Video coding method
    1.
    发明申请
    Video coding method 审中-公开
    视频编码方式

    公开(公告)号:US20050074177A1

    公开(公告)日:2005-04-07

    申请号:US10950913

    申请日:2004-09-28

    摘要: A video coding method enabling implementation of resolution scalability while improving the coding efficiency. In the method, a band dividing section 104 performs band division on a high-resolution original image to generate a middle-resolution image, horizontal component, vertical component and diagonal component. The horizontal component is subjected to the DCT processing in horizontal layer DCT section 124, and then subjected to the bit-plane VLC processing in horizontal layer bit-plane VLC section 126. The vertical component is subjected to the DCT processing in vertical layer DCT section 130, and then subjected to the bit-plane VLC processing in vertical layer bit-plane VLC section 132. The diagonal component is subjected to the DCT processing in diagonal layer DCT section 136, and then subjected to the bit-plane VLC processing in diagonal layer bit-plane VLC section 138. In scanning, a scanning order is determined in consideration of bias in the distribution of DCT coefficients for each band component.

    摘要翻译: 一种能够在提高编码效率的同时实现分辨率可缩放性的视频编码方法。 在该方法中,带分割部分104对高分辨率原始图像执行带分割以产生中分辨率图像,水平分量,垂直分量和对角分量。 水平分量在水平层DCT部分124中进行DCT处理,然后在水平层位平面VLC部分126中进行位平面VLC处理。垂直分量在垂直层DCT部分中进行DCT处理 130,然后在垂直层位平面VLC部分132中进行位平面VLC处理。对角分量在对角线DCT部分136中进行DCT处理,然后在对角线中进行位平面VLC处理 在扫描中,考虑到每个频带分量的DCT系数的分布中的偏差来确定扫描顺序。

    Video communication apparatus and video communication method
    2.
    发明申请
    Video communication apparatus and video communication method 审中-公开
    视频通信设备和视频通信方式

    公开(公告)号:US20050175104A1

    公开(公告)日:2005-08-11

    申请号:US11045594

    申请日:2005-01-31

    摘要: The present invention improves confidentiality of video without incurring increased processing load. Coefficient scanner 123 scans the orthogonal transform coefficients of the base layer in scanning orders specified by scanning order determiner 150. Coefficient scanner 133 scans the orthogonal transform coefficients of the enhancement layer in scanning orders specified by scanning order determiner 150. When scanning is implemented in a privacy mode, scanning order determiner 150 determines the privacy mode scanning orders of the base layer and the enhancement layer individually and generates scan lists that indicate the scanning orders of the base layer and the enhancement layer respectively. Scan list transmitter 180 the scan lists of the base layer and the enhancement layer, generated in scanning order determiner 150, to specific users alone.

    摘要翻译: 本发明改善视频的机密性,而不会增加处理负担。 系数扫描器123以由扫描顺序确定器150指定的扫描顺序扫描基层的正交变换系数。 系数扫描器133以由扫描顺序确定器150指定的扫描顺序扫描增强层的正交变换系数。 当以隐私模式执行扫描时,扫描顺序确定器150分别确定基本层和增强层的隐私模式扫描顺序,并分别生成指示基本层和增强层的扫描顺序的扫描列表。 扫描列表发送器180将扫描顺序确定器150生成的基本层和增强层的扫描列表单独地存储给特定用户。