What are the scaleable modes of MPEG-2?

A. Scaleable video is permitted only in the High Profiles. Currently, there are four scaleable modes in the MPEG-2 toolkit.

These modes break MPEG-2 video into different layers (base, middle, and high layers) mostly for purposes of prioritizing video data. For example, the high priority channel (bitstream) can be coded with a combination of extra error correction information and/or increased signal strength (i.e. Higher Carrier- to-Noise ratio or lower Bit Error Rate) than the lower priority channel.

For example, in HDTV, the high priority bitstream (720 x 480) can be decoded under noise conditions were the lower priority (1440 x 960) cannot. This is part of the "graceful degradation concept. Breaking a video signal into two streams (base and enhancements) has a penalty, however.

Usually less than 1.5 dB. Another purpose of salability is complexity division. A standard TV set need only decode the 720 x 480 channel, thus requiring a less expensive decoder processor than a TV set ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.