Browse Prior Art Database

TV Buffer

IP.com Disclosure Number: IPCOM000092359D
Original Publication Date: 1967-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

French, WK: AUTHOR

Abstract

This system is for capturing a single frame on a television set and holding it until the user releases it. The user dials a remote computer via a telephone line and, when connected, receives an assignment of an ultra high frequency UHF channel and a multiplex frame number, both consisting of two decimal digits. The user switches television set 10 to the proper UHF channel and then presses the push buttons 12 and 14 so that the proper frame is visible on monitor 22.

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TV Buffer

This system is for capturing a single frame on a television set and holding it until the user releases it. The user dials a remote computer via a telephone line and, when connected, receives an assignment of an ultra high frequency UHF channel and a multiplex frame number, both consisting of two decimal digits. The user switches television set 10 to the proper UHF channel and then presses the push buttons 12 and 14 so that the proper frame is visible on monitor 22.

The latter is accomplished by observing the frame number, e.g., in one of the corners of the television frame, and pressing push buttons 14 and 12 until the user is synchronized on the proper frame. Push buttons 12 and 14 gate sufficient energy into single-shot timing circuit 16 associated with multivibrator 18 such that the phase is skipped ten or one positions. Multivibrator 18 opens gate 20 for one frame time, 1/30 sec, and the frame is gated into monitor television set 22. The latter has a long persistency phosphore screen which stores the frame until the next regeneration comes, roughly 3 sec. later.

While locked on this frame the user can receive and transmit audio information over the telephone line and pictures can be received on television 10.

The signals for synchronizing the phase of multivibrator 18 can also be sent both ways over the telephone line so that the phase is automatically synchronized.

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