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Author Topic: Decoding audio Dolby TrueHD  (Read 33675 times)

airsoft

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Decoding audio Dolby TrueHD
« on: October 13, 2015, 05:46:40 PM »
Hi,

is there a problem to decode Dolby TrueHD in MKV container?
1) Need_For_Speed.mkv (DTS Master Audio, English, 7.1 channels, 24 bits, 48kHz) - it works -> LINEAR PCM [2/0]
2) Mission_Impossible_-_Ghost_Protocol.mkv (TrueHD, English, 7.1 channels, 48kHz) - it doesn't work - no audio
3) Catwoman.m2ts (TrueHD/AC3, English, 5.1 channels, 48kHz, dialnorm: -27dB) - it works -> LINEAR PCM [2/0]
4) John_Wick.m2ts (TrueHD/AC3 (Atmos), English, 7.1 channels, 48kHz) - it works -> LINEAR PCM [2/0]

As far as I know it is not possible to acheive 3/2.1 (6 channels) or 3/4.1 (8 channels) PCM, but what about at least a stereo?
It's a little mess in the settings about audio bitstream/decoding, but this is another discussion.

Regards
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codrynn

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Re: Decoding audio Dolby TrueHD
« Reply #1 on: October 13, 2015, 10:37:55 PM »
hello...in menu of recevier you must select out audio AMP....be careful  NOT AMP+TV
in meniu of Himedia hdmi raw 7.1
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #2 on: October 14, 2015, 06:20:42 AM »
Quote from: codrynn on October 13, 2015, 10:37:55 PM
hello...in menu of recevier you must select out audio AMP....be careful  NOT AMP+TV
in meniu of Himedia hdmi raw 7.1

I use always audio out = AMP, I known that if I choose AMP+TV both AMP and TV should maintain the required scheme.
And the option RAW7.1 bitstream HD Audio (i.e. Dolby TrueHD, DTS-HD Master Audio, while the option RAW5.1 bitstream standard audio (DTS 5.1, Dolby Digital 5.1).
I can't understand what is the relation of your advice? :)

Regards
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futeko.com

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Re: Decoding audio Dolby TrueHD
« Reply #3 on: October 14, 2015, 10:32:25 AM »
Quote from: airsoft on October 13, 2015, 05:46:40 PM
Hi,

is there a problem to decode Dolby TrueHD in MKV container?
1) Need_For_Speed.mkv (DTS Master Audio, English, 7.1 channels, 24 bits, 48kHz) - it works -> LINEAR PCM [2/0]
2) Mission_Impossible_-_Ghost_Protocol.mkv (TrueHD, English, 7.1 channels, 48kHz) - it doesn't work - no audio
3) Catwoman.m2ts (TrueHD/AC3, English, 5.1 channels, 48kHz, dialnorm: -27dB) - it works -> LINEAR PCM [2/0]
4) John_Wick.m2ts (TrueHD/AC3 (Atmos), English, 7.1 channels, 48kHz) - it works -> LINEAR PCM [2/0]

As far as I know it is not possible to acheive 3/2.1 (6 channels) or 3/4.1 (8 channels) PCM, but what about at least a stereo?
It's a little mess in the settings about audio bitstream/decoding, but this is another discussion.

Regards

I also find that True-HD will not decode to PCM stereo. I'll reply again tomorrow with a response from Himedia.
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #4 on: October 14, 2015, 10:46:30 AM »
Just for the record:
multichannel PCM is it not possible i.e. HiSillicon doesn't support it
or
it is a firmware restriction i.e. Himedia are decided ?

Regards
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futeko.com

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Re: Decoding audio Dolby TrueHD
« Reply #5 on: October 15, 2015, 10:50:10 AM »
Himedia are looking into the True-HD not decoding to 2 channel PCM problem.

I think it's surprised them that it doesn't work, maybe people haven't reported it before because a lot of rips will have both True-HD and AC3 audio tracks (in which case the AC3 would be decoded so no problem) and people with 7.1 audio rips are likely to want it passed as 7.1, not 2 channel PCM. I expect Himedia will fix it.



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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #6 on: October 15, 2015, 11:26:38 AM »
Hi,

I also remember it works on 1.0.8, but

1) what should be the settings for PCM output because I always see PCM 2/0 (stereo) on my receiver?

2) for the record - my previous player (Dune HD) was able to decode Dolby TrueHD only in m2ts container,
when it was MKV it only can bitstream it and after a lot of tests I've noticed that if movie is Bluray ISO
it also works in decode mode (somewhere in internet I've read that is license problem, not a hardware)
so I decided to test also on my Q5

Regards
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futeko.com

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Re: Decoding audio Dolby TrueHD
« Reply #7 on: October 15, 2015, 11:42:32 AM »
Himedia say that decode to 2 channel PCM is not supported for True-HD audio tracks. It is supported when there is also an AC3 track present. This is on a hardware level so is unlikely to be fixed/changed. I don't think 1.0.8 would be any different to other firmwares in this respect.

They also say that multi-channel LPCM is supported, but I'm not sure. I will test later and would appreciate any testing anyone reading this would like to do. Settings would be HDMI Output 'LPCM'. Whether or not the setting for HBR Ouput matters or not before it's greyed needs testing.
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #8 on: October 15, 2015, 11:52:05 AM »
Quote from: futeko.com on October 15, 2015, 11:42:32 AM
Himedia say that decode to 2 channel PCM is not supported for True-HD audio tracks. It is supported when there is also an AC3 track present. This is on a hardware level so is unlikely to be fixed/changed. I don't think 1.0.8 would be any different to other firmwares in this respect.

