What is MPEG 2?
MPEG 2 describes a combination of lossy video and audio data compression methods. MPEG 2 supposes compression of the raw frames into three kinds of frames: intra-coded frames (I-frame), predictive-coded frames (P-frames), and bidirectionally-predictive-coded frames (B-frames). This format defines 4 profiles and 4 levels that correspond to the quality and resolution.
What is MPEG 2 designed for?
MPEG-2 was the second of several standards developed by the Moving Pictures Expert Group in 1994. MPEG-2 enlarged the basic MPEG system in order to maintain TV quality compression of digital video transmission.
What are MPEG 2 special features?
- compresses data into small bits that are easily transmitted and then decompressed
- supports both interlaced and progressive video
- supports up to 5 audio channels including surround sound
- may contain GUI, interaction, encryption, data transmission
- uses temporal and spatial redundancy during the compression process
What are MPEG 2 advantages?
- allows storage and transmission of movies using currently available storage media and transmission bandwidth
- better coding quality at higher data rates in comparison with MPEG 1
- often used to create movies to be distributed over the internet
- offers resolutions of 720x480 and 1280x720 at 60 fps, full CD-quality audio
- significant requirements for computer encoding
Where it can be applied?
MPEG-2 is widely used in cable and satellite TV broadcasting systems. Wide range of devices like TV stations, TV receivers, DVD players support this standard. Programs that support an MPEG 2 files include Microsoft Windows Media Player, Apple QuickTime Player and most other video players on Microsoft Windows, Linux or Mac.