SYSTEM AND METHOD OF TRANSMITTING CONTENT FROM A MOBILE DEVICE TO A WIRELESS DISPLAY

• US 20110010607A1
• Filed: 07/09/2009
• Published: 01/13/2011
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: RAVEENDRAN, Vijayalakshmi R.
• Granted Patent: US 8,406,245 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 47/20 Traffic policing
• CPC Class Codes: H04L 47/38 by adapting coding or compression rate
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 49/901 using storage descriptor, e.g. read or write pointers
• CPC Class Codes: H04L 49/9047 including multiple buffers, e.g. buffer pools
• CPC Class Codes: H04L 65/765 intermediate
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04W 28/0263 involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/00 Services specially adapted for wireless communication networks; Facilities therefor
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

A method of transmitting content to a wireless display device is disclosed. The method may include receiving multimedia data, encoding the multimedia data, and writing encoded multimedia data into a first predetermined memory location of a shared memory. Further, the method may include encapsulating the encoded multimedia data and writing encapsulation data into a second predetermined memory location of the shared memory. The method may also include calculating error control encoding and writing the error control encoding into a third predetermined memory location of the shared memory. Further, the method may include transmitting the encoded multimedia data, the encapsulation data, and the error control encoding to the wireless display device.

Claims

1. A method of transmitting content to a wireless display device, the method comprising:

receiving multimedia data;

encoding the multimedia data;

writing encoded multimedia data into a first predetermined memory location of a shared memory;

encapsulating the encoded multimedia data;

writing encapsulation data into a second predetermined memory location of the shared memory;

calculating error control encoding;

writing the error control encoding into a third predetermined memory location of the shared memory; and

transmitting the encoded multimedia data, the encapsulation data, and the error control encoding to the wireless display device.

2. The method of claim 1, further comprising:

determining at least one of a channel bandwidth a packet error rate and a desired latency.

3. The method of claim 2, further comprising:

calculating at least one of a video packet size, transport header characteristics and a corresponding length, and

an outer coding rate and a corresponding medium access control (MAC) header length.

4. The method of claim 3, wherein the video packet size, the transport header characteristics and the corresponding length, and the outer coding rate and the corresponding MAC header length is determined based on at least one of the channel bandwidth, the packet error rate and the desired latency.

5. The method of claim 4, further comprising:

allocating a first memory address length for a MAC header;

allocating a second memory address length for a transport header; and

allocating a third memory address length for a video packet.

6. The method of claim 5, further comprising:

writing coded video data into the predetermined memory locations of the shared memory.

7. The method of claim 6, further comprising:

obtaining metadata from a video encoder.

8. The method of claim 7, further comprising:

preparing headers for one or more coded video data segments.

9. The method of claim 8, further comprising:

creating parity data for the one or more coded video data segments.

10. The method of claim 9, further comprising:

inserting the parity data at the end of the one or more coded video data segments.

11. A wireless device, comprising:

means for receiving multimedia data;

means for encoding the multimedia data;

means for writing encoded multimedia data into a first predetermined memory location of a shared memory;

means for encapsulating the encoded multimedia data;

means for writing encapsulation data into a second predetermined memory location of the shared memory;

means for calculating error control encoding;

means for writing the error control encoding into a third predetermined memory location of the shared memory; and

means for transmitting the encoded multimedia data, the encapsulation data, and the error control encoding to the wireless display device.

12. The wireless device of claim 11, further comprising:

means for determining at least one of a channel bandwidth,a packet error rate and a desired latency.

13. The wireless device of claim 12, further comprising:

means for calculating at least one of a video packet size, transport header characteristics and a corresponding length, and

an outer coding rate and a corresponding medium access control (MAC) header length.

14. The wireless device of claim 13, wherein the video packet size, the transport header characteristics and the corresponding length, and the outer coding rate and the corresponding MAC header length is determined based on at least one of the channel bandwidth, the packet error rate and the desired latency.

15. The wireless device of claim 14, further comprising:

means for allocating a first memory address length for a MAC header;

means for allocating a second memory address length for a transport header; and

means for allocating a third memory address length for a video packet.

16. The wireless device of claim 15, further comprising:

means for writing coded video data into the predetermined memory locations of the shared memory.

17. The wireless device of claim 16, further comprising:

means for obtaining metadata from a video encoder.

