Wireless video transmission system

• US 20050188407A1
• Filed: 04/21/2004
• Published: 08/25/2005
• Est. Priority Date: 02/23/2004
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Deshpande, Sachin Govind, van Beek, Petrus J. L.
• Granted Patent: US 8,018,850 B2
• Time in Patent Office: Days
• US Class Current: 725/81
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• CPC Class Codes: H04N 21/25891 being end-user preferences retrieval of video data in a video database based on user preferences G06F16/739; arrangements for recognizing users' preferences H04H60/46; user profiles in network data switching protocols H04L67/306; processing of user preferences or user profiles in wireless networks H04W8/18
• 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 21/4347 Demultiplexing of several video streams
• 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 21/6377 directed to server one-way streaming services wherein the source is controlled by the destination H04L65/613
• CPC Class Codes: H04N 21/64738 Monitoring network characteristics, e.g. bandwidth, congestion level data switched network analysis H04L41/14; monitoring functioning in data switched networks H04L43/0817; flow control in packet networks H04L47/10
• CPC Class Codes: H04N 21/64776 for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server ARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04N 21/658 Transmission by the client directed to the server
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• 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 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

A transmission systems suitable for video.

Claims

1. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection;

(d) estimating the bandwidth of said wireless interconnection;

(e) inferring a condition of said wireless interconnection based upon said bandwidth;

(f) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

2. The method of claim 1 wherein said second plurality of packets are provided to said transmitter at the maximum rate.

3. The method of claim 1 wherein said second plurality of packets are provided as a burst of packets with at least two packets transmitted without additional data being transmitted between them in a back-to-back fashion.

4. The method of claim 1 wherein said wireless interconnection is 802.11 compliant.

5. The method of claim 1 wherein said second plurality of packets is free from including packets not comprising audio and video data.

6. The method of claim 1 wherein said second plurality of packets is transmitted in a duration less than 1 second.

7. The method of claim 1 wherein said transmitting is by an APPLICATION LAYER.

8. The method of claim 1 wherein said inferring is based upon a table of data.

9. The method of claim 1 wherein said second plurality of packets is a burst and said first plurality of packets is not a burst.

10. A method for transmitting data comprising:

(a) estimating the bandwidth of a wireless interconnection between a transmitter and a receiver;

(b) inferring a condition of said wireless interconnection based upon said bandwidth;

(c) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

11. The method of claim 10 further comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a said receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection.

12. The method of claim 10 wherein said amount of data is reduced if said bandwidth decreases.

13. The method of claim 10 wherein said amount of data is increased if said bandwidth increases

14. The method of claim 10 wherein said bandwidth is based upon a packet error ratio.

15. The method of claim 10 wherein said bandwidth is based upon a bit error ratio.

16. The method of claim 10 wherein said bandwidth is based upon a signal to noise ratio.

17. The method of claim 10 wherein said inferring is based upon a table of data.

18. A method for transmitting data comprising:

(a) estimating the capacity to transmit packets across a wireless interconnection between a transmitter and a receiver;

(b) inferring a condition of said wireless interconnection based upon said capacity;

(c) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

19. The method of claim 18 wherein said amount of data is reduced if said capacity decreases.

20. The method of claim 18 wherein said amount of data is increased if said capacity increases.

21. The method of claim 18 wherein said inferring is based upon a table of data.

22. A method for transmitting data comprising:

(a) transmitting packets of data from a transmitter to a receiver over a wireless interconnection wherein said transmitting data is modified by at least one of;

(i) modifying the amount of data contained in said packets to be transmitted across said wireless interconnection based upon estimating the bandwidth of said interconnection;

(ii) defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein the time interval between said second plurality of packets and said third plurality of packets is modified based upon estimating the bandwidth of said interconnection;

(iii) defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, wherein the number of packets in said second plurality of said packets is modified based upon estimating the bandwidth of said interconnection;

(iv) modifying the rate of transmission of said packets across said wireless interconnection based upon estimating the bandwidth of said wireless interconnection.

23. The method of claim 22 wherein said modification is based upon modifying the amount of data contained in said packets to be transmitted across said wireless interconnection based upon estimating the bandwidth of said interconnection.

24. The method of claim 22 wherein said modification is based upon defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein the time interval between said second plurality of packets and said third plurality of packets is modified based upon estimating the bandwidth of said interconnection.

25. The method of claim 22 wherein said modification is based upon defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, wherein the number of packets in said second plurality of said packets is modified based upon estimating the bandwidth of said interconnection.

26. The method of claim 22 wherein said modification is based upon at least two of

(i) modifying the amount of data contained in said packets to be transmitted across said wireless interconnection based upon estimating the bandwidth of said interconnection;

(ii) defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein the time interval between said second plurality of packets and said third plurality of packets is modified based upon estimating the bandwidth of said interconnection;

(iii) defining a first average rate to transmit a first plurality of said packets of said data to said receiver, defining a second average rate to transmit a second plurality of said packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate, wherein the number of packets in said second plurality of said packets is modified based upon estimating the bandwidth of said interconnection.

27. The method of claim 22 wherein said transmitting data is said modified based upon a table of data.

28. The method of claim 22 wherein said modification includes modifying the rate of transmission of said packets across said wireless interconnection based upon said estimating the bandwidth of said wireless interconnection.

29. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) modifying the number of said second plurality of packets based upon a criteria, wherein said number of said second plurality of packets is free from at least one of (i) being substantially raised and (ii) being substantially lowered;

(d) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection.

