Data delivery in set-top box

• US 7,023,858 B2
• Filed: 03/16/2001
• Issued: 04/04/2006
• Est. Priority Date: 04/14/2000
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Ozawa, Toshiro, Kimble, David
• Primary Examiner(s): Ngo, Ricky Q.
• Assistant Examiner(s): Mew, Kevin
• Application Number:
  US09/809,850
• Publication Number:
  US 20010030959A1
• Time in Patent Office: 1,845 Days
• Field of Search: 370/386, 370/395.5, 370/466, 370/474, 370/401, 370/409, 370/395.1, 370/396, 370/397, 370/398, 370/399
• US Class Current: 370/399
• CPC Class Codes: H04L 47/621 Individual queue per connection or flow, e.g. per VC
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4438 Window management, e.g. event handling following interaction with the user interface
• 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 21/4782 Web browsing , e.g. WebTV
• CPC Class Codes: H04N 21/4821 using a grid, e.g. sorted out by channel and broadcast time
• CPC Class Codes: H04N 21/6118 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 21/64307 ATM
• CPC Class Codes: H04N 21/84 Generation or processing of descriptive data, e.g. content descriptors systems specially adapted for using meta-information in broadcast systems H04H60/73
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 7/163 by receiver means only

Abstract

A method and apparatus for managing ATM formatted MPEG SI data in a television set-top box. A virtual channel indicator (VCI) is used to associate a segment of SI data with a virtual channel. An ATM processor receives a stream of ATM packets containing SI data from an out-of-band tuner. The ATM packets include the VCI in a header thereof. The ATM processor stores the SI data in a buffer memory associated with the VCI for retrieval by the ATM processor at the request of the STB system processor.

Claims

1. A method of managing digital video SI (Service information) data when said SI data are not time multiplexed in the same transport stream as its associated video data, comprising:

receiving a digital video inband transport stream with video data for each program segregated by Packet Identifiers (PID), so that each program in the digital video inband transport stream is identified by an associated PID;

wherein the digital video inband transport stream does not contain SI data associated with and time multiplexed with the digital video data;

receiving an out of band Asynchronous Transfer Mode (ATM) packet containing the digital video SI data, the ATM packet having a virtual channel indicator (VCI) in a header thereof associating the type of SI data in the ATM packet with a virtual channel;

storing the SI information in a memory associated with the VCI; and

retrieving the SI information from the memory associated with the VCI upon request of a system processor.

2. The method according to claim 1, wherein the receiving and storing are carried out by an ATM packet processor.

3. The method according to claim 2, wherein the system processor comprises a main processor of a television set-top box.

4. The method according to claim 1, wherein the storing comprises storing the SI information in a buffer memory associated with the VCI.

5. The method according to claim 4, wherein the buffer memory is one of a plurality of buffer memories, each associated with one of the VCIs.

6. The method according to claim 1, wherein the ATM packet is received as one of a stream of ATM packets from an out-of-band tuner.

7. The method according to claim 1, wherein the VCI and SI data are formatted as an ATM packet at a cable television service provider head end.

8. The method according to claim 1, carried out in a television set-top box.

9. The method according to claim 1, carried out in a television system.

10. A television apparatus, comprising:

a receiver receiving an MPEG digital video data transport stream including MPEG (Moving Pictures Expert Group) video data via an inband channel and converting the MPEG video data to a video signal, wherein said MPEG digital video transport stream does not contain SI (Service Information) data, and wherein each program in the MPEG digital video data transport stream is identified by an associated Packet identifier (PID);

an ATM (Asynchronous Transfer Mode) interface, receiving a stream of ATM packets that are frequency multiplexed over an out of band channel with the video data stream, the ATM packets carrying SI data and having a header carrying a virtual channel indicator (VCI), the VCI associating the type of SI data with a virtual channel;

the ATM interface comprising;

an ATM processor;

a plurality of buffer memories, one buffer memory for each of a plurality of virtual channels, each virtual channel associated with a type of SI data; and

wherein, upon receipt of an ATM packet, the ATM processor reads the ATM packet'"'"'s VCI and stores SI information associated with that VCI in the buffer memory for the virtual channel indicated by the VCI.

11. The apparatus according to claim 10, further comprising a system processor, wherein the system processor obtains the SI data by sending a request to the ATM processor and receiving the SI data as a reply.

12. The apparatus according to claim 10, wherein the ATM packet is received as one of a stream of ATM packets from an out-of-band tuner.

13. The apparatus according to claim 10, wherein the VCI and SI data are formatted as an ATM packet at a cable television service provider head end.