18. The wireless device of claim 17, further comprising:

means for preparing headers for one or more coded video data segments.

19. The wireless device of claim 18, further comprising:

means for creating parity data for the one or more coded video data segments.

20. The wireless device of claim 19, further comprising:

means for inserting the parity data at the end of the one or more coded video data segments.

21. A wireless device, comprising:

a processor, wherein the processor is operable to;

receive multimedia data;

encode the multimedia data;

write encoded multimedia data into a first predetermined memory location of a shared memory;

encapsulate the encoded multimedia data;

write encapsulation data into a second predetermined memory location of the shared memory;

calculate error control encoding;

write the error control encoding into a third predetermined memory location of the shared memory; and

transmit the encoded multimedia data, the encapsulation data, and the error control encoding to the wireless display device.

22. The wireless device of claim 21, wherein the processor is further operable to:

determine at least one of a channel bandwidth,a packet error rate, and a desired latency.

23. The wireless device of claim 22, wherein the processor is further operable to:

calculate at least one of a video packet size, transport header characteristics and a corresponding length, and

an outer coding rate and a corresponding medium access control (MAC) header length.

24. The wireless device of claim 23, wherein the video packet size, the transport header characteristics and the corresponding length, and the outer coding rate and the corresponding MAC header length is determined based on at least one of the channel bandwidth, the packet error rate, and the desired latency.

25. The wireless device of claim 24, wherein the processor is further operable to:

allocate a first memory address length for a MAC header;

allocate a second memory address length for a transport header; and

allocate a third memory address length for a video packet.

26. The wireless device of claim 25, wherein the processor is further operable to:

write coded video data into the predetermined memory locations of the shared memory.

27. The wireless device of claim 26, wherein the processor is further operable to:

obtain metadata from a video encoder.

28. The wireless device of claim 27, wherein the processor is further operable to:

prepare headers for one or more coded video data segments.

29. The wireless device of claim 28, wherein the processor is further operable to:

create parity data for the one or more coded video data segments.

30. The wireless device of claim 29, wherein the processor is further operable to:

insert the parity data at the end of the one or more coded video data segments.

31. A computer program product, the computer program product comprising:

a computer-readable medium, the computer-readable medium comprising;

at least one instruction for receiving multimedia data;

at least one instruction for encoding the multimedia data;

at least one instruction for writing encoded multimedia data into a first predetermined memory location of a shared memory;

at least one instruction for encapsulating the encoded multimedia data;

at least one instruction for writing encapsulation data into a second predetermined memory location of the shared memory;

at least one instruction for calculating error control encoding;

at least one instruction for writing the error control encoding into a third predetermined memory location of the shared memory; and

at least one instruction for transmitting the encoded multimedia data, the encapsulation data, and the error control encoding to the wireless display device.

32. The computer program product of claim 31, wherein the computer-readable medium further comprises:

at least one instruction for determining at least one of a channel bandwidth, a packet error rate, and a desired latency.

33. The computer program product of claim 32, wherein the computer-readable medium further comprises:

at least one instruction for calculating at least one of a video packet size, transport header characteristics and a

corresponding length, and an outer coding rate and a corresponding medium access control (MAC) header length.

34. The computer program product of claim 33, wherein the video packet size, the transport header characteristics and the corresponding length, and the outer coding rate and the corresponding MAC header length is determined based on at least one of the channel bandwidth, the packet error rate, and the desired latency.

35. The computer program product of claim 34, wherein the computer-readable medium further comprises:

at least one instruction for allocating a first memory address length for a MAC header;

at least one instruction for allocating a second memory address length for a transport header; and

at least one instruction for allocating a third memory address length for a video packet.

36. The computer program product of claim 35, wherein the computer-readable medium further comprises:

at least one instruction for writing coded video data into the predetermined memory locations of the shared memory.

37. The computer program product of claim 36, wherein the computer-readable medium further comprises:

at least one instruction for obtaining metadata from a video encoder.

38. The computer program product of claim 37, wherein the computer-readable medium further comprises:

at least one instruction for preparing headers for one or more coded video data segments.

39. The computer program product of claim 38, wherein the computer-readable medium further comprises:

at least one instruction for creating parity data for the one or more coded video data segments.

40. The computer program product of claim 39, wherein the computer-readable medium further comprises:

at least one instruction for inserting the parity data at the end of the one or more coded video data segments.

