videoconferencing, conduct of a videoteleconference, telecommunicationtechnologies, allow, simultaneous two-way video and audio transmissions, 'visual collaboration', a type of groupware,
videophone calls, designed, multiple locations rather than individuals, relatively low cost, high capacity broadband telecommunication services, coupled with powerful computing processors and video compression techniques, significant inroads in business, education, medicine and media, long distance communications technologies, reducing, together, contributes to reductions in carbon emissions, thereby global warming, the core technology, digital compression of audio and video streams in real time, the hardware or software, compression, called a codec (coder/decoder), other components required include, video input, video camera or webcam, video output, computer monitor, television or projector, audio input, microphones, CD/DVD player, cassette player, other source of PreAmp audio outlet, audio output, usually, loudspeakers associated with the display device or telephone, data transfer, analog or digital telephone network, LAN or Internet, computer, a data processing unit, ties together the other components, compressing and decompressing, initiates and maintains the data linkage via the network, basically two kinds of videoconferencing systems, dedicated systems, required components packaged into a single piece of equipment, a console with a high quality remote controlled video camera, PTZ cameras, contains all electrical interfaces, the control computer, and the software or hardware-based codec, omnidirectional microphones, loudspeakers and/or a video projector, several types of dedicated videoconferencing devices,portable, non-portable, expensive devices, used for auditoriums, smaller, less expensive devices, cameras, microphones and loudspeakers integrated into the console, hardware boards, videoconferencing devices, a range of different cameras and microphones, necessary codec and transmission interfaces,H.323 standard, via dispersed PCs,videoconferencing modes, Voice-Activated Switch (VAS), Continuous Presence,
MCU switches, a conference loudest voice,other participants, multiple participants, at the same time, the streams, a single video image,images to all participants, typically, called, vary,echo cancellation, a fundamental feature of professional videoconferencing systems,Acoustic Echo Cancellation (AEC), wave interference, an algorithm, to detect, sounds or utterances reenter the audio input of the videoconferencing codec, time delay, lead, the remote party hearing their own voice,significantly delayed, strong reverberation, howling created by feedback, a processor-intensive task,descriptive names and terminology,differ,however, distinction, increasingly blurred with technology improvements, such as, sophisticated software clients,multiple parties on a call, in general, everyday usage, frequently used instead of videocall,both videophone calls and videoconferencing, Webcams, popular, relatively low cost devices, provide live video and audio streams via personal computers, generally higher cost,videophone, deploys greater capabilities, allows, via live, simultaneous two-way video and audio transmissions, accomplished, a centralized distribution and call management system, a similar non-centralized multipoint capability embedded in each videoconferencing unit, again, technology improvements, circumvented traditional definitions, multiple party videoconferencing via web-based applications, a telepresence system, high-end videoconferencing system, service usually employed by enterprise-level corporate offices, telepresence conference rooms, use state-of-the art room designs, video cameras, displays, sound-systems and processors, coupled with high-to-very-high capacity bandwidth transmissions, various technologies described above, basis,deaf Video Relay Service,diagnostic and rehabilitative use or services, utilizing videocalling and videoconferencing, teachers and psychologists, conducting online sessions, personal videocalls to inmates, incarcerated in penitentiaries and videoconferencing, to resolve airline engineering issues, at maintenance facilities, evolving on-going basis, synchronous conferencing,computing, in particular, in computer-mediated communication, collaboration and learning, to describe technologies informally known as online chat,instant messaging systems, provide a text-basedmulti-user chat function, synchronous, to qualify, distinct,online chat,text messages, sender to receiver,to respond quickly, thereby, created, distinguishes,Internet forums and email, address point-to-point communications, as well as,multicast communications, receivers, feature of a web conferencing service,the expression,means "informal conversation",web-based applications, directly addressed, anonymous,a multi-user environment, specific online service, a web server controlled by the vendor
