3-2 pulldown processing:
It is a process which has the ability to improve the quality of the video. This improvement is accomplished when it is converted to progressive scan.

AAC:
AAC is the abbreviation of Advanced Audio Coding. This AAC is the successor of AC3 coding but currently not many of the hardware and DVD players support this format.

Access time:
The time that  DVD drive takes to read a data track and resumes the transfer of data.

Aspect Ratio:
Aspect ratio refers to the ratio of the width to the height of the display area in the screen. Example 16:9, 4:3 etc.

Codec:
Coder is the COder/DECoder. It is a software which encodes a file such as audio or video to any format and decode the same to some other format back again. Several codecs are available such as MPEG, JPEG etc.

DOT:
DOT is the abbreviation of Digital Only Token. This DOT is the flag on the disc which has the ability to disable all the analog outputs but there may be several restrictions in the mere future for it.

Dolby Surround:
This is the standard for matrix encoding surround sound usually done by applying a set of pre defined mathematical functions and with surround channels with left and right channels also. Every DVD players are provided with this option in the current market.

DVD Up-Conversion:
The process of converting a DVD to higher output resolution is called DVD up conversion. Usually the conversion will be from 480i to 1080i. But it is restrictive to 480p due to licensing issues.

DVI:
DVI is the Digital Video Interface which provides an interface capable of connecting players and displays digitally. HDCP in DVI connections is optional.

Digital Video:
Digital video is the high quality video. These files have very large size usually in some Terabytes. So proper compression needs to be done with codecs such as MPEG, JPEG etc.

Forced display:
The forced display helps in the display of the subtitles in the DVD player. It is called forced display because even when the sub picture display mode is turned off the subtitles are displayed.

Frame:
The frame represents the source which builds up the video. A single frame represents one image. The combination of several frames form the video creates an illusion of movement that can be created with it. Usually a video runs at 24 frames per second.

FireWire:
This is officially called IEEE 1394 which is a high speed data transfer interface used on DVD players.

HDMI:
HDMI is the abbreviation of High Definition Multimedia Interface. These are similar to DVI but audio channels and HDCP can be added.

Hybrid:
Hybrid discs are the dual format discs which has the ability to support both old fashioned DVD and the recently developed HD DVD. These are also the dual layered discs.

HDTV:
HDTV is the High Definition Television as most of the LCD monitors of today are sported with. A HDTV must be able to display 720 vertical scanning lines in progressive (720p) or 1080 vertical scanning lines in interlaced mode (1080i).

HD DVD:
The High Definition DVD abbreviated as HD DVD offers very good surround sound and picture quality, this is similar to Blu-ray.

Interleaving:
Interleaving is the process of gluing the audio and video at specified points. The player recognizes the glued points and plays the video with proper synchronization.

Inverse Telecine:
The inverse telecine is a process that involves the extraction of 24 fps from a source of 29.978 fps.

Keyframe:
This is also a complete frame but in a compressed format for the reduction of size of the video.

Letterboxing:
The process of making the wide screen video or image to fit to a standard 4:3 aspect ratio by shrinking is called as letterboxing. Two horizontal bars are kept; one over the video and the other below. As a result, there will be a loss of vertical resolution of the image.

MPEG video:
MPEG video compression demonstrates that the video is compressed in the MPEG encoding system. They are of 2 types, MPEG-1 is used for the videos of low data rate and MPEG-2 used for the videos of high data rate.

MultiRead:
Multiread is a consortium being developed by Yokohama group which allows the companies to develop DVD players that will be able to develop to read both the CD and DVD of all formats.

Progressive scan:
The progressive scan is the inverse phenomenon of interlaced scan. In the progressive scan all the lines in a frame can be displayed in a single pass.

Scaler:
A video Scaler circuits has the ability to convert the video from one resolution to another.Usually the term upscalling is associated with it which is nothing but upconverting of a video signal from a low resolution to high resolution..

VC1:
VC1 is the Advanced Video Codec which is based on the Windows Media Video. Many of the HD DVD titles use this as it has the capability to offer best quality picture, less disk space and good quality support tool.