HDDVD Rip DD+ Compatibility Issues

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Krobar
Posts: 110
Joined: Tue Feb 16, 2010 8:45 am

HDDVD Rip DD+ Compatibility Issues

Post by Krobar » Sat Feb 01, 2020 2:44 pm

Has anyone else experienced issues with DD+ bit-streaming of HDDVD MKVs with DD+ having problems? A Denon and a Marantz I tried will play them but three other brands wont. All of the receivers play DD+ ripped from Bluray correctly and can also play Stereo DD+ tacks from HDDVD but 5.1 DD+ tracks from HDDVD wont play.

Krobar
Posts: 110
Joined: Tue Feb 16, 2010 8:45 am

Re: HDDVD Rip DD+ Compatibility Issues

Post by Krobar » Sat Feb 01, 2020 7:36 pm

It seems the issue with the HDDVD files produced by MakeMKV is they are using an unusually high audio frame rate. At this point I don't know if this is outside of Dolby spec or not. One Receiver I tried could play the 62.5FPS stream but not the 187.5FPS stream.

Here are my results:
HDDVD:
Liar Liar - 5.1 - 1536Kbit - 187.5FPS (256 SPF) - Fails
Liar Liar - 2.0 - 192Kbit - 31.25FPS (1536 SPF) - OK
Lethal Weapon 2 - 5.1 - 640Kbit - 62.5 FPS (768 SPF) - Fails
Led Zeppelin - Song Remains The Same - 192Kbit- 2.0 - 31.25FPS (1536 SPF) - OK
Yes- Live At Montreux - 5.1 - 768Kbit - 62.5 FPS (768 SPF) - Fails

Bluray:
Inside Out (French) - 7.1 - 896Kbit - 31.25FPS (1536 SPF) - OK
Secret Life Of Pets (Spanish) - 7.1 - 768Kbit - 31.25FPS (1536 SPF) - OK
BlacKkKlansman (French) - 7.1 - 768Kbit - 31.25FPS (1536 SPF) - OK
Finding Dory (French) - 7.1 - 896Kbit - 31.25FPS (1536 SPF) - OK
Dolby Safari Demo - 7.1 - 1664Kbit - 31.25FPS (1536 SPF) - OK
Dolby Leaf Demo - 5.1 + Atmos - 448Kbit - 31.25FPS (1536 SPF) - OK

Krobar
Posts: 110
Joined: Tue Feb 16, 2010 8:45 am

Re: HDDVD Rip DD+ Compatibility Issues

Post by Krobar » Sun Feb 02, 2020 10:38 am

"A DD+ stream is a collection of fixed-length syncframe packets, each of which corresponds to either 256, 512, 768, or 1536 consecutive time-domain audio samples. (The 1536-sample case is the most common case, and corresponds to Dolby Digital; the shorter subframe lengths are intended for use in interactive applications like video games where reducing encoder latency is an important concern)."

It seems 1536 is always used by Bluray but HDDVD varies. In short MakeMKV is correct and I think Kodi is probably handling it OK too. If you are suffering problems playing back HDDVD 5.1 DD+ tracks in bitstream shout at your AVR manufacturer as they are not fully supporting the DD+ standard.

paulster
Posts: 200
Joined: Sat Aug 20, 2011 6:54 pm

Re: HDDVD Rip DD+ Compatibility Issues

Post by paulster » Wed Feb 05, 2020 10:40 pm

I haven't had to deal with this in forever as I ended up converting my DD+ tracks on HD-DVD to FLAC for compatibility purposes because of this exact same issue, but I do remember it was one studio in particular whose discs all had the same issue on a bunch of AVRs.

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