17. GLOSSARY
AAC
Advanced Audio Coding (AAC) is a lossy compression and encoding scheme for digital audio. Audio files that have been encoded with AAC generally achieves better sound quality than MP3 at similar bit rates.
Analog Audio
An electrical signal that directly represents sound. Compare this to digital audio which can be an electrical signal, but is an indirect representation of sound. See also “Digital Audio”.
Aspect Ratio
The width of a TV screen relative to its height. Conventional TVs are 4:3 (in other words, the TV screen is almost square); widescreen models are 16:9 (the TV screen is almost twice as wide as its height).
Blockbuster
Blockbuster is online service which you can rent or purchase movies and TV episodes streamed over the Internet. Blockbuster is only available in the United States.
Digital Audio
An indirect representation of sound by numbers. During recording, the sound is measured at discrete intervals (44,100 times a second for CD audio) by an
DNS Server
A server which translates Internet domain names into IP addresses.
Dolby Digital Plus
Dolby Digital Plus is the next generation digital audio compression technology developed as an extension to Dolby Digital.
Film Fresh
Film Fresh is online service which you can rent or purchase movies and TV episodes streamed over the Internet. Film Fresh is only available in the United States.
Gateway
IP address of the electronic devices (such as router) which provide Internet access.
HDMI (High-Definition Multimedia Interface)
A digital interface between audio and video source. It can transmit component video, audio, and control signal with one cable connection.
Hub
A device used for connecting multiple devices to the network.
IP Address
A set of numbers which are assigned to devices participating in a computer network.
LAN (Local Area Network)
A group of computer networks covering a small area like a company, school or home.
Netflix
Netflix is online movie rental service, offering online streaming to customers in the United States.
Pandora®
Pandora is a popular personalized Internet radio service. You can instantly listen to free personalized radio stations streamed over the Internet from Pandora. Pandora is only available in the United States.
PCM (Pulse Code Modulation)
The most common system of encoding digital audio, found on CD and DAT. Excellent quality, but requires a lot of data compared to formats such as Dolby Digital and MPEG audio.
Picasa
Picasa allows you to create your original
Router
A networking device which distinguishes the IP address assigned to each device and routing and forwarding information in the computer network.
Sampling Frequency
The rate which sound is measured by a specified interval to turn into digital audio data. The numbers of sampling in one second defines as the sampling frequency. The higher the rate, the better the sound quality.
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