Data filter for haptic feedback devices having low-bandwidth communication links

• US 6,933,920 B2
• Filed: 09/24/2002
• Issued: 08/23/2005
• Est. Priority Date: 09/24/2001
• Status: Active Grant

• Current Assignee: Immersion Corporation
• Original Assignee: Immersion Corporation
• Inventors: Lacroix, Robert, Braun, Adam C.
• Primary Examiner(s): Lefkowitz, Sumati
• Assistant Examiner(s): GOOD JOHNSON, MOTILEWA
• Application Number:
  US10/254,340
• Publication Number:
  US 20030058216A1
• Time in Patent Office: 1,064 Days
• Field of Search: 345700-702, 345/156
• US Class Current: 345/156
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user

Abstract

Embodiments of the present invention provide computer program products, methods, and systems for use with low speed processors and/or low-bandwidth communication links. Embodiments of the present invention allows low-bandwidth communication links to proceed at a level similar to a high-bandwidth communication link by filtering data that the filter deems contains substantially identical haptic feedback parameters as a previously transmitted data.

Claims

1. A method of filtering data, the method comprising:

transmitting a first data comprising haptic feedback parameters before transmitting a second data comprising haptic feedback parameters;

determining whether the second data contains substantially identical haptic feedback parameters as the first data; and

filtering the second data on a determination that the second data has substantially identical haptic feedback parameters as the first data.

2. The method of claim 1 wherein filtering the second data is carried out before the second data is transmitted from a host computer system over a communication link to a haptic feedback interface device.

3. The method of claim 1 wherein filtering the second data is carried out after the second data is transmitted from a host computer system over a communication link to a haptic feedback interface device.

4. The method of claim 1 wherein determining whether the second data contains substantially identical haptic feedback parameters as the first data comprises:

determining whether the haptic feedback parameter of the second data are within a predetermined percentile difference from the haptic feedback parameter of the first data, and

upon determining that the second data is within the predetermined percentile difference, maintaining a haptic feedback output of the first data.

5. The method of claim 1 comprising:

monitoring a data transmission queue from a host computer system to a haptic feedback interface device; and

queuing the second data if the amount of data waiting in the data transmission queue is below a threshold level, even if the second data has substantially identical haptic feedback parameters as the first data.

6. The method of claim 5 wherein the threshold level depends on an expected bandwidth of a communication link between the host computer system and the haptic feedback interface device.

7. The method of claim 1 wherein filtering the second data comprises:

preventing the second data from being transmitted to a haptic feedback interface device; and

simulating successful queuing of the second data in a transmission queue to the haptic feedback interface device.

8. The method of claim 1 wherein filtering the second data comprises:

dropping information from the second data that is redundant from the first data; and

transmitting information from the second data that is not redundant from the first data.

9. A computer usable medium having computer readable program code embodied in the computer usable medium, said computer readable program code comprising:

code for transmitting a first data comprising haptic feedback parameters before transmitting a second data comprising haptic feedback parameters;

code for determining whether the second data contains substantially identical haptic feedback parameters as the first data; and

code for filtering the second data on the determination that the second data has substantially identical haptic feedback parameters as the first data.

10. The computer usable medium of claim 9 wherein the computer usable medium is stored in a memory on a host computer system and is processed by a processor on the host computer system.

11. The computer usable medium of claim 9 wherein the computer usable medium is stored in a local memory on a haptic feedback interface device and is processed by a local processor coupled to the haptic feedback interface device.

12. The computer usable medium of claim 9 further comprising code for monitoring a queue between a host computer system and a haptic feedback interface device coupled to the host computer system,

wherein the code for filtering is further configured to transmit the second data even if the second data has substantially identical haptic feedback parameters as the first data, upon the determination that the queue between the host computer system and haptic feedback interface device is below a threshold level.

13. The computer usable medium of claim 9 wherein the code for determining whether the second data contains substantially identical haptic feedback parameters as the first data is further programmed to determine whether the haptic feedback parameter of the second data is within a predetermined percentile difference as compared to the haptic feedback parameter of the first data.

