Methods and apparatus for connecting a cable network to other network and/or devices

• US 8,553,882 B2
• Filed: 04/01/2008
• Issued: 10/08/2013
• Est. Priority Date: 03/16/2006
• Status: Active Grant

• Current Assignee: Time Warner Cable Enterprises LLC (Charter Communications Incorporated)
• Original Assignee: Time Warner Cable Enterprises LLC (Charter Communications Incorporated)
• Inventors: Cholas, Chris, Sarosi, George, Helms, William, Williamson, Louis D.
• Primary Examiner(s): Nalven, Andrew L
• Assistant Examiner(s): FIELDS, COURTNEY D
• Application Number:
  US12/060,852
• Publication Number:
  US 20080247541A1
• Time in Patent Office: 2,016 Days
• Field of Search: 380/210, 370/401, 386/131, 725/62, 375/240.01, 713/189
• US Class Current: 380/210
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0464 using hop-by-hop encryption, i.e. wherein an intermediate entity decrypts the information and re-encrypts it before forwarding it
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• 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 21/440218 by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 conversion of standards in analogue television systems H04N7/01
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/64707 for transferring content from a first network to a second network, e.g. between IP and wireless

Abstract

Methods and apparatus for connecting, e.g., bridging, a cable network to other networks and/or devices is described. A bridge device facilitates the distribution of cable provider content to end users operating IP based devices. The bridge device performs one of more of the following: interface protocol conversions, user device controlled tuner selection, transcoding of data, transrating of a data stream, decryption in accordance with a conditional access protocol and re-encryption in accordance with an authorized service domain protocol.

Claims

1. A method of operating a bridging device including a tuner to provide content, comprising:

receiving content via a cable network;

tuning to a channel specified by an end user device in response to a signal from the end user device;

interfacing between said cable network and said end user device, said interfacing including;

performing a transrating operation to produce a second bitstream having a lower data rate than the data rate of a first bitstream including the received video content; and

communicating said second bitstream to the end user device, said second bitstream communicating encoded video data including video content, received from the cable network on the channel specified by said end user device, to the end user device.

2. The method of claim 1, wherein said end user device is one of:

an IP device, a media capable device, a cell phone, a personal data assistant, or a personal computer.

3. The method of claim 1,

wherein said end user device is coupled to said bridging device via a non-cable network;

and

wherein said non-cable network is one of;

an Ethernet or a wireless network.

4. The method of claim 1, further comprising:

prior to communicating said second bitstream communicating encoded video data including video content to the end user device;

decrypting encrypted video content received from the cable network; and

re-encrypting the decrypted video content using a different encryption method than was used to encrypt the video content received from the cable network, said re-encrypted video content including said encoded video data communicated to the end user device.

5. The method of claim 1, further comprising:

prior to communicating said second bitstream communicating encoded video data including video content to the end user device;

transcoding video content received from the cable network in a first encoded format to produce video content in a second encoded format, said second encoded format being different from the first encoded format, said encoded video data communicated to the end user device including content in said second encoded format.

11. The method of claim 1 further comprising:

receiving content from a first end user device; and

processing the content from the first end user device by performing at least one of;

i) a transcoding or ii) transrating operation to generate processed content; and

transmitting the processed content to a second end user device.

26. The method of claim 4,

wherein said re-encryption is used for digital rights management (DRM);

and

wherein the re-encryption operation uses encryption which depends on which end user the re-encrypted content is to be delivered.

6. A method of operating a bridging device including a tuner to provide content, comprising:

receiving content via a cable network;

tuning to a channel specified by a end user device in response to a signal from the end user device;

interfacing between said cable network and at least one of;

i) a non-cable network or ii) said end user device;

transcoding video content received from the cable network in a first encoded format to produce video content in a second encoded format said second encoded format being different from the first encoded format, said encoded video data communicated to the end user device including content in said second encoded format, said transcoding of the video content producing a second bitstream having a lower data rate than the data rate of a first bitstream including the received video content; and

communicating said second bitstream to the end user device, said second bitstream communicating encoded video data including video content, received from the cable network on the channel specified by said end user device, to the end user device.

7. The method of claim 6, wherein said transcoding is performed as part of said interfacing operation.

8. The method of claim 6, further comprising:

performing a protocol conversion operation to convert between a communications format used by said cable network and a communications format used by said non-cable network.

9. A method of operating a bridging device including a tuner to provide content, comprising:

receiving content via a cable network;

tuning to a channel specified by an end user device in response to a signal from the end user device;

interfacing between said cable network and at least one of;

i) a non-cable network or ii) said end user device; and

wherein said bridging device does not have a video decoder for generating decoded video.

10. A method of operating a bridging device including a tuner to provide content, comprising:

receiving content via a cable network;

tuning to a channel specified by an end user device in response to a signal from the end user device;

interfacing between said cable network and at least one of;

i) a non-cable network or ii) said end user device; and

wherein said bridging device does not have a decoded video output.

