technology and media lesson 2

technology and media lesson 2 - StepsinSignalProcessing

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Steps in Signal Processing Step One - Signal Generation o Mechanical methods of reproducing sound n Microphones n Phonograph records n Tape recorders
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Steps in Signal Processing Step One - Signal Generation o Digital methods of reproducing sound n Digital audio tape (DAT)  n Compact discs (CDs and DVDs) n Minidiscs (MDs) n Computer files (MP3s)
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Understanding Television Persistence of Vision How a picture is captured by a camera Colors used to capture and display video   Interlace Scanning
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Video Signal Generation (NTSC) o Television’s ability to transmit images is  based on the technology of scanning o Standard U.S. television scans a television  picture using two fields of information for a  total of 525 lines
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Video Signal Generation (NTSC) o Each field consists of 262 1/2 horizontal  scanning lines o The two fields combine to form a single  picture called a frame
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TV Picture Reproduction Still Frames Moving  30 Frames/  sec  Frames Created from Tiny Dots  (pixels) in each line
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TV Picture Reproduction 525 Lines:  NTSC  (US, Canada, Japan,  etc.) 625 Lines:  Pal  or  Secam 1125 Lines:  HDTV
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technology and media lesson 2 - StepsinSignalProcessing

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