System and method of transmitting content from a mobile device to a wireless display

• US 8,406,245 B2
• Filed: 07/09/2009
• Issued: 03/26/2013
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Raveendran, Vijayalakshmi R.
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US12/500,475
• Publication Number:
  US 20110010607A1
• Time in Patent Office: 1,356 Days
• Field of Search: 370/412, 370/470, 370/471, 714/776
• US Class Current: 370/412
• 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;

wherein the first predetermined memory location, the second predetermined memory location, and the third predetermined memory location are allocated based on a channel bandwidth and a packet error rate.

2. The method of claim 1, further comprising:

determining at least one of the channel bandwidth, the 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 device;

wherein the first predetermined memory location, the second predetermined memory location, and the third predetermined memory location are allocated based on a channel bandwidth and a packet error rate.

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

means for determining at least one of the channel bandwidth, the 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 device;

wherein the first predetermined memory location, the second predetermined memory location, and the third predetermined memory location are allocated based on a channel bandwidth and a packet error rate.

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

determine at least one of the channel bandwidth, the 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 non-transitory 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 a wireless device;

wherein the first predetermined memory location, the second predetermined memory location, and the third predetermined memory location are allocated based on a channel bandwidth and a packet error rate.

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 the channel bandwidth, the 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.