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闭路电视解读5G网络4K视频：更快、清晰_我的网站

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    Picture of an earthquake alert. Photo: VCG
After the Institute of Care-life, a Chengdu-based disaster reduction laboratory, mistakenly issued a 7.7-magnitude alert for a 4.7-magnitude earthquake, the Sichuan earthquake agency on Monday accused the institute of using the name of the official earthquake early warning network without authorization, saying its authorization to use the network had already been terminated last month.
A 4.7-magnitude earthquake struck Yibin at 8:26 am on Monday, according to the China Earthquake Networks Center. However, the Institute of Care-life issued a 7.7-magnitude earthquake alert just five seconds after the quake struck, causing panic among many users. 
The institute used the name of the "China Earthquake Early Warning Network" (an early warning system under the China Earthquake Administration) without authorization to issue a 7.7-magnitude earthquake alert to the public through Honor and Vivo smartphones, as well as Xiaotiancai smartwatches, drawing widespread public attention, said the Sichuan earthquake agency in a statement. 
The agency said it had terminated the institute's third-party authorization to access emergency earthquake information services from the China Earthquake Early Warning Network on July 22, 2026.
In response to the false alarm, the Institute of Care-life said that its earthquake early-warning network initially estimated the quake at magnitude 7.7 five seconds after it occurred, before revising the estimate to 6.4 at the sixth second, 3.7 at the seventh second, 4.1 at the eighth second and 3.9 at the 16th second. The estimated magnitude automatically converged to 3.9 by the 17th second after the earthquake, the institute said.
Addressing the significant discrepancy, the Institute of Care-life said that deviations in estimates of an earthquake's magnitude and epicenter are inevitable to some extent, as early-warning information is generated automatically shortly after a quake begins, before the seismic event has ended.
The Institute of Care-life apologized for the inaccurate alert and said it would investigate the cause as soon as possible while improving its technology and services.
Global Times
。1月13日，中央电视台与中国移动、华为共同在广东深圳成功进行5G网络4K电视传输测试。这是我国第一个5G新媒体平台建设后的又一重大突破。那么，用5G网络在线观看4K视频是什么样的体验呢？在这方面，让我们来看看中央电视台新闻的解读。首先，对5G网络的速度进行了研究。据央视解读，第五代移动通信技术标准的理论网络速率可达10GB/s（1.25GB/s），是家庭千兆宽带理论峰值速率的10倍（约1GB/s）。然而，这个值只是理论峰值，实际使用率也受环境和设备的影响，将远远小于“理论峰值”。据央视数据，目前主流手机wifi连接理论峰值速率为150MB/s，家庭常用100M宽带理论峰值速率为100MB/s，4G网络理论峰值速率为100MB/s（TD-LTE）。也就是说，5G比4G快100倍，除了网络速度的提高，5G网络的延时也会降低，约为1ms，这是保证自动驾驶安全的主要前提条件；5G网络支持每平方公里同时连接上百万台设备，使物联网成为现实。而智能家居则是一个现实；5G网络还支持连接速度高达500km/h的设备，这意味着即使在350km/h的高速铁路上，网络也将被连接起来。

二 | 你不能被困在这出戏里。为什么5G网络需要在线观看4K视频？为了提高分辨率，视频的总像素也将得到提高。4K视频将是1080p全高清视频总像素的四倍，视频量将更大。据央视数据，4K视频的需求率在40MB/s到60MB/s之间，虽然目前4G网络可以提供100MB/s的峰值速率，但实际使用率在8MB/s到60MB/s之间，不能满足4K视频观看的需求。升级到5G网络，个人最低速率要求提升到100MB/s，即使是最低速率，也能满足4K视频观看。此外，5G网络还可以实现AR增强现实、虚拟现实和未来8K视频在线播放功能。

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Published on:12:09:10