Low latency wireless display for graphics

• US 9,503,771 B2
• Filed: 02/02/2012
• Issued: 11/22/2016
• Est. Priority Date: 02/04/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Raveendran, Vijayalakshmi R., Shaukat, Fawad, Wang, Xiaodong
• Primary Examiner(s): Alcon, Fernando
• Application Number:
  US13/364,801
• Publication Number:
  US 20130047189A1
• Time in Patent Office: 1,755 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2350/00 Solving problems of bandwidth in display systems
• 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 2370/16 Use of wireless transmission of display information
• CPC Class Codes: H04N 21/23 Processing of content or additional data; Elementary server operations; Server middleware
• CPC Class Codes: H04N 21/25825 involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/41265 having a remote control device for bidirectional communication between the remote control device and client device unidirectional remote control device H04N21/42204
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

As part of a communication session, a wireless source device can transmit video component data and metadata to a wireless sink device. The wireless source device can intercept the video component data prior to the video component data being rendered by the wireless source device, and the wireless sink device can generate a frame of video data based on the video component data and the metadata.

Claims

1. A method of transmitting video data from a wireless source device to a wireless sink device, the method comprising:

exchanging capability information with the wireless sink device;

based on the exchange of capability information with the wireless sink device, selecting an operating mode for the wireless source device, wherein the operating mode comprises one of a video component mode or a pixel domain mode;

when the selected operating mode for the wireless source device comprises the video component mode, intercepting a first video component prior to the first video component being rendered at the wireless source device, wherein the first video component comprises a call to a driver of a graphics processing unit, and wherein the driver supports a graphics application program interface (API), and wherein the first video component further comprises one or more commands supported by the graphics API;

generating first metadata describing the first video component, wherein the first metadata comprises an identifier of a screen location to which the first video component is to be rendered;

intercepting a second video component prior to rendering at the wireless source device, wherein the second video component comprises pixel data;

generating second metadata describing the second video component, wherein the second metadata comprises an identifier of a screen location to which the second video component is to be rendered;

transmitting the first video component, the second video component, the first metadata, and the second metadata to the wireless sink device; and

rendering at the wireless source device a frame of video based on the first video component and the second video component.

2. The method of claim 1,

wherein exchanging capability information with the wireless sink device comprises receiving from the wireless sink device an indication that the wireless sink device supports the graphics API.

3. The method of claim 1, further comprising intercepting a third video component prior to rendering at the wireless source device, wherein the third video component comprises compressed video data.

4. The method of claim 1, further comprising intercepting a third video component prior to rendering at the wireless source device, wherein the third video component comprises audio data.

5. The method of claim 1, wherein the first metadata comprises an identifier of a frame for which the first video component is associated.

6. The method of claim 1, wherein the first metadata comprises a resolution of the first video component.

7. The method of claim 3, wherein intercepting the third video component comprises detecting the initialization of a media parser.

8. A wireless source device comprising:

a memory;

one or more processors communicatively coupled to the memory, the one or more processors configured to;

exchange capability information with the wireless sink device;

based on the exchange of capability information with the wireless sink device, select an operating mode for the wireless source device, wherein the operating mode comprises one of a video component mode or a pixel domain mode;

when the selected operating mode for the wireless source device comprises the video component mode, intercept a first video component prior to the first video component being rendered at the wireless source device, wherein the first video component comprises a call to a driver of a graphics processing unit, and wherein the driver supports a graphics application program interface (API), and wherein the first video component further comprises one or more commands supported by the API;

generate first metadata describing the first video component, wherein the first metadata comprises an identifier of a screen location to which the first video component is to be rendered;

intercept a second video component prior to rendering at the wireless source device, wherein the second video component comprises pixel data;

generate second metadata describing the second video component, wherein the second metadata comprises an identifier of a screen location to which the second video component is to be rendered;

transmit the first video component and the first metadata to a wireless sink device;

transmit the second video component to the wireless sink device; and

render at the wireless source device a frame of video based on the first video component and the second video component.

9. The wireless source device of claim 8, wherein

to exchange the capability information with the wireless sink device, the one or more processors are configured to receive from the wireless sink device an indication that the wireless sink device supports the graphics API.

10. The wireless source device of claim 8, wherein the metadata encoder is further configured to intercept a third video component prior to rendering at the wireless source device, wherein the third video component comprises compressed video data.

11. The wireless source device of claim 8, wherein the metadata encoder is further configured to intercept a third video component prior to rendering at the wireless source device, wherein the third video component comprises audio data.

12. The wireless source device of claim 8, wherein the first metadata comprises an identifier of a screen location to which the first video component is to be rendered.

13. The wireless source device of claim 8, wherein the first metadata comprises a resolution of the first video component.

14. The wireless source device of claim 8, wherein intercepting the first video component comprises identifying a call to a graphics application program interface.

15. The wireless source device of claim 8, wherein intercepting the first video component comprises detecting the initialization of a media parser.

16. A non-transitory, computer-readable storage medium storing instructions that upon execution by one or more processors cause the one or more processors to:

exchange capability information with the wireless sink device;

based on the exchange of capability information with the wireless sink device, select an operating mode for the wireless source device, wherein the operating mode comprises one of a video component mode or a pixel domain mode;

when the selected operating mode for the wireless source device comprises the video component mode, intercept a first video component prior to the first video component being rendered at the wireless source device, wherein the first video component comprises a call to a driver of a graphics processing unit, and wherein the driver supports a graphics application program interface (API), and wherein the first video component further comprises one or more commands supported by the API;

generate first metadata describing the first video component, wherein the first metadata comprises an identifier of a screen location to which the first video component is to be rendered;

intercept a second video component prior to rendering at the wireless source device, wherein the second video component comprises pixel data;

generate second metadata describing the second video component, wherein the second metadata comprises an identifier of a screen location to which the second video component is to be rendered;

transmit the first video component, the second video component, the first metadata, and the second metadata to the wireless sink device; and

render at the wireless source device a frame of video based on the first video component and the second video component.

17. A wireless source device configured to transmit video data to a wireless sink device, the wireless source device comprising:

means for exchanging capability information with the wireless sink device;

means for selecting an operating mode for the wireless source device based on the exchange of capability information with the wireless sink device, wherein the operating mode comprises one of a video component mode or a pixel domain mode;

means for intercepting a first video component prior to the first video component being rendered at the wireless source device when the selected operating mode for the wireless source device comprises the video component mode, wherein the first video component comprises a call to a driver of a graphics processing unit, and wherein the driver supports a graphics application program interface (API), and wherein the first video component further comprises one or more commands supported by the API;

means for generating first metadata describing the first video component, wherein the first metadata comprises an identifier of a screen location to which the first video component is to be rendered;

means for intercepting a second video component prior to rendering at the wireless source device, wherein the second video component comprises pixel data;

means for generating second metadata describing the second video component, wherein the second metadata comprises an identifier of a screen location to which the second video component is to be rendered;

means for transmitting the first video component, the second video component, the first metadata, and the second metadata to the wireless sink device; and

means for rendering at the wireless source device a frame of video based on the first video component and the second video component.