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This allows use of the entire width of the tape, storing much more data per inch of tape, compared to the fixed head used in audio tape recording, which records a single track down the tape. The heads move across the tape at the high speed necessary to record the high-bandwidth video signal, but the tape moves at a slower speed through the machine.
The linear speed of the tape is slower than the speed of the head chips, allowing high frequency signals to be read or recorded, such as video. As the tape moves linearly or length-wise, the head chips move across the width of the tape in a diagonal path. Due to geometry, this allows for high head chip speeds, known as writing speeds, to be ...
The capstan tape speed is 3.7 inches per second, which provided a long record time of up to five hours on large reels. The units were 100% solid state . The Ampex 2-inch helical VTRs were popular, as they were priced much less than the 2-inch quadruplex videotape recorders used in the broadcast television industry at the time.
Internals of Ampex Fine Line F-44, a 3-head Ampex home-use audio tape recorder, c. 1965 AMPEX model 300 half-inch three-track recorder AMPEX 440 (2tr, 4tr) & 16-track MM 1000. The company's first tape recorder, the Ampex Model 200A, was first shipped in April 1948. The first two units, serial numbers 1 and 2, were used to record Bing Crosby's ...
IVC 9000 (NTSC and PAL unit, could record for 2 hours on one 10.5 inch reel) IVC 9000-4 (4 ips tape speed, Long Play, could record and play back 4 hours on one 10.5 inch reel; IVC 9000-W (8 MHz record and playback for super bandwidth) IVC 9000-M (could record and playback video in the 655-line/48 field per second (24 frame/s) video standard)
The control track is used to fine-tune the tape speed during playback, so that the high speed rotating heads remained exactly on their helical tracks rather than somewhere between two adjacent tracks (known as "tracking"). Since good tracking depends on precise distances between the rotating drum and the fixed control/audio head reading the ...
In the case of VHS, a linear control track at the tape's lower edge holds pulses that mark the beginning of every frame of video; these are used to fine-tune the tape speed during playback and to get the rotating heads exactly on their helical tracks rather than having them end up somewhere between two adjacent tracks. However, the exact ...
2-inch quadruplex videotape (also called 2" quad video tape or quadraplex) was the first practical and commercially successful analog recording video tape format. [1] It was developed and released for the broadcast television industry in 1956 by Ampex , an American company based in Redwood City, California . [ 2 ]