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Test of audio and video processing

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