arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2102.04167eess.IV
收藏

视频纹理压缩统计与率失真曲线预测研究

Study of Compression Statistics and Prediction of Rate-Distortion Curves for Video Texture

Angeliki V. Katsenou, Mariana Afonso, David R. Bull

摘要:

编码纹理内容仍然是当前标准化视频编解码器的挑战。因此,了解视频纹理的时空特性和编码统计信息,以优化编码性能是有益的。在本文中,我们分析的时空特征和统计的视频纹理,探索不同的纹理类型的率质量性能和调查模型来数学描述他们。对于所有考虑的理论模型,我们采用机器学习回归来预测仅基于从未压缩内容中提取的选定时空特征的速率-质量曲线。所有实验均在均匀视频纹理上进行,以确保观察结果的有效性。回归结果表明,使用指数模型,我们可以更准确地预测预期的速率-质量曲线(在所考虑的数据集上,平均Bjøntegaard Delta速率为0.46%),同时保持较低的相对复杂性。这被期望被环路内过程采用以用于更快的编码决策,诸如速率失真优化、自适应量化、分割等。

英文摘要:

Encoding textural content remains a challenge for current standardised video codecs. It is therefore beneficial to understand video textures in terms of both their spatio-temporal characteristics and their encoding statistics in order to optimize encoding performance. In this paper, we analyse the spatio-temporal features and statistics of video textures, explore the rate-quality performance of different texture types and investigate models to mathematically describe them. For all considered theoretical models, we employ machine-learning regression to predict the rate-quality curves based solely on selected spatio-temporal features extracted from uncompressed content. All experiments were performed on homogeneous video textures to ensure validity of the observations. The results of the regression indicate that using an exponential model we can more accurately predict the expected rate-quality curve (with a mean Bjøntegaard Delta rate of 0.46% over the considered dataset) while maintaining a low relative complexity. This is expected to be adopted by in the loop processes for faster encoding decisions such as rate-distortion optimisation, adaptive quantization, partitioning, etc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