14. The apparatus according to claim 10, further comprising an in band tuner receiving video information.

15. The apparatus according to claim 11, wherein the system processor and the ATM processor are both coupled to a system bus, and wherein the request and reply are communicated over the system bus.

16. The apparatus according to claim 10, wherein the television apparatus comprises one of a television and a television set-top box.

17. A method of supplying digital video SI (Service Information) data over a cable network when said SI data are not time multiplexed in a transport stream with associated video data, comprising:

associating an SI data segment of an SI table type with a virtual channel Identifier (VCI) specific to that SI table type;

packaging the SI data segment in a data area of an ATM (Asynchronous Transfer Mode) packet;

placing the VCI in a header of the ATM packet; and

transmitting the packet via an out of band channel over the cable network that carries associated video data via an inband channel, wherein the video data are segregated by channel using Packet Identifiers (PIDs), so that each program in the digital video inband transport stream is identified by an associated PID.

18. The method according to claim 17, further comprising:

receiving the ATM packet containing the SI data with the VCI in the header;

storing the SI information in a memory associated with the VCI; and

retrieving the SI information from the memory upon request of a system processor.

19. The method according to claim 18, wherein the receiving and storing are carried out by an ATM packet processor.

20. The method according to claim 19, wherein the system processor comprises a main processor of a television set-top box.

21. The method according to claim 18, wherein the storing comprises storing the SI information in a buffer memory associated with the VCI.

22. The method according to claim 21, wherein the buffer memory is one of a plurality of buffer memories, each associated with one of the VCIs.

23. The method according to claim 17, wherein the ATM pocket is transmitted as one of a stream of ATM packets.

24. The method according to claim 17, carded out in one of a television and a television set-top box.

25. An electronic storage medium containing instructions which, when executed on a programmed processor, carry out a method of managing digital video SI (Service Information) data when said SI data are not time multiplexed in the same transport stream as its associated video data, comprising:

receiving a digital video inband transport stream with video data for each program segregated by Packet Identifiers (PID), so that each program in the digital video inband transport stream is identified it'"'"'s associated PID;

wherein the digital video inband transport stream does not contain SI data associated with and time multiplexed with the digital video data;

receiving an out of band Asynchronous Transfer Mode (ATM) packet containing the digital video SI data, the ATM packet having a virtual channel indicator (VCI) in a header thereof associating the type of SI data in the ATM packet with a virtual channel;

storing the SI information in a memory associated with the VCI; and

retrieving the SI information from the memory associated with the VCI upon request of a system processor.

26. The electronic storage medium according to claim 25, wherein the receiving and storing are carried out by an ATM packet processor.

27. The electronic storage medium according to claim 26, wherein the system processor comprises a main processor of a Television Set-Top Box.

28. The electronic storage medium according to claim 25, wherein the storing comprises storing the SI information in a buffer memory associated with the VCI.

29. The electronic storage medium according to claim 28, wherein the buffer memory is one of a plurality of buffer memories, each associated with one of the VCIs.

30. The electronic storage medium according to claim 25, wherein the ATM packet is received as one of a stream of ATM packets from an out-of-band tuner.

31. The electronic storage medium according to claim 25, wherein the VCI and SI data are formatted as an ATM packet at a cable television service provider head end.

32. The electronic storage medium according to claim 25 forming a part of one of a television and a television set-top box.

33. A method of supplying digital video SI (Service Information) data over a cable television network wherein said SI data are not time multiplexed in the same transport stream as its associated video data, comprising:

at a cable television system head end;

associating an SI data segment of an SI table type with a virtual channel identifier (VCI) specific to that SI table type;

packaging the SI data segment in a data area of an ATM (Asynchronous Transfer Mode) packet;

placing the VCI in a header of the ATM packet;

transmitting the ATM packet as part of a stream of ATM packets via an out of band channel over the cable television network that carries an associated video data transport stream via an inband channel, wherein the video data transport stream inband channel does not contain SI data, and wherein the video data for each program are segregated by channel using Packet Identifiers (PIDs), so that each program in the digital video inband transport stream is identified by it'"'"'s associated PID;

at a television set top box;

receiving the video data transport stream via the inband channel;

receiving a stream of ATM packets via an out of band channel;

at an ATM packet processor of the set top box, receiving the ATM packet containing the SI data with the VCI in the header via the out of band channel and storing the SI information in a buffer memory that is specifically associated with that VCI and thus associated with the SI table type;

wherein the storing comprising updating the SI table in the buffer memory with most recently received SI data;

wherein the buffer memory is one of a plurality of buffer memories, each associated with one of the VCIs and thus one SI table type; and

retrieving the SI information from the one of the plurality of buffer memories upon request of a system processor, wherein the system processor comprises a main processor of the television set-top box.