HDMI, Toslink and DTS HD Pass through... - Blu-ray Forum

mark_d_drake · 08-17-2008, 03:35 PM

Can anyone help with this...

I have just replaced my 34" Toshiba Direct View 1080i television that only supports component inputs with a new Sony 40" LCD KDL-40Z4100. My sources are a Sony BDP-S300, a PS3 and a Helios-X3000. My audio set up consists of a Meridian AV562V/565 combination with Meridian DSP5000 Digital Front and Center speakers and a pair of older Meridian M30's analog speakers as my rear channels.

Since all of my sources are HDMI capable, this has allowed to move in the brave new world of HDMI interconnects. However since I will not be replacing my Meridian AV562V/565 combination any time soon, I figured I could use HDMI interconnect to connect the BD-S300 to the KDL-40Z4100 and then use the Toslink digitial out on the KDL-40Z4100 to feed the audio signal back to the 562/565V. This appears to work fine for all encodings but DTS True HD.

With anything that is encoded Dolby Digital (eg 10,000 BC) the reciever gets a 5.1 signal that it can decode. It does not appear to matter whether the selected signal is TrueHD or not. With anything that in encoded DTS True HD, (eg Live Free or Die Hard), the reciever is only recieving a PCM signal from the TV. However if I hook the digital output from Blu Ray directly to the 562/565 then a DTS 5.1 signal is recieved.

Is this expected, or is it a 'bug' in the s/w on the TV.

-Mark

mark_d_drake · 08-17-2008, 03:56 PM

Actually it appears to be generic to DTD. I just tested the War of the Worlds DVD, which has a normal DTS Track and the same problem is observed. The Dolby Digital signal can be passed from the S300 to the TV via HDMI and then from the TV to the Reciever via TOSLINK, the DTS signal cannot. Somehow between the Blue Ray Play and the Reciever the signal is being downconverted to PCM.

My_Two_Cents · 08-17-2008, 11:12 PM

You cannot pass the HD audit codecs (Dolby True HD or DTS Master) via oprical, no matter how you have things set up. The best you will be able to achieve will be to listen to the lossy tracks. Not familiar with the Meridian, but assume it does not accept HDMI audio?

08-17-2008, 03:35 PM	#1
mark_d_drake Senior Member Member since:Jan 2008 Location:Silicon Valley Blu-ray collection:1941 DVD collection:455 Digital collection:378 Blu-ray reviews:1 Trading Score:159	HDMI, Toslink and DTS HD Pass through... Can anyone help with this... I have just replaced my 34" Toshiba Direct View 1080i television that only supports component inputs with a new Sony 40" LCD KDL-40Z4100. My sources are a Sony BDP-S300, a PS3 and a Helios-X3000. My audio set up consists of a Meridian AV562V/565 combination with Meridian DSP5000 Digital Front and Center speakers and a pair of older Meridian M30's analog speakers as my rear channels. Since all of my sources are HDMI capable, this has allowed to move in the brave new world of HDMI interconnects. However since I will not be replacing my Meridian AV562V/565 combination any time soon, I figured I could use HDMI interconnect to connect the BD-S300 to the KDL-40Z4100 and then use the Toslink digitial out on the KDL-40Z4100 to feed the audio signal back to the 562/565V. This appears to work fine for all encodings but DTS True HD. With anything that is encoded Dolby Digital (eg 10,000 BC) the reciever gets a 5.1 signal that it can decode. It does not appear to matter whether the selected signal is TrueHD or not. With anything that in encoded DTS True HD, (eg Live Free or Die Hard), the reciever is only recieving a PCM signal from the TV. However if I hook the digital output from Blu Ray directly to the 562/565 then a DTS 5.1 signal is recieved. Is this expected, or is it a 'bug' in the s/w on the TV. -Mark Last edited by mark_d_drake; 08-17-2008 at 03:42 PM.

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08-17-2008, 03:56 PM	#2
mark_d_drake Senior Member Member since:Jan 2008 Location:Silicon Valley Blu-ray collection:1941 DVD collection:455 Digital collection:378 Blu-ray reviews:1 Trading Score:159	Actually it appears to be generic to DTD. I just tested the War of the Worlds DVD, which has a normal DTS Track and the same problem is observed. The Dolby Digital signal can be passed from the S300 to the TV via HDMI and then from the TV to the Reciever via TOSLINK, the DTS signal cannot. Somehow between the Blue Ray Play and the Reciever the signal is being downconverted to PCM.

08-17-2008, 11:12 PM	#3
My_Two_Cents Blu-ray Knight Top contributor Member since:Dec 2007 Location:Wherever I may roam.... Home Theater Gallery:40 4K collection:35 Blu-ray collection:507 DVD collection:19 Blu-ray reviews: 1 Trading Score:4	You cannot pass the HD audit codecs (Dolby True HD or DTS Master) via oprical, no matter how you have things set up. The best you will be able to achieve will be to listen to the lossy tracks. Not familiar with the Meridian, but assume it does not accept HDMI audio?

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