Medianet Reference Guide - Cisco

Chapter 1
Medianet Architecture Overview
Solution
Figure 1-5
Compression Ratios for HD Video Applications
1920 lines of Vertical Resolution (Widescreen Aspect Ratio is 16:9)
1080 lines of Horizontal Resolution
2,073,600 pixels per frame
x 3 Bytes of color info per pixel
x 8 bits per Byte
x 30 frames per second
= 1.5 Gbps per screen (uncompressed)
A resulting stream of 5 Mbps represents an applied compression ratio of 99%+
Traditional network designs supporting data applications may have targeted packet loss at less than
1-2%. For VoIP, network designs were tightened to have only 0.5-1% of packet loss. For media-ready
networks, especially those supporting high-definition media applications, network designs need to be
tightened again by an order of magnitude, targeting 0-0.05% packet loss.
However, an absolute target for packet loss is not the only consideration in HA network design. Loss,
during normal network operation, should effectively be 0% on a properly-designed network. In such a
case, it is generally only during network events, such as link failures and/or route-flaps, that packet loss
would occur. Therefore, it is usually more meaningful to express availability targets not only in absolute
terms, such as