Display interface with foveal compression
A method of transporting foveal image data is disclosed. A host device receives image data from an image source and renders a full field-of-view (FFOV) image using the image data. The host device further identifies a foveal region of the FFOV image and renders a foveal image corresponding to the foveal region using the image data. More specifically, the foveal image may have a higher resolution than the foveal region of the FFOV image. The host device may then transmit each of the foveal image and the FFOV image, in its entirety, to a display device. For example, the host device may concatenate the foveal image with the FFOV image to produce a frame buffer image, and then transmit the frame buffer image to the display device.
1. A method comprising:
receiving image data from an image source;
rendering a plurality of full field-of-view (FFOV) images based on the image data;
identifying a respective foveal region in each of the plurality of FFOV images;
rendering a plurality of foveal images based on the image data, wherein each of the foveal images represents the foveal region of a respective FFOV image, and wherein each of the foveal images has a higher resolution than the foveal region of the FFOV image it represents;
transmitting, to a display device, a first frame including a first foveal image of the plurality of foveal images and a first FFOV image of the plurality of FFOV images; and
transmitting, to the display device, a second frame including a second FFOV image of the plurality of FFOV images and a second foveal image of the plurality of foveal images, wherein the first foveal image represents the foveal region of the second FFOV image, and wherein the first foveal image is configured to be displayed concurrently with the second FFOV image on a first display of the display device.
2. The method of claim 1 , wherein each foveal image of the plurality of foveal images has a same resolution as and encompasses a smaller display area than the FFOV image it represents.
3. The method of claim 1 , wherein the first frame is transmitted at a first time, and wherein the second frame is transmitted at a second time subsequent to the first time.
4. The method of claim 1 , wherein the first foveal image is concatenated with the first FFOV image in the first frame, and wherein the second FFOV image is concatenated with the second foveal image in the second frame.
5. The method of claim 1 , further comprising:
transmitting, to the display device, a third frame including a third foveal image of the plurality of foveal images and a third FFOV image of the plurality of FFOV images, wherein the second foveal image represents the foveal region of the third FFOV image.
6. The method of claim 5 , wherein the second foveal image is configured to be displayed concurrently with the third FFOV image on a second display of the display device.
7. A device, comprising:
an input to receive image data from an image source;
a rendering engine configured to:
render a plurality of full field-of-view (FFOV) images based on the image data;
identify a respective foveal region in each of the plurality of FFOV images; and
render a plurality of foveal images based on the image data, wherein each of the foveal images represents the foveal region of a respective FFOV image, and wherein each of the foveal images has a higher resolution than the foveal region of the FFOV image it represents; and
an image transport interface configured to:
transmit, to a display device, a first frame including a first foveal image of the plurality of foveal images and a first FFOV image of the plurality of FFOV images; and
transmit, to a display device, a second frame including a second FFOV image of the plurality of FFOV images and a second foveal image of the plurality of foveal images, wherein the first foveal image represents the foveal region of the second FFOV image, and wherein the first foveal image is configured to be displayed concurrently with the second FFOV image on a first display of the display device.
8. The device of claim 7 , wherein each foveal image of the plurality of foveal images has a same resolution as and encompasses a smaller display area than the FFOV image it represents.
9. The device of claim 7 , wherein the first frame is transmitted at a first time, and wherein the second frame is transmitted at a second time subsequent to the first time.
10. The device of claim 7 , wherein the first foveal image is concatenated with the first FFOV image in the first frame, and wherein the second FFOV image is concatenated with the second foveal image in the second frame.
11. The device of claim 10 , wherein the image transport interface is further configured to:
transmit, to the display device, a third frame including a third foveal image of the plurality of foveal images and a third FFOV image of the plurality of FFOV images, wherein the second foveal image represents the foveal region of the third FFOV image.
12. The device of claim 11 , wherein the second foveal image is configured to be displayed concurrently with the third FFOV image on a second display of the display device.