DVEP Updated Study Guide Material - Comprehensive Answer Key

DVEP Updated Study Guide Material - Comprehensive Answer Key How is the artifact blockiness (macroblocking) in MPEG-2 dealt with in MPEG-4 - answer - 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 - 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 What does a cable operator perform when the total bit rate of all of the video streams exceeds the capacity of the output multiplex? - answer - rate shape What is the name that describes many packetized elementary streams of audio and video that are combined into a single group of channels? - answer - multi-program transport stream Which of these explain why a large number of reference frames were added to MPEG-4? - answer - - to compress motion that is periodic in nature - to more effectively deal w/alternatiing camera angles What is the troubleshooting tool that can provide similar information to real-time video? - answer - What is the type of encoder that creates IP video segments using different bitrates? - answer - adaptive Which statement is false about deployment closeout? - answer - troubleshooting, tips, documents, and escalation procedures must be included for operations What is the primary component that the human brain acknowledges when it comes to a cable operators television program? - answer - google (luminance or chrominance) Which of these explain why a large number of reference frames were added to MPEG-4? - answer - - to compress motion that is periodic in nature - to more effectively deal w/alternatiing camera angles What is the HTTP-based media streaming communications protocol implemented by Apple Inc.? - answer - HTTP Live Streaming What is the name of the headend device that creates real-time multi-program transport streams of audio and video? - answer - decoder When the jitter on a decoder exceeds __ a PCR accuracy error has occurred. - answer - +/- 40ns What is it called when multiple analog services are MPEG-2 encoded and statistically multiplexed together into a multi-program TS for transport to a remote hub location? - answer - groomed What is the name of the container (or wrapper) format that describes how different data elements are interleaved and stored in a computer file? - answer - metadata How many bits per symbol does 256 QAM use in its constellation build? - answer - 8 In a cable operator's ad insertion environment, which option provides the