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1. (WO2018224841) USING HEADSET MOVEMENT FOR COMPRESSION
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Claims

1. A method at a host device for compressing display data forming an image for display on one or more displays of a wearable headset, the method comprising:

receiving from the wearable headset, information regarding a direction of movement of the wearable headset, including the one or more displays, the direction being between a trailing position and a leading position;

if the direction of the movement is on an arc, compressing the display data forming a trailing portion of the image relative to the display data forming a leading portion of the image, when displayed on the one or more displays that are moving with the wearable headset, wherein the leading portion and the trailing portion may be of any size smaller than the whole image and may change in size on a frame to frame basis; and

forwarding the display data forming the image from the host device to the wearable headset for display on the one or more displays thereof.

2. A method according to either claim 1, wherein the information further comprises a speed of the movement and compression of the display data forming at least the trailing portion of the image is performed if a speed of the movement is above a minimum threshold.

3. A method according to claim 2, wherein compression of the display data forming the whole of the image is performed if a speed of the movement is above a minimum threshold.

4. A method according to either claim 2 or claim 3, wherein the compression of the display data forming a part of, or the whole of the image is based on the speed of the movement above the minimum threshold.

5. A method according to claim 4, wherein the compression of the display data forming a part of, or the whole of the image is increased as the speed of the movement above the minimum threshold increases.

6. A method at a host device for compressing display data forming an image for display on one or more displays of a wearable headset, the method comprising:

receiving from the wearable headset information regarding a speed of movement of the wearable headset, including the one or more displays;

if the speed of the movement is above a minimum threshold, compressing the display data by an amount based on the speed of the movement above the minimum threshold; and

forwarding the compressed display data from the host device to the wearable headset for display thereon.

7. A method according to claim 6, wherein the compression of the display data forming the image is increased as the speed of the movement above the minimum threshold increases.

8. A method according to either claim 6 or claim 7, wherein the information further comprises a direction of movement of the wearable headset, including the one or more displays, the direction being between a trailing position and a leading position, the method further comprises, if the direction of the movement is on an arc, compressing the display data forming a trailing portion of the image relative to the display data forming a leading portion of the image, when displayed on the one or more displays that are moving with the wearable headset.

9. A method according to any one of claims 1 to 5 or 8, wherein the display data forming a trailing portion of the image is compressed by a higher compression factor than the display data forming a leading portion of the image.

10. A method according to claim 9, wherein compression of the display data is increased in portions across the image in the direction from the leading portion to the trailing portion of the image.

11. A method according to any one of claims 2 to 5 or 8 to 10, wherein the trailing portion increases in size compared to the leading portion of the image as the speed of the movement above the minimum threshold increases.

12. A method according to any one of claims 2 to 5 or 8 to 1 1, further comprising, at the host device:

determining, from the information, whether the movement is on an arc or linear;

determining, from the information, the speed of the movement of the wearable headset; and

determining whether the speed of the movement is above the minimum threshold.

13. A method according to any one of claims 2 to 5 or 8 to 1 1, further comprising, at the wearable headset:

determining whether the movement of the wearable headset is on an arc or linear;

determining the speed of the movement of the wearable headset;

determining whether the speed of the movement is above the minimum threshold; and

sending the information to the host device, if the movement is on an arc and the speed is above the minimum threshold.

14. A method at a wearable headset for displaying display data forming an image on one or more displays, the method comprising:

sensing movement of the wearable headset indicative of movement of the one or more displays;

determining whether the movement is on an arc or linear;

determining the speed of the movement of the wearable headset;

determining whether the speed of the movement is above a minimum threshold;

sending information regarding the speed and direction of the movement to a host device, if the movement is on an arc and the speed is above the minimum threshold;

receiving from the host device, the display data forming the image; and

displaying the image on one or more displays.

15. A method according to claim 14, wherein the sensing movement of the wearable headset comprises using a gyroscope and an accelerometer in the wearable headset.

16. A host device configured to perform all the steps of a method according to any one of claims 1 to 13.

17. A wearable headset configured to perform all the steps of a method according to either claim 14 or claim 15.

18. A wearable headset according to claim 17, wherein the wearable headset is a virtual reality headset.

19. A method according to according to claim 17, wherein the wearable headset is an augmented reality set of glasses.

20. A system comprising a host device according to claim 16 and a wearable headset connected to the host device.