They also say that multi-channel LPCM is supported, but I'm not sure. I will test later and would appreciate any testing anyone reading this would like to do. Settings would be HDMI Output 'LPCM'. Whether or not the setting for HBR Ouput matters or not before it's greyed needs testing.

:) I was expecting multichannel PCM, not only 2 channels. Of course the ability of decoding multichannel or stereo PCM is welcomed.
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #9 on: October 16, 2015, 01:09:56 PM »
My test results

HDMI
HBR
Dolby TrueHD 7.1 - m2ts
Dolby TrueHD 7.1 - mkv
DTS-HD MA 7.1 - mkv
PCM 5.1 - mkv
PCM 7.1 - m2ts
Output
Output
codec (channels)
codec (channels)
codec (channels)
codec (channels)
codec (channels)
LPCM
Auto
PCM (2/0)
no audio
PCM (2/0)
PCM (2/0)
PCM (2/0)
LPCM
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
PCM (2/0)
PCM (2/0)
LPCM
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
PCM (3/2.1)
PCM (3/4.1)
RAW
Auto
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
RAW
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
not tested
not tested
RAW
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
Close
Auto
no audio
no audio
no audio
not tested
not tested
Close
RAW5.1
no audio
no audio
no audio
not tested
not tested
Close
RAW7.1
no audio
no audio
no audio
not tested
not tested
Auto
Auto
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
Auto
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
not tested
not tested
Auto
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested

It took me hour and half to test

P.S. I've tested 5 minutes ago and seems
1) or I've mistaken in previous tests
2) or software is fixed and PCM 5.1 in MKV works when HBR=RAW7.1 and HDMI=LPCM
« Last Edit: November 15, 2016, 05:37:53 PM by airsoft »
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #10 on: October 17, 2015, 06:35:04 PM »
Hi all,

I've returned to 1.0.8 and tested - same result container = MKV, audio = Dolby TrueHD, result = PCM decoding => no audio
i.e. same result as 3.0.1, so we wait Himedia answer and maybe fixed problem in next version.
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futeko.com

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Re: Decoding audio Dolby TrueHD
« Reply #11 on: October 19, 2015, 09:19:43 AM »
Thanks for the very comprehensive testing. Your results have been passed to Himedia.
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looun

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Re: Decoding audio Dolby TrueHD
« Reply #12 on: October 19, 2015, 02:10:13 PM »
Quote from: airsoft on October 16, 2015, 01:09:56 PM
My test results

HDMI
HBR
Dolby TrueHD 7.1 - m2ts
Dolby TrueHD 7.1 - mkv
DTS-HD MA 7.1 - mkv
PCM 5.1 - mkv
PCM 7.1 - m2ts
Output
Output
codec (channels)
codec (channels)
codec (channels)
codec (channels)
codec (channels)
LPCM
Auto
PCM (2/0)
no audio
PCM (2/0)
PCM (2/0)
PCM (2/0)
LPCM
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
PCM (2/0)
PCM (2/0)
LPCM
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
PCM (2/0)
PCM (3/4.1)
RAW
Auto
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
RAW
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
not tested
not tested
RAW
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
Close
Auto
no audio
no audio
no audio
not tested
not tested
Close
RAW5.1
no audio
no audio
no audio
not tested
not tested
Close
RAW7.1
no audio
no audio
no audio
not tested
not tested
Auto
Auto
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested
Auto
RAW5.1
Dolby Digital (3/2.1)
no audio
DTS (3/2.1)
not tested
not tested
Auto
RAW7.1
Dolby TrueHD (3/4.1)
Dolby TrueHD (3/4.1)
DTS-HD MA (5/2.1)
not tested
not tested

It took me hour and half to test

what do you mean with DTS-HD MA (5/2.1) and Dolby TrueHD (3/4.1)?

with RAW and RAW7.1 i never have problem, A/V reciver show 7.1 DTS-HD MA/Dolby TrueHD.

which file do you have tested? this?
http://www.demo-world.eu/download-2d-trailers/? file=dolby_truehd_channel_check_lossless-DWEU.mkv
http://www.demo-world.eu/download-2d-trailers/?file=dts_hd_master_audio_sound_check_7_1_lossless-DWEU.mkv
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airsoft

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Re: Decoding audio Dolby TrueHD
« Reply #13 on: October 19, 2015, 02:40:25 PM »
Quote from: looun on October 19, 2015, 02:10:13 PM

what do you mean with DTS-HD MA (5/2.1) and Dolby TrueHD (3/4.1)?

with RAW and RAW7.1 i never have problem, A/V reciver show 7.1 DTS-HD MA/Dolby TrueHD.

which file do you have tested? this?
http://www.demo-world.eu/download-2d-trailers/? file=dolby_truehd_channel_check_lossless-DWEU.mkv
http://www.demo-world.eu/download-2d-trailers/?file=dts_hd_master_audio_sound_check_7_1_lossless-DWEU.mkv

1) I mean with (5/2.1) and (3/4.1) the same 7.1 - the exact channel/speaker location than my receiver writes on its display
2) No. I've 3 disks each is 4 TB :) and should have enough movies to test - don't need an example to test it ;)

Try with MKV container and Dolby TrueHD and will have a problem, I know that there is no problem with DTS-HD (it has an official core even in MKV container) :)
The topic is for decoding of Dolby TrueHD.

Regards
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bvliviu

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Re: Decoding audio Dolby TrueHD
« Reply #14 on: October 25, 2015, 02:45:35 PM »
Hi,i have an Logitech Z 906 speaker system , he cannot decode TrueHD...he can only DTS.What shall i do in order to hear the sound?
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