WITH ANSWERS GRADED A+
◉ In the H.264/AVC main profile, what is the sample depth per Y, Cr,
and Cb. Answer: 8
◉ Which are the layers of the MPEG-4 architecture? Answer: delivery,
synchronization and media
◉ According to the Nyquist theorem, what must be the desired sampling
rate? Answer: at least 2 times the frequency max
◉ Which of the following statements describe an under run condition?
Answer: 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? Answer: sprites
◉ Which network video service design describes servers in each hub site
that store content? Answer: distributed
, ◉ How does the AVC multi-rate capability make adaptive bit rate
transmission possible? Answer: a video stream can switch to a lower bit
rate when channel conditions degrade
◉ What is the current ISO/IEC standard for HEVC? Answer: ISO/IEC
23008-2
◉ Which statement describes I-frame flash or background breathing?
Answer: 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? Answer:
all of the above
◉ Which two statements define the problem an MPEG profile will
address? Answer: code complexity, processing power
◉ In terms of encoding and multiplexing, what allows non-real time
modification of encoded digital MPEG-2 video streams? Answer:
modulating
◉ How might a cable operator indicate a particular QoS required in the
network? Answer: using a marking in the IP type of service field