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TV TECHNOLOGY TODAY

TV TECHNOLOGY TODAY. Lee Hoke Retired FORMER MANAGER OF PHILIPS-MAGNAVOX TV SET ENGINEERING. WHAT HAS HAPPENED TO THE OLD FRIEND TV SET THAT WE GREW UP WITH?. 1930’s SEVERAL TV SYSTEMS DEMONSTRATED

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TV TECHNOLOGY TODAY

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  1. TV TECHNOLOGY TODAY Lee Hoke Retired FORMER MANAGER OF PHILIPS-MAGNAVOX TV SET ENGINEERING

  2. WHAT HAS HAPPENED TO THE OLD FRIEND TV SET THAT WE GREW UP WITH?

  3. 1930’s SEVERAL TV SYSTEMS DEMONSTRATED The 1939 Worlds Fair opened with a speech by President Franklin D. Roosevelt, which NBC teamed with RCA to beam across the city in the first large-scale display of television. MAY 1941 – NATIONAL TELEVISION SYSTEMS COMMITTEE (NTSC) STANDARD FOR B&W TV WAS ADOPTED BY FCC.

  4. Retrace

  5. White Black

  6. 1930’s SEVERAL TV SYSTEMS DEMONSTRATED MAY 1941 – NATIONAL TELEVISION SYSTEMS COMMITTEE (NTSC) STANDARD FOR B&W TV WAS ADOPTED BY FCC. 1953 - NTSCCOLOR TV STANDARDADOPTED JAN. 1, 1954 - FIRST NATIONAL COLOR TV BROADCAST – ‘TOURNAMENTOFROSES’

  7. COLOR BAR TEST PATTERN

  8. TRI-GUN CATHODE RAY TUBE

  9. INSIDE A TRIGUN COLOR PICTURE TUBE

  10. March 1984 - BROADCAST TELEVISION SYSTEMS COMMITTEE (BTSC) STANDARD ADOPTED FOR MULTICHANNEL TV SOUND. STEREO SOUND dbx companding Separate Audio Program (Spanish) L R

  11. WIDE SCREEN HIGH DEFINITION DIGITAL SIGNAL PROCESSING DISPLAY TECHNOLOGY

  12. WIDE SCREEN DESIRE FOR MOVIE-LIKE PRESENTATION vs. 4 X 3 (1.33 : 1) TV DISPLAY STANDARD 35mm MOVIE - 2.1 : 1 CINEMASCOPE & PANAVISION 35mm ANAMORPHIC 2.40 : 1 1959 BEN-HUR 2.76 : 1

  13. 1980’S ANALOG WIDE SCREEN TV – WHY NOT? A WIDER PICTURE WOULD REQUIRE MORE TRANSMITTED DATA TV CHANNEL WIDER THAN 6 MHz WAS NOT POSSIBLE ANY NEW SIGNAL CONFIGURATION WOULD HAVE TO BE COMPATIBLE FOR OLDER SETS POSSIBLE SOLUTION: TRANSMIT STANDARD 4 X 3 PICTURE AND ENCODE SIDE-PANELS BACK INTO MAIN CHANNEL SIMILAR TO THE TECHNIQUE FOR COLOR IN 1950’S

  14. WIDE SCREEN / HIGH DEFINITION ACTIVITIES ELSEWHERE JAPAN - LATE 1970’S ‘MUSE’ SYSTEM 1125 LINES X 60 FRAMES EUROPE EBU – EARLY 1980’S ‘EUREKA’ 1250 LINES X 50 FRAMES

  15. FORMATION OF ADVANCED TELEVISION SYSTEMS COMMITTEE (ATSC) 1982 A HANDFULL OF TV SET & BROADCAST COMPANIES TECHNICAL PROPOSALS DEMONSTRATIONS DISCUSSIONS

  16. 1993 ‘THE GRAND ALLIANCE’ AT&T, GENERAL INSTRUMENTS, MIT, PHILIPS, SARNOFF, THOMPSON & ZENITH 4 COMPETING DIGITAL SYSTEMS RESOLVED INTO 1 SYSTEM WITH MULTIPLE OPTIONS

  17. WHY DIGITAL TV ? Analog B/W TV system dates to prior WW-2. Color was added in 1953 SO, IT’S OLD !!!! Technology marches on!! Nearly all the other household electronics devices are digital - - DVD, Audio CD, Camera, Computer, Satellite TV, Satellite Radio.

