Dual deck VCR and duplicating circuit therefor
First Claim
1. A dual deck video cassette recorder, comprising:
- a. first and second video deck means in a common housing, and each having heads both of said deck means being capable of playback, and at least one of said deck means being capable of recording;
b. switch means connected with both deck means for allowing selective connections of video and audio signals between, and from the inputs to and outputs from, the two deck means;
c. means for sensing the angular position of heads of each deck means to assure they are in phase prior to initiating recording; and
d. means for correcting the angular position of the heads of at least one of said deck means to assure the heads of each will be in the same angular phase prior to initiating recording.
10 Assignments
0 Petitions
Accused Products
Abstract
A dual deck video cassette recorder, having first and second video decks in a common housing. Each deck has a plurality of heads and both of the decks can playback, and at least one of the decks can record. A switch arrangement is connected to both decks to provide for selective connections of video and audio signals between, and from the inputs to and outputs from, the two decks. A sensor detects the angular position of the heads of each deck to assure they are in phase prior to initiating recording. A mechanism corrects the angular position of the heads of at least one of the decks to assure the heads of each will be in the same angular phase prior to initiating recording. A circuit detects a copy protection signal on a tape in one deck during vertical blanking and the signal is located and timed so that it will not interfere with normal operation of the video signals, to produce a quality picture on a TV monitor or place information onto tape in one deck which provides a quality picture. A circuit is provided for ceasing, and preventing, any copying function being performed when the copy protection signal has been detected, and it also determines, after the copy protection signal has be detected, that the signals at both decks have been synchronized for a predetermined period of time.
90 Citations
14 Claims
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1. A dual deck video cassette recorder, comprising:
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a. first and second video deck means in a common housing, and each having heads both of said deck means being capable of playback, and at least one of said deck means being capable of recording; b. switch means connected with both deck means for allowing selective connections of video and audio signals between, and from the inputs to and outputs from, the two deck means; c. means for sensing the angular position of heads of each deck means to assure they are in phase prior to initiating recording; and d. means for correcting the angular position of the heads of at least one of said deck means to assure the heads of each will be in the same angular phase prior to initiating recording. - View Dependent Claims (2, 3, 4)
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5. A dual deck video cassette recorder comprising:
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a. first and second video deck means in a common housing, both of said deck means being capable of playback, and at least one of said deck means being capable of recording; b. switch means connected with both deck means for allowing selective connections of video and audio signals between, and from the inputs to and outputs from, the two deck means; c. means for detecting a copy protection signal on a tape in one deck means during vertical blanking and the signal being located and timed so that it will not interfere with normal operation of the video signals, to produce a quality picture on a TV monitor or place information onto tape in one deck means which provides a quality picture; d. means for ceasing, and preventing, any copying function being performed when the copy protection signal has been detected; and means for determining, after the copy protection signal has been detected, the length of time the signals at both deck means are synchronized for a predetermined period of time. - View Dependent Claims (6, 7)
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8. A dual deck video cassette recorder, comprising:
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a. first and second video deck means in a common housing, and each having heads both of said deck means being capable of playback, and at least one of said deck means being capable of recording; b. switch means connected with both deck means for allowing selective connections of video and audio signals between, and from the inputs to and outputs from, the two deck means; c. at least two types of duplicating circuit means, one being a Y-FM lumina 3.4-4.4 MHz and C-heterodyne process and the other a modulated duplicate or composite video; d. means for sensing the quality of the signals recorded on a source tape; e. means for connecting one of said duplicating circuit means to perform copying of the information on one tape onto anther tape in dependence upon the quality of signal tested; f. means for sensing the angular position of the heads of each deck means to assure they are in phase prior to initiating recording when the duplicating circuit means using the Y-FM lumina 3.4-4.4 MHz and C-heterodyne process is used; and g. means for correcting the angular position of the heads of at least one of said deck means to assure the heads of each will be in the same angular phase. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification