OMVC – ATSC Mobile DTV Receiver Profile Guidelines
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algorithm of AVC video (ISO/IEC 14496-10) [1]. The allowable
parameters are bounded by the upper limits specified for the Main
Profile at Level 3.1.
See ATSC A/153 Part 7 AVC and SVC Video System
Characteristics.
OMA-BCAST
The Open Mobile Alliance
– BCAST is a standard that is for the
transmission of an electronic service guide for MDTV. The OMA-
BCAST standard was adopted with some modification as part of the
ATSC A/153 Mobile DTV Standard.
See ATSC A/153 Part 4 Announcement and
ATSC A/154 ATSC Mobile DTV Recommended Practice.
OTAG
OMVC Technical Advisory Group (OTAG) is the technical body of
the OMVC. It is made up representatives of the various broadcaster
members of the OMVC. OTAG works in conjunction with the OMVF
Forum, ATSC and other groups to further the ATSC MDTV
technology and system architecture.
Out of Band
Information that is delivered to MDTV receiver devices by the
interaction channel as opposed to the MDTV broadcast channel.
Typically this would include advanced ESG, long term encryption
keys and some file-based content.
Pause Only
Pause Only function on an MDTV receiver allows the viewer to go to
take a break while watching a real time linear program and then
resume watching at a later time. This mode requires the receiver to
have recordable memory that is capable of buffering program
content for a reasonable period of time e.g. >30 minutes.
SBR
Spectral band replication (SBR) is a technology that is part of the
HE-AAC v2.0 audio codec selected for inclusion by the ATSC A/153
Standard. It is based on harmonic redundancy in the frequency
domain. Some guidance information for reconstruction of the high-
frequency spectral envelope is transmitted as side information.
When the audio is encoded using SBR, the replicated audio will
sound “dull” due to the lack of high frequency information if SBR is
not implemented in the audio decoder.
See ATSC A/153 Part 8 HE AAC Audio System Characteristics
Scheduled DVR
An MDTV receiver feature that incorporates a digital recorder
function that is capable of being programmed to record a selected
MDTV program stream at a selected time without any assistance
once the information has been programmed.
Service/Audience
Measurement
The collection of service usage data such as channel watched,
duration of viewing, channel change activity, time of day for viewing
