Apparatus for delivery of multiple media data streams, and method therefor

• US 6,963,590 B1
• Filed: 06/11/2001
• Issued: 11/08/2005
• Est. Priority Date: 06/11/2001
• Status: Active Grant

• Current Assignee: Advanced Micro Devices, Inc.
• Original Assignee: Advanced Micro Devices, Inc.
• Inventors: Mann, Daniel, Cohen, Andrew
• Primary Examiner(s): Phunkulh, Bob A.
• Application Number:
  US09/879,256
• Time in Patent Office: 1,611 Days
• Field of Search: 370/535, 370/536, 370/537, 370/538, 370/540, 370/542, 348/385.1, 348/423.1
• US Class Current: 370/535
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 65/764 at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4344 Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
• 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 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04N 7/52 Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal assembling of a multiplex stream by combining a video stream with other content or additional data, remultiplexing of multiplex streams, insertion of stuffing bits into the multiplex stream, assembling of a packetised elementary stream at server side H04N21/236; disassembling of a multiplex stream, remultiplexing of multiplex streams, extraction or processing of Service Information, disassembling of packetised elementary stream at client side H04N21/434

Abstract

An apparatus and method for integrating the delivery of data from a multiplicity of sources to a set of user electronic devices that present audio, video and digital information to the user is implemented. These devices may include conventional television displays, personal computers, and other conventional audio and video equipment. Information may be received from a multiplicity of sources which may include may include digital television via terrestrial or satellite broadcast, terrestrial analog radio, and digital data exchanged via a public network, such as the Internet. The mechanism of the present invention receives the multiplicity of data streams, processes them in accordance with each stream'"'"'s formatting protocols (whether an analog stream, an MPEG Transport Stream, or TCP/IP stream, for example), including any conditional access protocols, and streams the processed data, in multiplexed transport stream to the user'"'"'s presentation devices via a “fat” pipe, such as a FireWire™ bus. A thin client interface decodes the streamed data addressed to its corresponding presentation device.

Claims

1. A media server apparatus comprising:

a plurality of demultiplexers each operable for demultiplexing a data stream formatted in accordance with a first predetermined protocol, each demultiplexer outputting a set of elementary streams each having a format in accordance with a second predetermined protocol, and wherein a first one of said plurality of demultiplexers is operable for receiving said data stream from a first source, and a second one of said plurality operable for receiving said data stream from a second source;

conditional access logic operable for receiving one or more controlled access data streams in said set of elementary streams, said conditional access logic outputting one or more descrambled data streams in response to corresponding ones of said controlled access data streams; and

a multiplexer coupled to said plurality of demultiplexers, said multiplexer operable for receiving one or more demultiplexed streams from each set of demultiplexed streams and said one or more descrambled data streams and outputs a multiplexed data stream having a format in accordance with a third predetermined protocol.

2. The apparatus of claim 1 wherein said first and second predetermined protocols are the same.

3. The apparatus of claim 1 wherein said first predetermined protocol corresponds to an MPEG-2 specification.

4. The apparatus of claim 1 further comprising a first switch coupled to said plurality of demultiplexers and said conditional access logic, said first switch operable for switching a selected one of said one or more controlled access streams between a corresponding one of said plurality of demultiplexers and said controlled access logic.

5. The apparatus of claim 1 further comprising a central processing unit (CPU)coupled to said plurality of demultiplexers and said multiplexer, said CPU receiving a set of control data from said plurality of demultiplexers and outputting a first control signal, operable for addressing said multiplexed data stream in accordance with a predetermined link layer protocol, to said multiplexer, said first control signal being output in response to said set of control data.

6. The apparatus of claim 1 wherein a predetermined link-layer protocol comprises a link-layer protocol in accordance with a FireWire™

bus specification.

7. The apparatus of claim 1 wherein a predetermined link-layer protocol comprises a link-layer protocol in accordance with a Fast Ethernet bus specification.

8. The apparatus of claim 5 further comprising an interface unit coupling said CPU is coupled and said plurality of demultiplexers, said interface unit being operable for communication said first control signal between said CPU and said plurality of demultiplexers.

9. The apparatus of claim 8 wherein said interface unit is operable for receiving a data stream from a third source, said data stream from said third source having a format in accordance with a fourth predetermined protocol, said interface unit outputting said data stream from said third source to a selected one of said plurality of demultiplexers in response to a second control signal from said CPU.

