Apparatus and method to reduce PTZ latency

• US 9,398,203 B2
• Filed: 07/10/2013
• Issued: 07/19/2016
• Est. Priority Date: 07/10/2013
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Zhuang, Hanwei, Chen, Jie, Zhou, Hanjin, Huang, Zhenghong
• Primary Examiner(s): Moe, Aung S
• Assistant Examiner(s): COWAN, EUEL K
• Application Number:
  US13/938,873
• Publication Number:
  US 20150015731A1
• Time in Patent Office: 1,105 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G08B 13/19689 Remote control of cameras, e.g. remote orientation or image zooming control for a PTZ camera
• CPC Class Codes: H04N 23/62 Control of parameters via user interfaces
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 23/69 Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
• CPC Class Codes: H04N 23/695 Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

An apparatus, system, and method to reduce PTZ latency are provided. The system can include an input port and a motor driver unit, and the input port can receive a PTZ request. The input port can transmit the PTZ request to the motor driver unit, and the motor driver unit can extract a PTZ command from the PTZ request. In some embodiments, the PTZ request can obviate transmission through a parser and a processor.

Claims

1. A system comprising:

an IP PTZ camera further comprising;

an input port;

a request module coupled directly to the input port, the request module including a webpage request sub-module, an http video stream request sub-module and a control protocol request sub-module;

an http or ONVIF parser; and

a motor driver unit,

wherein the input port receives a PTZ request,

wherein the input port transmits the PTZ request to the request module, and

wherein the control protocol request sub-module of the request module extracts a PTZ command from the PTZ request received from the input port using a simple text parser and transmits the PTZ command directly to the motor driver unit without first passing the PTZ command through the http or ONVIF parser.

2. The system of claim 1 further comprising a processor, wherein the PTZ request obviates transmission through the http or ONVIF parser and the processer.

3. The system of claim 1 wherein the input port receives input that includes the PTZ request.

4. The system of claim 3 wherein the control protocol request sub-module extracts the PTZ request from the input.

5. The system of claim 1 wherein the motor driver unit includes an analyzer and a motor driver.

6. The system of claim 5 wherein the analyzer extracts the PTZ command from the PTZ request and transmits the PTZ command to the motor driver.

7. The system of claim 5 wherein the motor driver transmits the PTZ command to a motor of a PTZ camera.

8. The system of claim 7 wherein the motor of the PTZ camera executes the PTZ command.

20. The system of claim 1, wherein the control protocol request sub-module and the motor driver unit are implemented in firmware.

9. An apparatus comprising:

an IP PTZ camera further comprising;

an analyzer including a webpage request sub-module, an http video stream request sub-module and a control protocol request sub-module;

an http or ONVIF parser; and

a motor driver,

wherein the control protocol request sub-module of the analyzer extracts a PTZ command from a PTZ request received through an input port of the IP PTZ camera using a simple text parser and transmits the PTZ command to the motor driver, and

wherein the control protocol request sub-module transmits the PTZ command directly to the motor driver of the IP PTZ camera for execution of the PTZ command without first passing the PTZ command through the http or ONVIF parser.

10. The apparatus of claim 9 further comprising a housing enclosing the analyzer and the motor driver.

11. The apparatus of claim 9 wherein the analyzer receives the PTZ request from an input port or from a request module of a PTZ camera.

12. The apparatus of claim 9 wherein the PTZ request obviates transmission through the http or ONVIF parser and a processor before the analyzer receives the PTZ request.

13. A method comprising:

an IP PTZ camera receiving a PTZ request through an input port;

transmitting the received PTZ request to a request module coupled directly to the input port, wherein the request module includes a webpage request sub-module, an http video stream request sub-module and a control protocol request sub-module;

the control protocol request sub-module of the request module extracting a PTZ command from the PTZ request using a simple text parser; and

the control protocol request sub-module obviating transmission of the PTZ request through an http or ONVIF parser and a processor by transmitting the PTZ command directly to a motor drive unit of the IP PTZ camera.

14. The method of claim 13 wherein receiving the PTZ request includes receiving an input that includes the PTZ request.

15. The method of claim 14 further comprising the control protocol request sub-module extracting the PTZ request from the input.

16. The method of claim 13 wherein receiving the PTZ request includes at least one of the input port, the request module, the motor drive unit, and an analyzer receiving the PTZ request.

17. The method of claim 13 further comprising an analyzer extracting the PTZ command from the PTZ request.

18. The method of claim 13 further comprising transmitting the PTZ command to a motor driver.

19. The method of claim 18 further comprising executing the PTZ command.