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Udo, E. U.
Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria
Okpeki, U. K.
Department of Electrical/ Electronic Engineering, Faculty of Engineering, Delta State University, abraka, Oleh Campus
Ezejiofor, E.
Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria
ABSTRACT
This paper focuses on the Error Control and
Concealment for Mobile Video Transmission. The transmission of high quality
real time interactive video over lossy networks as a result of data loss in the
network causes video quality to degrade. The issue of error control and
concealment in video transmission has become a very important aspect in video
delivery over unreliable networks such as internet and wireless networks.
Reference Picture Selection technique has been effective in controlling of
error during video transmission based on the role of the encoder and decoder.
The Reference Picture Selection which operates in both positive acknowledgement
(RPSACK) and negative acknowledgment (RPSNACK) make the encoder to select one
of several previous frames as a reference frame for predictive encoding of
subsequent frames. The Batch Video Quality Metric tool was used to determine
the impact of the Reference Picture Selection technique. High quality videos
with a wide variety of scene complexity and motion vector magnitude were
selected and encoded. The results obtained shows that under high packet loss
and high round trip time, the quality of video degrades for RPS NACK but
improves at a lower round trip time and at a lower packet loss. With RPS ACK,
the video quality improves when the round trip time and packet loss was low but
degrades when both packet loss and round trip time was high. When the results
were compared, it was discovered that when the loss rate was less than 1.482
the RPS NACK performs better than RPS ACK but when the loss rate was higher
than 1.482, RPS ACK performs better than RPS NACK for 60ms and 240ms round trip
times.
Keywords: Video quality, error control and concealment, Wireless Network, Encoder and Decoder, Reference Picture Selection
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Published
Thursday, December 27, 2018
Issue
Vol. 4 No. 2, DEC 2018
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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