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Vol. 153, No. 6, June 2013, pp. 192-199

 

Bullet

 

Feedback-free Wavelet Based Distributed Coding for Video
 
1 Chen Rui, 2 Wu Minghu, 1 Tong Ying

1 School of Communications Engineering, Nanjing Institute of Technology, Nanjing, China, 211167 China

2 School of Electrical and Electronic Engineering, Hubei University of Technology, Wu'han, 430068, China

1 Tel.: 88413677, fax: 88413677

1 E-mail: chenrui@njit.edu.cn

 

Received: 19 April 2013   /Accepted: 14 June 2013   /Published: 25 June 2013

Digital Sensors and Sensor Sysstems

 

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.

 

 

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