CBT CBT Digital Broadcasting Standards 1 — Questions and Answers
Question 1: Which compression standard is used by ATSC 1.0 for digital television broadcasting in the United States?
- MPEG-2 (Correct answer)
- MPEG-4 AVC
- HEVC
- AV1
Correct answer: MPEG-2
ATSC 1.0 uses MPEG-2 video compression for over-the-air digital television broadcasting in the US.
Question 2: What modulation technique does ATSC 1.0 use for terrestrial broadcast transmission?
- OFDM
- 8-VSB (Correct answer)
- QAM
- COFDM
Correct answer: 8-VSB
ATSC 1.0 uses 8-VSB (8-level Vestigial Sideband) modulation for terrestrial over-the-air broadcasting.
Question 3: What is the maximum data rate of a single ATSC 1.0 6 MHz broadcast channel?
- 12 Mbps
- 19.39 Mbps (Correct answer)
- 25 Mbps
- 38 Mbps
Correct answer: 19.39 Mbps
An ATSC 1.0 channel provides approximately 19.39 Mbps of usable payload data rate within a 6 MHz channel.
Question 4: In ATSC standards, what does the term 'subchannel' or 'multicast' refer to?
- A backup transmission path
- Multiple program streams within one 6 MHz channel (Correct answer)
- A secondary audio track
- A closed captioning stream
Correct answer: Multiple program streams within one 6 MHz channel
Multicasting allows a broadcaster to carry multiple program streams simultaneously within a single 6 MHz ATSC channel.
Question 5: What generation of ATSC standard introduced support for HEVC video compression and mobile broadcasting?
- ATSC 1.0
- ATSC 2.0
- ATSC 3.0 (Correct answer)
- ATSC 4.0
Correct answer: ATSC 3.0
ATSC 3.0 (NextGen TV) introduced HEVC compression, OFDM modulation, and native IP delivery with mobile reception capability.
Question 6: Which table in MPEG-2 transport streams provides program-specific information (PSI) that lists all services in a multiplex?
- PAT (Program Association Table) (Correct answer)
- PMT (Program Map Table)
- CAT (Conditional Access Table)
- NIT (Network Information Table)
Correct answer: PAT (Program Association Table)
The PAT (Program Association Table) is the top-level PSI table that lists all programs and points to their respective PMTs.
CBT CBT Digital Broadcasting Standards 1
Which compression standard is used by ATSC 1.0 for digital television broadcasting in the United States?