  18. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV)

  19. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV) 1982–1992 Numerous HDTV System proposals & tests

  20. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV) 1982–1992 Numerous HDTV System proposals & tests 1993 – Formation of Grand Alliance –AT&T, Sarnoff Research, Philips, Thomson (RCA) & Zenith

  21. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV) 1982–1992 Numerous HDTV System proposals & tests 1993 – Formation of Grand Alliance –AT&T, Sarnoff Research, Philips, Thomson (RCA) & Zenith Feb 1995 – ATSC approves Digital TV Standard

  22. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV) 1982–1992 Numerous HDTV System proposals & tests 1993 – Formation of Grand Alliance –AT&T, Sarnoff Research, Philips, Thomson (RCA) & Zenith Feb 1995 – ATSC approves Digital TV Standard Nov 1998 – 10 largest markets begin broadcast

  23. HISTORICAL DATES IN DEVELOPMENT of DIGITAL TV 1982 – Adv. TV Systems Committee formed (ATSC) (High Def. TV) 1982–1992 Numerous HDTV System proposals & tests 1993 – Formation of Grand Alliance –AT&T, Sarnoff Research, Philips, Thomson (RCA) & Zenith Feb 1995 – ATSC approves Digital TV Standard Nov 1998 – 10 largest markets begin broadcast 2006 – All O-T-A stations broadcast only digital signal

  24. BUREAUCRATIC ITEMS – FCC Comm. Act of 1996 Spectrum Recovery All future stations will be located between Ch. 7 & 51. Elimination of TV from Ch. 2-6, 52-69 Sale of these abandoned channels by lottery for use by safety, mobile phone and other services. Result: Mega$ to U.S. Treasury

  25. ORIGINAL TV CHANNELS 1945 - 1982 O.T.A. TV CHANNELS 2 - 6 7 - 13 14 - 51 - 69 - 83 VHF UHF 50 100 200 300 400 500 600 700 900 BROADCAST FREQUENCY (MHz)

  26. REVISED TV CHANNELS 1982 & 1996 O.T.A. TV CHANNELS 2 - 6 7 - 13 14 - 51 - 69 - 83 UHF VHF 50 100 200 300 400 500 600 700 900 BROADCAST FREQUENCY (MHz)

  27. LOUISVILLE’S DIGITAL BROADCAST CHANNELS Call Letters Affil. Old New WAVE NBC 3 47 WHAS ABC 11 11 WLKY CBS 32 26 WDRB FOX 41 49 WKPC PBS 15 17 WBNA ION 21 8

  28. ADVANTAGES • Noise-free picture

  29. ADVANTAGES • Noise-free picture • Higher picture detail in same channel space

  30. ADVANTAGES • Noise-free picture • Higher picture detail in same channel space • Wide-Screen Movie Picture format

  31. NEW PICTURE SIZE 16 : 9 LENGTH TO WIDTH RATIO 16 9

  32. NEW PICTURE SIZE 16 : 9 LENGTH TO WIDTH RATIO 16 : 9 4 : 3

  33. SCREEN SHAPE – PICTURE MISMATCH WIDE-SCREEN TV SHOW CONVENTIONAL 4:3 TV SCREEN

  34. ADVANTAGES • Noise-free picture • Higher picture detail in same channel space • Wide-Screen Movie Picture format • Multiple programs broadcast within one channel

  35. DIGITAL CHANNEL BROADCAST CAPABILITY a b c d 4 – STD. DEF. PROGRAMS 1 – HIGH DEF. PROGRAM 1 CHANNEL

  36. ADVANTAGES • Noise-free picture • Higher picture detail in same channel space • Wide-Screen Movie Picture format • Multiple programs broadcast within one channel • Less interference between stations

  37. ADVANTAGES • Noise-free picture • Higher picture detail in same channel space • Wide-Screen Movie Picture format • Multiple programs broadcast within one channel • Less interference between stations • Greatly improved sound ( 5.1 channels )

  38. DOLBY 5.1 CHANNEL SOUND TV C L SW R BOOM BOOM SOFA RR LR

  39. DISADVANTAGES • Signal not compatible with existing receivers

  40. DISADVANTAGES • Signal not compatible with existing receivers • Requires Set-top Box to adapt older sets

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