Adaptive Non-Uniform Quantization of Depth Data in Free-Viewpoint Television System

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Adaptive Non-Uniform Quantization of Depth Data in Free-Viewpoint Television System

更新时间：2025-07-09

- Adaptive Non-Uniform Quantization of Depth Data in Free-Viewpoint Television System
- Vol. 44, Issue 2, Pages: 82-87(2010)
- 作者机构：
  
  西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.8
- Online First：10 February 2010，
  
  Published：2010
- 稿件说明：
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Adaptive Non-Uniform Quantization of Depth Data in Free-Viewpoint Television System[J]. 2010, 44(2): 82-87.
DOI：

Adaptive Non-Uniform Quantization of Depth Data in Free-Viewpoint Television System[J]. 2010, 44(2): 82-87. DOI：

摘要

为了降低现有任意视点电视系统中深度数据量化所带来的量化失真

提出一种自适应非均匀深度量化方法.首先根据深度数据的统计特性

选取有效深度子空间; 然后对有效深度子空间重新进行精细划分

得到对应的自适应量化表; 最后使用该自适应量化表对原深度数据进行自适应量化.实验结果表明

与现有的均匀量化和普通非均匀量化方法相比

使用所提出的方法可使深度数据的量化信噪比平均提高20 dB.因此

自适应非均匀量化方法能够显著降低深度数据量化误差

有助于在任意视点电视系统的接收端获得高精度深度数据

从而得到主观效果更好的虚拟视图.

Abstract

An adaptive non-uniform quantization method is proposed to reduce the distortion due to the depth data quantization in free-viewpoint television(FTV)system using the ordinary non-uniform quantization method. The proposed method determines the valid depth sub-spaces according to the statistical distribution characteristics of the depth data. Then

these depth sub-spaces are finely divided to form an adaptive quantization look-table. Finally

the original depth data are adaptively quantized using the quantization look-table. Experimental results and comparisons with the ordinary non-uniform depth data quantization method show that the proposed method improves the quantization signal-to-noise ratio of the depth data by an average of 20 dB. Thus the adaptive non-uniform quantization method can significantly reduce the quantization distortion of the depth data

and benefits the high-accurate reconstruction of the depth data and the better subject visual effect of the synthesized image at the receiver of the FTV system.

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references

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