Re-quantization Two-Layer MPEG-I Coding Algorithm
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Abstract:
ABSTRACT: This paper addresses the issue of cell loss and its consequent effect on video quality. A two-layer coding system is proposed to maintain picture quality above a threshold while transmitting through a lossy channel. The system consists of a re-quantization two-layer coding at its encoder and a two-step recovery with slice-based error concealment at its decoder. The simulation performance of this system is evaluated and compared with a single layer system. It is shown that good resilience and efficiency improvement can be achieved by the proposed system. A multiplicative ARIMA model is proposed to represent and forecast the number of cells per frame for the encoded video traffic. The values obtained by this model and by an AR(1) model are compared with the actual values. The results show that the proposed model gives rise to higher goodness-of-fit.
Citations
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