Topic 3:Entertain Me- What To Buy? Flashcards
High-definition (HD)
The picture on a tv screen is made of lines of pixels. In a conventional TV there are 625 lines, which are refreshed 25 times per second. HD has either 720 or 1080 lines, so it produces a clearer, sharper picture.
HDTV
High-definition TV
HDMI
High definition multimedia interface. Required for connection devices to show high definition video
TB
Terabyte or 1000 gigabytes.
Blu-Ray
A disk that enables the recording, rewriting and playback of high definition video and the storing of large amounts of data. It has more than 5 times the storage capacity of a traditional DVD and can hold up to 25GB on a single-layer disk and 50GB on a dual-layer disk.
Download
Transfer of a file, eg a video, from a central computer to your computer.
Broadband
A high-speed connection to the internet
Bandwidth
The amount of data that can fit through an internet connection. You can compare it to a 10 lane motorway which can fit more cars than a 4 lane motorway. Bandwidth is measure in Bits per second (BPS) this indicates the number of Bits of information that can fit down the line in one second. KB or KBPS means 1000s of bits per second; MB or MBPS means million bits per second.
Upload
Transfer a file from your computer to a central computer. Eg your ISP
Firewall
A system designed to prevent unauthorised access to your computer when connected to a network such as the Internet
Spyware
Software that can be installed on your computer without your knowledge, which collects information about your logins and passwords and sends details to another computer on the internet.
IP (Internet Protocol) address
The personal address of your computer so that servers know where to send the information you have requested.
Encryption
For security, data is translated into a secret code according to a set of rules in a special ‘key’. To convert the data back into plain text, the receiver must also have the key. To convert the data back into plain text, the receiver must also have the key.
Copyright
Gives the creator of an original work exclusive rights regarding that work for a certain period of time, including it’s publication, distribution and adaptation.
Digital Tights Management (DRM)
Allows the copyright holder or the owner of the media control over the number of viewings, plays and copies, and even which devices the media can be played or viewed on. If you download a film from iTunes, you cannot burn it on to a DVD because of the DRM encoded in the film.
