CA2554881A1 - Method for the transmission and distribution of digital television signals - Google Patents

Method for the transmission and distribution of digital television signals Download PDF

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Publication number
CA2554881A1
CA2554881A1 CA002554881A CA2554881A CA2554881A1 CA 2554881 A1 CA2554881 A1 CA 2554881A1 CA 002554881 A CA002554881 A CA 002554881A CA 2554881 A CA2554881 A CA 2554881A CA 2554881 A1 CA2554881 A1 CA 2554881A1
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CA
Canada
Prior art keywords
signal
data
network
video
sdi
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Granted
Application number
CA002554881A
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French (fr)
Other versions
CA2554881C (en
Inventor
Scott Beaudoin
Scott Jones
Scott Brillhart
Michael Brown
Ryan Korte
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Level 3 Communications LLC
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Individual
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Publication of CA2554881C publication Critical patent/CA2554881C/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64707—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless for transferring content from a first network to a second network, e.g. between IP and wireless

Abstract

A system for the end-to-end delivery of digital television signals. In a preferred embodiment a digital television signal is: received from production equipment typically in HD format at approximately 1.4 gigabits per second (Gbbps); the received signal is transmitted to a venue point-of-presence;
converted for transmission via a 270 Mbpc local loop; transmitted to a fiber network point of presence/video service edge; packetized into TCP/IP packets in a video gateway; and routed to one or more destination addresses via the fiber network; received at one or more video service edge destinations;
converted to a digital television format, typically SDI; and either transmitted via a second 270 Mbps local loop for delivery to a customer site and subsequent conversion to a 1.4 Gbps HD signal, or converted directly to a 1.4 Gbs HD signal at the receiving video service edge.

Claims (30)

1. ~A method for transmitting an HD signal from a source location to a destination location comprising the steps of:
(a) ~at a source location, receiving a source HD signal from a video source at an HD data rate;
(b) ~compressing said HD signal to create a compressed HD signal in an SD
format;
(c) ~transmitting said compressed HD signal at an SD data rate from said source location to a first network point-of-presence;
(d) ~in a first video gateway, converting said compressed HD signal into data formatted for transmission via a data network;
(e) ~transmitting said data through a data network to a second network~
point-of presence;
(f) ~in a second video gateway converting said data signal into said compressed HD signal at said SD data rate;
(g) ~decompressing said compressed HD signal into a destination HD signal at said HD data rate; and (h) ~delivering said destination HD signal at a destination location.
2. ~The method for transmitting a compressed HD signal from a source location to a destination location of claim 1 wherein said first and second network points-of-presence are video service edges.
3.~ The method for transmitting a compressed HD signal from a source location to a destination location of claim 1 wherein said data formatted for transmission via a network is formatted as TCP/IP packets.
4. ~The method for transmitting a compressed HD signal from a source location to a destination location of claim 3 wherein said data network is an MPLS network and said first point-of-presence comprises a first label edge router and said second point of presence comprises a second label edge router and wherein step (f) includes the substep of:

(f)(i) tagging said TCP/IP packets with a label in said first label edge router, said label defining said route between said first point-of-presence and said second point-of-presence.
5. The method for transmitting a compressed HD signal from a source location to a destination location of claim 4 wherein said route is defined and reserved according to a schedule prior to performing step(a).
6. The method for transmitting a compressed HD signal from a source location to a destination location of claim 4 wherein said route comprises a GRE tunnel.
7. The method for transmitting a compressed HD signal from a source location to a destination location of claim 6 wherein network traffic along said GRE
tunnel is bidirectional and symmetric paths through said data network are defined for said network traffic.
8. The method for transmitting a compressed HD signal from a source location to a destination location of claim 7, wherein in step (f), said TCP/IP packets are transmitted in a point-to-multipoint fashion to a plurality of label edge routers.
9. The method for transmitting a compressed HD signal from a source location to a destination location of claim 7 further comprising:

(k) transmitting TCP/IP packets containing a return video program through said GRE tunnel from said second point-of presence to said first point-of-presence.
10. The method for transmitting a compressed HD signal from a source location to a destination location of claim 1, wherein said second video gateway comprises a video buffer, and step (h) includes the substeps of:

(h)(i) in a second video gateway converting said second electrical signal into said compressed HD signal at said SD data rate; and (h)(ii) buffering said compressed HD signal in said buffer to remove fitter from said compressed HD signal.
11. The method for transmitting a compressed HD signal from a source location to a destination location of claim 1, wherein said data network is a fiber network.
12. A method for preparing an HD signal for transmission over a data network including the steps of:

(a) receiving an HD signal at a first data rate;

(b) converting said HD signal to an SD signal at a second data rate, said second data rate being lower than said first data rate;

(c) transmitting said SD signal via a 270 Mbps loop to a network point-of-presence;

(d) converting said SD signal into TCP/IP packets in a video gateway for transmission over a data network; and (e) delivering said TCP/IP packets to a router.
13. The method for preparing HD signals for transmission over a data network of claim 12 wherein said first data rate is 1.485 Gbps.
14. The method for preparing HD signals for transmission over a data network of claim 12 wherein said second data rate is 270 Mbps.
15. The method for preparing HD signals for transmission over a data network of claim 12 wherein said first HD signal conforms to SMPTE 292.
16. The method for preparing HD signals for transmission over a data network of claim 12 wherein said first SD signal conforms to SMPTE 259M.
17. The method for preparing HD signals for transmission over a data network of claim 12 wherein said data network is an MPLS network and said router is a label edge router.
18. A system for the end-to-end digital transmission of a video signal comprising:

a mezzanine level system comprising:

