Apple QuickTime Technical Information download pdf (Page 73)

Glossary 73

hinting A process that creates a track for each streamable media track in the file that

tells QuickTime Streaming Server how and when to deliver each frame of media. The

hinting process performs the required calculations in advance, allowing QTSS to serve

up a larger number of streams. Hinting also allows new codecs to be used without the

need to upgrade the server.

HTML Hypertext Markup Language. The set of symbols or codes inserted in a file to be

displayed on a World Wide Web browser page. The markup tells the web browser how

to display a webpage’s words and images for the user.

HTTP Hypertext Transfer Protocol. The client/server protocol for the World Wide Web.

The HTTP protocol provides a way for a web browser to access a web server and

request hypermedia documents created using HTML.

IEEE Institute of Electrical and Electronics Engineers, Inc. An organization dedicated to

promoting standards in computing and electrical engineering.

Instant On In QuickTime streaming, an advance in Apple’s patent-pending Skip

Protection technology that dramatically reduces buffer, or wait, time for an

instantaneous viewing experience with streaming video on a broadband connection.

IP Internet Protocol. Also known as IPv4. A method used with Transmission Control

Protocol (TCP) to send data between computers over a local network or the Internet. IP

delivers packets of data, while TCP keeps track of data packets.

IP address A unique numeric address that identifies a computer on the Internet.

IP subnet A portion of an IP network, which may be a physically independent network

segment, that shares a network address with other portions of the network and is

identified by a subnet number.

ISP Internet service provider. A business that sells Internet access and often provides

web hosting for ecommerce applications as well as mail services.

JavaScript A scripting language used to add interactivity to webpages.

key frame A sample in a sequence of temporally compressed samples that doesn’t rely

on other samples in the sequence for any of its information. Key frames are placed into

temporally compressed sequences at a frequency that’s determined by the key frame

rate.

key frame rate The frequency with which key frames are placed into temporally

compressed data sequences.

LAN Local area network. A network maintained within a facility, as opposed to a WAN

(wide area network) that links geographically separated facilities.

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Apple QuickTime Technical Information Page 73