Chapter Questions
How many television systems have been developed worldwide? Compare and contrast these standards.
Explain horizontal and vertical scanning.
What is the advantage of interlaced video over progressive video? What is the disadvantage?
How long are the horizontal and vertical retrace periods in NTSC and PAL systems? What happens during the horizontal and vertical retrace period?
What are the advantages of using $\{\mathrm{Y}, \mathrm{I}, \mathrm{Q}\}$ and $\{\mathrm{Y}, \mathrm{U}, \mathrm{V}\}$ color spaces over $\{\mathrm{R}, \mathrm{G}, \mathrm{B}\}$ color space for TV transmission?
Choose an image of your choice. Repeat Example 12.1 and determine the energy compaction performance of the $\{\mathrm{Y}, \mathrm{I}, \mathrm{Q}\}$ and $\{\mathrm{Y}, \mathrm{U}, \mathrm{V}\}$ color spaces. You may use the MATLAB code provided in the CD.
Sketch the NTSC signal spectrum. Why do I and Q channels require less bandwidth compared to $\mathrm{Y}$ channel?
How is composite video generated in the NTSC system? How is the chroma signal generated?
Why is a good comb filter necessary for a good quality TV receiver?
Compare and contrast component, composite, and S-video.
What are the advantages of digital television over analog television?
Draw the schematic of a generic digital TV system. Explain the operation of different subsystems.
How many HDTV systems have been developed worldwide? Compare them.
Draw the schematic of the GA HDTV encoding system.
Draw the schematic of the GA HDTV decoding system.
What is the packet length of the HDTV bitstream? What are the advantages and disadvantages of shorter and longer packets?
Draw a typical HDTV signal spectrum. Explain the different parts of the spectrum. Where is the pilot carrier located?
Explain the channel coding and modulation techniques of GA HDTV system.
Explain the principles of the Reed Solomon code. What is the maximum number of errors that can be corrected by $(p, q)$ RS code?
Explain the principle of the Trellis code.