12. A method of operating a bridging device including a tuner to provide content, comprising:

receiving content via a cable network;

tuning to a channel specified by an end user device in response to a signal from the end user device;

interfacing between said cable network and at least one of;

i) a non-cable network or ii) said end user device;

receiving content from a first end user device;

determining at least one of a data rate and coding format of content supplied by the first user device;

processing the content from the first end user device by performing at least one of;

a transcoding or ii) transrating operation to generate processed content; and

transmitting the processed content to a second end user device;

wherein transcoding is performed as part of said processing when the coding format of content supplied by the first user device is different from a coding format supported by the second user device; and

wherein transrating is performed as part of said processing when the data rate of content supplied by the first user device is different from a data rate supported by the second user device.

13. A bridging device, comprising:

a cable network interface for receiving content via a cable network;

a second interface for interfacing said bridging device to at least one of i) a non-cable network or ii) an end user device;

a tuner module for tuning to a channel specified by said end user device in response to a signal from the end user device;

a rate determination module adapted to determine a data rate of content supplied by a first end user device; and

a protocol conversion module for performing a protocol conversion between a first protocol used by said cable network interface and a second protocol used by said second interface, said second protocol being different from said first protocol.

14. The bridging of claim 13, wherein said end user device is one of:

an IP device, a media capable device, a cell phone, a personal data assistant, or a personal computer.

15. The bridging device of claim 13,

wherein said second interface interfaces said bridging device to said non-cable network,

wherein said non-cable network is one of:

an Ethernet or a wireless network;

wherein said end user device can be coupled to said bridging device via said non-cable network; and

wherein said second interface includes at least one of a Media over Coax Alliance interface module or an Ethernet Interface module.

16. The bridging device of claim 13,

wherein said second interface interfaces said bridging device to said end user device, and

wherein said second interface includes at least one of a USB interface module, RS422 interface module or RS232 interface module.

17. The bridging device of claim 13, further comprising:

a decryption module for decrypting encrypted video content received from the cable network; and

an encryption module for re-encrypting the decrypted video content using a different encryption method than was used to encrypt the video content received from the cable network, and

wherein output of the encryption module is communicated via the second interface.

18. The bridging device of claim 13, further comprising:

a transcoding module for transcoding video content received from the cable network in a first encoded format to produce video content in a second encoded format, said second encoded format being different from the first encoded format, and

wherein encoded video data communicated to the end user device includes content in said second encoded format.

21. The bridging device of claim 13, wherein said protocol conversion module performs a protocol conversion operation to convert between a communications format used by said cable network and a communications format used by said non-cable network, and

wherein said communications format used by said cable network is a cable modem communications protocol format and wherein said communications format used by said non-cable network is an Ethernet protocol format.

24. The device of claim 13, further comprising:

a coding format determination module adapted to determine a coding format of content supplied by the first end user device.

25. The device of claim 24, further comprising:

a recoding determination module for determining, with regard to content supplied by the first end user device to be communicated to a second end user device, i) if transrating is to be performed, ii) if transcoding is to be performed and iii) if transrating and transcoding is to be performed.

19. A bridging device, comprising:

a cable network interface for receiving content via a cable network;

a second interface for interfacing said bridging device to at least one of i) a non-cable network or ii) an end user device;

a tuner module for tuning to a channel specified by said end user device in response to a signal from the end user device;

a protocol conversion module for performing a protocol conversion between a first protocol used by said cable network interface and a second protocol used by said second interface, said second protocol being different from said first protocol;

a transcoding module for transcoding video content received from the cable network in a first encoded format to produce video content in a second encoded format, said second encoded format being different from the first encoded format, said transcoding module producing a second bitstream having a lower data rate than the data rate of a first bitstream including the received video content, said second bitstream being communicated to the end user device; and

wherein said second bitstream communicated to the end user device communicates encoded video data including content in said second encoded format.

20. A bridging device, comprising:

a cable network interface for receiving content via a cable network;

a second interface for interfacing said bridging device to an end user device, said second interface including at least one of a USB interface module, RS422 interface module or RS232 interface module;

a tuner module for tuning to a channel specified by said end user device in response to a signal from the end user device;

a protocol conversion module for performing a protocol conversion between a first protocol used by said cable network interface and a second protocol used by said second interface, said second protocol being different from said first protocol; and

a transrating module for performing a transrating operation to produce a second bitstream having a lower data rate than the data rate of a first bitstream including the received video content, said second bitstream being communicated to the end user device.

22. A bridging device, comprising:

a cable network interface for receiving content via a cable network;

a second interface for interfacing said bridging device to at least one of i) a non-cable network or ii) an end user device;

a tuner module for tuning to a channel specified by said end user device in response to a signal from the end user device;

a protocol conversion module for performing a protocol conversion between a first protocol used by said cable network interface and a second protocol used by said second interface, said second protocol being different from said first protocol; and

wherein said bridging device does not have a video decoder for generating decoded video.

23. A bridging device, comprising:

a cable network interface for receiving content via a cable network;

a second interface for interfacing said bridging device to at least one of i) a non-cable network and ii) an end user device;

a tuner module for tuning to a channel specified by said end user device in response to a signal from the end user device;

a protocol conversion module for performing a protocol conversion between a first protocol used by said cable network interface and a second protocol used by said second interface, said second protocol being different from said first protocol; and

wherein said bridging device does not have a decoded video output.