an encoder for compressing an HD signal at a first data rate to an SDI
data stream at a second data rate; and a first converter for converting said SDI data stream to an optical signal;

a fiber optic link connecting a second converter for converting said optical signal back to said SDI data stream;

a first video service edge comprising:

an SDI switch for receiving said SDI data stream, said SDI switch connected to said second converter through a 270 Mbps loop;

a first video gateway in communication with said SDI switch for receiving said SDI data stream, wherein said SDI data stream is configured by said first video gateway into packets output through a gateway network connection; and a first router in communication with said first gateway network connection to receive said packets and retransmit said packets via a data network; and a second video service edge comprising:

a second router, said second router receiving said packets from said data network and outputs said packets through a router output;
and a second video gateway in communication with said router output to receive said packets, wherein said second video gateway converts said packets to restore said SDI data stream through a gateway digital output;

a decoder for decompressing said SDI data stream into an uncompressed HD
signal at said first data rate, said decoder in communication with said gateway digital output for receiving said SDI data stream.
19. The system for the end-to-end digital transmission of a video signal of claim 18 wherein said decoder is located at a customer site and said decoder is in communication with said gateway digital output through a 270 Mbps loop.
20. The system for the end-to-end digital transmission of a video signal of claim 18 wherein said second video gateway is located at a customer site and said second video gateway is in communication with said router output through an ethernet switch loop or ethernet local loop.
21. The system for the end-to-end digital transmission of a video signal of claim 18 wherein said second video service edge is located at a customer site.
22. The system for the end-to-end digital transmission of a video signal of claim 18 wherein said packets are TCP/IP packets.
23. The system for the end-to-end digital transmission of a video signal of claim 18 wherein said data network is an MPLS network and said first and second routers and first and second label edge routers, respectively.
24. The system for the end-to-end digital transmission of a video signal of claim 23 wherein said MPLS network is a fiber network.
25. A system for preparing an HD signal for transmission over a data network comprising:

an encoder for compressing an HD signal at a first data rate to an SD data stream at a second data rate;

a video gateway in communication with said encoder to receive said SD data stream, wherein said SD data stream is configured by said video gateway into packets output through a gateway network connection;
and a router in communication with said gateway network connection to receive said packets and transmit said packets over a data network.
26. The system for preparing an HD signal for transmission over a data network of claim 25 wherein said encoder is remote from said video gateway, the system further comprising:

a first converter in communication with said encoder for converting said SD
data stream to an optical signal;

a second converter in communication with said video gateway for converting said optical signal back to said SD data stream; and an optical fiber connecting said first and second converters to carry said optical signal from said first converter to said second converter.
27. The system for preparing an HD signal for transmission over a data network of claim 25 wherein said encoder is remote from said video gateway, the system further comprising a 270 Mbps loop communicating said SD data stream from said encoder to said video gateway.
28. The system for preparing an HD signal for transmission over a data network of claim 25 wherein said encoder is remote from said video gateway, the system further comprising:

a first converter in communication with said encoder for converting said SD
data stream to an optical signal;

a second converter in communication with said video gateway for converting said optical signal back to said SD data stream;

an optical fiber connecting said first and second converters to carry said optical signal from said first converter to said second converter; and a 270 Mbps loop for communicating said SDI data stream from said second converter to said video gateway.
29. A system for preparing a plurality of HD signals for transmission over a data network, the plurality of HD signals originating from a plurality of venues, the system comprising:

a plurality of encoders for compressing said plurality of HD signals into a corresponding plurality of SDI data streams, each encoder being associated with one of venue of said plurality of venues;

a plurality of local digital loops, each local digital loop being in communication with a corresponding encoder of said plurality of encoders for carrying the SDI data stream of said corresponding encoder;

an SDI switch having a plurality of SDI inputs in communication with said plurality of encoders through said plurality of local digital loops, said SDI switch having an SDI output for selectively outputting an individual SDI data stream selected from said plurality of SDI data streams;

a video gateway in communication with said SDI switch to receive said individual SDI data stream, wherein said individual SDI data stream is configured by said video gateway into data packets output through a gateway network connection; and a router in communication with said gateway network connection to receive said data packets and retransmit said data packet over a data network.
30. The system for preparing a plurality of HD signals for transmission over a data network of claim 29 wherein said data network is an MPLS network and said router is a label edge router.
CA2554881A 2004-01-30 2004-12-02 Method for the transmission and distribution of digital television signals Expired - Fee Related CA2554881C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/769,465 2004-01-30
US10/769,465 US8175020B2 (en) 2004-01-30 2004-01-30 Method for the transmission and distribution of digital television signals
PCT/US2004/040223 WO2005076625A1 (en) 2004-01-30 2004-12-02 Method for the transmission and distribution of digital television signals

Publications (2)

Publication Number Publication Date
CA2554881A1 true CA2554881A1 (en) 2005-08-18
CA2554881C CA2554881C (en) 2012-01-10

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US (3) US8175020B2 (en)
EP (2) EP2290981B1 (en)
CA (1) CA2554881C (en)
WO (1) WO2005076625A1 (en)

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Publication number Publication date
US20050169314A1 (en) 2005-08-04
WO2005076625A1 (en) 2005-08-18
US20190124406A1 (en) 2019-04-25
EP1714487A1 (en) 2006-10-25
CA2554881C (en) 2012-01-10
US20120219012A1 (en) 2012-08-30
US10158924B2 (en) 2018-12-18
EP2290981A3 (en) 2012-02-22
EP2290981A2 (en) 2011-03-02
US10827229B2 (en) 2020-11-03
EP2290981B1 (en) 2016-08-24
EP1714487B1 (en) 2017-04-05
US8175020B2 (en) 2012-05-08

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