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Due to its simplicity, Motion JPEG is a good choice for use in many applications. It ensures inexpensive equipment at the cost of slightly higher bandwidth consumption. For more efficient bandwidth usage, some of the true motion picture compression standards are preferred.
MPEG–1 can be more effective than MJPEG. However, at a slightly higher cost, MPEG–2 offers some advantages that provide better image quality -- comprising of frame rate and resolution -- but requires more network bandwidth consumption. It is also a more complex technique. MPEG–4 is developed to offer a compression technique for applications demanding less image quality and bandwidth. It is also able to deliver video compression similar to MPEG–1 and MPEG–2, with higher image quality and higher bandwidth consumption.
Since the H.261/H.263 recommendations are neither international standards nor offers any compression enhancements compared to MPEG, they are not of any real interest. Some definitions:
Interlaced – A technique used in old television system where the picture is divided into two half pictures containing every other line each. When displayed, first the odd lines are displayed then the even lines followed by the odd lines of the next picture and so on. This is the opposite of
Progressive Scan.
Progressive Scan – Each picture in the video sequence is the full picture displayed all in once. This is the opposite of Interlaced.
PAL – Phase Alternating Line. This is the standard for the analog television format used in Europe with 625 lines at 50 half-pictures per second, i.e. Interlaced video.
NTSC – National Television Standards Committee. This is the standard for the analog television format used in the US with 525 lines at near 60 pictures per second, i.e. Interlaced video.
HDTV – High-Definition Television. A standard for television of picture size 1920 ´ 1044 at 30 pictures per second.
MPEG – Motion Picture Experts Group. The committee responsible for developing the MPEG standards. Homepage at:
www.mpeg.telecomitalialab.com
Interesting comparison:
MPEG
1
2
4
Max bit rate (Mbps)
1,86
15
15
Picture width (pixels)
352
720
720
Picture height (pixels)
288
576
576
Picture rate (fps)
30
30
30
From this, there is an obvious question: See it?
WIDTH
