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UBC Theses and Dissertations
Error reduction and control algorithms for MPEG-2 video transport over IP networks Lam, Ernest
Abstract
MPEG-2 multimedia transmission over IP networks is becoming a viable solution for high quality multimedia delivery. The MPEG-2 coding algorithm is very sensitive to channel disturbances because a single bit error in the video bitstream can cause serious video quality degradation due to error propagation. For an IP network, packet loss is the major source of errors. According to the encapsulation of the MPEG-2 data, a packet loss can cause the loss of a whole picture. As a result, the impact of a single packet loss is much more serious than that of the traditional single bit error effect. In this project, an IP testbed is set up to study the packet loss effect on the MPEG-2 video stream. By analyzing this packet loss effect and the prioritized nature of the MPEG-2 data structure, several error reduction algorithms are proposed and implemented into this testbed. Firstly, the probability of losing packets and the importance of different types of MPEG-2 data are analyzed, and the error tolerance of different MPEG-2 data is derived. Given the results, three different duplication of picture header algorithms are proposed and implemented. Besides, two error concealment algorithms are also proposed: picture replacement and slice replacement. Both subjective (MOS) and objective (PSNR) measurements are taken and analyzed. Analysis of the pros and cons of the above algorithms leads to the introduction of a hybrid error reduction algorithm. This hybrid error reduction algorithm improves the video quality in an acceptable way by minimizing the picture hesitation, flickering, motion blurring and block artifacts caused by the IP packet loss.
Item Metadata
Title |
Error reduction and control algorithms for MPEG-2 video transport over IP networks
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2000
|
Description |
MPEG-2 multimedia transmission over IP networks is becoming a viable solution for
high quality multimedia delivery. The MPEG-2 coding algorithm is very sensitive to
channel disturbances because a single bit error in the video bitstream can cause serious
video quality degradation due to error propagation. For an IP network, packet loss is the
major source of errors. According to the encapsulation of the MPEG-2 data, a packet loss
can cause the loss of a whole picture. As a result, the impact of a single packet loss is
much more serious than that of the traditional single bit error effect. In this project, an IP
testbed is set up to study the packet loss effect on the MPEG-2 video stream. By
analyzing this packet loss effect and the prioritized nature of the MPEG-2 data structure,
several error reduction algorithms are proposed and implemented into this testbed.
Firstly, the probability of losing packets and the importance of different types of MPEG-2
data are analyzed, and the error tolerance of different MPEG-2 data is derived. Given the
results, three different duplication of picture header algorithms are proposed and
implemented. Besides, two error concealment algorithms are also proposed: picture
replacement and slice replacement. Both subjective (MOS) and objective (PSNR)
measurements are taken and analyzed. Analysis of the pros and cons of the above
algorithms leads to the introduction of a hybrid error reduction algorithm. This hybrid
error reduction algorithm improves the video quality in an acceptable way by minimizing
the picture hesitation, flickering, motion blurring and block artifacts caused by the IP
packet loss.
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Extent |
6258526 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-07-13
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0065029
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2000-11
|
Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.