SCTE Digital Video Engineering
Professional (DVEP) Certification Exam |
Complete Exam Prep, Practice Questions
& Expert Explanations 2026/2027
1. According to the Nyquist theorem, what must be the desired sampling rate?
A) At least equal to the maximum frequency
B) At least 2 times the maximum frequency
C) At least 4 times the maximum frequency
D) At least 10 times the maximum frequency
Answer: B) At least 2 times the maximum frequency
Rationale: The Nyquist theorem states that to accurately reconstruct a signal, the
sampling rate must be at least twice the highest frequency present in the signal.
2. How is the artifact blockiness (macroblocking) in MPEG-2 dealt with in MPEG-4?
A) By increasing the bit rate
B) Objects can be encoded and transmitted separately to the decoder
C) By using larger block sizes
D) By eliminating all block-based encoding
Answer: B) Objects can be encoded and transmitted separately to the decoder
Rationale: MPEG-4 addresses macroblocking artifacts by allowing video objects to be
encoded and transmitted independently, enabling more flexible decoding and better
handling of motion boundaries.
3. In the H.264/AVC main profile, what is the sample depth per Y, Cr, and Cb?
A) 6 bits
B) 8 bits
,C) 10 bits
D) 12 bits
Answer: B) 8 bits
Rationale: The H.264/AVC Main Profile uses 8-bit sample depth for each color
component (Y, Cr, and Cb).
4. Which are the layers of the MPEG-4 architecture?
A) Encoding, transmission, and display
B) Delivery, synchronization, and media
C) Compression, storage, and playback
D) Transport, demultiplexing, and rendering
Answer: B) Delivery, synchronization, and media
Rationale: The MPEG-4 architecture consists of three primary layers: delivery layer,
synchronization layer, and media layer.
5. How many bits per symbol does 256 QAM use in its constellation build?
A) 4 bits
B) 6 bits
C) 8 bits
D) 16 bits
Answer: C) 8 bits
Rationale: 256 QAM uses 8 bits per symbol because 2^8 = 256 constellation points.
6. What term describes images or parts of images that do not change over time in
MPEG-4?
A) Macroblocks
B) Sprites
C) Slices
D) I-frames
,Answer: B) Sprites
Rationale: In MPEG-4, sprites are static background images or parts of images that
remain unchanged over time, allowing for efficient coding by encoding them once and
reusing them.
7. Which two statements define the problem an MPEG profile will address?
A) Bit rate and frame rate
B) Code complexity and processing power
C) Resolution and color depth
D) Storage capacity and bandwidth
Answer: B) Code complexity and processing power
Rationale: An MPEG profile defines which coding tools are available, balancing code
complexity against the processing power required to decode the stream.
8. What is the current ISO/IEC standard for HEVC?
A) ISO/IEC 14496-10
B) ISO/IEC 23008-2
C) ISO/IEC 13818-2
D) ISO/IEC 11172-2
Answer: B) ISO/IEC 23008-2
Rationale: HEVC (High Efficiency Video Coding) is standardized as ISO/IEC 23008-2,
which defines the video coding layer and the High Efficiency Video Coding (HEVC)
standard.
9. Which of the following are MPEG-4 error resilience tools for transmitting video
over wireless and other impaired channels?
A) Re-synchronization markers
B) Data partitioning
C) Reversible VLC
D) All of the above
, Answer: D) All of the above
Rationale: MPEG-4 provides multiple error resilience tools including re-synchronization
markers, data partitioning, and reversible variable length coding (VLC) to improve
performance over error-prone channels.
10. In terms of encoding and multiplexing, what allows non-real time modification
of encoded digital MPEG-2 video streams?
A) Packetization
B) Modulating
C) Transrating
D) Remultiplexing
Answer: B) Modulating
Rationale: Modulating encoded digital MPEG-2 video streams enables non-real time
modification of the content while maintaining the integrity of the elementary stream.
11. Which statement describes I-frame flash or background breathing?
A) As panning speed increases, motion vectors become less accurate
B) I-frames are always compressed with maximum quality
C) Backgrounds are stable regardless of motion
D) Motion estimation always works perfectly
Answer: A) As panning speed increases, motion vectors become less accurate
Rationale: I-frame flash or background breathing occurs when panning speed causes
motion vectors to become less accurate, leading to visible compression artifacts.
12. How does the AVC multi-rate capability make adaptive bit rate transmission
possible?
