Here is a second look at the flag test. If the flag is jagged, the 480i/480p conversion and upscaling is considered below average. As you can see here (even when you click for the larger view), the interior stripes of the flag appear are very smooth along the edges of the flag and within the stripes of the flag. This result indicates excellent deinterlacing (480i/480p conversion) and 1080p upscaling for the Yamaha RX-V3900, with regards to this test.
By proceeding to followng photo in this gallery you will see the results with regards to the differing position of the flag as it waves.