Glossary
© 2013 Harmonic Inc.
395
Ellipse 3000 r.3.0, Rev. B
SMB
Audio adapter (incorporated on the main board) used in the early MV family of encoders. It
can compress two stereo pairs of either analog or digital audio into either MPEG-1 layer II or
Dolby Digital (AC-3) formats.
SMC
Server Management Console.
SMP
Session Management Protocol.
SMPTE
Society of Motion Picture and Television Engineers, primary creator of motion imaging
standards for TV, digital cinema, and film.
SMPTE 333
Society of Motion Picture and Television Engineers – DTV closed-caption server to encoder
interface.
SMPTE 334-1
Society of Motion Picture and Television Engineers – Vertical ancillary data mapping of
caption and related data.
SMPTE 334-2
Caption Distribution Packet (CDP) Definition.
SNC
Single Node Cluster.
SNMP
Simple Network Management Protocol. The protocol that Harmonic control and
management systems use to configure and monitor Harmonic devices remotely over IP.
SNR
Signal-to-Noise Ratio. The ratio of the amplitude (power, volume) of a data signal to the
amount of noise (interference) in the line. It measures the clarity and quality of a
transmission channel or electronic device, usually in decibels.
SOAP
Simple Object Access Protocol.
Socket
An additional qualifying value for an IP address used by the UDP protocol.
Spatial activity
The amount of detail in each individual image, ignoring image-to-image changes or motion.