Audio Visual Engineering Television-the art ofimage transmission and reception CAMERA TELEVINSION
Television - the art of image transmission and reception CAMERA TELEVISION
Audio Visual Engineering Early days, camera adopted line scanning Vidicon line scanning Electronic signals in PAL, NtsC standards TELEVINSION
Early days, camera adopted line scanning Vidicon - line scanning TELEVISION Electronic signals in PAL, NTSC standards
Audio Visual Engineering No scanning required now, standard remains the same CCD-solid state image recorain Electronic signals in PAL, NtsC standards TELEVISION
No scanning required now, standard remains the same CCD - solid state image recording TELEVISION Electronic signals in PAL, NTSC standards
Audio Visual Engineering focus coil d target scan coils ng glass cathode tin oxide 1------------------ wall heater anode video accelerating R ht supply Figure 1 g J.S. Zarach and Noel M. Morris, Television principles& practice
Figure 1 J.S. Zarach and Noel M. Morris, Television principles & practice
Audio Visual Engineering Audio requency Signal Modulator M Video y RE Signal Modulator Modulator Syn. Pulses Generator Figure 2
Figure 2 Amplitude Modulator Frequency Modulator Syn. Pulses Generator RF Modulator Audio Signal Video Signal Y MY (I.F.)
Audio Visual Engineering Resolution The smallest distance that can exist between two points Maximum number of points that can exist in an area igure 3
Figure 3 Resolution: • The smallest distance that can exist between two points • Maximum number of points that can exist in an area x
Audio Visual Engineering B/ B/W R B/W G B/W B Weighted sum Figure 4a
B/W Y B/W R B/W G B/W B + Y Weighted sum Figure 4a
Processing ofllluminance in Iv ystem Camera Y Negative AM fy-1F carrier D.C 5.5MHZ fy 5.5MHz Y LSB USB Figure 4b
Y Camera Figure 4b Negative AM MY fY - I.F. Carrier fY D.C. LSB USB fY + 5.5MHz Y 5.5MHz
Audio Visual Engineering D. C Jy f r +5. 5MHz signal LSB USB D. C fy Filter Passband D. C fy f r+5.5MHz SSB Signal gure 5a
Figure 5a f D.C. Y fY Filter D.C. Signal LSB USB f D.C. Y SSB Signal fY + 5.5MHz fY + 5.5MHz Passband
Audio visual Engineering D. C Jy f r +5. 5MHz Signal LSB USB D. C fy ilter Passband D. C fy f r+5.5MHz FSB ⅤSB USB Figure 56
Figure 5b f D.C. Y fY Filter D.C. Signal LSB USB f D.C. Y VSB Signal VSB USB fY + 5.5MHz Passband fY + 5.5MHz