| NSF Org: |
CCF Division of Computing and Communication Foundations |
| Recipient: |
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| Initial Amendment Date: | January 10, 2002 |
| Latest Amendment Date: | July 3, 2006 |
| Award Number: | 0133221 |
| Award Instrument: | Continuing Grant |
| Program Manager: |
John Cozzens
CCF Division of Computing and Communication Foundations CSE Directorate for Computer and Information Science and Engineering |
| Start Date: | August 15, 2002 |
| End Date: | July 31, 2007 (Estimated) |
| Total Intended Award Amount: | $347,820.00 |
| Total Awarded Amount to Date: | $347,820.00 |
| Funds Obligated to Date: |
FY 2004 = $75,560.00 FY 2005 = $88,017.00 FY 2006 = $91,688.00 |
| History of Investigator: |
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| Recipient Sponsored Research Office: |
926 DALNEY ST NW ATLANTA GA US 30318-6395 (404)894-4819 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
225 NORTH AVE NW ATLANTA GA US 30332-0002 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): | SIGNAL PROCESSING SYS PROGRAM |
| Primary Program Source: |
app-0104 app-0105 app-0106 |
| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.070 |
ABSTRACT
0133221
Altunbasak, Yucel
GA Tech Res Corp
As wireless networks become more pervasive, there is a great need for wireless multimedia with quality and reliability levels that are characteristic of wired networks. It is clear that wireless communications will include image, video and data applications. Furthermore, spectral limitations dictate that transmission
resources be used efficiently. To this end, image, video and other mixed media encoding algorithms need to be designed to overcome the types of channel errors that are likely to occur. Noting the wireless channel characteristics and the requirements of real-time video applications, the investigator offers solutions
that are novel in two aspects. First, the investigated methods are adaptive with respect to variations in bandwidth and channel error statistics. This flexibility should prove to be critical in heterogeneous wireless environments. Second, the error correction and concealment methods are not only technology advances by
themselves, but they also function together in innovative ways.
More specifically, the contributions of this research include: (1) a coordinated multiple description coding and error concealment procedure where the smoothness of the video signal helps to compensate for the loss of descriptions, (2) a multiple description coder that adapts to variations in data rate and packet loss statistics, (3) a new multi-frame boundary matching algorithm that utilizes the boundary smoothness property not only
in the decoded frame but also in the successive frames, thereby minimizing the error propagation, (4) a new multi-frame blocking artifact reduction algorithm that uses the spatial correlations that exist between the successive frames to define constraint sets at multiple frames and provides a projections onto convex
sets based solution, (5) a transport protocol that is specifically designed for real-time multimedia communications, and (6) a testbed to integrate all the aforementioned methods into a system-level wireless video streaming solution. On the educational front, the investigator plans to develop a comprehensive program in multimedia signal processing and communications. The investigator will make every attempt to meet
the original scope and level of effort of the project.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
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