原盘画质较好,除了线条附近有些烂噪点。所以我们针对性地使用了保护性极好的降噪算法,先分离噪点,以避免残留噪点对其他处理产生干扰。针对极少数的色带,我们采用了轻微了去色带处理,配合自适应降噪和锐化补偿了整体锐度损失。由于本片线条部分十分锐利,颜色也比较鲜艳,我们适当提高了码率参数进行编码。
The quality of the original source is good, except some DCT noises can be found around lines. We used highly protective de-noising algorithms to separate the noises first, which is to avoid interference with other processes. As for occasional colour-bandings, we applied mild de-banding along with adaptive de-noising and sharpening to compensate overall sharpness. Considering that this series has very sharp lines and vivid image colours, we moderately increased bitrate when encoding.