High definition television (HDTV) provides higher resolution images than standard definition through digital broadcasting and a 16:9 aspect ratio. HDTV uses progressive or interlaced scanning to display pixels arranged in resolutions like 1280x720 or 1920x1080. Blu-ray players can output full 1080p high definition images through an HDMI cable connected to an HDTV. When purchasing an HDTV, factors to consider include having at least 720p resolution, HDMI ports, screen size, and built-in tuners to receive HD programming.

1. High Definition Television By: BalappravinChandrasegaram& RodelA.Orpiano Friday November 27 2009

2. Table of Contents- What is High Definition Television- PixelsScanning Systems

3. Progressive Scanning

4. Interlaced scanning

5. Blu-ray

6. High Definition Programming

7. Tips for Purchasing HD Television

8. Summary and Conclusion

9. References

10. QuestionsWhat’s High Definition Television? High definition television (or HDTV) is a digital television broadcasting system with higher resolution that standard-definition television. (2) Digital cable comes in three formats - standard, enhanced, and high definition. A high definition signal is broadcasted in a 16:9 aspect ratio rather then the old 4:3 ratio.

11. PixelsA pixel is the smallest item of information in an image.

12. PixelsFrame size in pixels is defined as number of horizontal pixels × number of vertical pixels, for example 1280 × 720 or 1920 × 1080. (3)1080p can be referred to as full HDScanning systemThere are two types of scanning systems which are noted with the letter p for progressive scanning or ifor interlaced scanning.

13. Progressive scanningProgressive or non-interlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence.(4)

14. Interlaced scanningInterlaced is a technique of improving the picture quality of a video signal without consuming extra bandwidth. (5)Interlaced video was designed for display on CRT televisions. (5)

15. Progressive or Interlaced scanning, which is better?Progressive scanning is better than interlaced scanning because it processes the images in half the time. This faster scanning rate produces higher clarity and color in the picture.

16. Blu-rayBlu-ray player plays movies in high definitionAll movies released on Blu-ray can produce a full 1080p High Definition picture when the Blu-ray Disc player is connected to a 1080p HDTV with a HD MI cable. (6) (7)

17. Blu-rayCurrent generation video game consoles such as Sony Playstation 3 and Xbox 360 are able to display 1080p through HDMI ports (8) (9)

18. High Definition Programming (10)