Comparison of Debris Flow Characteristics Obtained by Using Video Materials and Modeling

Velocity of debris flow is one of the most important characteristics for the protective construction design. Since debris flows are rare events, and observations are conducted only on stations in Russia, Ukraine, Italy, Switzerland, USA, China, Japan and New Zealand, the velocity is calculated rather than measured. Nowadays, a large number of videos with passing debris flows have appeared on the Internet. Scientists can use such video materials to obtain qualitative and quantitative characteristics of the debris flow. Therefore, the aim of our research is an attempt to measure the debris flow velocity using video materials and compare the obtained results with the calculated values using various methods. The debris flow that came down in Firgen, Austria on August 4, 2012 was chosen as the object of our study. The video was carried out from several angles, so it was possible to select a section of the channel, through which we could measure the debris flows waves velocity. In addition, we calculated the velocities of waves by formulas adopted in the regulatory documents and compared with the measured by video values. During the video analysis, debris flow velocities at different sites were observed: minimum—7.2 m/s and maximum—10 m/s. The calculated values varied from 4.5 m/s to 11.4 m/s. Moreover, we applied model of the transport-shear process of debris flow formation developed by Yu. B. Vinogradov. When we were comparing the obtained debris flow discharges with results from Austrian colleagues, we found out that the values were similar to each other. However, internal scatter in the model changed from 151 to 190 m3/s, while in the report of Austrian colleagues the discharges were from 80 to 250 m3/s.

Audio Description for Educational Videos on COVID-19 Response:A Corpus-Based Study on Linguistic and Textual Idiosyncrasies

Audio description(AD),unlike interlingual translation and interpretation,is subject to unique constraints as a spoken text.Facilitated by AD,educational videos on COVID-19 anti-virus measures are made accessible to the visually disadvantaged.In this study,a corpus of AD of COVID-19 educational videos is developed,named“Audio Description Corpus of COVID-19 Educational Videos”(ADCCEV).Drawing on the model of Textual and Linguistic Audio Description Matrix(TLADM),this paper aims to identify the linguistic and textual idiosyncrasies of AD themed on COVID-19 response released by the New Zealand Government.This study finds that linguistically,the AD script uses a mix of complete sentences and phrases,the majority being in Present Simple tense.Present participles and the“with”structure are used for brevity.Vocabulary is diverse,with simpler words for animated explainers.Third-person pronouns are common in educational videos.Color words are a salient feature of AD,where“yellow”denotes urgency,and“red”indicates importance,negativity,and hostility.On textual idiosyncrasies,coherence is achieved through intermodal components that align with the video’s mood and style.AD style varies depending on the video’s purpose,from informative to narrative or expressive.

访森海塞尔中国内地地区专业音频Audio for Video销售负责人贾毅阳及诺音曼中国内地地区销售负责人储海涛

BIRTV2023期间,在中央广播电视总台展台《现代电视技术》现场访谈间,本刊对森海塞尔中国内地地区专业音频Audio for Video销售负责人贾毅阳以及诺音曼中国内地地区销售负责人储海涛进行了采访,采访围绕两个品牌的产品亮点、优势及市场定位等话题展开。曹徐洋:在今年的BIRTV展会上,森海塞尔和诺音曼的展台都展出了大量优秀的产品,这些产品里有哪些是重点推出的?请介绍一下它们的主要亮点。

How Do Patients Prefer to Receive Patient Education Material about Treatment, Diagnosis and Procedures? <br/>—A Survey Study of Patients Preferences Regarding Forms of Patient Education Materials;Leaflets, Podcasts, and Video

Aim: The aim of this study was to explore patients’ preferences for forms of patient education material, including leaflets, podcasts, and videos;that is, to determine what forms of information, besides that provided verbally by healthcare personnel, do patients prefer following visits to hospital? Methods: The study was a mixed-methods study, using a survey design with primarily quantitative items but with a qualitative component. A survey was distributed to patients over 18 years between May and July 2020 and 480 patients chose to respond. Results: Text-based patient education materials (leaflets), is the form that patients have the most experience with and was preferred by 86.46% of respondents;however, 50.21% and 31.67% of respondents would also like to receive patient education material in video and podcast formats, respectively. Furthermore, several respondents wrote about the need for different forms of patient education material, depending on the subject of the supplementary information. Conclusion: This study provides an overview of patient preferences regarding forms of patient education material. The results show that the majority of respondents prefer to use combinations of written, audio, and video material, thus applying and co-constructing a multimodal communication system, from which they select and apply different modes of communication from different sources simultaneously.

VB环境下Audio/Video压缩数据流播放技术的应用

介绍了在 Windwos操作系统中 ,利用 VB自身条件和原有控件 ,灵活调用 Windows下的动态链接库开发

Real-time Audio &Video Transmission System Based on Visible Light Communication

With the increasing popularity of solid sate lighting devices, Visible Light Communication (VLC) is globally recognized as an advanced and promising technology to realize short-range, high speed as well as large capacity wireless data transmission. In this paper, we propose a prototype of real-time audio and video broadcast system using inexpensive commercially available light emitting diode (LED) lamps. Experimental results show that real-time high quality audio and video with the maximum distance of 3 m can be achieved through proper layout of LED sources and improvement of concentration effects. Lighting model within room environment is designed and simulated which indicates close relationship between layout of light sources and distribution of illuminance.

Integrating Audio-Visual Features and Text Information for Story Segmentation of News Video

Video data are composed of multimodal information streams including visual, auditory and textual streams, so an approach of story segmentation for news video using multimodal analysis is described in this paper. The proposed approach detects the topic-caption frames, and integrates them with silence clips detection results, as well as shot segmentation results to locate the news story boundaries. The integration of audio-visual features and text information overcomes the weakness of the approach using only image analysis techniques. On test data with 135 400 frames, when the boundaries between news stories are detected, the accuracy rate 85.8% and the recall rate 97.5% are obtained. The experimental results show the approach is valid and robust.