14. The computer usable medium of claim 9 wherein the code for filtering the second data is further configured to prevent transmission of the second data and to simulate successful queuing of the second data in a transmission queue to a haptic feedback interface device.

15. The computer usable medium of claim 9 wherein the code for filtering the second data is configured to filter information from the second data that is redundant from the first data and to transmit information from the second data that is not redundant from the first data.

16. A haptic feedback system for filtering data, the system comprising:

a host computer system for transmitting a first data and a second data that comprise haptic feedback parameters;

a haptic feedback interface device coupled to the host computer system and configured to receive the first data and second data from the host computer system,

wherein the host computer system is configured to determine whether the second data contains substantially identical haptic feedback parameters as the first data and filtering the second data to the haptic feedback interface device on the determination that the second data has substantially identical haptic feedback parameters as the first data.

17. The haptic feedback system of claim 16 wherein filtering the second data comprises preventing transmission of the second data.

18. The haptic feedback system of claim 16 wherein filtering comprises preventing transmission of information from the second data that is redundant from the first data and transmitting information from the second data that is not redundant from the first data.

19. The haptic feedback system of claim 16 wherein the host computer system is further configured to monitor an amount of data in a transmission queue to the haptic feedback interface device and allow the second data to enter the transmission queue if there is less than a threshold level of data in the transmission queue, even if the first data and second data have substantially identical haptic feedback parameters.

20. The haptic feedback system of claim 19 wherein the threshold level of data is dependent on at least one of a processing power of the haptic feedback interface device and a bandwidth of a communication link between the host computer system and the haptic feedback interface device.

21. The haptic feedback system of claim 16 wherein the host computer system determines whether the second data contains substantially identical haptic feedback parameters as the first data by determining whether the haptic feedback parameters of the second data is within a predetermined percentile difference from the haptic feedback parameters of the first data.

22. A method of filtering data, the method comprising:

monitoring a transmission queue between a host computer system and a haptic feedback interface device; and

filtering a second data that contains substantially identical haptic feedback parameters as a previously transmitted first data on the determination that the amount of data in the transmission queue between the host computer system and the haptic feedback interface device is above a threshold level.

23. The method of claim 22 wherein filtering the second data is carried out before the second data is transmitted from the host computer system over a communication link to the haptic feedback interface device.

24. The method of claim 22 wherein the threshold level depends on at least one of a processing power of the haptic feedback interface device and an expected bandwidth of a communication link between the host computer system and the haptic feedback interface device.

25. The method of claim 22 comprising queuing the second data in the transmission queue on the determination that the transmission queue is below the threshold level.

26. A computer usable medium having computer readable program code embodied in the computer usable medium, said computer readable program code comprising:

code for monitoring a transmission queue between a host computer system and a haptic feedback interface device; and

code for filtering a second data that contains substantially identical haptic feedback parameters as a previously transmitted first data on the determination that the amount of data in the transmission queue between the host computer system and the haptic feedback interface device is above a threshold level.

27. The computer usable medium of claim 26 wherein the threshold level depends on at least one of a processing power of the haptic feedback interface device and an expected bandwidth of a communication link between the host computer system and the haptic feedback interface device.

28. The computer usable medium of claim 26 comprising code for queuing the second data on the determination that the transmission queue is below the threshold level.

29. A haptic feedback system for filtering data, the system comprising:

a host computer system for transmitting a first data and a second data that comprise haptic feedback parameters;

a haptic feedback interface device coupled to the host computer system and configured to receive data from the host computer system,

wherein the host computer system is configured monitor a transmission queue between a host computer system and a haptic feedback interface device and filter a second data that contains substantially identical haptic feedback parameters as a previously transmitted first data on the determination that the amount of data in the transmission queue between the host computer system and the haptic feedback interface device is above a threshold level.

30. The haptic feedback system of claim 29 further comprising a communication link coupling the host computer system to the haptic feedback interface device, wherein the threshold level is dependent on at least one of a processing power of the haptic feedback interface device and a bandwidth of the communication link between the host computer system and the haptic feedback interface device.