41. A method of wirelessly transmitting data from a mobile device to a display device, comprising;

receiving in the mobile device first data to he included in a first packet;

receiving in the mobile device second data to he included in a second packet;

allocating locations of a memory buffer associated with the mobile device in which to store an encoded version of the first data, an encoded version of the second data, a first transport header data associated with the encoded version of the first data, a second transport header data associated with the encoded version of the second data, a first Media Access Control (MAC) header data associated with the first data, and a second MAC header data associated with the second data, wherein the locations arc allocated such that the first encoded data, first transport header data and first MAC header data are stored in contiguous memory locations and the second encoded data, second transport header data and second MAC header data are stored in contiguous memory locations; and

storing the first encoded data, first transport header data and first MAC header data in contiguous memory buffer locations and the second encoded data, second transport header data and second MAC header data in contiguous memory locations.

42. The method of claim 41 wherein storing includes storing the first encoded data and second encoded data concurrently.

43. The method of claim 41 wherein the allocated locations are based on a predetermined channel bandwidth and packet error rate (PER).

44. The method of claim 41 further comprising transmitting one or more of the first and second packets from the mobile device to the display device.

45. The method of claim 44 further comprising establishing a near field communication (NFC) link between the mobile device and the display device;

wherein transmitting one or more of the first and second packets from the mobile device to the display device includes transmitting one or more of the first and second packets from the mobile device to the display device via the NFC link.

46. The method of claim 41 further comprising storing the first encoded data, first transport header data and first MAC header data in contiguous memory buffer locations associated with the display device and the second encoded data, second transport header data and second MAC header data in contiguous memory locations associated with the display device.

47. A method of wirelessly transmitting data between a mobile device and a display device, comprising:

receiving data in the mobile device;

including the received data in transmission control protocol (TCP) segments; and

forwarding the TCP segments to the display device prior to application layer processing of the received data by the mobile device.

48. The method of claim 47 wherein the received data is not stored on the mobile device.

49. A system for wirelessly transmitting data from a mobile device to a display device, comprising:

means for receiving in the mobile device first data to be included in a first packet;

means for receiving in the mobile device second data to be included in a second packet;

means for allocating locations of a memory buffer associated with the mobile device in which to store an encoded version of the first data, an encoded version of the second data, a first transport header data associated with the encoded version of the first data, a second transport header data associated with the encoded version of the second data, a first Media Access Control (MAC) header data associated with the first data, and a second MAC header data associated with the second data, wherein the locations are allocated such that the first encoded data, first transport header data and first MAC header data are stored in contiguous memory locations and the second encoded data, second transport header data and second MAC header data are stored in contiguous memory locations; and

means for storing the first encoded data, first transport header data and first MAC header data in contiguous memory buffer locations and the second encoded data, second transport header data and second MAC header data in contiguous memory locations.

50. The system of claim 49 wherein the allocated locations are based on a predetermined channel bandwidth and packet error rate (PER).

51. The system of claim 49 further comprising means for establishing a near field communication (NFC) link between the mobile device and the display device;

and

means for transmitting one or more of the first and second packets from the mobile device to the display device via the NFC link.

52. The system of claim 49 further comprising means for storing the first encoded data, first transport header data and first MAC header data in contiguous memory buffer locations associated with the display device and the second encoded data, second transport header data and second MAC header data in contiguous memory locations associated with the display device.

53. A system for wirelessly transmitting data between a mobile device and a display device, comprising:

means for receiving data in the mobile device;

means for including the received data in transmission control protocol (TCP) segments; and

means for forwarding the TCP segments to the display device prior to application layer processing of the received data by the mobile device.

54. The system of claim 53 wherein the received data is not stored on the mobile device.

55. A computer program product, comprising:

computer readable medium comprising;

code for wirelessly transmitting data from a mobile device to a display device, the code comprising;

code for causing first data to be included in a first packet to be received in the mobile device;

code for causing second data to be included in a second packet to be received in the mobile device;

code for causing locations of a memory buffer to be allocated in which to store an encoded version of the first data, an encoded version of the second data, a first transport header data associated with the encoded version of the first data, a second transport header data associated with the encoded version of the second data, a first Media Access Control (MAC) header data associated with the first data, and a second MAC header data associated with the second data, wherein the locations are allocated such that the first encoded data, first transport header data and first MAC header data are stored in contiguous memory locations and the second encoded data, second transport header data and second MAC header data are stored in contiguous memory locations; and

code for causing the first encoded data, first transport header data and first MAC header data to be stored in contiguous memory buffer locations and the second encoded data, second transport header data and second MAC header data to be stored in contiguous memory locations.

