Chapter 1 Introduction

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Chapter 1 Introduction 1.1 About Project We as the part of 21st century have reached the advance form of information processing & distribution system. And we are growing with the spreading era of internet and updating every aspect of our lives. Video Conferencing & Streaming is all about creating Live and On-Demand Web-based Video/Audio Presentations with synchronized content slides of all types, including PowerPoint slides, Flash animations, images (JPG and GIF), Adobe PDF documents, web page
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    Chapter 1Introduction 1.1 About Project We as the part of 21 st century have reached the advance form of information processing& distribution system. And we are growing with the spreading era of internet andupdating every aspect of our lives.Video Conferencing & Streaming is all about creating Live and On-DemandWeb-based Video/Audio Presentations with synchronized content slides of all types,including PowerPoint slides, Flash animations, images (JPG and GIF), Adobe PDFdocuments, web page links, and links to any other type of electronic file or document for online lectures and presentations. We can reach more people at times that are moreconvenient for them and make lectures and presentations available both Live and on-demand thus providing flexibility to receive the information at various times in various places.Live and On-Demand Web-based Video/Audio Presentations with synchronizedcontent slides on PowerPoint, Flash animations, images (JPG and GIF), Adobe PDFdocuments, web page links, and links to any other type of electronic file or document todeliver online lectures and presentations has brought about a tremendous boom of Videoconferencing and Streaming over the time. Web and video conferencing technology is becoming more sophisticated with each passing day. A few years ago it was a novelty just to talk with someone online, and view his or her image at the same time. How youmight benefit from the latest developments in web conferencing depends on your  particular needs.If you wish to use conferencing as a service tool and want to avoid having to send outyour service team on physical visits to clients, you can save a lot of travel time and cost by selecting a web and video conferencing system that allows the host of the conferenceto go online and actually take control of the computer of the client or conference participant. If you are looking at web conferencing as an after-sales service tool, then this particular feature will probably give you one of the most important benefits that youcould wish for.Today’s businesses—large and small—need easy to operate, affordablesystems for security surveillance, production monitoring, and advanced applications likemonitoring quality of service and point of sale transactions. These enterprises want morefrom their CCTV systems—integration of existing equipment like analog cameras, securestorage, and the ability to monitor and manage their systems anytime from anywhere.And the system should be based on a technology that’s future-proof and will last for 1  Fig.1years to come. We can access real-time video at any time from any computer anywhere.Axis network video products provide an easy way to capture and distribute high qualityvideo over any kind of IP network or the Internet. The video can be stored at remotelocations for convenience and security, and the information can be transported over theLAN or Internet. This means that even companies with several offices across the worldcan make effective use of a network video solution for security surveillance and remotemonitoring purposes.Almost every department in your organization can benefit from online meeting andcollaboration technology. Bringing visual communication to everyday conversationsincreases customer satisfaction and reduces customer acquisition expenses and positivelyimpacts your bottom line. Hundreds of companies, government departments, universitiesand home businesses use PC Video Conference for online video meetings everyday.Consider the following examples: ã A sales professional qualifies prospects more quickly, reduces the sales cycle andcloses more deals by conducting online presentations and product demonstrationswith prospective customers. ã A development team creates and revises a project plan, then schedules asubsequent online meeting with others for additional input. ã A financial group reviews sensitive data with group members, clients, employees,investors and financial analysts.2  ã A trainer educates new customers located in different geographic regions about a products latest features and documentation without traveling. ã A sales manager can conduct meetings for all local or out of state (country) sales people without the costs associated with pulling them off the road or occurringassociated travel and venue costs. Fig.2 Fig.3A videoconference (also known as a video teleconference) is a set of interactivetelecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously.Fig.4It has also been called visual collaboration and is a type of groupware. It differs fromvideophone in that it is designed to serve a conference rather than individuals.The core technology used in a video teleconference (VTC) system is digital compressionof audio and video streams in real time. The hardware or software that performscompression is called a codec (coder/decoder). Compression rates of up to 1:500 can beachieved. The resulting digital stream of 1's and 0's is subdivided into labeled packets,which are then transmitted through a digital network of some kind (usually ISDN or IP).The use of audio modems in the transmission line allow for the use of POTS, or the Plain3  Old Telephone System, in some low-speed applications, such as video telephony, becausethey convert the digital pulses to/from analog waves in the audio spectrum range. Theother components required for a VTC system include:* Video input: video camera or web cam* Video output: computer monitor, television or projector * Audio input: microphones* Audio output: usually loudspeakers associated with the display device or telephone* Data transfer: analog or digital telephone network, LAN or InternetThere are basically two kinds of VTC systems:1. Dedicated systems have all required components packaged into a single piece of equipment, usually a console with a high quality remote controlled video camera. Thesecameras can be controlled at a distance to pan left and right, tilt up and down, and zoom.They became known as PTZ cameras. The console contains all electrical interfaces, thecontrol computer, and the software or hardware-based codec. Omni directionalmicrophones are connected to the console, as well as a TV monitor with loudspeakersand/or a video projector. There are several types of dedicated VTC devices:1. Large group VTC are non-portable, large, more expensive devices used for largerooms and auditoriums.2. Small group VTC are non-portable or portable, smaller, less expensive devices usedfor small meeting rooms.3. Individual VTC are usually portable devices, meant for single users, have fixedcameras, microphones and loudspeakers integrated into the console.2. Desktop systems are add-ons (hardware boards, usually) to normal PC's, transformingthem into VTC devices. A range of different cameras and microphones can be used withthe board, which contains the necessary codec and transmission interfaces. Most of thedesktops systems work with the H.323 standard. Video conferences carried out viadispersed PCs are also known as e-meetings. Point-to-Point Video Conferencing Fig.54
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