quiz 6 - 06. Digital Sound / Video Quiz Review of attempt 1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
06. Digital Sound / Video Quiz Review of attempt 1 Started on Tuesday, 21 February 2012, 05:57 PM Completed on Tuesday, 21 February 2012, 06:21 PM Time taken 23 mins 44 secs Marks 70/100 Grade 7 out of a maximum of 10 ( 70 %) Feedback Excellent! Question 1 Marks: 10 The record industry uses which of the following digital audio standards for CDs? Choose one answer. a. DPCM (Differential Pulse Code Modulation) b. None of these c. PCM (Pulse Code Modulation) d. ADPCM (Adapative Differential Pulse Code Modulation) No, audio CDs use PCM which stores a 2 byte (16 bits - 65,536 discrete levels) digital value for every sampled value of sound. ADCPM stores the differences in the sounds between sampled values using a varying scale for the magnitude of the diffeernces. DCPM just stores the differences in the sounds between sampled values. Incorrect Marks for this submission: 0/10. Question 2 Marks: 10 Which of the following digital video compression artifacts does the filtering step NOT solve? Choose one answer. a. All these artifacts are solved by filtering b. Moiré patterns c. Jaggies d. Aliasing Correct! All the above artifacts are solved by filtering. Correct Marks for this submission: 10/10. Question 3 Marks: 10 After filtering, digitized video is converted from the YUV color scheme (used in NTSC) to the RGB (primary additive) color scheme used in computers. Answer: True False
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Correct! The human vision system is more sensitive to changes in luminance than in color, thus digital video is stored in the YUV color scheme that television uses, which allows for separate luminance and chrominance
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

quiz 6 - 06. Digital Sound / Video Quiz Review of attempt 1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online