Networked surveillance and control system
First Claim
Patent Images
1. A surveillance and control system, comprising:
- a feature extraction unit to extract low-level features from a compressed digital video signal;
a description encoder, coupled to the feature extraction unit, to encode the low-level features as content descriptors;
an event detector, coupled to the description encoder, to detect security events from the content descriptors; and
a control signal processor, coupled to the event detector, to generate control signals in response to detecting the security events.
1 Assignment
0 Petitions
Accused Products
Abstract
A surveillance and control system includes a feature extraction unit to dynamically extract low-level features from a compressed digital video signal, a description encoder, coupled to the feature extraction unit, to encode the low-level features as content descriptors. An event detector is coupled to the description encoder to detect security events from the content descriptors, and a control signal processor, coupled to the event detector, to generate control signals in response to detecting the security events.
251 Citations
16 Claims
-
1. A surveillance and control system, comprising:
-
a feature extraction unit to extract low-level features from a compressed digital video signal;
a description encoder, coupled to the feature extraction unit, to encode the low-level features as content descriptors;
an event detector, coupled to the description encoder, to detect security events from the content descriptors; and
a control signal processor, coupled to the event detector, to generate control signals in response to detecting the security events. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
a memory unit to store the compressed digital video signal, the content descriptors, the control signals, user input, and user configuration preferences.
-
-
5. The surveillance and control system of claim 1 further comprising:
a symbol processor, coupled to the feature extraction unit, to extract motion vectors and macroblocks and DCT coefficients from the compressed digital video signal.
-
6. The surveillance and control system of claim 4 further comprising:
a bitstream processor, connected to the memory unit, to produce an output compressed digital video signal including the compressed digital video signal and the content descriptors.
-
7. The surveillance and control system of claim 6 herein the output compressed digital video signal is transmitted to a remote video receiver via a network.
-
8. The surveillance and control system of claim 1 wherein the content descriptors are encoded according to a video encoding standard.
-
9. The surveillance and control system of claim 1 wherein the encoder generate a summary of the compressed digital video signal according to the content descriptors.
-
10. The surveillance and control system of claim 9 wherein the summary of the compressed digital video signal is stored in a memory unit.
-
11. The surveillance and control system of claim 1 wherein the content descriptors are based on motion activity in the compressed digital video signal.
-
12. The surveillance and control system of claim 1 further comprising at least one camera, a monitor, a video recorder, a telephone, a storage device, a personal computer, a digital versatile disk, and a remote PC all connected to each other by a network and operated by the control signals.
-
13. The surveillance and control system of claim 1 wherein the control signals include security contact information, device control parameters, and routing information.
-
14. The surveillance and control system of claim 1 wherein a normal non-zero state is distinguished from an abnormal non-zero state in the compressed digital video signal to detect the security events.
-
15. The surveillance and control system of claim 1 wherein the control signals have associated priorities.
-
16. A method for responding to security events, comprising:
-
dynamically extracting low-level features from a compressed digital video signal;
encoding low-level features as content descriptors;
detect security events from the content descriptors; and
generating control signals in response to detecting the security events.
-
Specification