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Could you please tell me about different types of audio and video formats?

Asked by rami reddy, 08 Jul '07 10:45 am
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Year Media formats Recording formats
==== =========== ================
1877 Phonograph cylinder Mechanical analog; "hill-and-dale" grooves, vertical stylus motion
1883 Music roll Mechanical digital
1895 Gramophone record Mechanical analog; lateral grooves, horizontal stylus motion
1898 Wire recording Analog; magnetization; no "bias"
1930s Reel-to-Reel, Magnetic Tape Analog; magnetization; "bias" dramatically increases linearity/fidelity
1948 Vinyl Record Analog, with preemphasis and other equalization techniques (LP, RIAA). Lateral grooves, horizontal stylus motion.
1957 Stereophonic Vinyl Record Analog, with preemphasis and other equalization techniques. Combination lateral/vertical stylus motion with each channel encoded 45 degrees to the vertical.
1962 4-Track Analog, 1/4 inch wide tape, 3 3/4 inches/sec, endless loop cartridge.
1963 Compact Cassette Analog, with bias, preemphasis, 0.15 inch wide tape, 17/8 inches/sec. 1970: introduced Dolby noise redu ...more
Answered by LALITKUMAR RANA, 08 Jul '07 10:49 am

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