| 1_ |
NTSC:
Introduction |
| 2_ |
Scanning,
Timing/Sync, Sync Recovery, Numbers |
| 3_ |
Gain
& Offset, D.C. Restoration, Gamma Correction |
| 4_ |
Resolution,
Bandwidth, Spectrum |
| 5_ |
Color
Physics: Eye, CIE |
| 6_ |
Color
Encoding: Color Bars, Camera,
RGB,
YIQ, Color Subcarrier |
| 7_ |
Color
Decoding: |
| 8_ |
Digital
TV/Graphics: ADC-DAC, Frame Buffers, Timebase Correction, VGA |
| 9_ |
VCR: Spectrum, Circuits |
| 10_ |
Circuits
& Practices: D.C. Restore, Proc Amps, DAs |
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Spectral Interleaving
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| Cohabitation of Luminance & Color information in the same spectrum.
This is made possible by placing the color subcarrier, with its derived
spectrum, half way between the 227th & 228th Luminance spectral lines.
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Broadcast Spectrum Shaping
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NTSC Broadcast signal uses Vestigial SideBand (VSB) transmission, with
properly bandlimited "I" & "Q" chroma information.
Note also, the aural carrier @ 4.5 MHz. In practice, this is inserted
as a highlevel aural transmitter output at the transmitting antenna.
The Video information is Amplitude Modulation (AM); the Aural information
is Frequency Modulation (FM). |
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VTR/VCR Recording Spectrum
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| Note that Video information is recorded on magnetic tape as a FM signal.
The sound recorded as conventional baseband (longitudinal) magnetic recording.
Also. in the multi head "HiFi" VHS VCRs, in addition, FM sound recording
is used. |
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Video Resolution verses Bandwidth
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Comb Filtering
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| This Analog Signal Processing (ASP) is used for "apparent" Enhanced
Horizontal Resolution, as well as, improved Video Signal to Noise Ratio
(SNR).
There is, however, a reduction in Vertical Resolution; for which certain
non-linear circuits attempt to compensate. |
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Genlock
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| Genlock is where several video sources are synchronized with each other,
e.g., either a master sync generator or a camera or a VTR/VCR.
However it cannot be used synchronize a VTR/VCR to an external source;
a TimeBase Corrector (TBC) is used for that purpose. |
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VCR Recording/Playback System: Back to Back
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