MPEG Multimedia Standards and Descriptors Quiz
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1. Which of the following statements about MPEG is not correct?
- a. MPEG-1/2/4 are multimedia standards related to video and audio compression.
- b. MPEG-7 is a multimedia content description standard that standardizes the extraction process and usage of audiovisual descriptors.
- c. MPEG-7 is a multimedia content description standard that standardizes the syntax and semantics of audiovisual descriptors.
2. The Dominant Color Descriptor (DCD) captures…
- a. The spatial distribution of the colors in an image using by default the YUV color space.
- b. A maximum of eight representative colors using by default the RGB color space.
- c. All the colors in the RGB color space with a larger percentage than 10.
3. The Color Structure Descriptor (CSD)…
- a. Does not capture the local spatial structure of the colors nor the color distribution of an image.
- b. Is like a color histogram but with a larger window (structuring element).
- c. Is the most easily interoperable color descriptor.
4. Which of the following statements about the Motion Activity Descriptor (MAD) is correct?
- a. The thresholds of the intensity of activity were extracted empirically after analyzing video segments rated by humans.
- b. The motion vectors can be extracted directly from an MPEG stream or computed with an algorithm like the block matching algorithm.
- c. All the above statements are correct.
5. The Motion Trajectory Descriptor (MTD)…
- a. Standardizes the segmentation and the tracking of a concrete object in order to create a model of its trajectory.
- b. Models the trajectory of an object taking into account its center of mass as a reference point.
- c. Employs an iterative non-linear technique in order to reduce the number of trajectory frequency-points.
6. Which of the following statements about the Face Descriptor (FD) is not correct?
The FD…
- a. Is based on the Principal Component Analysis (PCA) technique to reduce the information of a face.
- b. Approximates a face using the maximum number of coefficients in order to have the minimum possible error.
- c. Can be used to identify or verify the identity of a person.