网站首页  情感咨询  情感美文  情感百科  情感生活  学习充电  旧版美文

请输入您要查询的词汇:

 

词汇 Vision electronic recording apparatus
分类 英语词汇 英语翻译词典
释义

Vision electronic recording apparatus

中文百科

VERA 格式

视觉电子记录设备英语:Vision Electronic Recording Apparatus)是一种由BBC公司开发的利用磁带来存储电视信号的技术。这项技术从1952年起开始立项,1956年进行了首次演示。它每秒转动70英尺(约21.34米)的磁带,能在直径21英尺(总长4572米)的磁带上储存15分钟的405线制式电视节目。由于来自美国的Quadruplex格式的挑战,1958年BBC放弃了这种技术。

英语百科

Vision electronic recording apparatus VERA 格式

Vision Electronic Recording Apparatus (VERA) was an early analog recording videotape format developed from 1952 by the BBC under project manager Dr Peter Axon.

In order to record high frequencies, a tape must move rapidly with respect to the recording or playback head. The frequencies used by video signals are so high that the tape/head speed is on the order of several meters per second (tens of feet per second), an order of magnitude faster than professional analog audio tape recording. The BBC solved the problem by using 52-centimetre (20 in) reels of magnetic tape that passed static heads at a speed of 5.08 metres per second (16.7 ft/s).

随便看

 

依恋情感网英汉例句词典收录3870147条英语例句词条,基本涵盖了全部常用英语单词的释义及例句,是英语学习的有利工具。

 

Copyright © 2004-2024 Yiyi18.com All Rights Reserved
京ICP备2021023879号 更新时间:2025/8/8 11:00:36