Television Electronic Disc - Revision history

Dan Tobias at 00:26, 25 May 2013

2013-05-25T00:26:20Z

Dan Tobias at 20:03, 9 December 2012

2012-12-09T20:03:32Z

Dan Tobias: Created page with "{{FormatInfo |formattype=physical |released=1975 }} The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not..."

2012-12-09T20:03:00Z

Created page with "{{FormatInfo |formattype=physical |released=1975 }} The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not..."

New page

{{FormatInfo
|formattype=physical
|released=1975
}}

The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not read optically by a laser, but actually used grooves, similar in theory to those of a [[gramophone record]], though these were much narrower and tighter than record grooves, and read at a much faster rotation speed (1500 RPM). They were read using a pressure pick-up which used a piezo-electric crystal to translate the groves to an electric signal. 8 and 12 inch discs were used; in the original design 8-inch discs held only 5 minutes of video and 12-inch discs 7 1/2 minutes, but this was doubled by the time the format was actually released. This still required multiple discs even for a TV episode, let alone a feature film.

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-The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not read optically by a laser, but actually used grooves, similar in theory to those of a [[gramophone record]], though these were much narrower and tighter than record grooves, and read at a much faster rotation speed (1500 RPM). They were read using a pressure pick-up which used a piezo-electric crystal to translate the groves to an electric signal. 8 and 12 inch discs were used; in the original design 8-inch discs held only 5 minutes of video and 12-inch discs 7 1/2 minutes, but this was doubled by the time the format was actually released. This still required multiple discs even for a TV episode, let alone a feature film.
+The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not read optically by a laser, but actually used grooves, similar in theory to those of a [[gramophone record]], though these were much narrower and tighter than record grooves, and read at a much faster rotation speed (1500 RPM). They were read using a pressure pick-up which used a piezo-electric crystal to translate the grooves to an electric signal. 8 and 12 inch discs were used; in the original design 8-inch discs held only 5 minutes of video and 12-inch discs 7 1/2 minutes, but this was doubled by the time the format was actually released. This still required multiple discs even for a TV episode, let alone a feature film.
 == References ==
 * [http://en.wikipedia.org/wiki/Television_Electronic_Disc Television Electronic Disc (Wikipedia)]

← Older revision		Revision as of 20:03, 9 December 2012
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	The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not read optically by a laser, but actually used grooves, similar in theory to those of a [[gramophone record]], though these were much narrower and tighter than record grooves, and read at a much faster rotation speed (1500 RPM). They were read using a pressure pick-up which used a piezo-electric crystal to translate the groves to an electric signal. 8 and 12 inch discs were used; in the original design 8-inch discs held only 5 minutes of video and 12-inch discs 7 1/2 minutes, but this was doubled by the time the format was actually released. This still required multiple discs even for a TV episode, let alone a feature film.		The '''Television Electronic Disc''' (TeD) was an early variety of videodisc. Unlike other videodisc varieties, it was not read optically by a laser, but actually used grooves, similar in theory to those of a [[gramophone record]], though these were much narrower and tighter than record grooves, and read at a much faster rotation speed (1500 RPM). They were read using a pressure pick-up which used a piezo-electric crystal to translate the groves to an electric signal. 8 and 12 inch discs were used; in the original design 8-inch discs held only 5 minutes of video and 12-inch discs 7 1/2 minutes, but this was doubled by the time the format was actually released. This still required multiple discs even for a TV episode, let alone a feature film.
		+
		+	== References ==
		+	* [http://en.wikipedia.org/wiki/Television_Electronic_Disc Television Electronic Disc (Wikipedia)]