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Digital Media Chapter 6

Terms in this set (50)

Which of the following is the television broadcast standard for the United States and Japan?
NTSC
Which of the following is the television broadcast standard for most of the Asian countries?
PAL
Which of the following is the most common color model for video?
luminance-chrominance
4. In the YUV color model, the Y-component is _____, the U-component is ______, and the V component is _____.
luminance; chrominance; chrominance
The frame rate for the NTSC system is _____ fps.
29.97
The frame rate for the PAL system is _____ fps.
25
The frame rate for motion-picture film is _____ fps.
24
Interlaced scan displays the frame by scanning the lines of a frame _______.
in two passes: even-numbered lines in one pass and odd-numbered lines in the second
Progressive scan displays the frame by scanning the lines of a frame _____.
in one pass from top to bottom
The comb-like artifact in a digital video, as shown in Figure 6.18, occurs in the _____ video.
interlaced
11. True/False: There is no sampling and quantization involved in capturing motion in digital video.
False
The frame size of a video refers to the video's _____.
resolution
True/False: The pixel per inch (ppi) is an important attribute for video resolution and should be
False
Pixel aspect ratio means _____.
the ratio of a pixel's width to its height D. the ratio of a pixel's height to its width
The pixel aspect ratio of a wide-screen-format, standard-definition video is _____.
1.2
The pixel aspect ratio of a standard-format, standard-definition video is _____.
0.9
The frame aspect ratio of a wide-screen-format, standard-definition video is _____.
16:9
The frame aspect ratio of a standard-format, standard-definition video is _____.
4:3
The frame aspect ratio of a high-definition video is _____.
16:9
If a frame with a pixel aspect ratio of 1.2 is displayed on a device using a pixel aspect ratio of 1.0, the image will be _____.
Stretched Vertically
21. True/False: The timecode representing the 35th frame is either 00:00:00:35 or 00;00;00;35.
False
22. True/False: The drop-frame timecode drops or discards frames to preserve the time accuracy of a video.
False
Which of the following is the drop-frame timecode format?
b00;00;00;00
Which timecode format is preferable for the NTSC system?
non-drop frame
Chroma subsampling reduces the storage of pixel information by assigning fewer bits to store the _____ components.
chrominance
The format of Chroma subsampling is designated with three numbers separated by colons (for example, 4:2:2) to represent ______.
the ratio of the luminance to the two chrominance components
True/False: The signals of digital television are broadcast or transmitted digitally.
True
True/False: The frame aspect ratio of all six HDTV formats is 16:9.
True
HDTV is in _____ format.
MPEG-2
The frame size for NTSC standard-definition DV is _____ pixels, and _____ pixels for the PAL system.
720 x 480; 720 x 576
The numbers 720 and 1080 in the high-definition video picture format notations such as 720/30p and 1080/60i designate the _____.
height (in pixels) of the frame size
The letters "p" and "i" in the high-definition video picture format notations such as 720/30p and 1080/60i stand for _____ and _____, respectively.
progressive; interlaced
True/False: A very long video, even with low data rate, can have a large file size.
True
Which of the following provides a measure for predicting the smoothness of video playback? If the value of that property is too high for the playback device to handle, the playback of the video will be choppy.
data rate
Name several strategies to reduce the file size of a video.
Reduce frame, lower frame rate, compress video
What does the term codec stand for?
compressor/decompressor
_____ compression refers to the type of compression method that aims at compacting individual frames.
Spatial
_____ compression refers to the type of compression method that exploits the similarity of the subsequent frame content.
Temporal
_____ compression refers to the type of compression method that preserves the original data.
Lossless
_____ compression refers to the type of compression method that discards or alters some of the original data.
Lossy
_____ compression refers to the type of compression method in which the amount of time and the complexity required to compress and decompress are significantly different.
Asymmetric
Which of the following compression methods achieves higher compression for videos without much motion difference, such as for talking heads?
temporal compression
Which of the following types of video can be compressed the most with temporal compression?
slow, continuous motion
True/False: The MP3 audio is a MPEG-3
False
Which of the following support the DVD-video, high-definition video, and HDTV standards?
MPEG-2
Which of the following also targets mobile applications, such as cell phones?
MPEG-4
Motion compensation is a key technique in _____ compression.
temporal
The _____ is encoded using only the information within that frame.
I-frame
The _____ is encoded using only the previous I- or P-frame as the reference frame.
P-frame
The _____ is encoded using the previous and subsequent I- and/or P-frames as the reference frames.
B-frame
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