APPARATUS AND METHODS FOR PROCESSING FRAMES OF VIDEO DATA ACROSS A DISPLAY INTERFACE USING A BLOCK-BASED ENCODING SCHEME AND A TAG ID

• US 20110310980A1
• Filed: 06/22/2010
• Published: 12/22/2011
• Est. Priority Date: 06/22/2010
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Mathew, Mithran Cheriyan
• Application Number:
  US12/820,838
• Publication Number:
  US 20110310980A1
• Time in Patent Office: Days
• US Class Current: 375/240.26
• CPC Class Codes: G06F 3/1415 with means for detecting differences between the image stored in the host and the images displayed on the displays
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 2352/00 Parallel handling of streams of display data
• CPC Class Codes: G09G 2360/08 Power processing, i.e. workload management for processors involved in display operations, such as CPUs or GPUs
• CPC Class Codes: G09G 2360/122 Tiling
• CPC Class Codes: G09G 2360/128 Frame memory using a Synchronous Dynamic RAM [SDRAM]
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/393 Arrangements for updating the contents of the bit-mapped memory
• CPC Class Codes: H04N 19/507 using conditional replenishment
• CPC Class Codes: H04N 19/593 involving spatial prediction techniques

Abstract

Disclosed are methods, apparatus, and systems, including computer program products, implementing and using techniques for processing frames of video data sent across a display interface using a block-based encoding scheme and a tag ID. The disclosed techniques provide for optimization of the display interface situated between the graphics processor and the display controller of an electronic device. The disclosed techniques minimize the amount of signaling over the interface and reduce the power consumed at the interface. Accordingly, the battery life of some electronic devices can be extended. In one embodiment, the graphics processor is configured to receive frames of video data, where each frame includes one or more blocks of the video data. The graphics processor is configured to encode each block of video data, generate a tag ID associated with each encoded block of video data, and output each encoded block of video data and associated tag ID. The display controller is configured to receive the encoded blocks of video data and associated tag ID'"'"'s from the graphics processor via the display interface. The display controller is configured to interpret the tag ID associated with a respective encoded block of video data and determine whether to decode at least part of the respective encoded block of video data according to the tag ID. A display, such as a memory-based display, is in communication with the display controller. The display is configured to receive and display decoded blocks of video data from the display controller.

Claims

1. An apparatus comprising:

a graphics processor configured to receive frames of video data, each frame including a plurality of blocks of the video data, the graphics processor configured to;

i) encode each block of video data, and ii) generate a tag ID associated with each encoded block of video data, the graphics processor configured to output each encoded block of video data and associated tag ID;

a display interface in communication with the graphics processor;

a display controller in communication with the display interface, the display controller configured to receive the encoded blocks of video data and associated tag ID'"'"'s from the graphics processor via the display interface, the display controller configured to;

i) interpret the tag ID associated with a respective encoded block of video data, and ii) determine whether to decode at least part of the respective encoded block of video data according to the tag ID; and

a display in communication with the display controller, the display configured to receive decoded blocks of video data from the display controller, the display configured to display the decoded blocks of video data.

2. The apparatus of claim 1, the tag ID including one or more indications selected from the group consisting of:

a start of a new frame of video data, a redundant frame of video data, a start of a new block of video data, and a redundant block of video data.

3. The apparatus of claim 1, the display controller configured to decode the encoded block of video data if the tag ID indicates a start of a new block of video data.

4. The apparatus of claim 1, the display controller configured to disregard the encoded block of video data if the tag ID indicates a start of a redundant block of video data.

5. The apparatus of claim 4, the display controller configured to output a previous decoded block of video data.

6. The apparatus of claim 1 further comprising:

a memory in communication with the display controller, the memory capable of storing the decoded blocks of video data.

7. The apparatus of claim 1, the graphics processor configured to encode the blocks of video data using a Run Length Encoding (RLE) process.

8. The apparatus of claim 1, the graphics processor configured to encode the blocks of video data using an Arithmetic Coding (AC) process.

9. The apparatus of claim 1, the graphics processor configured to encode the blocks of video data using a Huffman Coding (HC) process.

10. The apparatus of claim 1, the display being a memory display.

11. The apparatus of claim 10, the memory display being a bi-stable display.

12. The apparatus of claim 11, the bi-stable display being one selected from the group consisting of:

an interferometric modulation display (IMOD), a cholesteric liquid crystal display (ChLCD), and an electrophoretic display.

13. The apparatus of claim 1, the frames of video data being stored in one or more frame buffers, the graphics processor configured to receive the frames of video data from the one or more frame buffers.

14. The apparatus of claim 1, the display interface configured to pass the encoded blocks of video data using a standard selected from the group consisting of:

the Mobile Industry Processor Interface (MIPI) standard, the Mobile Display Digital Interface (MDDI) standard, the Low-Voltage Differential Signaling (LVDS) standard, and the High-Definition Multimedia Interface (HDMI) standard.

15. The apparatus of claim 1 further comprising:

an encoder configured to encode each block of video data.

16. The apparatus of claim 1 further comprising:

a decoder configured to decode the at least part of the respective encoded block of video data according to the tag ID.

17. The apparatus of claim 1 further comprising:

a tag ID generator configured to generate the tag ID associated with each encoded block of video data.

