GLOSSARY

Advanced Television Enhancement Forum (ATVEF) is a not-for-profit coalition establishing industry standard protocols for enhanced programming.

Back Channel (also known as return channel) is the physical path that the return signal can take from the set-top-box back to the broadcaster. Interactive TV users can transmit information back to the point of origination through the back channel.

Bandwidth refers to the amount of data that can be sent through a signal path.

DTV or digital TV is a system of transmitting and receiving digital television.

DVB are the initials of the Digital Video Broadcast Forum, an organization seeking to establish technical standards for digital television. They are responsible for DVB-RCC (Digital Video Broadcasting Return Channel through Cable), DVB-RCT (Digital Video Broadcasting Return Channel through Terrestrial)

Integrated receiver/decoder (IRD) is used to decode signals downloaded from satellite receivers.

Interactive Program Guide (IPG) can be customized to display available and favorite channels, program names and program descriptions.

Interactive Television (iTV) is an umbrella term referring to a range of interactive television services.

IP is short for Internet protocol; a means of sending packets of information over Internet networks.

MPEG-2 (Moving Picture Experts Group) is a version of the MPEG video file format used to deliver digital video.

Return Channel (also known as back channel) is the physical path that the return signal can take from the set-top-box back to the broadcaster. Interactive TV users can transmit information back to the point of origination through the back channel

Megahertz (MHz) or one million cycles per second, is a measure of frequency.

Metadata in the digital television context refers data about the programming, such as start and stop times, titles, and information on the following show.

Pay per view (PPV) available through cable and satellite distributors allows viewers to purchase programs, such as movies or sporting events.

Personal Video Recorder (PVR) allows the user to record, store and playback video such as television broadcasts from a hard drive.

Set-top-box (STB) is a device used with televisions, allowing users access to enhanced and sometimes proprietary features such as digital channels, video-on-demand, and Internet access.

T-Commerce refers to monetary transactions made over the television.
Vertical blanking interval (VBI) is the time it takes for the electron beam to jump from the bottom of a frame to the top of the next. This non-visible portion of the television signal can be used to carry data such as teletext, closed captioning and even html documents for set-top-boxes.

Video on Demand (VOD) uses server technology to allow users to purchase and watch programs of their choice.

 

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Introduction - Applications - Models - Impact - E-Commerce - Conclusion - Reference

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