 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
220.255.2.92
In Reply to: RE: I need your help! posted by No Regrets on December 8, 2011 at 10:44:10
I have 2 different sat boxes for tv programs. Even though i have a hdmi capable receiver, both set top boxes are output directly into the tv via hdmi, and i have the tv analog stereo output connected into the receiver. The reason is that often there is very noticeable time lag of the video via the tv when the hdmi cable is connected into the receiver first before then connected to the tv. The spoken dialogue sounds from the receiver and speakers would be ahead of the lips movement shown on the tv screen by very noticeable timing. With bigger screens, this video time lag problem becomes even more worst.Now, most receivers would have a lip-sync function to compensate for the video time lag (delaying the audio by 70ms to 300ms depending on tv models and size), but I don't recommend to use it because these lip sync function will always introduce jitter into the audio, making the sound unpleasant to listen to. I prefer to have the hdmi cable connected directly into the tv. Then the audio that's output from the tv into the receiver is perfectly syncd with the video image on screen without having any jitter problem coming to degrade the sound quality reproduced through the receiver and speakers. In your case, your linn amp neither has hdmi inputs, nor does it has lip sync audio delay function.
I consider analog stereo outputs on tv sets to be an essential feature!
Follow Ups:
Thank you Jeromelang for bringing this to my attention. I'll have to try and talk with the dealer I am getting the tv from about this and see what they have to say.
They have not yet delivered the tv to me as I am having a stand custom built for it and it will take a couple of weeks for me to receive that.
So I wonder what all the other people do that own these Panasonic Plasma TV's. I can't believe that they all just listen to the tv's built in speakers.
HDMI is the most jitter prone interface used for audio and you recommend against a receiver padding the audio with zeros because it will add jitter? Really? That's like recommending that a person who is totally blind not wear shades because they will see less detail.
hdmi cable/interface jitter cause loss of low level details, and collapse of soundstaging.
digital delay creates a type of listening fatigue and makes the listener feels "edgy"
I'd like to learn more about this. Please direct me to where I can read more information about the affects of "delay" jitter.
".....padding the audio with zeros....." = digital delay
How many zeros do you need to add to delay the audio by 120m/s?
I believe you mean " ms " (milliseconds), as the " / " between " m/s " means " per " (eg, miles/second, meters/second, etc) and delay time in Home Theater applications is normally expressed in milliseconds ( ms ). If you meant something else by m/s , perhaps you could type out the abbreviation.
But to answer your question, the DSP will output all zeros as a buffer, for a user specified amount of time (in your case, 120 milliseconds), before the audio stream it received is sent to the D-A converter. If you'd like to know how many actual zeros are in 120ms, you need to also specify the sampling rate and the bit depth.
Again, I am asking you to point me to relevant discussion of delay induced jitter so that I can read up on this subject.
Post a Followup:
| FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
||||||||||||||
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
