Feedback-free Wavelet Based Distributed Coding for Video

Abstract

Distributed video coding can effectively reduce the complexity in encoder, so it adapt to the capacity-constrained scenarios, such as the wireless video sensor network. But in wireless networks, the transmission rate's instability caused by the fluctuant bandwidth will influence the video reconstructed quality. This paper proposes a wavelet domain distributed coder for video which allows for scalability and does not need feedback channel. At the encoder, a simplified integer wavelet transform algorithm is adopted to improve the computational efficiency. Then according to the channel condition, either the low-frequency coefficients or the low frequency plus several high frequency coefficients are selected. At the decoder, the video sequence is reconstructed by the received coding rate and the generated side information. The simulation results show that the proposed scheme can reduce the transmission bit rate with a good video transmission quality.

Keywords

• Distributed video coding
• Wavelet transforms; Video coding.
• Wavelet transforms
• Video coding.