Lec32HDTV - ECE 488 RF Circuits and Systems Spring 2009...

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1 ECE 488 RF Circuits and Systems The NTSC to HDTV Revolution Signal Coding Spring 2009 Lecture # 32 2009/4/15 Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 1 Signal Decoding NTSC History 1940’s standard set, even for color 6 MHz bandwidth B/W had to be compatible with color format Mono had to be compatible with stereo format Block diagrams and schematics Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 3 Detected signals Sound encoding/decoding Tuner section FM stereo decoding Video decoding CRT driving NTSC Spectrum TV signal specifications Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 4 TV signal specifications HD vs. NTSC Spectra HD FLAT SPECTRUM Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 5 BIG SPIKE IN SPECTRUM NTSC Operation – Signals Huge sync pulse! Highest levels blank High levels black Low levels high brighness Color burst Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 6 Burst of 8 cycles 3.579545 MHz Syncs PLL loop Calibrates color decoding NTSC Operation – Sound Encoding Two signals over same wire! Left and right channels Quadrature coding – another use of hybrids • A cos ω t + B sin ω t Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 7
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2 NTSC Operation -- Overview Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 8 NTSC Operation – Receiver Basic AM receiver Swartz 06/4/17 ECE 488 – RF Circuits and Systems – Spring 2009 Lecture 32: 9 NTSC Operation – Sound Decoding FM Stereo
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This note was uploaded on 07/09/2009 for the course ECE 4880 taught by Professor Swartz during the Spring '06 term at Cornell University (Engineering School).

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Lec32HDTV - ECE 488 RF Circuits and Systems Spring 2009...

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