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- W56948517 abstract "In two-way video conferencing applications, video packets transmitted through various networks can suffer from loss. It is well known that forward error correction (FEC) code is an effective weapon in combating packet loss. However designing a FEC code that has strong recovery capability while satisfying real life requirements such as low complexity and low delay poses an intriguing challenge. In this project, the first objective that we achieved is the design of a practical multi-rate packet loss recovery FEC code which has linear encoding and decoding complexity, low end to end delay and is backward compatible with systems that do not support this particular FEC coding scheme. A transport protocol was also proposed which is compatible with existing RTP protocol for transmitting H.264 coded video frames. In our applications, appropriate FEC code rate can be assigned assuming that the effect of packet loss on the decoder video quality can be predicted before actual decoding occurs. Consequently, the second component of the project is the design and implementation of a real time end to end distortion estimator(EEDE) for H.264 codec, which runs on the encoder side and is capable of estimating decoder side distortions introduced by packet loss. With these tools at our disposal, an optimization process is then performed with the objective of minimizing the decoder side visual distortion while satisfying user defined FEC code rate. The end product of this project is a complete real time embedded video conferencing system with FEC encoding and decoding capability running H.264 codec at resolution up to WVGA resolution (800 × 480), 30 frames per second (fps) and 2 megabits per second (Mbps)." @default.
- W56948517 created "2016-06-24" @default.
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- W56948517 date "2010-12-10" @default.
- W56948517 modified "2023-09-27" @default.
- W56948517 title "PACKET LOSS PROTECTION FOR H.264-BASED VIDEO CONFERENCING" @default.
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