DVD @ max BD bitrate = ???

[SDK]

Hi Guys,

Wondering if someone has transferred PC-generated or even filmed feature to BD using maximum BD bitrate but standard for DVD resolution. Is the resulting BD transfer totally artifact-free? How well does it look when upscaled to 1080?

Anyone yet?

Thanks!

[Don Blish]

Don't hold your breath for this. Without access to material directly from a broadcast NTSC camera, regular mortals have no way to get any standard def signal much over about 10mbps. Even direct from (lightly compressed) .avi files, bitrate is not much over that.

[phloyd]

DV is compressed at around 5:1 with video around 25 Mbps.

[SDK]

Here what I have done:

1) 720x576 animation: 3 x Blu-ray texts with size of 1/3 each; color transformation effect is applied to all 3 texts; static background of soccer crowd

2) Rendering to UNCOMPRESSED avi @ 30Mbps (= let's call it master)

3) Encoding master with MPEG2 at two different constant bitrates: 7Mbps (~DVD) and 25Mbps (~HD)

4) Bitmap snapshots are taken from master, DVD and HD

5) Cut & JPEG (100% quality conversion) are applied to bitmaps to speedup uploading times

Result is that DVD @ BD bitrate is artifact-free to me when dealing with PC-generated animation. Any pitfalls?

[SDK]

1) 1920x1080 animation: fade-in FX to test shadow delineation, rainbow and other sensitive drawings

2) Rendering 1920x1080 to UNCOMPRESSED avi (master)

3) Encoding master with MPEG2 at 720x576 with two different constant bitrates: 6Mbps (~DVD) and 25Mbps (~HD)

4) Encoding master with MPEG2 at 1920x1080 with 25Mbps (~HD1080)

5) Bitmap snapshots are taken from master, DVD, HD and HD1080

6) Cut & JPEG (100% quality conversion) are applied to bitmaps to speedup uploading times (BMP snapshots of 1920x1080 master and transfer are resized to 720x576 BMP and only then JPEG'ed)

Result is that DVD @ BD bitrate is artifact-free to me when transfering the 1920x1080 PC-based animation without front overlays. However such DVD lacks details, in this case deep colors (compare shots).
1920x1080 transfer gives more details and artifact-free to me when dealing with the same master.

[SDK]

1) 1920x1080 animation: filmFX applied to simulate telecine

2) Rendering 1920x1080 to UNCOMPRESSED avi (master)

3) Encoding master with MPEG2 at 720x576 with two different constant bitrates: 6Mbps (~DVD) and 25Mbps (~HD)

4) Encoding master with MPEG2 at 1920x1080 with 25Mbps (~HD1080)

5) Bitmap snapshots are taken from master, DVD, HD and HD1080

6) Cut & JPEG (100% quality conversion) are applied to bitmaps to speedup uploading times (BMP snapshots of 1920x1080 master and transfer are resized to 720x576 BMP and only then JPEG'ed)

Result is that DVD @ BD bitrate is artifact-free to me. While 1920x1080 transfer is having noticeable artifacts.

The reason I guess is that the 1920x1080 transfer utilizes almost the same bitrate as if it were the regular DVD. Here, the difference in resolutions between 1920x1080 VS 720x576 is ~4 times, the difference in bitrates 25Mbps VS 6Mbps is almost the same ~4 times, or in other words there is almost no increase in bitrate for 1920x1080, the bitrate corresponds to the resolution as in regular DVD