Medical Multimedia Course

What is the most common frame rate used in film production?

30 fps
60 fps
24 fps (correct)
25 fps

What type of sensor is used to convert light into an electronic signal in a video camera?

CCD (correct)
GPU
CPU
LED

How is analog video typically represented?

As a continuous time-varying signal (correct)
As a series of still images
As a digital waveform
As a sequence of digital images

What determines the resolution of analog video?

Number of horizontal scan lines (A) Signup and view all the answers

What is the main difference between television signals and computer signals?

Scanning system (B) Signup and view all the answers

What is the purpose of sampling in digital video?

To represent the visual scene digitally (A) Signup and view all the answers

What is the main characteristic of digital video?

Represented as a sequence of digital images (B) Signup and view all the answers

What is the frame rate used in high-definition TV?

60 fps (C) Signup and view all the answers

What is one of the advantages of digital representation for video?

Direct access, which makes nonlinear video editing simple (B) Signup and view all the answers

What is the purpose of an Analog to Digital Converter (ADC) in digital video?

To convert analog video signals into digital format (A) Signup and view all the answers

What determines the number of bytes required to represent a digital video file?

Resolution and color encoding (A) Signup and view all the answers

What is the purpose of a Video Capture Card (VCC) in digital video?

To convert analog video signals into digital format (C) Signup and view all the answers

What is digital video composed of?

Graphics and audio (D) Signup and view all the answers

Why is digital video easy to edit?

Because it can be processed and integrated into various multimedia applications (C) Signup and view all the answers

What is the role of a Digital to Analog Converter (DAC) in digital video?

To convert digital video signals into analog format (C) Signup and view all the answers

What property of digital video determines how many frames are displayed per second?

Frame rate (B) Signup and view all the answers

What is the purpose of interlacing in analog video scanning?

To reduce flicker and eye strain (D) Signup and view all the answers

How are the scan lines arranged in interlaced scanning?

With a small gap between lines, due to a small voltage (C) Signup and view all the answers

What is the term for the jump from Q to R in the interlaced scanning process?

Horizontal retrace (D) Signup and view all the answers

How does progressive scanning differ from interlaced scanning?

Progressive scanning paints the image in one pass from top to bottom (A) Signup and view all the answers

What is the disadvantage of progressive scanning?

It requires more bandwidth (A) Signup and view all the answers

What is the purpose of the YUV color model?

To transmit TV signals (A) Signup and view all the answers

What is the function of the luminance (Y) component in the YUV color model?

To represent the brightness of the image (B) Signup and view all the answers

What is the term for the combination of two fields in analog video scanning?

Frame (A) Signup and view all the answers

What determines the brightness of the color in the YUV color model?

Y component (A) Signup and view all the answers

What is the range of Y in digital formats?

0 to 255 (D) Signup and view all the answers

What is the axis from blue to yellow in the YUV color model?

U axis (D) Signup and view all the answers

What is the purpose of subsampling in video transmission?

To reduce the bandwidth (B) Signup and view all the answers

What is the result of experiments with the human visual system on video signals?

An acceptable quality of video for broadcast (A) Signup and view all the answers

What is the process of keeping the luminance untouched and subsampling the chrominance?

Chrominance subsampling (C) Signup and view all the answers

What is the purpose of YUV color model in video broadcasting?

To reduce the bandwidth for transmission (C) Signup and view all the answers

What is the result of subsampling in video signals?

A variety of subsampling ratios (D) Signup and view all the answers

What is the primary purpose of using video in multimedia?

To deliver multimedia effectively (A) Signup and view all the answers

Which of the following statements is true about a video image or frame?

It is a 2-D projection of a 3-D scene (C) Signup and view all the answers

What performance demand does video place on a computer?

Highest demand on memory and storage (A) Signup and view all the answers

How does digital video compare to analog video in terms of cost and quality?

Digital video produces high-quality products at a lower cost (B) Signup and view all the answers

What illusion is created by the sequential display of video frames at a certain speed?

Movement (D) Signup and view all the answers

What process does video technology NOT involve?

Improving textual document readability (C) Signup and view all the answers

Which one of the following is NOT a characteristic of a 2-D video representation of a 3-D scene?

It includes depth information (C) Signup and view all the answers

Which of the following is a major benefit of digital video over analog video?

Better integration with multimedia (D) Signup and view all the answers