Method and system for controlling a processing of video data

• US 7,712,121 B2
• Filed: 02/12/2001
• Issued: 05/04/2010
• Est. Priority Date: 02/18/2000
• Status: Expired due to Fees

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Schieder, Andreas, Horn, Uwe
• Primary Examiner(s): Shang; Annan Q
• Application Number:
  US09/780,416
• Publication Number:
  US 20010022000A1
• Time in Patent Office: 3,368 Days
• Field of Search: 725/2, 725/107, 725 91- 97, 725114-117, 725/146, 714/1, 714/2, 714/48, 714746-752, 341/94, 341/173, 375/224, 375/286, 375/288, 455/8, 455/14, 455/423, 455418-420, 455/425, 455/432.1, 455/432.2, 4554351-4353, 455436-444, 455/550.1, 455/553, 455524-525, 455/517, 370/321, 370/328, 370/329, 370331-339
• US Class Current: 725/93
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04N 21/234327 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/440227 by decomposing into layers, e.g. base layer and one or more enhancement layers
• CPC Class Codes: H04N 21/631 Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
• 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 21/658 Transmission by the client directed to the server

Abstract

The application describes a method and system for controlling a processing of video data such that the video data may be transmitted over a connection in a communication network, where the connection employs a plurality of protocol layers. The processing of video data for transmission is performed at a first layer. A value or values of one or more transmission condition parameters indicative of transmission conditions in the network are acquired, where these transmission condition parameters are specific for a second layer provided lower than the first layer. Then one or more values of one or more video control parameters usable at the first layer are derived from the value of the least one transmission condition parameter and the processing of video data is performed in accordance with the derived one or more values.

Claims

1. A method for controlling a processing of video data including coding or transcoding of video data such that said video data may be transmitted over a connection in a communication network from a source to a receiver, said connection employing a plurality of protocol layers, said method including:

performing said controlling of the processing of video data at a first application layer in said source,

acquiring from a network control element separate from said source and said receiver a value of one or more transmission condition parameters indicative of transmission conditions in the network, where said one or more transmission condition parameters are specific for a second layer provided lower than said first application layer,

deriving one or more values of one or more video control parameters from said value of said at least one transmission condition parameter,

providing to said first application layer said derived one or more values, and

performing at said first application layer said controlling of the processing of video data including coding or transcoding of video data in accordance with said derived one or more values,

wherein said communication network includes a wireless communication network, said connection comprises a radio link for transporting a mobile communication including video data between a mobile station in said wireless communication network and a radio base station in said wireless communication network, said mobile station being currently located in a first cell coverage area, and said one or more transmission condition parameters include information pertaining to one or more handover conditions associated with handing over the mobile communication to a second cell coverage area, and

wherein the information pertaining to one or more handover conditions includes information relating to a capacity of the second cell for adapting the coding or transcoding of video data in accordance with that information.

2. The method of claim 1, wherein said one or more values of said one or more transmission condition parameters are acquired at said second layer on a sending side of said predetermined link.

3. The method of claim 1, wherein said second layer is a link layer.

4. The method of claim 1, wherein said communication network is a wireless communication network, and said method is applied to the processing of video data in one or more of a mobile station in said wireless communication network, a base station in said wireless communication network, an interworking function between said wireless communication network and a fixed network, a terminal device in said fixed network, and a proxy server provided in said wireless communication network or said fixed network.

5. The method of claim 1, wherein said processing of video data comprises the forward error correction of said video data.

6. The method of claim 1, wherein said processing of video data comprises the packetization of said video data.

7. The method of claim 1, wherein said one or more transmission condition parameters are selected from a group consisting of the current transmission delay, the bandwidth allocated for a specific user, the current bit error rate, and the current frame erasure rate.

8. The method of claim 1, further comprising transmitting said video data in scalable form by having a base stratum and at least one enhancement stratum, and by deciding on the inclusion or exclusion of said enhancement stratum in the transmitted video data on the basis of the derived one or more values of said one or more video control parameters.

9. The method of claim 1, further comprising transmitting said video data in scalable form by having at least two independent bitstreams of video data, and by selecting between said at least two independent bitstreams on the basis of the derived one or more values of said one or more video control parameters, the selected bitstream being the transmitted video data.

10. The method of claim 1, wherein said one or more transmission condition parameters include one or more additional transmission condition parameters selected from a group including a current transmission delay on the radio link, a bandwidth allocated for a specific user on the radio link, a current bit error rate on the radio link, a current frame erasure rate, a current carrier to interface ratio on the radio link, and a current power-level on the radio link.

11. A computer program product loadable into a computer-readable memory for a digital computer device, including software code portions for performing the method of claim 1 when said computer program product is run on said computer device.

