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Joint Source and Channel Coding for Real Time H.264 Coded Video Transmission Using Mobile Hand-held Devices

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Author(s): Azni Mohamed | Pyndiah Ramesh | Mokrani Karim | Guilloud Frederic

Journal: IETE Journal of Research
ISSN 0377-2063

Volume: 55;
Issue: 4;
Start page: 154;
Date: 2009;
Original page

Keywords: H.264/AVC | Network abstraction layer unit | Unequal error protection | Forward error correction | Error concealment | Robust video -transmission.

ABSTRACT
This paper proposes a joint source channel coding scheme for robust real time transmission of H.264/AVC -coded -video over noisy channels and under bandwidth limitations. A new method of rate adaptation to the -allowed -maximum channel transmission rate which does not assume source rate control in the source coder has been -proposed. This keeps system complexity reasonable and improves the perceived decoded video quality. These are desirable features for two-way video-conferencing using mobile hand-held devices. Data partitioning is used to code the source data. Then, unequal error protection is applied at the network abstraction layer. For robustness, we use joint -optimization of forward error correction at the transmitter and error concealment at the source decoder. A low complexity and -efficient algorithm of channel code rate allocation to the network abstraction layer units is then developed. -Simulation results show that the perceived decoded video quality is improved for small levels of signal-to-noise ratio.
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