隔行扫描，视频分辨率

最新推荐文章于 2024-06-03 09:39:14 发布

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最新推荐文章于 2024-06-03 09:39:14 发布 · 1.7k 阅读

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#each #h.264 #image #制造 #video

本文介绍了视频编码标准H.264以及隔行扫描技术的工作原理。隔行扫描通过交替传输奇偶行来减少信息量，常见于传统电视应用。视频分辨率则用垂直线条数量衡量，不同宽高比会影响最终数值。HDTV显示器要求至少能显示720p或1080i有效扫描线，以保证画质和成本平衡。

H.264即MPEG-4.10，SMPTE 421M（VC-1）是其有力的竞争者。

隔行扫描（interlaced），分成两场传输一帧，每次传输的数据量是少了一半，但是一帧画面传输的时间被拉长了，不知道这样理解对不对？原文如下：

In the early days of television, a technique called “interlacing” was used to reduce the amount of information sent for each image. By transferring the odd-numbered lines, followed by the even-numbered lines, the amount of information sent for each image was halved. Interlacing is still used for most consumer applications, except for computer monitors and some new digital television formats.

可是这一段如何理解呢：

With interlace, each scan line is refreshed half as often as it would be if it were a progressive display. Therefore, to avoid line flicker on sharp edges due to a too-low refresh r