start with a handy reference list of terms that are helpful to understand when
dealing with managing and converting files, and will make reading this article
easier for those new to all this video file stuff.
Also spelled bit rate. Defines how much physical space a second of audio or
video takes in bits. Some of you are probably still wondering what the hell
that means…well, it means this: Bitrate is the amount of Bits transferred in a
second by a digital device. So the higher the Bitrate is, the more information
that gets transferred which usually makes for higher quality in a video or
Home Theater Personal Computer. Need I say more? I sure hope not.
Short for Personal Video Recorder. A device that records video similar to a
VCR. A PVR utilizes digital video recording unlike a VCR which is analog.
Examples of PVR: TIVO and ReplayTV
Constant Bit Rate. CBR encoding means that the file gets encoded with a
constant Bitrate. These types of files are usually represented by constant file
sizes and file quality.
Variable Bit Rate. VBR encoding ensures high quality because of bit allocation
decisions during encoding. This means the Bitrate varies depending of the
complexity of the file at that second.
Video Compact Disc. This is somewhat similar to the DVD. It isn’t as widely
implemented in North America as it is in Asia.
The standard was formed in 1993 by a group of Japanese electronics
manufacturers. It uses the MPEG 1 file format at a constant bit rate. This
quality is roughly similar to VHS quality.
Super Video Compact Disk. This is an enhanced version of the VCD format that
uses constant or variable Bitrate with an MPEG 2 format.
Digital Versatile/Video Disc. A newer version of the Compact Disc which can
hold about 4.7 Gigabytes or more. It is usually used to store MPEG 2 format.
VOB: Video Object. This is the data file used in the
DVD format to deliver video, audio and graphics.