Synchronous duplicate video recording apparatus
First Claim
1. A synchronous duplicate video recording apparatus for use with master video recording apparatus including video camera means providing a first video signal to be recorded, the video signal representative of a sequence of video frames, first video recording means connected to the video camera means for receiving the first video signal for recording and for receiving first and second control signals provided by the camera means for respectively starting and stopping recording of the first video signal, and the first video recording means providing a time-code signal and combining the time-code signal with the first video signal to provide an original video-recording, the time-code signal for uniquely identifying each of said video frames but not visible therein when the original-video recording is replayed, the synchronous duplicate video apparatus comprising:
- means for receiving the first and second control signals, the video signal and the time-code signal;
time-code writing means for combining the time-code signal with the first video signal to provide a second video signal for forming a duplicate video-recording including each of the video frames of the original video-recording, the time-code combined with the first video signal such that it will be visible in each of the video frames when said duplicate video-recording is replayed;
second video recording means for recording said second video signal to form the duplicate video-recording, said second video recording means responsive to a third control signal, said third control signal for starting and stopping recording by said second video recording means; and
control signal converting means for converting the first and second control signals into said third control signal, the first and second control signals thereby synchronously starting and stopping the recording by the first video recording means and said second video recording means.
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Abstract
Video recording apparatus (10) includes master video apparatus (12) including a video camera(16) and a master video recording device (18). The master video recording device is respectively started and stopped by respectively first and second signals (S1 and S2) provided by the camera. The master recording device produces an original video recording. The original video recording includes a time-code (TC) which is not visible in frames of the original recording when it is replayed. A synchronous duplicate video recording apparatus (14) includes a duplicate video recording device (26) and is connected to the master video recording apparatus. The duplicate video recording device provides a duplicate video recording including the time-code. The time-code is visible in frames of the duplicate recording when it is replayed. The synchronous duplicate video recording apparatus includes circuitry (28) which enables the master and duplicate video recording devices to be started and stopped synchronously.
19 Citations
12 Claims
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1. A synchronous duplicate video recording apparatus for use with master video recording apparatus including video camera means providing a first video signal to be recorded, the video signal representative of a sequence of video frames, first video recording means connected to the video camera means for receiving the first video signal for recording and for receiving first and second control signals provided by the camera means for respectively starting and stopping recording of the first video signal, and the first video recording means providing a time-code signal and combining the time-code signal with the first video signal to provide an original video-recording, the time-code signal for uniquely identifying each of said video frames but not visible therein when the original-video recording is replayed, the synchronous duplicate video apparatus comprising:
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means for receiving the first and second control signals, the video signal and the time-code signal; time-code writing means for combining the time-code signal with the first video signal to provide a second video signal for forming a duplicate video-recording including each of the video frames of the original video-recording, the time-code combined with the first video signal such that it will be visible in each of the video frames when said duplicate video-recording is replayed; second video recording means for recording said second video signal to form the duplicate video-recording, said second video recording means responsive to a third control signal, said third control signal for starting and stopping recording by said second video recording means; and control signal converting means for converting the first and second control signals into said third control signal, the first and second control signals thereby synchronously starting and stopping the recording by the first video recording means and said second video recording means. - View Dependent Claims (2, 3, 4, 5)
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6. A video recording apparatus, comprising:
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master video recording apparatus including video camera means for providing a first video signal to be recorded, said video signal representative of a sequence of video frames, first video recording means connected to said video camera means for receiving said first video signal for recording, and for receiving first and second control signals provided by said camera means for respectively starting and stopping recording of said first video signal by said first video recording means; said first video recording means providing a time-code signal and combining said time-code signal with said first video signal to provide an original video-recording, said time-code signal for uniquely identifying each of said video frames, but not visible therein when said original video-recording is replayed; said synchronous duplicate video recording apparatus including means for receiving said first and second control signals, said video signal and said time-code signal; said synchronous duplicate video recording apparatus including time-code writing means for combining said time-code signal with said first video signal to provide a second video signal for forming a duplicate video-recording including each of the video frames of the original video recording, the time-code combined with the first video signal such that it will be visible in each of the video frames when said duplicate video-recording is replayed; said synchronous duplicate video recording apparatus including second video recording means for recording said second video signal to form said duplicate video recording, said second video recording means responsive to a third control signal, said third control signal for starting and stopping recording of said second video signal by said second video recording means; and control signal converting means for converting the first and second control signals into said third control signal, the first and second control signals thereby synchronously starting and stopping recording by said first and second video recording means. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A video recording apparatus, comprising:
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master video recording apparatus including video camera means for providing a first video signal to be recorded, said video signal representative of a sequence of video frames, first video recording means connected to said video camera means for receiving said first video signal for recording, and for receiving first and second control signals provided by said camera means for respectively starting and stopping recording of said first video signal by said first video recording means; said first video recording means providing a time-code signal and combining said time-code signal with said first video signal to provide an original video recording; synchronous duplicate video recording apparatus including time-code generating means for generating a time-code signal for uniquely identifying each of said video frames, said synchronous duplicate video recording means connected to said master video recording means for receiving the first and second control signals and the video signal therefrom, and for transmitting the time-code signal thereto, and said time-code generating means responsive to said first signal for starting generation of said time-code and to said second signal for stopping generation of said time-code; said time-code signal and said first video signal recorded by said first video recording apparatus to provide an original video recording in which the recorded time-code is not visible in the video frames when the recording is replayed; said, time-code generating means combining said time-code signal with said first video signal to provide a second video signal for forming a duplicate video recording including each of the video frames of the original video recording, the time-code combined with the first video signal such that it will be visible in each of the video frames when said duplicate video recording is replayed; said synchronous duplicate video recording apparatus including second video recording means for recording said second video signal to form said duplicate video recording, said second video recording means responsive to a third control signal, said third control signal for starting and stopping recording of said second video signal by said second video recording means; and control signal converting means for converting the first and second control signals into said third control signal, the first and second control signals thereby synchronously starting and stopping recording by said first and second video recording means.
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Specification