DMA495-TVGlossary

DMA495-TVGlossary - TVA STUDY TERMS by Dr. George Vinovich...

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1 TVA STUDY TERMS by Dr. George Vinovich 1) persistence of vision - makes perception of motion in film and video possible. Image burned in optic nerve . 2) film medium - chemical/mechanical photographic process at 24 fps (film cam/projector/film) . 3) video medium - electronic/electromagnetic process at 30 fps (video cam/VTR/CRT/video tape) . 4) aesthetic distance - hides details of reality/makes film better medium for make-up/fantasy/illusion . 5) ADR (looping) - Automated Dialogue Replacement to re-record actors' dialogue in studio for pure sound . 6) foley - foley artists perform better quality footsteps and sound effects live in sync with the visual action on screen . 7) film chain (telecine) - converts film footage on projector (24 fps) to video signal (30 fps) for playback on video tape . 8) kinescope - technique of preserving live TV shows before video tape recording by filming the TV screen with a film camera . 9) transducer - instrument which converts one form of energy into another form of energy (Mic, Speaker, CCD, CRT, Rec Head) . 10) microphone - converts acoustic energy (sound) {740 mph} into electrical voltage (audio) {speed of light} . 11) CCD video camera - uses a "Charged Coupled Device" (chip) to convert visible light into electrical voltage (video) . 12) VTR - machine for recording and playing back audio and video signals on video tape (VCR) (Deck) . 13) record head - transducer that converts electrical voltage into electromagnetic energy for recording signal on magnetic tape . 14) playback head - transducer that converts electromagnetic energy into electrical voltage for playback of signal on magnetic tape . 15) CRT - Cathode Ray Tube converts electrical voltage into visible light via NTSC scanning (TV Picture Tube) or (LCD is similar) . 16) speaker - converts electrical voltage (audio) into acoustic energy (sound) . 17) NTSC - 525 lines 60 fields 30 fps (1/30th of a second) 2:1 interlace (Standard used in North America/Japan) . 18) lines - (525 total) lines scanned every 1/30th of a second via 2:1 interlace in NTSC. (1125 total) in HDTV . 19) fields - (60 total) 262.5 odd numbered lines scanned every 1/60th of a second; 262.5 even lines scanned every 1/60th of a second . 20) frames - (30 total) combination of odd and even fields via 2:1 interlace to make one video frame (525 lines every 1/30th sec) . 21) fps - (30) "frames per second". NTSC operates at 30 fps as opposed to film at 24 fps or PAL and SECAM at 25 fps . 22) 2:1 “interlace scanning” - alternating scan of odd numbered lines and then even numbered lines to produce one frame of video . 23) 24P “progressive scanning”- scan all 525 lines every 1/24 th of a second to produce one frame of video (no alternating fields) . 24)
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DMA495-TVGlossary - TVA STUDY TERMS by Dr. George Vinovich...

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