APPARATUS AND METHOD FOR MULTI-STREAMING FOR MORE THAN THREE PIXEL COMPONENT VALUES

• US 20120281150A1
• Filed: 09/30/2011
• Published: 11/08/2012
• Est. Priority Date: 05/05/2011
• Status: Active Grant

• Current Assignee: ATI Technologies ULC (Advanced Micro Devices, Inc.)
• Original Assignee: ATI Technologies ULC (Advanced Micro Devices, Inc.)
• Inventors: Glen, David I.J.
• Granted Patent: US 8,681,170 B2
• Time in Patent Office: Days
• US Class Current: 348/739
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2352/00 Parallel handling of streams of display data
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 2370/10 Use of a protocol of communication by packets in interfaces along the display data pipeline
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: G09G 5/04 using circuits for interfacing with colour displays
• CPC Class Codes: G09G 5/397 Arrangements specially adapted for transferring the contents of two or more bit-mapped memories to the screen simultaneously, e.g. for mixing or overlay G09G5/02 takes precedence
• CPC Class Codes: H04N 21/43632 involving a wired protocol, e.g. IEEE 1394 high-speed IEEE 1394 serial bus H04L12/40052

Abstract

A method and apparatus provides pixel information for one or more displays by producing for output on a single link, packet based pixel component multi-stream information on two or more streams. A first stream may include a portion of per-pixel component values, such as RGB pixel component values, whereas the second stream of the multi-stream may include a remaining portion of the per-pixel component values, such as a corresponding alpha value. Hence, multi-streams are employed to communicate, for example, an extended pixel component format for output to one or more displays. The multi-streams are synchronized to provide the pixel component values at a proper time for the receiving display or plurality of displays.

Claims

1. A method for providing pixel information for one or more displays comprising:

producing, for output on a single link, packet based pixel component multi-stream information comprising a first stream that comprises a portion of pixel component values for a pixel and a second stream that comprises a remaining portion of the per pixel component values for the pixel, as image stream information for output to one or more displays.

2. The method of claim 1 wherein producing the packet based pixel component multi-stream information produces the first stream that comprises color component data and produces the second stream that comprises extended pixel data corresponding to the color component data of the pixel.

3. The method of claim 2 wherein the first portion of the per pixel component values comprises RGB component values and wherein the remaining portion of the per pixel component values is comprised of corresponding alpha information and wherein producing packet based multi-stream information comprises packing the RGB component values for the pixel into packets in the first stream and packing the corresponding alpha information in the second stream.

4. The method of claim 2 wherein the first portion of the per pixel component values comprises YUV component values and wherein the remaining portion of the per pixel component values is comprised of corresponding alpha information and wherein providing packet based multi-stream information comprises packing the YUV component values for the pixel into packets in the first stream and packing the corresponding alpha information in the second stream.

5. The method of claim 1 comprising changing to a multi-stream pixel component packing mode from a non multi-stream pixel component packing mode based on a type of display system and outputting the packet based pixel component multi-stream information over the single link to the display system and producing a display based on the packet based pixel component multi-stream information.

6. The method of claim 2 wherein obtaining the pixel component values of the pixel comprises controlling a first display controller to obtain only the color component data of the pixel from memory and controlling a second display controller to obtain only the corresponding remaining portion of the per pixel component values for the pixel from memory.

7. The method of claim 1 comprising selecting which of a plurality of different display controllers obtain and output respective color pixel component values and remaining portion of the per pixel component values to a pixel component multi-stream encoder wherein the color component values and remaining portion of the per pixel component values comprise at least five components per pixel.

8. The method of claim 1 comprising:

receiving the packet based multi-component multi-stream information produced by the pixel component multi-stream encoder;

combining from the first and second stream, the portion of the per-pixel component values and the remaining portion of the per-pixel component values as complete pixel component values for each pixel of a frame; and

producing a display image frame on a display using the complete pixel component values based on the combined information from the first and second stream.

9. An apparatus for providing pixel information for one or more displays comprising:

a pixel component multi-stream encoder operative to produce, for output on a single link, packet based pixel component multi-stream information comprising a first stream that comprises for a pixel, a portion of the per pixel component values and a second stream that comprises, for the pixel, a remaining portion of the per pixel component values, as image stream information for output to one or more displays.

10. The apparatus of claim 9 wherein the pixel component multi-stream encoder is operative to produce the first stream to comprise color component data and produces the second stream to comprise extended pixel data corresponding to the color component data of the pixel.

11. The apparatus of claim 10 wherein the first portion of the per pixel component values comprises RGB component values and wherein the remaining portion of the per pixel component values is comprised of corresponding alpha information and wherein the pixel component multi-stream encoder is operative to produce packet based multi-stream information by packing the RGB component values for the pixel into packets in the first stream and packing the corresponding alpha information in the second stream.

12. The apparatus of claim 10 wherein the first portion of the per pixel component values comprises YUV component values and wherein the remaining portion of the per pixel component values is comprised of corresponding alpha information and wherein the pixel component multi-stream encoder is operative to pack the YUV component values for the pixel into packets in the first stream and pack the corresponding alpha information in the second stream.

13. The apparatus of claim 9 comprising logic operative to change the pixel component multi-stream encoder to a multi-stream pixel component packing mode from a non multi-stream pixel component packing mode based on a type of display that is used to display the pixel information and cause the pixel component multi-stream encoder to output the packet based pixel component multi-stream information for communication over the single link to the display system.

14. The apparatus of claim 13 comprising the display system operative to produce a display image based on the packet based pixel component multi-stream information.

15. The apparatus of claim 10 comprising at least a first and second display controller operative to obtain pixel component values of a pixel an image frame, wherein the at least first display controller is operative to obtain only the color component data of the pixel from memory and wherein the at least second display controller is operative to obtain only the corresponding remaining portion of the per pixel component values for the pixel from memory.

16. The apparatus of claim 15 comprising logic operative to select which of the plurality of first and second display controllers output respective color pixel component values and remaining portion of the per pixel component values to the pixel component multi-stream encoder based on a type of display.

17. An apparatus comprising:

a display; and

logic operatively coupled to the display and operative to produce a display image, for output on the display, based on packet based pixel component multi-stream information comprising a first stream that comprises for a pixel, a portion of per pixel component values and a second stream that comprises a remaining portion of the per pixel component values, as image stream information.

18. A video display system comprising:

an apparatus for providing pixel information for one or more displays comprising;

at least a first and second display controller operative to obtain pixel component values of a pixel for an image frame; and

a pixel component multi-stream encoder operative to produce from the obtained pixel component values from the at least first and second display controller, for output on a single link, packet based pixel component multi-stream information comprising a first stream that comprises for the pixel, a portion of the per pixel component values and a second stream that comprises, for the pixel, a remaining portion of the per pixel component values, as image stream information for output to one or more displays; and

at least one display operative to receive the packet based multi-component multi-stream information produced by the pixel component multi-stream encoder and operative to combine from the first and second stream, the portion of the per-pixel component values and the remaining portion of the per-pixel component values has complete pixel component values for each pixel of a frame and operative to produce a display image frame on a display using the complete pixel component values based on the combined information from the first and second stream.

19. An apparatus for providing pixel information for one or more displays comprises at least one display controller operative to obtain pixel component values of a pixel for an image stream;

and an encoder operative to produce for output on a single link, packet based pixel component multi-stream information comprising a first stream that comprises a portion of the per pixel component values and a second stream that comprises a remaining portion of the per pixel component values, as image stream information for output to one or more displays.