视频会议系统应用中的安全策略

文章从系统数据传输加密和构筑系统的安全环境两个方面介绍了视频会议系统应用中应注意的安全问题。同时,用实验数据说明在VPN下构筑小型视频会议的视频传输速率无影响。     

Reaching audiences through travel vlogs: The perspective of involvement

Travel vlogs are popular, but how audiences get involved while watching remains unclear. This study explored audience involvement along with expressions of travel intention. A systematic sampling procedure was developed, filtering 132 ‘highly involving sessions’ from 25 videos in Bilibili, a Chinese video-sharing platform. Qualitative analyses were applied, and the findings were threefold. Firstly, a five-category video content typology was highlighted, including frame aesthetics, video editing, fandom, humour, and tourist experiences. Secondly, bullet comments were deconstructed into six dimensions through examining concepts of ‘audience involvement’. Lastly, to address possible patterns of travel intention linked to the video content types, three propositions were made. This work serves as an exploration of audience involvement in the travel vlog phenomenon, an elaboration of travel intention expression in this context, and a method of assessing tourist-generated videos through bullet comments. Practical implications were discussed.     

基于Aptina ASX340的倒车影像系统设计与实现

为了避免倒车过程中因视觉盲区可能出现的安全隐患问题[1][2],文章采用飞思卡尔单片机做主机,Aptina图像传感器ASX340[3]做从机,利用ASX340内部的OVERLAY位图叠加系统,设计了一种能够将倒车过程中实时的车辆尾部的影像,距离障碍物的安全距离,倒车轨迹路径等信息提供驾驶员倒车影像系统[9][10]。使用HYRes3_1、Imatest软件[4]测量了影像图像质量的主要因素。测量结果表明成像质量能够满足目前车厂的要求。     

Digital gaming culture in Vietnam: an exploratory study

ABSTRACT

New information and communication technologies continue to spread rapidly into the Asian marketplace, which has led to new patterns of leisure consumption, one of the most popular being digital gaming. However, in Vietnam there is limited research on gaming as a leisure activity. The purpose of this study is to explore the phenomenon of digital gaming in Vietnam to better understand how it is practiced in this culture. Semi-structured interviews were conducted with twenty-five gaming industry figures and gamers. Thematic analysis was used to guide data collection and analysis. The findings indicate that glocalisation, socialised gaming practices and competitiveness characterise the Vietnamese gaming experience. The distinct culture of Vietnam combined with globalised gaming consumption habits has created new modes of play culture, and hence leisure experiences that are growing in pervasive and influential ways.     

修井作业现场3G网络视频监控系统的研究

目前油田修井作业现场生产方式存在信息不畅通的问题,无法实时跟踪监控井场安全生产运行情况和设备安全运转情况。研究应用"修井作业现场3G网络视频监控系统",能很好的解决作业现场视频信息及时交换问题,较好的解决了较偏远的作业队督查、监控问题,提高油田修井作业现场安全管理和应急管理水平。     

基于Linux的嵌入式远程视频采集控制系统设计

提出了一种基于Linux和嵌入式远程视频信息采集、压缩、传输和系统控制等方面的设计方法,能将监控现场的情况自动判断分析,对监控现场以报告和实时视频的形式通过网络在控制中心的显示屏上显示出来。     

鹤峰县茶叶企业网络营销策略探讨

网络媒介具有传播范围广、速度快的特点。鹤峰茶叶企业通过网络营销能够扩大营销渠道,节约成本。从鹤峰茶叶企业网络营销现状出发,分析了使用网络营销推广鹤峰品牌的意义,介绍了鹤峰茶叶企业网络营销的渠道,并提出发展鹤峰茶叶企业网络营销的对策。     

结合像素域JND阈值空间相关性与图像块类型的残差滤波算法

为了更好地将人眼视觉感知特性应用于视频压缩系统,从而去除视频的视觉冗余成分,在利用像素域的恰可察失真(Just Noticeable Distortion,JND)阈值的基础上,结合JND阈值的空间相关性与图像块类型,提出了一种改进的残差滤波算法。该算法首先在像素域计算出每个像素的JND阈值,然后在变换单元(Transform Unit,TU)中挖掘每个像素JND阈值与其周围邻近像素JND阈值之间的空间相关性,再利用索贝儿(Sobel)边缘检测算子将TU分成不同类型的图像块,并且计算出对应的复杂度因子,最后结合上述像素JND阈值的空间相关性和TU复杂度因子对TU残差进行滤波。提出的算法模型可以嵌入到高效率视频编码(High Efficiency Video Coding,HEVC)框架。实验结果表明,在全I帧配置下,提出的算法与标准算法HM16.0相比,在人眼主观感知质量基本一致的情况下,平均可节省16.1%的码率。     

基于电力线宽带通信技术的视频共享系统研究

本文通过研究电力线宽带通信技术以及视频共享中H.264编码、HDMI技术、音视频同步和遥控信号的传输多种关键技术,理论分析得出电力线宽带通信技术在实现视频共享中的可行性。进而提出该系统的系统架构以及具体实现方法,并通过实验平台的搭建与实验数据的实际测试,验证了理论分析结果以及实现方法的正确性。     

基于物联网的无人值守远程计量系统的设计与实现

针对厂矿计量系统的计量节点多,计量操作繁杂,人力成本较高,而且工作环境差,难于防范计量过程的作弊行为等诸多弊端,提出一种基于物联网的无人值守远程计量管理系统的设计.设计方案在充分利用已有硬件资源的基础上,通过RFID射频技术自动识别车牌、红外压边智能检测和视频监控技术等,对数据进行综合分析与管理,达到远程计量无人值守的目的.不但能使计量的数据信息及时准确,还能有效防止计量过程的作弊行为,进而实现优化企业资源配置,降低生产运营成本,提高管理效率,提升企业的市场竞争力.