18. The apparatus of claim 1 further comprising:

a tag ID reader configured to interpret the tag ID associated with the respective encoded block of video data.

19. The apparatus of claim 1, the graphics processor configured to output a packet including a respective encoded block of video data and associated tag ID.

20. The apparatus of claim 19, the associated tag ID located at a beginning of the packet.

21. The apparatus of claim 19, the packet further including an indication of a number of bytes of data.

22. The apparatus of claim 1 further comprising:

a driver circuit configured to send at least one signal comprising the decoded blocks of video data to the display.

23. The apparatus of claim 22, the display controller configured to send the decoded blocks of video data to the driver circuit.

24. The apparatus of claim 1 further comprising:

an image source module configured to send the frames of video data to the graphics processor.

25. The apparatus of claim 24, the image source module comprising at least one of a receiver, a transceiver, and a transmitter.

26. The apparatus of claim 1 further comprising:

an input device configured to receive input data and to communicate the input data to a controller.

27. The apparatus of claim 1, the graphics processor situated in a server device.

28. The apparatus of claim 1, the display controller situated in a client device.

29. The apparatus of claim 28, the display situated in the client device.

30. A method comprising:

receiving frames of video data at a graphics processor, each frame including a plurality of blocks of the video data;

encoding each block of video data;

generating a tag ID associated with each encoded block of video data;

providing each encoded block of video data and associated tag ID from the graphics processor to a display interface in communication with the graphics processor;

receiving the encoded blocks of video data and associated tag ID'"'"'s at a display controller in communication with the display interface;

interpreting the tag ID associated with a respective encoded block of video data;

determining whether to decode at least part of the respective encoded block of video data according to the tag ID; and

providing decoded blocks of video data from the display controller to a display in communication with the display controller, the display configured to display the decoded blocks of video data.

31. The method of claim 30 further comprising:

decoding the encoded block of video data if the tag ID indicates a start of a new block of video data.

32. The method of claim 30 further comprising:

disregarding the encoded block of video data if the tag ID indicates a start of a redundant block of video data.

33. The method of claim 30 further comprising:

outputting a previous decoded block of video data if the tag ID indicates a start of a redundant block of video data.

34. The method of claim 30, encoding each block of video data comprising:

encoding the block of video data using a Run Length Encoding (RLE) process.

35. The method of claim 30, providing each encoded block of video data and associated tag ID from the graphics processor to the display interface comprising:

outputting a packet including a respective encoded block of video data and associated tag ID.

36. The method of claim 30, generating the tag ID associated with each encoded block of video data comprising:

performing a compare operation between successive blocks of video data.

37. The method of claim 30, the graphics processor situated in a server device.

38. The method of claim 30, the display controller situated in a client device.

39. An apparatus comprising:

graphics processor means for receiving frames of video data, each frame including a plurality of blocks of the video data, and i) encoding each block of video data, and ii) generating a tag ID associated with each encoded block of video data, and outputting each encoded block of video data and associated tag ID;

display interface means in communication with the graphics processor means;

display controller means in communication with the display interface means, the display controller means for receiving the encoded blocks of video data and associated tag ID'"'"'s from the graphics processor means via the display interface means, and;

i) interpreting the tag ID associated with a respective encoded block of video data, and ii) determining whether to decode at least part of the respective encoded block of video data according to the tag ID; and

display means in communication with the display controller means, the display means for receiving decoded blocks of video data from the display controller means and displaying the decoded blocks of video data.

40. The apparatus of claim 39, the graphics processor situated in a server device.

41. The apparatus of claim 39, the display controller situated in a client device.

42. The apparatus of claim 41, the display situated in the client device.

43. A method comprising:

receiving frames of video data at a graphics processor, each frame including a plurality of blocks of the video data;

encoding each block of video data;

generating a tag ID associated with each encoded block of video data; and

providing each encoded block of video data and associated tag ID from the graphics processor to a display interface in communication with the graphics processor.

44. The method of claim 43, the graphics processor situated in a server device.

45. The method of claim 43, the tag ID including one or more indications selected from the group consisting of:

a start of a new frame of video data, a redundant frame of video data, a start of a new block of video data, and a redundant block of video data.

46. The method of claim 43, providing each encoded block of video data and associated tag ID from the graphics processor to the display interface comprising:

outputting a packet including a respective encoded block of video data and associated tag ID.

47. The method of claim 43, generating the tag ID associated with each encoded block of video data comprising:

performing a compare operation between successive blocks of video data.

48. A method comprising:

receiving encoded blocks of video data and tag ID'"'"'s at a display controller from a display interface, each of the encoded blocks having a respective associated tag ID;

interpreting the tag ID associated with a respective encoded block of video data;

determining whether to decode at least part of the respective encoded block of video data according to the tag ID; and

providing decoded blocks of video data from the display controller to a display in communication with the display controller, the display configured to display the decoded blocks of video data.

49. The method of claim 48, the display controller situated in a client device.

50. The method of claim 48 further comprising:

decoding the encoded block of video data if the tag ID indicates a start of a new block of video data.

51. The method of claim 48 further comprising:

disregarding the encoded block of video data if the tag ID indicates a start of a redundant block of video data.

52. The method of claim 48 further comprising:

outputting a previous decoded block of video data if the tag ID indicates a start of a redundant block of video data.