PSNR

例句：

1. 1. The image quality is significantly better than the previous model.
   这款图像质量明显优于前款。
2. 2. The video quality is excellent, with a peak signal-to-noise ratio of 40dB.
   视频质量极佳，峰值信噪比为40dB。
3. 3. The PSNR value of this algorithm is 50.68 dB, which is very close to the theoretical maximum value.
   该算法的PSNR值为50.68 dB，非常接近理论最大值。