论文标题
基于速率自适应通道代码的360度图像的交互式压缩中的精细粒度访问
Fine granularity access in interactive compression of 360-degree images based on rate-adaptive channel codes
论文作者
论文摘要
在本文中，我们为全向图像提出了一种新的交互式压缩方案。这需要两个特征：有效的数据压缩，以降低存储成本以及提取用户要求的压缩流的一部分压缩流的能力（用于降低传输速率）。为了有效的压缩，需要通过已预先定义和压缩的一系列参考文献来预测数据。这与随机可访问性的精神形成鲜明对比。我们根据速率自适应通道代码实现的增量代码提出了解决此问题的解决方案。该方案在适应任何用户请求时编码图像，并导致有效的编码在解码器上的可用信息方面灵活地提取数据。因此，在用户的请求期间，只能传输在用户方面所需的信息，就好像该请求在编码器上已经知道。实验结果表明，我们的编码器以较小的成本存储成本比最先进的基于瓷砖的方法获得了更好的传输速率。此外，传输速率随请求的大小逐渐增长，并避免了楼梯效应，这显示了我们的编码器对交互式传输的完美适合性。
In this paper, we propose a new interactive compression scheme for omnidirectional images. This requires two characteristics: efficient compression of data, to lower the storage cost, and random access ability to extract part of the compressed stream requested by the user (for reducing the transmission rate). For efficient compression, data needs to be predicted by a series of references that have been pre-defined and compressed. This contrasts with the spirit of random accessibility. We propose a solution for this problem based on incremental codes implemented by rate-adaptive channel codes. This scheme encodes the image while adapting to any user request and leads to an efficient coding that is flexible in extracting data depending on the available information at the decoder. Therefore, only the information that is needed to be displayed at the user's side is transmitted during the user's request, as if the request was already known at the encoder. The experimental results demonstrate that our coder obtains a better transmission rate than the state-of-the-art tile-based methods at a small cost in storage. Moreover, the transmission rate grows gradually with the size of the request and avoids a staircase effect, which shows the perfect suitability of our coder for interactive transmission.
