Abstract:

This paper combines multiple description scalar quantization and SPIHT coding to get efficient multiple description image coding over wireless error-prone network. An extension over the two-description multiple description scalar quantization is applied, and SPIHT is employed to encode each description generated from the coarse quantization. Multiple description bit streams which can be transported independently can be obtained. The experimental results confirm that the method performs well especially over the wireless error-prone network. Using this method, it can achieve good error robustness during the transportation over the channels with serious loss rate and limited bandwidth.

Key words: image transportation, multiple description scalar quantization, SPIHT coding

摘要： 将多描述标量量化与SPIHT编码联合起来，得到无线差错网络环境下的高效多描述图像编码。对两描述的多描述标量量化进行多维索引扩展，并对由粗量化边索引所形成的多个描述进行SPIHT编码，得到多个可独立传输的多描述码流。实验结果表明，该方法适合于无线差错网络环境中的图像传输，能够在较大的信道差错率和严格的带宽限制下，获得较好的图像传输差错鲁棒性。

关键词: 图像传输, 多描述标量量化, SPIHT编码

CLC Number: 

• TN919.81