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AT&T Intellectual Property
(105 results)-
White Papers
Key Differences Between Web1.0 and Web2.0
February 13, 2008, 12:00am PST
Web 2.0 is a buzzword introduced in 2003/04 which is commonly used to encompass various novel phenomena on the World Wide Web. Although largely a marketing term, some of the key attributes...
Provided by AT&T Intellectual Property
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White Papers
Perceptually-Based Data-Driven Join Costs: Comparing Join Types
January 1, 2009, 12:00am PST
Unit selection synthesis has improved the quality of synthetic speech by making it possible to concatenate speech from a large database to produce intelligible synthesis while preserving much of...
Provided by AT&T Intellectual Property
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White Papers
XTreeNet: Scalable Overlay Networks for XML Content Dissemination and Querying (Synopsis)
January 1, 2009, 12:00am PST
XML is becoming a ubiquitous format for information exchange on the Internet. To alleviate the problems of "Whom to ask" and "Whom to tell" when connecting XML information producers with consumers...
Provided by AT&T Intellectual Property
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White Papers
Design and Implementation of a Routing Control Platform
January 1, 2009, 12:00am PST
The routers in an Autonomous System (AS) must distribute the information they learn about how to reach external destinations. Unfortunately, today's internal Border Gateway Protocol (iBGP)...
Provided by AT&T Intellectual Property
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White Papers
Trajectory Sampling for Direct Traffic Observation
January 1, 2009, 12:00am PST
Traffic measurement is a critical component for the control and engineering of communication networks. They argue that traffic measurement should make it possible to obtain the spatial flow of...
Provided by AT&T Intellectual Property
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White Papers
Improving Preselection in Unit Selection Synthesis
January 1, 2009, 12:00am PST
Unit selection synthesis is a method of selecting and concatenating speech segments from a large single-speaker audio database to synthesize utterances. Selection is based on assigning target and...
Provided by AT&T Intellectual Property
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White Papers
Pronunciation Lexicon Adaptation for TTS Voice Building
January 1, 2009, 12:00am PST
This paper describes reducing phone label errors in TTS voice building by means of modeling of speaker pronunciation variants. Each speaker has his or her own unique pronunciations (and...
Provided by AT&T Intellectual Property
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White Papers
Charging From Sampled Network Usage
January 1, 2009, 12:00am PST
IP flows have heavy-tailed packet and byte size distributions. This make them poor candidates for uniform sampling-i.e. selecting 1 in N Flows-since omission or inclusion of a large flow can have...
Provided by AT&T Intellectual Property
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White Papers
The Best of Both Worlds: Unifying Conventional Dialog Systems and POMDPs
June 20, 2008, 12:00am PDT
Partially Observable Markov Decision Processes (POMDPs) and conventional design practices offer two very different but complementary approaches to building spoken dialog systems. Whereas...
Provided by AT&T Intellectual Property
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White Papers
Fast Indexes and Algorithms for Set Similarity Selection Queries
November 27, 2007, 12:00am PST
Data collections often have inconsistencies that arise due to a variety of reasons, and it is desirable to be able to identify and resolve them efficiently. Set similarity queries are commonly...
Provided by AT&T Intellectual Property
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White Papers
Rule-Based Anomaly Detection on IP Flows
January 20, 2009, 12:00am PST
Rule-based packet classification is a powerful method for identifying traffic anomalies, with network security as a key application area. While popular systems like Snort are used in many network...
Provided by AT&T Intellectual Property
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White Papers
CPM: Adaptive Video-on-Demand With Cooperative Peer Assists and Multicast
August 29, 2008, 12:00am PDT
This paper presents CPM, a unified approach that exploits server multicast, assisted by peer downloads, to provide efficient Video-on-Demand (VoD) in a service provider environment. They describe...
Provided by AT&T Intellectual Property
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White Papers
OSPF Monitoring: Architecture, Design and Deployment Experience
January 1, 2009, 12:00am PST
Improving IP control plane (routing) robustness is critical to the creation of reliable and stable IP services. Yet very few tools exist for effective IP route monitoring and management. This...
Provided by AT&T Intellectual Property
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White Papers
GMM/SVM N-Best Speaker Identification Under Mismatch Channel Conditions
January 17, 2008, 12:00am PST
Under severe channel mismatch conditions, such as training with far-field speech and testing with telephone data, performance of Speaker Identification (SID) degrades significantly, often below...
Provided by AT&T Intellectual Property
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White Papers
Interleaver Design for Short Block Length Turbo Codes
January 1, 2009, 12:00am PST
The performance of a Turbo code depends on the interleaver design. There are two major criteria that can be considered in the design of an interleaver. Distance spectrum properties of the code and...
Provided by AT&T Intellectual Property
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White Papers
Mining Customer Care Dialogs for "Daily News"
January 1, 2009, 12:00am PST
As large-scale deployments of spoken dialog systems in call centers become more common, a wealth of information is gathered about the call center business as well as the operation of these systems...
