【文件属性】：
文件名称：BT.656 Format
文件大小：137KB
文件格式：PDF
更新时间：2012-01-08 08:17:55
BT.656
Introduction
When ITU-R BT.601, formally CCIR-601, was developed
(which defined the YCbCr color space, the 4:2:2 YCbCr
sampling organization, and sampling resolutions), it was
soon followed by ITU-R BT.656 (formally CCIR-656).
BT.656 defined the parallel and serial interfaces for transmitting
4:2:2 YCbCr digital video between equipment in studio
and pro-video applications. Active video resolutions are
either 720 x 486 (525/60 video systems) or 720 x 576
(625/50 video systems).
The BT.656 parallel interface uses 8 or 10 bits of multiplexed
YCbCr data and a 27MHz clock (ECL levels are used for the
data and clock signals). Instead of the conventional video
timing signals (HSYNC, VSYNC, and BLANK) also being
transmitted, BT.656 uses unique timing codes embedded
within the video stream. This reduces the number of wires
(and IC pins) required for a BT.656 video interface.
Ancillary digital information (such as audio, closed captioning,
and teletext) may also be transmitted during the blanking
intervals. This eliminates the need for a separate audio
interface and additional control signals.
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- 学习了一下,有参考价值.谢谢！
- 很经典的 BT656解释