J
J. Pendergraft
Guest
Phil, I agree. Is that why the sound on my digital satelite TV is out of sync with my picture? This really irritates me.
World Open temperatures?
- Thread starter Charles E
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Phil, I agree. Is that why the sound on my digital satelite TV is out of sync with my picture? This really irritates me.
4
4Mesh
Guest
Joel,
Usually I think sound sync is caused by one component or another not having quite enough horsepower to decode the stream fast enough to keep up with its counterpart. One being video and the other audio.
I use a home theater PC (htpc) and when I built mine I went overkill pretty hard on the cpu/vid/sound. I didn't really want to buy twice so I went a little overboard. I've read where lots of people have sound sync issues but I've got no experience with it. Most folks I read about seem to blame the playback device, or like in your case, the sat receiver. If your'e playing back hidef audio, the sat box is so busy decoding the video that it takes too long to get the audio out to the surround receiver. (im assuming you have a surround receiver if you have this trouble.) Ultimately though, any of the devices could lag for lack of enough processing power. Sometimes you can choose what component does the processing and eliminate it by using the stronger of your components. For example, I have an HD4870 ATI video card and for bluray playback, I can check a box (option in control panel) to either have the video card decode the movie video, or send it straight to the projector and have the projector do it. I use the computers video card. Same goes for audio. I can send raw stream data to my receiver (tho my receiver won't accept it, I CAN send it), or I can have the system decode the sound.
Why can't I just buy my HDCP TV, a Bluray player, an HDMI Cable and a Bluray movie disk, hit the play button and play the damn thing? Well, cause it's all digital and nothings ever simple when it's all 1s and 0s.
The really short answer to your question is, yes, the digital audio / video are the cause for sound sync issues. There's so much horsepower required to decrypt the content protection, that the playback devices have no headroom in their processing power to handle the output without falling behind. But then, we wouldnt want to be without our content protection would we!
Another issue that can cause SS is framerate cadence. That's, playing a 24fps source on a 60fps display. Then the internal clocks in the playback devices get all confused for whatever reason and again you have sound problems. The whole issue is beyond the realm of discussion here I'm afraid. Some folks even say that if they pause playback, their systems go haywire and get all outa sync. Your sat receiver should be giving you 60hz playback though. Again, I have no experience with that problem.
Were it not the moderator/OP who got us all digressed to this, I'd consider this discussion off topic!
Usually I think sound sync is caused by one component or another not having quite enough horsepower to decode the stream fast enough to keep up with its counterpart. One being video and the other audio.
I use a home theater PC (htpc) and when I built mine I went overkill pretty hard on the cpu/vid/sound. I didn't really want to buy twice so I went a little overboard. I've read where lots of people have sound sync issues but I've got no experience with it. Most folks I read about seem to blame the playback device, or like in your case, the sat receiver. If your'e playing back hidef audio, the sat box is so busy decoding the video that it takes too long to get the audio out to the surround receiver. (im assuming you have a surround receiver if you have this trouble.) Ultimately though, any of the devices could lag for lack of enough processing power. Sometimes you can choose what component does the processing and eliminate it by using the stronger of your components. For example, I have an HD4870 ATI video card and for bluray playback, I can check a box (option in control panel) to either have the video card decode the movie video, or send it straight to the projector and have the projector do it. I use the computers video card. Same goes for audio. I can send raw stream data to my receiver (tho my receiver won't accept it, I CAN send it), or I can have the system decode the sound.
Why can't I just buy my HDCP TV, a Bluray player, an HDMI Cable and a Bluray movie disk, hit the play button and play the damn thing? Well, cause it's all digital and nothings ever simple when it's all 1s and 0s.
The really short answer to your question is, yes, the digital audio / video are the cause for sound sync issues. There's so much horsepower required to decrypt the content protection, that the playback devices have no headroom in their processing power to handle the output without falling behind. But then, we wouldnt want to be without our content protection would we!
Another issue that can cause SS is framerate cadence. That's, playing a 24fps source on a 60fps display. Then the internal clocks in the playback devices get all confused for whatever reason and again you have sound problems. The whole issue is beyond the realm of discussion here I'm afraid. Some folks even say that if they pause playback, their systems go haywire and get all outa sync. Your sat receiver should be giving you 60hz playback though. Again, I have no experience with that problem.
Were it not the moderator/OP who got us all digressed to this, I'd consider this discussion off topic!
Phil,
Well, yes, it is a bit off topic. But these days, on-topic seems to be "Hi Guys, I'm new to this, building my first 1K rife. I've been reading about these new chamberings [read, "unproven"], so if I use one of them, with their technical edge, I think I can go out & beat all you old fogies. What do you think?" I think I've found another candidate for my ignore list.
* * *
I should have said I was a subspecies of audio engineer, a recording engineer. You learn not to say that in public, because people then think you have coiffured hair, an open shirt, and a coke spoon dangling prominently from a gold chain around your neck.
