arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.14267eess.IVcs.CVcs.LGcs.MM
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视频压缩中神经网络滤波器的有效自适应

Efficient Adaptation of Neural Network Filter for Video Compression

Nokia Technologies(诺基亚技术)

Yat-Hong Lam, Alireza Zare, Francesco Cricri, Jani Lainema, Miska Hannuksela

摘要:

我们提出了一种有效的微调方法,神经网络滤波器,适用于后处理伪影去除步骤中的视频编码管道。在编码器侧执行微调,以使神经网络适应正在编码的特定内容。为了最大化PSNR增益并最小化比特率开销,我们建议仅微调卷积层的偏差。所提出的方法实现收敛速度比传统的微调方法,使其适合于实际应用。权重更新可以被包括在由现有视频编解码器生成的视频比特流中。我们表明,我们的方法实现了高达9.7%的平均BD速率增益相比,国家的最先进的通用视频编码(VVC)标准编解码器的7个测试序列。

英文摘要:

We present an efficient finetuning methodology for neural-network filters which are applied as a postprocessing artifact-removal step in video coding pipelines. The fine-tuning is performed at encoder side to adapt the neural network to the specific content that is being encoded. In order to maximize the PSNR gain and minimize the bitrate overhead, we propose to finetune only the convolutional layers' biases. The proposed method achieves convergence much faster than conventional finetuning approaches, making it suitable for practical applications. The weight-update can be included into the video bitstream generated by the existing video codecs. We show that our method achieves up to 9.7% average BD-rate gain when compared to the state-of-art Versatile Video Coding (VVC) standard codec on 7 test sequences.

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。

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