12. A computer-readable storage medium storing the computer program product of claim 11 stored thereon.

13. A transmitting system for transmitting video data over a connection in a communication network from a source to a receiver that employs a plurality of protocol layers, comprising:

a processing element in said source arranged to process video data to be transmitted at a first application layer including to code or transcode video data,

an acquisition element arranged to acquire from a network control element separate from said source and receiver a value of one or more transmission condition parameters indicative of a transmission condition associated with said connection, said one or more transmission condition parameters being specific for a second layer lower than said first layer, and

a deriving element for deriving one or more values of one or more video control parameters from said value of said one or more transmission condition parameters, said deriving element being arranged to provide said derived one or more values to said processing element at said first application layer,

where said processing element is arranged to control the processing of video data including coding or transcoding video data at said first application layer based on said derived one or more values,

wherein said communication network includes a wireless communication network, said connection comprises a radio link for transporting a mobile communication including video data between a mobile station in said wireless communication network and a radio base station in said wireless communication network, said mobile station being currently located in a first cell coverage area, and said one or more transmission condition parameters include information pertaining to one or more handover conditions associated with handing over the mobile communication to a second cell coverage area, and

wherein the information pertaining to one or more handover conditions includes information relating to a capacity of the second cell for adapting the coding or transcoding of video data in accordance with that information.

14. The transmitting system according to claim 13, wherein said acquisition element is a part of a control element provided for controlling the transmission of data over a predetermined link forming part of said connection, where said one or more transmission condition parameters are indicative of a transmission condition associated with said predetermined link.

15. The transmitting system of claim 14, wherein said one or more transmission condition parameters are selected from a group consisting of the current transmission delay on the link, the bandwidth allocated for a specific user on the link, the current bit error rate on the link, and the current frame erasure rate on the link.

16. The transmitting system of claim 13, wherein said acquisition element is arranged such that said one or more values of said one or more transmission condition parameters are acquired at said second layer on a sending side of said radio link.

17. The transmitting system of one of claim 13, wherein said second layer is a link layer.

18. The transmitting system claim 13, wherein said processing element is provided in one or more of a mobile station in said wireless network, a base station in said wireless network, an interworking function between said wireless network and a fixed network, a terminal device in said fixed network, and a proxy server provided in said wireless network or said fixed network.

19. The transmitting system of claim 18, wherein said processing element, said acquisition element and said element for deriving values of video control parameters are all provided in one unit.

20. The transmitting system of claim 18, wherein said acquisition element is provided in a different unit than said processing element.

21. The transmitting system of claim 20, wherein said processing element is provided in one of a terminal device of said fixed network and a proxy server, and said acquiring element is provided in a base station of said wireless network.

22. The transmitting system of claim 13, wherein said processing element is arranged to perform forward error correction of said video data.

23. The transmitting system of claim 13, wherein said processing element is arranged to perform packetization of said video data.

24. The transmitting system of claim 13, wherein said one or more transmission condition parameters include one or both of the current carrier to interface ratio on the radio link and the current power-level on the radio link.

25. The transmitting system of claim 13, wherein said processing element is arranged to control the transmission of said video data in scalable form by having a base stratum and at least one enhancement stratum, and is arranged to decide on the inclusion or exclusion of said enhancement stratum in the transmitted video data on the basis of the derived one or more values of said one or more video control parameters.

26. The transmitting system of claim 13, wherein said processing element is arranged to control the transmission of said video data in scalable form by having at least two independent bitstreams of video data, and is arranged to select between said at least two independent bitstreams on the basis of the derived one or more values of said one or more video control parameters, the selected bitstream being the transmitted video data.

27. The transmitting system of claim 13, wherein said one or more transmission condition parameters include one or more additional transmission condition parameters selected from a group including a current transmission delay on the radio link, a bandwidth allocated for a specific user on the radio link, a current bit error rate on the radio link, a current frame erasure rate, a current carrier to interface ratio on the radio link, and a current power-level on the radio link.

28. A transmitting unit for transmitting to a receiver video data over a connection in a communication network that employs a plurality of protocol layers, comprising:

a processing element arranged to process video data to be transmitted at an application first layer including to code or transcode video data,

an acquisition element arranged to acquire from a network control element separate from said transmitting unit and said receiver a value of one or more transmission condition parameters indicative of a transmission condition associated with said connection, said one or more transmission condition parameters being specific for a second layer lower than said first application layer, and

a deriving element for deriving one or more values of one or more video control parameters from said value of said one or more transmission condition parameters, said deriving element being arranged to provide said derived one or more values to said processing element at said first application layer,

where said processing element is arranged to control the processing of video data including coding or transcoding video data at said first application layer based on said derived one or more values,

wherein said communication network includes a wireless communication network, said connection comprises a radio link for transporting a mobile communication including video data between a mobile station in said wireless communication network and a radio base station in said wireless communication network, said mobile station being currently located in a first cell coverage area, and said one or more transmission condition parameters include information pertaining to one or more handover conditions associated with handing over the mobile communication to a second cell coverage area, and

wherein the information pertaining to one or more handover conditions includes information relating to a capacity of the second cell for adapting the coding or transcoding of video data in accordance with that information.

29. The transmitting unit of claim 28, wherein said unit is one of a mobile station in said wireless network, a base station in said wireless network, an interworking function between said wireless network and a fixed network, a terminal device in said fixed network, and a proxy server provided in said wireless network or said fixed network.

30. The transmitting unit of claim 28, wherein said one or more transmission condition parameters include one or more additional transmission condition parameters selected from a group including a current transmission delay on the radio link, a bandwidth allocated for a specific user on the radio link, a current bit error rate on the radio link, a current frame erasure rate, a current carrier to interface ratio on the radio link, and a current power-level on the radio link.