So my knowledge of circuitry was limited to not introducing too much distortion. Then too, horsepower [power supplies] was a common source of problems, though for different reasons. But the most common source of distortion when recording or playing music was acoustical, from the room during recording, and the room where played back. You could manage this pretty well in the studio, but a live recording was always an interesting adventure. As was a musician's home, where he/she listening to a tape.
The second largest source of distortion was, and probably remains, transducers. Any time you change energy from one form to another, you're in for trouble. Microphones in recording, speakers in playback. I imagine in most home theaters today, acoustics are ignored, and speakers are "Hi guys, I'm building my first home theater, and I read about these hot new speakers, what do you think?"
Well, yes, it is a bit off topic. But these days, on-topic seems to be "Hi Guys, I'm new to this, building my first 1K rife. I've been reading about these new chamberings [read, "unproven"], so if I use one of them, with their technical edge, I think I can go out & beat all you old fogies. What do you think?" I think I've found another candidate for my ignore list.
* * *
I should have said I was a subspecies of audio engineer, a recording engineer. You learn not to say that in public, because people then think you have coiffured hair, an open shirt, and a coke spoon dangling prominently from a gold chain around your neck.
So my knowledge of circuitry was limited to not introducing too much distortion. Then too, horsepower [power supplies] was a common source of problems, though for different reasons. But the most common source of distortion when recording or playing music was acoustical, from the room during recording, and the room where played back. You could manage this pretty well in the studio, but a live recording was always an interesting adventure. As was a musician's home, where he/she listening to a tape.
The second largest source of distortion was, and probably remains, transducers. Any time you change energy from one form to another, you're in for trouble. Microphones in recording, speakers in playback. I imagine in most home theaters today, acoustics are ignored, and speakers are "Hi guys, I'm building my first home theater, and I read about these hot new speakers, what do you think?"
4
4Mesh
Guest
Charles,
The parallels between shooting and home theater are endless. The nice thing about guns is you can just go out, sit down side by side and if the guy beats you, you know when you measure the group and score. With home theater, the "my pictures better'n your picture" stuff can get outa hand. It would be like awarding style points on to a target. Something like, "well, this is smaller but, look at the 9 in this target. This is better!" Well, it ain't when they sort em on the wailing wall! Thankfully, I'm happy with mine just the way it is and don't expect my stuff to "compete"
Horsepower nowadays is processing power. It's almost hard to describe what is going on in order to put a picture on your screen. Take Joels system for example. It's tough to get our brains around the numbers but his satellite signal is 1920x1080 progressive. That's 2,073,600 pixels. Now there's 4 bytes of color and chroma info for every one of them so that's 8,294,400 of data per frame. On his broadcast system at 60 frames per second, that's 497,664,000 or just round it off to 1/2 a Gigabyte of data per second. Well is it any wonder there's lag. It would be one thing if that data didn't need decompressed and processed before it was sent but once you add that in, the workload on the playback device is incredible.
In it's spare time, it get's to deal with 8 channels of 96Khz sound to decode also.
I do the same things with HT that I have tried to do wtih guns. Try to get the very most out of very few $. It's pretty amazing how nice a system can be put together with virtually no money (by not spending twice). Ya know, kinda like we've all done with guns.
The parallels between shooting and home theater are endless. The nice thing about guns is you can just go out, sit down side by side and if the guy beats you, you know when you measure the group and score. With home theater, the "my pictures better'n your picture" stuff can get outa hand. It would be like awarding style points on to a target. Something like, "well, this is smaller but, look at the 9 in this target. This is better!" Well, it ain't when they sort em on the wailing wall! Thankfully, I'm happy with mine just the way it is and don't expect my stuff to "compete"
Horsepower nowadays is processing power. It's almost hard to describe what is going on in order to put a picture on your screen. Take Joels system for example. It's tough to get our brains around the numbers but his satellite signal is 1920x1080 progressive. That's 2,073,600 pixels. Now there's 4 bytes of color and chroma info for every one of them so that's 8,294,400 of data per frame. On his broadcast system at 60 frames per second, that's 497,664,000 or just round it off to 1/2 a Gigabyte of data per second. Well is it any wonder there's lag. It would be one thing if that data didn't need decompressed and processed before it was sent but once you add that in, the workload on the playback device is incredible.
In it's spare time, it get's to deal with 8 channels of 96Khz sound to decode also.
I do the same things with HT that I have tried to do wtih guns. Try to get the very most out of very few $. It's pretty amazing how nice a system can be put together with virtually no money (by not spending twice). Ya know, kinda like we've all done with guns.
D
dk hunt 14
Guest
reloading
Phil, you know i have everything you need to load that good Heavy Gun. I have two new sets of brass turned and i can either load them to your specs or you can come down and load them yourself.
Phil, you know i have everything you need to load that good Heavy Gun. I have two new sets of brass turned and i can either load them to your specs or you can come down and load them yourself.
4
4Mesh
Guest
I guess you do don't ya. Thanks for the offer Matt, but I've got too many things that need done and the last thing I need is to go get started shooting again. Anyhow, Mikes the one you ought to be work'n on. I figured he'd be getting loaded up by now.
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