DVEP EXAM QUESTIONS AND ANSWERS
How is the artifact blockiness (macroblocking) in MPEG-2 dealt with in MPEG-4 -
Answers :objects can be encoded and transmitted separately to the decoder
In the H.264/AVC main profile, what is the sample depth per Y, Cr, and Cb - Answers :8
Which are the layers of the MPEG-4 architecture? - Answers :delivery, synchronization
and media
According to the Nyquist theorem, what must be the desired sampling rate? - Answers
:at least 2 times the frequency max
Which of the following statements describe an under run condition? - Answers :the
average Ethernet inter-packet gap timing at the delivery rate is less than the buffer can
handle
What term describes images or parts of images that do not change over time in MPEG-
4? - Answers :sprites
Which network video service design describes servers in each hub site that store
content? - Answers :distributed
How does the AVC multi-rate capability make adaptive bit rate transmission possible? -
Answers :a video stream can switch to a lower bit rate when channel conditions
degrade
What is the current ISO/IEC standard for HEVC? - Answers :ISO/IEC 23008-2
Which statement describes I-frame flash or background breathing? - Answers :as
panning speed increases, motion vectors become less accurate
Which of the following are MPEG-4 error related resilience tools for transmitting video
over wireless and other impaired channels? - Answers :all of the above
Which two statements define the problem an MPEG profile will address? - Answers
:code complexity, processing power
In terms of encoding and multiplexing, what allows non-real time modification of
encoded digital MPEG-2 video streams? - Answers :modulating
How might a cable operator indicate a particular QoS required in the network? -
Answers :using a marking in the IP type of service field
What does a cable operator perform when the total bit rate of all of the video streams
exceeds the capacity of the output multiplex? - Answers :rate shape
How is the artifact blockiness (macroblocking) in MPEG-2 dealt with in MPEG-4 -
Answers :objects can be encoded and transmitted separately to the decoder
In the H.264/AVC main profile, what is the sample depth per Y, Cr, and Cb - Answers :8
Which are the layers of the MPEG-4 architecture? - Answers :delivery, synchronization
and media
According to the Nyquist theorem, what must be the desired sampling rate? - Answers
:at least 2 times the frequency max
Which of the following statements describe an under run condition? - Answers :the
average Ethernet inter-packet gap timing at the delivery rate is less than the buffer can
handle
What term describes images or parts of images that do not change over time in MPEG-
4? - Answers :sprites
Which network video service design describes servers in each hub site that store
content? - Answers :distributed
How does the AVC multi-rate capability make adaptive bit rate transmission possible? -
Answers :a video stream can switch to a lower bit rate when channel conditions
degrade
What is the current ISO/IEC standard for HEVC? - Answers :ISO/IEC 23008-2
Which statement describes I-frame flash or background breathing? - Answers :as
panning speed increases, motion vectors become less accurate
Which of the following are MPEG-4 error related resilience tools for transmitting video
over wireless and other impaired channels? - Answers :all of the above
Which two statements define the problem an MPEG profile will address? - Answers
:code complexity, processing power
In terms of encoding and multiplexing, what allows non-real time modification of
encoded digital MPEG-2 video streams? - Answers :modulating
How might a cable operator indicate a particular QoS required in the network? -
Answers :using a marking in the IP type of service field
What does a cable operator perform when the total bit rate of all of the video streams
exceeds the capacity of the output multiplex? - Answers :rate shape