Provided by AT&T Intellectual Property
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White Papers
DjVu: Analyzing and Compressing Scanned Documents for Internet Distribution
January 1, 2009, 12:00am PST
DjVu is an image compression technique specifically geared towards the compression of scanned documents in color at high resolution. Typical magazine pages in color scanned at 300dpi are...
Provided by AT&T Intellectual Property
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White Papers
Demonstration of a POMDP Voice Dialer
April 14, 2008, 12:00am PDT
This paper is a demonstration of a voice dialer, implemented as a Partially Observable Markov Decision Process (POMDP). A real-time graphical display shows the POMDP's probability distribution...
Provided by AT&T Intellectual Property
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White Papers
Speech-Plans: Generating Evaluative Responses in Spoken Dialogue
January 1, 2009, 12:00am PST
Recent paper on evaluation of spoken dialogue systems indicates that better algorithms are needed for the presentation of complex information in speech. Current dialogue systems often rely on...
Provided by AT&T Intellectual Property
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White Papers
Avoiding Instability During Graceful Shutdown of Multiple OSPF Routers
January 1, 2009, 12:00am PST
Many recent router architectures decouple the routing engine from the forwarding engine, allowing packet forwarding to continue even when the routing process is not active. This opens up the...
Provided by AT&T Intellectual Property
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White Papers
Efficient Table Anonymization for Aggregate Query Answering
January 1, 2009, 12:00am PST
Privacy protection is a major concern when microdata need to be released for ad hoc analyses. This has led to a lot of recent research in privacy goals and table anonymization schemes, such as...
Provided by AT&T Intellectual Property
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White Papers
Design, Implementation and Operation of a Large Enterprise Content Distribution Network
January 1, 2009, 12:00am PST
Content Distribution Networks (CDNs) are becoming an important resource in enterprise networks. They are being used in applications ranging from broadcasted townhall-style meetings to the...
Provided by AT&T Intellectual Property
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White Papers
Directed Graphs and Rectangular Layouts (Extended Abstract)
January 1, 2009, 12:00am PST
This paper deals with the problem, arising in practice, of drawing a directed graph as a collection of disjoint, isothetic rectangles, where the rectangles of the nodes of each edge must touch and...
Provided by AT&T Intellectual Property
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White Papers
Importance Sampling Via Load-Balanced Facility Location
February 20, 2008, 12:00am PST
This paper considers the problem of "Importance sampling" from a high dynamic range image, motivated by a computer graphics problem called image-based lighting. Image-based lighting is a method to...
Provided by AT&T Intellectual Property
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White Papers
Dialog Speech Acts and Prosody: Considerations for TTS
January 1, 2009, 12:00am PST
As natural language dialog systems involving both speech recognition and Text-To-Speech (TTS) synthesis become more sophisticated, the limitations of general-purpose TTS for human-computer dialogs...
Provided by AT&T Intellectual Property
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White Papers
Improving Preselection in Unit Selection Synthesis
January 1, 2009, 12:00am PST
Unit selection synthesis is a method of selecting and concatenating speech segments from a large single-speaker audio database to synthesize utterances. Selection is based on assigning target and...
Provided by AT&T Intellectual Property
-
White Papers
Trajectory Sampling for Direct Traffic Observation
January 1, 2009, 12:00am PST
Traffic measurement is a critical component for the control and engineering of communication networks. They argue that traffic measurement should make it possible to obtain the spatial flow of...
Provided by AT&T Intellectual Property
-
White Papers
Design and Implementation of a Routing Control Platform
January 1, 2009, 12:00am PST
The routers in an Autonomous System (AS) must distribute the information they learn about how to reach external destinations. Unfortunately, today's internal Border Gateway Protocol (iBGP)...
Provided by AT&T Intellectual Property
-
White Papers
XTreeNet: Scalable Overlay Networks for XML Content Dissemination and Querying (Synopsis)
January 1, 2009, 12:00am PST
XML is becoming a ubiquitous format for information exchange on the Internet. To alleviate the problems of "Whom to ask" and "Whom to tell" when connecting XML information producers with consumers...
Provided by AT&T Intellectual Property
-
White Papers
Perceptually-Based Data-Driven Join Costs: Comparing Join Types
January 1, 2009, 12:00am PST
Unit selection synthesis has improved the quality of synthetic speech by making it possible to concatenate speech from a large database to produce intelligible synthesis while preserving much of...
Provided by AT&T Intellectual Property
-
White Papers
Key Differences Between Web1.0 and Web2.0
February 13, 2008, 12:00am PST
Web 2.0 is a buzzword introduced in 2003/04 which is commonly used to encompass various novel phenomena on the World Wide Web. Although largely a marketing term, some of the key attributes...
