Cisco Headend Digital Broadband Delivery System
![Cisco](https://files.manualsbrain.com/attachments/7380d0050044647c30f5c24bbbf5d0c0b6d9bb84/common/fit/150/50/faa183d287233c52228cfea3dbc2a127fe780f60564fcb0955d9c3d1cd23/brand_logo.png)
Glossary
78-745238-01 Rev D
183
transport stream
A data communications signal that is formatted in accordance with the protocol defined in the
MPEG-2 specification ISO IEC 13818. An MPEG transport stream can carry voice, video, or
data information. The MPEG data transmission protocol transports real-time data.
U
UNIX
An operating system that is less computer/server-specific than other operating systems.
UNIX is widely used in the telecommunications industry and by the Internet.
V
VOD
video-on-demand. The ability of a subscriber to select a program event and watch it within
moments of selection. VOD allows pausing and rewinding of the event.