Installation and method for freezing audiovisual datastreams
First Claim
1. An installation for freezing an audiovisual data stream, comprising means (3) for generating a video stuffing signal (VIDSTUFF) and a video freeze control (2) provided with at least a first video input (2a) for receiving a freeze command signal (FR) and with a video output (2f) for supplying a video stop signal (VS) to stop the reading of a video signal (VID) from a memory (1) at a predetermined point in time, after the freeze command signal (FR) has been received, said video freeze control (2) being provided with means (8;
- 15) to detect predetermined markers in said video signal (VID) and to supply a corresponding video control signal (VSC) whenever such a marker has been detected, and by controllable video switching means (4) provided with at least a first video switch input (C) for receiving the video stuffing signal (VIDSTUFF), a second video switch input (A) for receiving the video signal (VID) read from the memory (1), a video control input for receiving the said video control signal (VSC) and a video switch output for supplying a video output signal (VO), which video switching means (4) are equipped to connect the video switch output to either the first (C) video switch input or the second video switch input (A) depending on the video control signal (VSC).
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Accused Products
Abstract
Installation and method for freezing audiovisual data streams, which installation comprises a video freeze control (2) which in equipped to receive a freeze command signal (FR) to be generated by a user and to detect a predetermined marker in a videosignal read from a memory (1), and, after receipt of the freeze command signal and detection of the marker, to supply a video control signal (VSC) for a video switch (4) and a video stop signal (VS) to interrupt reading of the video signal (VID), which video switch comprises a first input, to which the video signal (VID) read out is fed, and a second input, which is connected to a video stuffing generator which generates a video stuffing signal (VIDSTUFF), wherein the video switch (4) connects its output to the second input if this receives the video control signal (VSC) and otherwise connects its output to the first input; at the point in time when reading of the video signal is interrupted, reading of an associated audio signal (AUD), if applicable, is also interrupted.
29 Citations
15 Claims
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1. An installation for freezing an audiovisual data stream, comprising means (3) for generating a video stuffing signal (VIDSTUFF) and a video freeze control (2) provided with at least a first video input (2a) for receiving a freeze command signal (FR) and with a video output (2f) for supplying a video stop signal (VS) to stop the reading of a video signal (VID) from a memory (1) at a predetermined point in time, after the freeze command signal (FR) has been received, said video freeze control (2) being provided with means (8;
- 15) to detect predetermined markers in said video signal (VID) and to supply a corresponding video control signal (VSC) whenever such a marker has been detected, and by controllable video switching means (4) provided with at least a first video switch input (C) for receiving the video stuffing signal (VIDSTUFF), a second video switch input (A) for receiving the video signal (VID) read from the memory (1), a video control input for receiving the said video control signal (VSC) and a video switch output for supplying a video output signal (VO), which video switching means (4) are equipped to connect the video switch output to either the first (C) video switch input or the second video switch input (A) depending on the video control signal (VSC).
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for freezing an audiovisual data stream comprising at least a video signal (VID) read from a memory (1), comprising the following steps:
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a. generation of a freeze command signal (FR); b. stopping reading of the video signal (VID) from the memory (1) in dependence on said freeze command signal (FR) and supplying a video stuffing signal (VIDSTUFF) from that point in time; wherein step b comprises the following sub-steps; b1. detection of a predetermined marker in a video signal (VID) read from a memory (1); b2. supply of a video detector output signal (VIDHIT;
ZERO) as soon as said marker has been detected;b3. stopping reading of the video signal (VID) from the memory (1) as soon as both the freeze command signal (FR) and the video detector output signal (VIDHIT;
ZERO) have been generated and generation of a video stuffing signal (VIDSTUFF) from that point in time. - View Dependent Claims (15)
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Specification