Under construction
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 Under construction Packet: Although computers and modems can send data one character at a time, it’s more efficient to send information in larger blocks called data “packets,” or datagrams. When using the standard Internet protocol, TCP/IP, packets are typically around 1,500 characters. Packets consist of the data being transmitted plus the IP address information of the sender and the recipient. PAL: Phase-alternating line television standard popular in most European and South American countries. PAL uses an interlaced display with 50 fields per second, 25 frames per second. Pixel: An abbreviation for picture element. The minimum computer display element, represented as a point with a specified color and intensity level. One way to measure image resolution is by the number of pixels used to create the image. Player: In a multimedia architecture, the client soft-ware application, typically a plug-in, that enables play-back of the media Plug-in: A plug-in extends the capabilities of a Web browser, enabling the client to display or playback a file type which the browser itself cannot handle. Pre-processing: Sometimes called optimizing, pre-processing removes non-essential information from your video and audio information that is difficult to encode and or does not substantively add to the quality of the streamed media. So pre-processing prior to encoding reduces the burden on the compressor, potentially saving time and CPU capacity. Post-production: The phase of a film or video project that involves editing and assembling footage and adding effects, graphics, titles, and sound. Pre-production: The planning phase of a film or video project usually completed prior to commencing production. Production: The phase of a film or video project comprised of shooting or recording raw footage. Progressive download: Also known as pseudo-streaming, “progressive download“ allows end-users to experience media accessed via a network such as the Internet, while the media file is still in the process of downloading; as opposed to downloadable media, which cannot be played back until the entire file is received. Unlike true streaming, progressive download leaves a copy of the media file on the client. Progressive download is also called HTTP streaming because Web server software using standard protocols (HTTP servers) can deliver progressive download files, unlike true streaming, which takes advantage of the special protocols used by media server software to adjust transmission to match the actual available bandwidth. Protocol: A formal description of, i.e., rules for, how specific types of computer systems interact. Pseudo-streaming: See progressive download. Glossaire (PDF : 168 ko) |
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