基于WEB的网络视频监控技术研究

将视频监控与Internet相结合,通过浏览器进行远程监控。使用VFW软件包,通过摄像头实现对视频信号的采集、编码、存储以及视频数据的网络传输;PC机将作为Web服务器在Internet上发布实时监控信息。实现远程用户在不使用第三方插件的情况下使用浏览器实施监控。满足视频应用程序开发的需要。     

基于4Cs营销理论的会议营销创新

会议营销是以保健品为代表的众多产品所选择的一种新营销模式。本文以4Cs营销理论为基础,分析了会议营销在实践中所具有的优势和存在的问题,有针对性地提出了会议营销创新的方法。     

基于VFW的视频采集设计

针对视频电话、视频会议等系统的实时视频采集的需求,研究基于VFW接口的视频采集方法。使用VFW接口枚举并打开视频设备,在回调函数中实现对视频帧的获取和压缩。     

无人机数字视频图像传输技术

提出了无人机测控系统数字视频图像传 输系统的设计方案,分析了RS+卷积编码体制对编码数据块的定位需求,提出了用帧同步环 定位 编码数据块的方法。针对帧同步环对数据流的特殊要求,讨论了由FPGA数字系统自身导致的 速率匹配问题,提出了相应的解决方法。     

关于FMO分离模式下H.264/AVC视频传输误差控制的研究

H.264/AVC视频压缩标准对信道错误的鲁棒性是重点由它错误控制技术进行评估的,我们称错误评估技术为FMO.我们调查研究了FMO作为一种H.264的误差控制技术是如何在一个容易产生错误的网络中对于传输误差和包丢失进行最好的处理.一种新的使用MBAmap将宏块映射到条带组的方法已经采用,这种方法可以帮助在解码中进行误差隐蔽技术并且提高了被接收视频的主客观性能.     

关于FMO分离模式下H.264/AVC视频传输误差控制的研究(英文)

H.264/AVC视频压缩标准对信道错误的鲁棒性是重点由它错误控制技术进行评估的,我们称错误评估技术为FMO。我们调查研究了FMO作为一种H.264的误差控制技术是如何在一个容易产生错误的网络中对于传输误差和包丢失进行最好的处理。一种新的使用MBAmap将宏块映射到条带组的方法已经采用,这种方法可以帮助在解码中进行误差隐蔽技术并且提高了被接收视频的主客观性能。     

Timing is money: managing the floor in sales interaction at street-market stalls

Abstract

This article considers ‘pricing’, that is, offers and requests for the price of sales items, as a communicative practice deployed by vendors and customers during sales interaction on street markets. It examines the organisation of sales interaction by pursuing the question of how and when market participants, vendors and customers alike, embed offers and requests for price information within their interaction. The analysis suggests that pricing is deployed as a technique to manage the ‘floor’ and the interaction at the stall. For example, offers for items are being tailored to customers’ display of interest and commitment to particular items, and requests for price information are deployed in ways that challenge anticipated offers, that is, offers that are about to be made by a vendor. The data, field observation and video-recording have been gathered at market stalls in London and Berlin.     

Enhancing farmers’ capacity for botanical pesticide innovation through video-mediated learning in Bangladesh

Despite the general success of farmer-capacity-building methods such as Farmer Field School in promoting pest management innovations, only those farmers directly involved benefit. How can agricultural extension enable farmer-to-farmer learning about botanical pesticides beyond such schools? We wanted to know how different learning methods, such as video shows and workshops, change farmers’ knowledge, attitudes and practices about botanical pesticides. This paper explains how video engages men and women farmers in spreading botanical pesticides across 12 villages in Bogra District, north-western Bangladesh. We conducted ex ante and ex post surveys among farmers from November 2009 to September 2010. For data analysis, we used t-test and McNemer and Wilcoxon sign rank tests. Our findings suggest that video improves the ability of both male and female farmers to communicate about pest management among themselves and with other stakeholders, as ‘intricate ethno-agricultural practices’. Video-mediated learning sessions are more effective than conventional workshop training in enhancing farmers’ knowledge about botanical pesticides, changing their attitude and finally taking a decision to adopt these methods. In other words, video is capable of communicating complex issues such as the biological and physical processes that underlie pest management innovations. From our case, we conclude that agricultural extension is more effective with the use of facilitated video learning and that this process clarifies complex agro-ecological principles, bias and normative perceptions of the learners. Also, video-mediated learning is not only transferable across villages, but also works well in combination with other media, such as radio, television and mobile phones.     

Does dispositional mindfulness moderate how individuals engage in their passions? An investigation into video games

ABSTRACT

The Dualistic Model of Passion (DMP) is an emerging framework in social psychology that assesses individuals’ passion for an activity. Although a passion parallels the definition for a serious leisure activity, the DMP further differentiates between a harmonious (HP) versus an obsessive (OP) passion, which are associated with adaptive versus maladaptive outcomes, respectively. Building on recent research in the area of mindfulness and the growing interest in problem video gaming, the present study explores the effect of dispositional mindfulness on reports of HP and OP. An online sample of adult video game users (N = 1,124; 68.95% male) completed assessments of their passion for video gaming as well as their dispositional mindfulness. Results revealed a negative association between dispositional mindfulness and OP for video gaming, but no association between dispositional mindfulness and HP for video gaming. Further, a moderation effect was found such that high dispositional mindfulness appears to protect against internalizing an OP for video gaming. Finally, results from a latent profile generally supported the role dispositional mindfulness plays in reducing the severity of OP for video gaming. The implications for theory and positive video game engagement are discussed.     

一种基于快速搜索的视频时域差错隐藏算法

为了克服视频传输中因传输差错引起的视频质量下降,提出一种基于快速搜索的边框匹配时域隐藏算法(CSBM)。该算法针对时域差错隐藏的运动矢量恢复问题,利用边框匹配算法改善被恢复的物体边缘模糊的情况;采用基于中心偏置的快速搜索样式得到最小边界匹配差值的候选运动矢量,减少了解码器差错恢复的计算复杂度。实验结果显示,针对不同性质的序列,该算法与边界匹配算法(SMA)、棱形搜索的边界匹配法(DSSM)等典型差错隐藏方法相比,平均搜索点数可减少12.5~19个点,亮度分量的峰值信噪比(PSNR)能改善0.93~1.55 dB,证明该算法能获得更好的差错隐藏效果,并减少了运算量。