The Digital Signage Technologist

MPEG-4

MPEG-4 is an advancement over the MPEG-2. The new standard has the advantage that good quality video can be properly encoded at relatively low bit rate. MPEG-4 is the basis of the DivX codec, one of the most popular video format used on the Internet.

MPEG-4 is widely used on the Internet for its efficiency in transporting over the network. MPEG-4 video is often encoded at 1 to 2 Mbps, or 1/8 to 1/4 MB per second (128 to 256 kbps). A 1 GB memory card easily holds 1 hour of MPEG-4 video. Transmitting a 1-minute MPEG-4 content on the 512 kbps xDSL takes 30 to 60 seconds. This makes frequent content updates feasible.

To be continued…