3D wavelet video codec and its rate control in ATM network
Gang Lin, Zemin Liu · 2003
This paper presents a new video coding system based on the wavelet transform and its rate control scheme over ATM networks. First, the three dimensional (3D) wavelet transform is performed on the original image sequence, and an extension of set partitioning in hierarchical trees (SPIHT) algorithm is employed to quantize the wavelet coefficients. Then, the output rate of the coder is controlled at group of frame (GOF) scale, ensuring that it conforms to the parameters of a leaky bucket controller. Several leaky buckets with different sizes are discussed too. Our simulation shows the efficiency of this codec and the effectiveness of the proposed rate control scheme.