Digital Video on the Move - A Practical Guide to Video and Audio Compression - page 441

Table 28-1 3GPP Format Specifications

File format 3GPP 3GPP2

Network type GSM CDMA2000

Video coding MPEG-4, H.263 MPEG-4, H.263

Audio coding AAC, AMR AAC, AMR, QCELP

Text coding 3G Text 3G Text

Physical file format QuickTime QuickTime

File extension

.3gp .3g2

28.6 Different Kinds of Networks

The mobile community supports a variety of different types of networks, depending on
your operator and where in the world you are using the device. Some networking tech-
nologies are used more widely than others. The more efficient the networking technology,
the larger the video payload you can deliver. Larger payloads mean better quality.
Table 28-2 lists several kinds of network technologies and suggests some bit rates
that might be appropriate as starting points for testing content on them.

Table 28-2 Mobile Network Technologies

Network 90 KB 300 KB

type Generation Bit rate Quality Resolution FPS duration duration

GSM 2G 9.6 Kbps Bad for n/a n/a n/a n/a

video

HSCD 2.5G 28 Kbps Good for 128 × 96 4 27 sec 90 sec

stills

GPRS 2.5G 24-50 Kbps Good for 144 × 120 6 19 sec 63 sec

stills

EDGE 3G 64-200 Kbps Good for 160 × 120 8 11 sec 37 sec

streaming

UMTS 3G 128-384 Kbps Excellent 174 × 144 10 5 sec 17 sec

Third Generation Partnership Project (3GPP): http://www.3gpp.org/
Third Generation Partnership Project 2 (3GPP2): http://www.3gpp2.org/