30. The method of claim 29 wherein said criteria is an estimation of the bandwidth of said wireless interconnection.

31. The method of claim 29 wherein said criteria is based upon a table of data.

32. A method for transmitting data comprising:

(a) estimating the capacity to transmit packets across a wireless interconnection between a transmitter and a receiver;

(b) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said estimate and previous estimations of said capacity of said wireless interconnection.

33. The method of claim 32 further comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to said receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection.

34. The method of claim 32 wherein said amount of data is reduced if said capacity decreases.

35. The method of claim 32 wherein said amount of data is increased if said capacity increases.

36. The method of claim 32 wherein said amount of data is reduced if said capacity has decreased over a temporal time period of 1 second.

37. The method of claim 32 wherein said amount of data is increased if said capacity has increased over a temporal time period of 1 second.

38. The method of claim 32 wherein said modifying is based upon a table of data.

39. A method for transmitting data comprising:

(a) estimating the capacity to transmit packets across a wireless interconnection between a transmitter and a receiver;

(b) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said estimate and a delay in estimating said estimate of said capacity of said wireless interconnection and subsequently sending data across said wireless interconnection based on said estimate.

40. The method of claim 39 further comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to said receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection.

41. The method of claim 39 wherein said amount of data is reduced if said capacity decreases.

42. The method of claim 39 wherein said amount of data is increased if said capacity increases.

43. The method of claim 39 wherein said modifying is based upon a table of data.

44. A method for transmitting data including video information comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data including video information to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to a user;

(d) modifying said first average rate wherein said first average rate is permitted to increase by no more than 50 percent;

(e) defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said modified first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein a time interval exists between said second plurality of packets and said third plurality of packets;

(f) transmitting said third plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to said user.

45. The method of claim 44 wherein said first average rate is permitted to increase by no more than 40 percent.

46. The method of claim 44 wherein said first average rate is permitted to increase by no more than 30 percent.

47. The method of claim 44 wherein said first average rate is permitted to increase by no more than 20 percent.

48. The method of claim 45 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

49. The method of claim 46 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

50. The method of claim 47 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

51. The method of claim 44 wherein said first average rate is permitted to increase by no more than 10 percent.

52. The method of claim 51 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

53. A method for transmitting data including video information comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data including video information to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to a user;

(d) modifying said first average rate wherein said first average rate is permitted to decrease by no less than 10 percent;

(e) defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said modified first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein a time interval exists between said second plurality of packets and said third plurality of packets;

(f) transmitting said third plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to said user.

54. The method of claim 53 wherein said modified first average rate is permitted to decrease no less than 80 percent.

55. The method of claim 53 wherein said modified first average rate is permitted to decrease no less than 60 percent.

56. The method of claim 53 wherein said modified first average rate is permitted to decrease not less than 40 percent.

57. The method of claim 53 wherein said modified first average rate is permitted to decrease not less than 30 percent.

58. The method of claim 53 wherein said modified first average rate is permitted to decrease not less than 20 percent.

59. The method of claim 53 wherein said second plurality of packets is a burst.

60. The method of claim 54 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

61. The method of claim 55 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

62. The method of claim 56 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

63. The method of claim 57 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

64. The method of claim 58 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

65. The method of claim 59 wherein said third plurality of packets is a burst.

66. A method for transmitting data including video information comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data including video information to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to a user;

(d) modifying said first average rate wherein said first average rate is permitted to decrease in an amount greater than it is permitted to increase;

(e) defining a third average rate to transmit a third plurality of said packets of said data comprising a plurality of said first plurality of packets and none of said second plurality of packets, wherein said third average rate is greater than said modified first average rate, wherein said third plurality of packets is less than said first plurality of packets, wherein a time interval exists between said second plurality of packets and said third plurality of packets;

(f) transmitting said third plurality of packets from a transmitter to a receiver over a wireless interconnection for presentation to said user.

67. The method of claim 66 wherein said first average rate is modified as a result of estimating the bandwidth of said wireless interconnection.

68. A method for transmitting video data comprising:

(a) estimating the capacity to transmit packets across a wireless interconnection between a transmitter and a receiver;

(b) modifying the transmission of video data across said wireless interconnection in response to said estimating of said video capacity and a variability in said video capacity.

69. The method of claim 68 wherein said variability is based upon previous estimations of said capacity for said wireless interconnection.

70. The method of claim 68 wherein said variability is based upon anticipated variations in said capacity for said wireless interconnection.

71. The method of claim 68 wherein said modifying is based upon a table of data.

72. A method for transmitting data packets comprising:

(a) estimating the capacity to transmit data packets across a wireless interconnection between a transmitter and a receiver;

(b) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said estimating.

73. The method of claim 72 further comprising the step of inferring a condition of said capacity of said wireless interconnection based upon said capacity and said modifying based upon said interring.

74. The method of claim 72 further comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to said receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data comprising a plurality of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to a receiver over a wireless interconnection.

75. The method of claim 72 wherein said amount of data is reduced if said capacity decreases.

76. The method of claim 72 wherein said amount of data is increased if said capacity increases.

77. The method of claim 72 wherein said modifying is based upon a table of data.

78. A method for transmitting video data packets comprising:

(a) estimating the capacity to transmit data packets across a wireless interconnection between a transmitter and a receiver;

(b) modifying the rate of transmission of video data across said wireless interconnection based upon said estimating;

(c) wherein said modifying utilizes at least one lookup table.