10. The apparatus of claim 1 further comprising a network encoder operable for receiving said multiplexed data stream and outputting an output data stream encapsulated in accordance with a predetermined data-link-layer protocol.

11. A media server system comprising:

a plurality of demultiplexers each operable for demultiplexing a data stream formatted in accordance with a first predetermined protocol, each demultiplexer outputting a set of demultiplexed streams each having a format in accordance with a second predetermined protocol, and wherein a first one of said plurality of demultiplexers is operable for receiving said data stream from a first source, and a second one of said plurality of demultiplexers operable for receiving said data stream from a second source;

first interface circuitry operable for receiving information signals from a plurality of sources and outputting said first and second data streams from said first source and said second source;

conditional access logic operable for receiving one or more controlled access data streams in said set of demultiplexed streams, said conditional access logic outputting one or more descrambled data streams in response to corresponding ones of said controlled access data streams;

a multiplexer coupled to said plurality of demultiplexers, said multiplexer operable for receiving one or more demultiplexed stream from each set of demultiplexed streams and said one or more descrambled data streams and outputs a multiplexed data stream having a format in accordance with a third predetermined protocol; and

a network encoder operable for receiving said multiplexed data stream and outputting an output data stream encapsulated in accordance with a predetermined data-link-layer protocol.

12. The system of claim 11 wherein said first and second predetermined protocols are the same.

13. The system of claim 11 wherein said first protocol corresponds to an MPEG-2 specification.

14. The system of claim 11 further comprising a first switch coupled to said plurality of demultiplexers, and said conditional access logic, said first switch operable for switching a selected one of said one or more controlled access streams between a corresponding one of said plurality of demultiplexers and said controlled access logic.

15. The system of claim 11 further comprising a central processing unit (CPU)coupled to said plurality of demultiplexers and said multiplexer, said CPU receiving a set of control data from said plurality of demultiplexers and outputting a first control signal, operable for addressing said multiplexed data stream in accordance with said predetermined link layer protocol, to said multiplexer, said first control signal being output in response to said set of control data.

16. The system of claim 11 wherein said predetermined link-layer protocol comprises a link-layer protocol in accordance with a FireWire™

bus specification.

17. The system of claim 11 wherein said predetermined link-layer protocol comprises a link-layer protocol in accordance with a Fast Ethernet bus specification.

18. The system of claim 15 further comprising an interface unit coupling said CPU is coupled and said plurality of demultiplexers, said interface unit being operable for communication said first control signal between said CPU and said plurality of demultiplexers.

19. The system of claim 18 wherein said interface unit is operable for receiving a data stream from a third source, said data stream from said third source having a format in accordance with a fourth predetermined protocol, said interface unit outputting said data stream from said third source to a selected one of said plurality of demultiplexers in response to a second control signal from said CPU.

20. The system of claim 11 further comprising a controlled access input/output (I/O) device operable for receiving a controlled access user token;

said controlled access I/O device operable for receiving access control information from said controlled access logic and outputting authentication information to said controlled access logic in response to thereto.

21. A media server method comprising the steps of:

receiving a plurality of media streams, one or more of said media streams comprises multiplexed data;

demultiplexing said one or more of said media streams comprising multiplexed data to form a plurality of elementary streams;

descrambling a first one of said plurality of elementary streams in response to controlled access information in said first one of said plurality of elementary streams, to form a descrambled stream; and

multiplexing said descrambled stream and remaining ones of said elementary stream to form a transport stream.

22. The method of claim 21 further comprising the step of sending said transport stream to one or more networked user presentation devices.

23. The method of claim 21 wherein a first one of said media streams is encoded in accordance with a first predetermined protocol and a second one of said plurality of media streams is encoded in accordance with a second predetermined protocol.

24. The method of claim 23 further comprising the step of multiplexing said second one of said plurality of media streams in said transport stream.

25. The method of claim 24 wherein said second one of said plurality of media streams is multiplexed in said transport stream by encapsulating said second predetermined protocol in accordance with said first predetermined protocol.

26. The method of claim 21 further comprising the step of encoding said transport stream in accordance with a predetermined link-layer protocol.