A) By using fixed bit rates only
B) A video stream can switch to a lower bit rate when channel conditions degrade
C) By encoding all streams at maximum quality
D) By eliminating all rate control
Professional (DVEP) Certification Exam |
Complete Exam Prep, Practice Questions
& Expert Explanations 2026/2027
1. According to the Nyquist theorem, what must be the desired sampling rate?
A) At least equal to the maximum frequency
B) At least 2 times the maximum frequency
C) At least 4 times the maximum frequency
D) At least 10 times the maximum frequency
Answer: B) At least 2 times the maximum frequency
Rationale: The Nyquist theorem states that to accurately reconstruct a signal, the
sampling rate must be at least twice the highest frequency present in the signal.
2. How is the artifact blockiness (macroblocking) in MPEG-2 dealt with in MPEG-4?
A) By increasing the bit rate
B) Objects can be encoded and transmitted separately to the decoder
C) By using larger block sizes
D) By eliminating all block-based encoding
Answer: B) Objects can be encoded and transmitted separately to the decoder
Rationale: MPEG-4 addresses macroblocking artifacts by allowing video objects to be
encoded and transmitted independently, enabling more flexible decoding and better
handling of motion boundaries.
3. In the H.264/AVC main profile, what is the sample depth per Y, Cr, and Cb?
A) 6 bits
B) 8 bits
,C) 10 bits
D) 12 bits
Answer: B) 8 bits
Rationale: The H.264/AVC Main Profile uses 8-bit sample depth for each color
component (Y, Cr, and Cb).
4. Which are the layers of the MPEG-4 architecture?
A) Encoding, transmission, and display
B) Delivery, synchronization, and media
C) Compression, storage, and playback
D) Transport, demultiplexing, and rendering
Answer: B) Delivery, synchronization, and media
Rationale: The MPEG-4 architecture consists of three primary layers: delivery layer,
synchronization layer, and media layer.
5. How many bits per symbol does 256 QAM use in its constellation build?
A) 4 bits
B) 6 bits
C) 8 bits
D) 16 bits
Answer: C) 8 bits
Rationale: 256 QAM uses 8 bits per symbol because 2^8 = 256 constellation points.
6. What term describes images or parts of images that do not change over time in
MPEG-4?
A) Macroblocks
B) Sprites
C) Slices
D) I-frames
,Answer: B) Sprites
Rationale: In MPEG-4, sprites are static background images or parts of images that
remain unchanged over time, allowing for efficient coding by encoding them once and
reusing them.
7. Which two statements define the problem an MPEG profile will address?
A) Bit rate and frame rate
B) Code complexity and processing power
C) Resolution and color depth
D) Storage capacity and bandwidth
Answer: B) Code complexity and processing power
Rationale: An MPEG profile defines which coding tools are available, balancing code
complexity against the processing power required to decode the stream.
8. What is the current ISO/IEC standard for HEVC?
A) ISO/IEC 14496-10
B) ISO/IEC 23008-2
C) ISO/IEC 13818-2
D) ISO/IEC 11172-2
Answer: B) ISO/IEC 23008-2
Rationale: HEVC (High Efficiency Video Coding) is standardized as ISO/IEC 23008-2,
which defines the video coding layer and the High Efficiency Video Coding (HEVC)
standard.
9. Which of the following are MPEG-4 error resilience tools for transmitting video
over wireless and other impaired channels?
A) Re-synchronization markers
B) Data partitioning
C) Reversible VLC
D) All of the above
, Answer: D) All of the above
Rationale: MPEG-4 provides multiple error resilience tools including re-synchronization
markers, data partitioning, and reversible variable length coding (VLC) to improve
performance over error-prone channels.
10. In terms of encoding and multiplexing, what allows non-real time modification
of encoded digital MPEG-2 video streams?
A) Packetization
B) Modulating
C) Transrating
D) Remultiplexing
Answer: B) Modulating
Rationale: Modulating encoded digital MPEG-2 video streams enables non-real time
modification of the content while maintaining the integrity of the elementary stream.
11. Which statement describes I-frame flash or background breathing?
A) As panning speed increases, motion vectors become less accurate
B) I-frames are always compressed with maximum quality
C) Backgrounds are stable regardless of motion
D) Motion estimation always works perfectly
Answer: A) As panning speed increases, motion vectors become less accurate
Rationale: I-frame flash or background breathing occurs when panning speed causes
motion vectors to become less accurate, leading to visible compression artifacts.
12. How does the AVC multi-rate capability make adaptive bit rate transmission
possible?
A) By using fixed bit rates only
B) A video stream can switch to a lower bit rate when channel conditions degrade
C) By encoding all streams at maximum quality
D) By eliminating all rate control