Content-Based Hierarchical Analysis of News Video Using Audio and Visual Information

A schema for content-based analysis of broadcast news video is presented. First, we separate commercials from news using audiovisual features. Then, we automatically organize news programs into a content hierarchy at various levels of abstraction via effective integration of video, audio, and text data available from the news programs. Based on these news video structure and content analysis technologies, a TV news video Library is generated, from which users can retrieve definite news story according to their demands.

Study on an Audio and Video Network Monitoring System for Weather Modification Operation

An audio and video network monitoring system for weather modification operation transmitting information by 3G, ADSL and Internet has been developed and applied in weather modification operation of Tai＇an City. The all-in-one machine of 3G audio and video network highly integrates all front-end devices used for audio and video collection, communication, power supply and information storage, and has advantages of wireless video transmission, clear two-way voice intercom with the command center, waterproof and dustproof function, simple operation, good portability, and long working hours. Compression code of the system is transmitted by dynamic bandwidth, and compression rate varies from 32 kbps to 4 Mbps under different network conditions. This system has forwarding mode, that is, monitoring information from each front-end monitoring point is trans- mitted to the server of the command center by 3G/ADSL, and the server codes＇and decodes again, then beck-end users call images from the serv- er, which can address 3G network stoppage caused by many users calling front-end video at the same time. In addition, the system has been ap- plied in surface weather modification operation of Tai＇an City, and has made a great contribution to transmitting operation orders in real time, monitoring, standardizing and recording operating process, and improving operating safety.

audio和video

电视上看到一则某种牌子的电器之广告,内中有audio和video两个字,借贵刊一角谈一谈。不用说,这两个字都是和电器有关的。audio与“音”有关系,video则和“影”有关。 audio是指由声音、机械、或电力所造成的频率(audio frs-quency),具有这种频率的声波每秒钟振动十五至二万次,也就是所谓低周波,是人类所能听得见的。在电器制品中,andio 特指电唱机、收音机或电视机的发音部分,平常人们所说的音响设备就叫audio equipment。因此,audio现用来泛指一般与音响有关的东西。

Stylistic Analysis of Internet News——Taking Internet Video Newsand Internet Audio News as Examples

With the rapid development of Internet around the world, network is transmitting all kinds of information to human beings nowadays. Net news, also called cyber news is affecting people’s expression of daily English. A large number of cyber words, phrases even sentences, which are different from conventional English, are formed and become popular in the cyber world. This paper discusses different markers of net news by taking Internet video news and Internet audio news as examples so that the readers can fully understand the properties of net news.

跃威USB VIDEO AUDIO延长器

亲爱的,俺把电脑延长了科技的发展有时候总会让人措手不及。当我还在犹豫到底是否需要斥“巨资”购买一台HDTV的时候,发现只需要用USB VIDEO AUDIO延长器就可以把书房的电脑延伸到客厅中,—切问题都迎刃而解了。

基于NBVTH算法的军用窄带信道视频传输研究

随着信息技术快速发展,音视频传输广泛应用在军民用领域。针对军用环境通信传输带宽窄、电磁干扰强、网络稳定性低等特点,迫切需要对军用窄带信道下音视传输频编码进行优化。介绍了适应军用窄带信道传输的视频编码框架和最新技术,提出了基于HEVC标准优化的窄带视频传输(NBVTH)算法,并在压缩比、压缩图像质量、编码时延等关键技术指标方面,将NBVTH算法与常用的H.264/AVC编码进行了性能对比分析。试验结果表明,NBVTH算法明显提升了编码性能,更加适用于军用窄带信道的视频传输。

作为“事件性媒介”的监控录像短视频——以事件现象学为视域

监控录像短视频作为视频监控技术与短视频耦合的新型媒介形态,并不能被简单地归为一种监视媒介。以海德格尔、马里翁等的事件现象学为理论透镜,融贯伊德、克莱默尔的技术/媒介中介论,监控录像短视频更应被视为一种直观、原初地呈现事件的“事件性媒介”。在媒介本体层面上,监控录像短视频可以被规定为一种由“事件—媒介—主体”的三元关系构成的“事件媒介”,依靠监控摄像头的“全时空”部署与短视频的媒介渠道,实现对事件的接收与生成,为主体的在世生存提供了“超越的可能性”。监控录像短视频同时还是“媒介事件”的现实建构装置,它以物质性的事件为中介来实行“常识世界”的再生产,敞开了社会现实建构的实在性与开放性。

天津市地震局应急视频会议系统组网研究

为全面提升地震应急指挥能力和协同应急通讯效率,天津市地震局应急指挥大厅基于跨网段多层级视频融合技术完善天津市地震应急视频指挥调度网络,构建“平战结合”双模式。通过探究跨网段通讯、多层级音视频信号转发、多点控制单元(MCU)级联等技术,实现天津局与中国局、市政府、市应急管理局以及辖区内各应急视频节点互连互通,为天津市地震应急快速响应提供高效的通信保障。

面向视频会议的音频辅助视频编码方法

目前视频会议所包含的视频和音频通常是使用传统的编码标准分别进行压缩。然而从语义层面看,音频和视频存在强相关性,都是对与会者所要表述内容的表征。因此,对两者分开编码是次优的。针对此问题,提出了一种音频辅助的视频编码框架。该框架中视频只传输少量的关键帧以提供必要的纹理参考,利用从重建音频中推理得到时序信息和关键帧来重建其余帧。实验结果表明,与通用视频编码方法相比,该框架在指标DISTS下取得了-89.81%的BD-rate结果。