AVS DVD Player 2.4.2.125 - User Guide and FAQ

Frequently Asked Questions - AVS DVD Player

1. What are audio and video codecs?
   A video or audio Codec (COmpression/DECompression) is a software component allowing to encode data to be stored on a media (CD, DVD, etc...) and/ to decode it to be visualized or heard. There are also so-called "hard" codecs usually embedded to camcorders or digital video players or professional and semi-professional video cards for video editing and composing.
   
   
2. What is bit rate?
   Bit rate very often used when speaking of video or audio quality and file size - defines how much physical space one second of audio or video takes in bits (note: not in bytes). The higher the bit rate, the more times per second the original sound and video are sampled, thus yielding a more faithful reproduction and better sound and picture quality.
   
   
3. What is frame rate?
   In basic terms, a video can be thought of as being made up of numerous snapshots, called frames. Frame rate defines how many pictures i.e. frames one second of video or audio contains, normally used acronym for frame rate is fps - frames per second. Human eye can't see picture changes after the frame rate is more than ~24fps.
   Video files with higher frame rates show motion better but have larger file sizes. Typical frame rates are 29.97 for NTSC video (in American TV system), 25 for PAL (European system) video, and 24 for film.