Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.
View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 | 4
26631 posts

Uber Geek
+1 received by user: 6129

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 134895 2-Jun-2008 11:54
Send private message

TV3 announced around the time Freeview launched that they would not be transmitting in AC3 5.1 initially but that it would be coming in "several months".

21236 posts

Uber Geek
+1 received by user: 4273

Trusted
Subscriber

  Reply # 134955 2-Jun-2008 15:35
Send private message

RustyGonad:

Broadcasting 2 channels, in a 5.1 channel stream just doesn't cut it IMO. Especially when most of the shows currently broadcast in HD on TV3 already have a broadcast AC3 soundtrack in the US.


Is it a 5.1 bitstream with the rears and center quiet, or is it a 2 channel AC5 stream? If its a 5.1 with silent channels, then yeah, people will have problems, but all my AVR's let me turn on prologic (or prologic 2) for a 2.0 channel DD track, so I fail to see any issues with them delivering it as a 2.0 in addition to the bad sounding aac+ stream.


The problem is, is that unless you re-matrix the sound in your amp (which defeats the purpose of AC3 in the first place), you only get the left and right speakers working. IMO Left and Right only in an AC3 stream sounds terrible.

Currently the AAC stream sounds better, simply because the voice channel stays in the centre where it should be.

Maybe theres a huge raft of technical issues which I'm missing.


The framerate issue is one thing that has to be solved, the only way is to decode, convert the sample rate and re-encode. Being there when making a dvd compilation of stuff sourced from both 50 and 60 field dvds, believe me, its not fun.

If they only have a 2 channel source, then what they are doing is correct. If they start butchering it to a 5.1 with a prologic 2 decoder at their end, then it removes any hope of getting a good sounding 2 channel at the other end from the bitstream. Plus a lot of content isnt prologic encoded to start with so by decoding it you just end up with random crap in the rear channels and stuff popping from the center to a main channel at will. Some people like that, but to send that trash out is IMO irresponsible.

If they were to have the smarts to decode things that were prologic and leave stereo stuff alone then it would be better, but you still have the problem that they are making up the .1 from the content in the other channels rather then it being a proper LFE, and if they send the .1 with nothing in it (which is correct for the output of prologic) then there will be some people complaining that they have nothing coming out of their sub, and if they crossover from the mains then it will stuff people with a properly setup system up that have 0 LFE mixin because they dont like it.

Cant win really, but IMO what they are doing now is an improvement over the aac+ from what I have heard on my stereo computer speakers and headphones.





Richard rich.ms

722 posts

Ultimate Geek


  Reply # 135021 2-Jun-2008 19:51
Send private message

I have tried playback of TV3 HD broadcasts with AC3 stream & found that using Nvidia's Purevideo 223 codec produces an extremely poor audio signal when Spdifed to my Denon AV receiver. Very tinny sound with minimal bass is all but gone when I use PowerDVD7 as the default audio codec.

It is frustrating, though that I can't get a normalised sound with both the (until now) Dolby Prologic sound & that of Dolby Digital. The digital signal is some 15% quieter.




Silverstone LC14 HTPC Case/Intel E4600 CPU/GA-EP35-DS3 MOBO/Asus EN9500GT graphics/2GB RAM/total 2TB HDD space/HVR-2200 & 2X 150MCE tuner cards/LG GGC-H20L BD Drive/MCE2005/Mediaportal/TVServer 1.1.0Final/LG 55"3D LED-TV/Denon AVR-1803 receiver/X1 projector

483 posts

Ultimate Geek

Trusted

  Reply # 135298 3-Jun-2008 20:37
Send private message

CSI New York - Currently being broadcast in Dolby Digital 5.1, all channels active.  Now thats what DD should sound like!  Smile

Somethings definitely changed - even the adds are in proper 5.1 - hopefully this sticks...

1557 posts

Uber Geek
+1 received by user: 149

Trusted

  Reply # 135302 3-Jun-2008 20:49
Send private message

I dont hear it.
What needs to be set up?
Using dvbviewer...




CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 




80 posts

Master Geek


  Reply # 135305 3-Jun-2008 20:51
Send private message

I can confirm; CSI: New York is indeed being broadcast in 5.1! I suspect Boston Legal will be also. But, I guess I'll wait an see. :)

483 posts

Ultimate Geek

Trusted

  Reply # 135306 3-Jun-2008 20:51
Send private message

Not sure with DVBViewer - could never get it to work properly with DD.

I'm using Media Center with the beta patch.  AC3 as the filter.

1557 posts

Uber Geek
+1 received by user: 149

Trusted

  Reply # 135307 3-Jun-2008 20:52
Send private message

RustyGonad: Not sure with DVBViewer - could never get it to work properly with DD.

I'm using Media Center with the beta patch.  AC3 as the filter.


Does anything need to be setup in the filter?




CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


483 posts

Ultimate Geek

Trusted

  Reply # 135309 3-Jun-2008 20:55
Send private message

mentalinc:
RustyGonad: Not sure with DVBViewer - could never get it to work properly with DD.

I'm using Media Center with the beta patch.  AC3 as the filter.


Does anything need to be setup in the filter?


Got mine setup for AS IS (no change) - output to SPDIF

1557 posts

Uber Geek
+1 received by user: 149

Trusted

  Reply # 135310 3-Jun-2008 21:00
Send private message

Ok got it working:D

open up ac3filter config.
then output format change it to 3/2+sw 5.1 channels




CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


1557 posts

Uber Geek
+1 received by user: 149

Trusted

  Reply # 135313 3-Jun-2008 21:31
Send private message

Sorry double post:

NO 5.1 for Boston legal




CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


483 posts

Ultimate Geek

Trusted

  Reply # 135315 3-Jun-2008 21:33
Send private message

mentalinc: Sorry double post:

NO 5.1 for Boston legal


Can't work it out - they obviously know how to do it right - they just proved it.  Event the adds were correct. Frown

Kinda frustrating really...

1557 posts

Uber Geek
+1 received by user: 149

Trusted

  Reply # 135318 3-Jun-2008 21:40
Send private message

RustyGonad:  Event the adds were correct. Frown


Ads were not 5.1 here - they just reverted back to the normal 2 channel.




CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


1099 posts

Uber Geek
+1 received by user: 446


  Reply # 135345 3-Jun-2008 23:14
Send private message

RustyGonad:
mentalinc: Sorry double post:

NO 5.1 for Boston legal


Can't work it out - they obviously know how to do it right - they just proved it.  Event the adds were correct. Frown

Kinda frustrating really...



The Freeview EPG did not list a DD soundtrack for Boston Legal and it was transmitted in plain old vanilla stereo.

I did watch CSI: and it sounded superb through my home theatre. Incredible surround effects and audio placement for the scene. I did find that the adds were in normal stereo, but switching the Zinnie back to PCM audio brough the Dolby Prologic into play.

Now to check out Underbelly!



80 posts

Master Geek


  Reply # 135354 4-Jun-2008 00:18
Send private message

Even though Underbelly had a DD logo on it's broadcast it was still only in Stereo. Oh well, can't have it all I guess. ;)

1 | 2 | 3 | 4
View this topic in a long page with up to 500 replies per page Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Hawaiki Transpacific cable ready-for-service
Posted 20-Jul-2018 11:29


Microsoft Dynamics 365 Business Central launches
Posted 10-Jul-2018 10:40


Spark completes first milestone in voice platform upgrade
Posted 10-Jul-2018 09:36


Microsoft ices heated developers
Posted 6-Jul-2018 20:16


PB Technologies charged for its extended warranties and warned for bait advertising
Posted 3-Jul-2018 15:45


Almost 20,000 people claim credits from Spark
Posted 29-Jun-2018 10:40


Cove sells NZ's first insurance policy via chatbot
Posted 25-Jun-2018 10:04


N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08


Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03


Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27


Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13


Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00


Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12


Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52


Kogan.com to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.