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Test of audio and video processing

In the quiz below, the network administrator will send you a new topic that is processing audio and video. If you do not know how this topic will have questions, please refer to the article below.

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  • Question 1. MPEG-4 standard compresses images according to the following principles:
    • Objects in the image are separated and compressed according to different methods
    • Objects in the image are compressed according to different methods and transmitted at different times
    • The objects in MPEG-4 compression are images obtained from cameras and 2-D, 3-D images created on the computer, etc.
    • A, B, C are all right
  • Question 2. In MPEG-4, "key signal" is used to:
    • Floating the border of details in the image
    • Show close-up objects (foreground) on the background image
    • Determine the boundary between the background image and the detailed image
    • B and C are all right
  • Question 3. In MPEG-4, motion vector is defined for:
    • Block in VO
    • VOC
    • VOL
    • GOV
  • Question 4. According to MPEG-4 standard, AC systems in DCT block are coded according to the method:
    • Same as in MPEG-2
    • RLC
    • DPCM
    • A, B, C are wrong
  • Question 5. In MPEG-4, the DCT coefficients are read from a 2-dimensional coefficient matrix according to:
    • Zig-zag line as in MPEG-2
    • Orbit from left to right, from top to bottom
    • Use both ways
    • A, B, C are wrong
  • Question 6. The sprite object in MPEG-4 is:
    • Background scene is the same size as the display screen
    • Background images are larger than the display size
    • The image details are the largest in the image
    • High frequency components of the image
  • Question 7. The sprite object in MPEG-4 can be transmitted:
    • Before starting to transmit other multimedia data
    • After the transmission of other multimedia data
    • At the same time with other multimedia data
    • A and C are the same
  • Question 8. The sprite object in MPEG-4 is encoded
    • In the picture
    • Approximate motion
    • Approximate motion
    • A, B, C are all right
  • Question 9. In any standard, the glare signal is sampled at all points according to the Nyquist theorem:
    • Standard 4: 2: 0
    • Standard 4: 2: 2
    • Standard 4: 4: 4
    • A, B, C are all right
  • Question 10. In the color triangle the unit exists:
    • Colors with all different glare levels
    • Colors with all different glare levels
    • Colors with every dominant wavelength
    • A, B, C are all right

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Kareem Winters

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Kareem Winters
Update 24 May 2019

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