IP Library Granted Patent US 7,937,640
Granted Patent B2
US 7,937,640 · App. 11/641,988 · Granted May 3, 2011

Video over IP network transmission system

Assignee: AT&T Intellectual Property I, L.P.
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Quick Facts
Patent No.
US 7,937,640
App. No.
11/641,988
Granted
May 3, 2011
Kind
B2
Abstract

Methods are disclosed for maintaining a quality video stream in Internet Protocol (IP) mode include dynamically adjusting IP packet-loss periods and loss distances between IP packet-loss events.

Claims (25)

1. A method for an internet protocol television (IPTV) network, comprising:

comparing a pre-selected error profile, to a first-observed error profile in an IPTV network, wherein each of the pre-selected error profile and the first-observed error profile include a loss period measured in sequential packets and a loss distance measured in a packet count between two spaced-apart and adjacent loss periods; and

instructing a FEC transmitter-generator to generate a first error profile that is proportional to the first-observed error profile.

2. The method of claim 1 , wherein instructing the FEC transmitter-generator includes instructing the FEC transmitter-generator to match exactly the first error profile to the first-observed error profile.

3. The method of claim 1 , further including after instructing the method including:

comparing the first error profile to a second-observed error profile; and

instructing the FEC transmitter-generator to generate a second error profile that is proportional to the second-observed error profile.

4. The method of claim 3 , wherein instructing the FEC transmitter-generator includes instructing the FEC transmitter-generator to match exactly the second error profile to the second-observed error profile.

5. The method of claim 1 , further including receiving an IPTV transmission at a forward error-correction (FEC) transmitter-generator at an edge of the IPTV network, followed by recognizing the first-observed error profile.

6. A system comprising:

memory having a repository with a given home internet protocol (IP) network;

a forward error-correction (FEC) transmitter-generator; and

a FEC retransmitter-regenerator, and wherein the memory includes:

instructions for receiving an IPTV transmission at a forward error-correction (FEC) transmitter-generator, and recognizing a first-observed error profile, including a loss period measured in sequential packets and a loss distance measured in a packet count between two spaced-apart and adjacent loss periods;

instructions for comparing a pre-selected error profile, to the first-observed error profile; and

instructions for generating a first error profile that is proportional to the first-observed error profile.

7. The system of claim 6 , wherein the instructions for generating include instructions for matching exactly the first error profile to the first-observed error profile.

8. The system of claim 6 , further including:

instructions for comparing the first error profile to a second-observed error profile; and

instructions for generating a second error profile that is proportional to the second-observed error profile.

9. A machine-accessible medium having instructions embedded thereon, the instructions when accessed by an IP home network perform the method of:

comparing a pre-selected error profile in an internet protocol (IP) television transmission, to a first-observed error profile;

instructing a transmitter-generator attached to the IP home network to generate a first error profile that is proportional to the first-observed error profile; and

receiving an IPTV transmission at the forward error-correction (FEC) transmitter generator, and recognizing the first-observed error profile, including a loss period measured in sequential packets and a loss distance measured in a packet count between two spaced-apart and adjacent loss periods.

10. The medium of claim 9 , wherein the instructions are lodged in the FEC transmitter-generator.

Assignments (2)
CHANGE OF NAME Recorded May 19, 2009
From: SBC KNOWLEDGE VENTURES, L.P.; AT&T KNOWLEDGE VENTURES, L.P.
To: AT&T INTELLECTUAL PROPERTY I, L.P.
Reel/Frame 022706/0011 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 18, 2006
From: COSTA, PIERRE; ANSARI, AHMAD C.; HARTMAN, DAVID B.; REED, VERNON D.
To: AT&T KNOWLEDGE VENTURES, L.P.
Reel/Frame 018705/0441 →
Continuity (1)
Related Publication 20080148329A1 · Jun 19, 2008