Lee Ju Gyeong , Kang Jin Mi , Kim Chung Gil , Jeong Gi Dong

The KIPS Transactions:PartB , Vol. 10, No. 5, pp. 553-560, Aug. 2003
10.3745/KIPSTB.2003.10.5.553,   PDF Download:

Abstract

Since Wavelet Transform decomposes a video frame into subbands with various frequencies and resolutions, the reconstructed video quality at a receiver fluctuates according to the location of transmission errors within frames. This deteriorates the whole visual quality of the video. Specifically, for a wavelet based video which exploits the motion estimation prediction scheme, the transmission errors of a subband not only have a bad effect on other subbands within a same frame but also propagates to the subsequent frames. In this paper, we propose BDP(Block Based Dispersive Packetization) scheme, for a wavelet based video stream, which maintains constant video quality despite packet location that a transmission error occurs. To evaluate the performance of the proposed scheme, we use MRME(Multi-Resolution Motion Estimation) scheme to compress a video in Inter coding mode and Gilbert´s error model to generate the error patterns in wireless network environment. The simulation results show that BDP is more efficient than BP (Block based Packetization) or DP (Dispersive Packetization) in both PSNR and visual quality.

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