56. The computer program product of claim 55 further comprising code for causing the locations to be allocated based on a predetermined channel bandwidth and packet error rate (PER).

57. The computer program product of claim 55 further comprising:

code for causing a near field communication (NFC) link to be established between the mobile device and the display device; and

code for causing one or more of the first and second packets to be transmitted from the mobile device to the display device via the NFC link.

58. A computer program product, comprising:

computer readable medium comprising;

code for wirelessly transmitting data between a mobile device and a display device, the code comprising;

code for causing data to be received in the mobile device;

code for causing received data to be included in transmission control protocol (TCP) segments; and

code for causing the TCP segments to be forwarded to the display device prior to application layer processing of the received data by the mobile device.

59. The computer program product of claim 58 wherein the received data is not stored on the mobile device.

60. A method of wirelessly receiving data from a mobile device in a display device, comprising;

receiving in the display device a first packet;

receiving in the display device a second packet;

allocating locations of a memory buffer associated with the display device in which to store encoded data from the first packet, encoded data from the second packet, transport header data from the first packet, transport header data from the second packet, Media Access Control (MAC) header data from the first packet, and MAC header data from the second packet, wherein the locations are allocated such that the encoded data, transport header data and MAC header data from the first packet are stored in contiguous memory locations and the encoded data, transport header data and MAC header data from the second packet are stored in contiguous memory locations; and

storing the encoded data, transport header data and MAC header data from first packet in contiguous memory buffer locations, and the encoded data, transport header data and MAC header data from the second packet in contiguous memory locations.

61. The method of claim 60 wherein the allocated locations are based on a predetermined channel bandwidth and packet error rate (PER).

62. The method of claim 60 further comprising establishing a near field communication (NFC) link between the mobile device and the display device;

wherein receiving the first and second packets includes receiving the first and second packets via the NFC link.

63. A system for wirelessly receiving data from a mobile device in a display device, comprising;

means for receiving in the display device a first packet;

means for receiving in the display device a second packet;

means for allocating locations of a memory buffer associated with the display device in which to store encoded data from the first packet, encoded data from the second packet, transport header data from the first packet, transport header data from the second packet, Media Access Control (MAC) header data from the first packet, and MAC header data from the second packet, wherein the locations are allocated such that the encoded data, transport header data and MAC header data from the first packet are stored in contiguous memory locations and the encoded data, transport header data and MAC header data from the second packet arc stored in contiguous memory locations; and

means for storing the encoded data, transport header data and MAC header data from first packet in contiguous memory buffer locations, and the encoded data, transport header data and MAC header data from the second packet in contiguous memory locations.

64. The system of claim 63 wherein the allocated locations are based on a predetermined channel bandwidth and packet error rate (PER).

65. The system of claim 63 further comprising:

means for establishing a near field communication (NFC) link between the mobile device and the display device; and

means for receiving the first and second packets in the display device via the NFC link.

66. A computer program product, comprising:

computer readable medium comprising;

code for wirelessly receiving data from a mobile device in a display device, comprising;

code for causing a first packet to be received in the display device;

code for causing a second packet to be received in the display device;

code for causing allocation of locations of a memory buffer associated with the display device in which to store encoded data from the first packet, encoded data from the second packet, transport header data from the first packet, transport header data from the second packet, Media Access Control (MAC) header data from the first packet, and MAC header data from the second packet, wherein the locations are allocated such that the encoded data, transport header data and MAC header data from the first packet are stored in contiguous memory locations and the encoded data, transport header data and MAC header data from the second packet are stored in contiguous memory locations; and

code for causing the encoded data, transport header data and MAC header data from first packet to be stored in contiguous memory buffer locations, and the encoded data, transport header data and MAC header data from the second packet to be stored in contiguous memory locations.

67. The computer program product of claim 66 further comprising code for causing the locations to be allocated based on a predetermined channel bandwidth and packet error rate (PER).

68. The computer program product of claim 66 further comprising:

code for causing a near field communication (NFC) link to be established between the mobile device and the display device; and

code for causing the first and second packets to be received in the display device via the NFC link.