Provided by AT&T Intellectual Property
-
White Papers
Multicast Topology Inference From Measured End-to-End Loss
January 1, 2009, 12:00am PST
The use of multicast inference on end-to-end measurement has recently been proposed as a means to infer network internal characteristics such as packet link loss rate and delay. This paper...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Mobile Strategies and Direction
November 12, 2007, 12:00am PST
When it comes to handling mobility issues, moving from strategy to execution means defining the optimization plans and quantifying the results. The presenters give insights into the best practices...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: How Green Is Your IT?
September 26, 2008, 12:00am PDT
"Green IT" combines two different goals: cutting costs by reducing energy consumption and reducing an organization's carbon footprint for policy reasons beyond saving money. According to presenter...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: IT As A Service
October 23, 2008, 12:00am PDT
The presenters of this webcast discuss the pros and cons of consuming IT resources and network bandwidth as an on-demand service. Benefits include a scalable infrastructure, usage-based pricing...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Web 2.0 for Your Business
March 25, 2008, 12:00am PDT
Due to a growing interest to improve collaboration, increase agility and save money, businesses are adopting Web 2.0 tools like wikis, blogs and document tagging. These components are part of an...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Comparing WAN Technology Choices
January 1, 2009, 12:00am PST
As new applications are added to network, how to choose the right networking solution? Frame Relay, ATM, Ethernet, MPLS, IP VPNs, VPLS, Private Line, SONET and DWDM can all be used effectively to...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: When Is VPLS the Right Choice?
June 16, 2008, 12:00am PDT
Networking is constantly evolving, bringing new and demanding applications for today's enterprises to manage. Making WAN choices that will meet these needs is becoming increasingly difficult. VPLS...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Lowering the TCO for Business Applications
March 25, 2009, 12:00am PDT
Critical business applications require continuous care and investment. Now, more than ever, enterprises must ensure their applications scale to their changing business needs, without incurring...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: MPLS in 2009: Where to From Here?
February 25, 2009, 12:00am PST
With nearly 75% of all enterprises deploying MPLS for site-to-site connectivity, the question becomes "Now what?" The attendee will learn how to make the most of the MPLS network as the presenter...
Provided by AT&T Intellectual Property
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Webcasts
On-Demand Webcast: Speeding Adoption of Enterprise 2.0
March 18, 2009, 12:00am PDT
The presenters discuss how Social Networking can be used effectively in a corporate environment for knowledge management, integration, business development and brand consolidation. The speed of...
Provided by AT&T Intellectual Property
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White Papers
Adaptive Processing of Top-k Queries in XML
January 1, 2008, 12:00am PST
The ability to compute top-k matches to XML queries is gaining importance due to the increasing number of large XML repositories. The efficiency of top-k query evaluation relies on using scores to...
Provided by AT&T Labs-Research
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White Papers
Analyzing the Spatial Quality of Internet Streaming Video
January 1, 2008, 12:00am PST
The quality of video over the Internet is determined both by the original encoded video quality and by any impairments caused by the network. This paper considers the first of these factors. The...
Provided by AT&T Labs-Research
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White Papers
Fighting Spam by Encapsulating Policy in Email Addresses
January 1, 2008, 12:00am PST
Everyday network interactions require users to give out their email address, yet no guarantees can be made about how this address will be used. Sometimes the address is given to a human (e.g., on...
Provided by AT&T Labs-Research
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White Papers
Efficient Packet Monitoring for Network Management
November 7, 2007, 12:00am PST
Network monitoring is a vital part of modern network infrastructure management. Existing techniques either present a restricted view of network behavior and state, or do not efficiently scale to...
Provided by AT&T Labs-Research
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Case Studies
U.S. Olympic Training Centers: High-Speed Networking Aids the Quest for Gold
October 30, 2007, 12:00am PDT
The Olympic Training Centers need to create a rich development environment for the athletes training in hopes of making the U.S. Olympic Team or U.S. Paralympic Team, offering all the resources,...
Provided by AT&T Intellectual Property
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White Papers
Traffic Engineering With Traditional IP Routing Protocols
January 1, 2008, 12:00am PST
Traffic engineering involves adapting the routing of traffic to the network conditions, with the joint goals of good user performance and efficient use of network resources. This paper describe an...
Provided by AT&T Labs-Research
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White Papers
Addressing Heterogeneity, Scalability, and Privacy in Layered Multicast Congestion Control
May 15, 2008, 12:00am PDT
Multicast is attracting a resurgence of interest because it has a potential to address the explosively growing need for efficient streaming of large-volume Internet content. However, to realize...
Provided by AT&T Labs-Research
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White Papers
Streams, Security and Scalability
January 1, 2008, 12:00am PST
Network-based attacks, such as DDoS attacks and worms, are threatening the continued utility of the Internet. As the variety and the sophistication of attacks grow, early detection of potential...
Provided by AT&T Labs-Research
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White Papers
Network Monitoring for Video Quality Over IP
December 1, 2007, 12:00am PST
This paper considers the problem of predicting application-level video quality based on monitoring video packets within the network. The goal is to detect impairments (either server- or...
Provided by AT&T Intellectual Property
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