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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Error-resilient image and video transmission over the Internet using unequal error protection
Joohee Kim1, Russell M Mersereau, Yucel Altunbasak
1Center for Signal and Image Process., Georgia Inst. of Technol., Atlanta, GA 30332-0250, USA. joohee@ece.gatech.edu
Summary
This study introduces a novel unequal error protection algorithm for progressive bitstreams, enhancing video quality over lossy networks. The method improves robustness against packet loss by selectively applying forward error correction (FEC) to bit-planes.
Area of Science:
- Digital image processing
- Video compression
- Network communication
Background:
- Progressive bitstreams are susceptible to packet loss in lossy networks.
- Existing error protection methods may require significant side information or lack adaptability.
- Efficient transmission of compressed video data over the internet necessitates robust error resilience.
Purpose of the Study:
- To develop a bit-plane-wise unequal error protection (UEP) algorithm for progressive bitstreams.
- To enhance the robustness and picture quality of video transmitted over lossy networks.
- To reduce the overhead associated with error correction in compressed video data.
Main Methods:
- A novel bit-plane-wise unequal error protection (UEP) algorithm is proposed.
- Forward error correction (FEC) is adaptively assigned to each bit-plane of a 3-D Set Partitioning In Hierarchical Trees (SPIHT) compressed bitstream.
- The algorithm is extended to multiple-substream UEP for improved performance at high packet loss rates.
- Application to JPEG 2000 coded image transmission over the Internet is demonstrated.
Main Results:
- The proposed UEP algorithm provides graceful degradation of picture quality with increasing packet losses.
- Reduced side information is required at the decoder due to limiting quality levels to the number of bit-planes.
- The algorithm demonstrates simplicity, speed, and robustness in adverse network conditions.
- Extended multiple-substream UEP enhances error resilience at high packet loss rates.
Conclusions:
- The developed bit-plane-wise UEP algorithm is effective for transmitting progressive bitstreams over lossy networks.
- The method offers a practical solution for maintaining reasonable picture quality in video applications under varying network conditions.
- The algorithm's efficiency and robustness make it suitable for real-world internet transmission scenarios.
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