC相比，该方法将比特率降低约2.5%，且视频质量没有下降。
In this letter, an adaptive scanning that improves intra coding efficiency in the H.264/AVC standard is proposed. The proposed adaptive scanning utilizes the prediction directions (modes) that include the horizontal and vertical edge information in a block. Depending on the prediction directions, the proposed method uses three scanning methods: zigzag scanning, horizontal scanning, and vertical scanning. In the proposed method, horizontal and vertical scanning are used in vertical and horizontal prediction modes, respectively, and the normal zigzag scanning in the H.264 standard is used in all other intra prediction modes. The proposed method reduces the bit rate by approximately 2.5% compared with H.264/AVC, without the degradation of video quality.