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| UK Digital Video (uk.rec.video.digital) For the discussion of all aspects of digital video, including all digital video formats, camera use, editing, post production & all associated equipment, hardware and software. Advertising is prohibited. |
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#1
November 6th 06, 05:06 PM
posted to uk.rec.video.digital
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 Peak audio levels for PAL DVD? Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth   |
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#2
November 6th 06, 08:35 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "BlahDiBlah" wrote in message .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth Are you using Dolby Digital? If your not then you will notice a difference compared to commercial DVD's which do. This is becuase Dolby encoding reduces the volume used. |
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#3
November 6th 06, 08:51 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "BlahDiBlah" schreef in bericht .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... Hi Gareth, There is an interesting article about this at http://www.kenstone.net/fcp_homepage...dio_peaks.html. I personally set my max level at -6 dB. This gives me a volume comparable with a standard TV broadcast and leaves enough headroom if I need to use really loud sound effects, like gun shots, planes taking off, etc. Naturally, the maximum permissable audio level for PAL DVD is 0 dB; beyond that clipping sets in which sounds awful. -- Lou van Wijhe Website: http://home.hccnet.nl/jl.van.wijhe/ AntiSpam: Vervang INVALID in e-mail adres door NL AntiSpam: Replace INVALID in e-mail address by NL |
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#4
November 7th 06, 10:50 AM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "John Russell" wrote in message ... "BlahDiBlah" wrote in message .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth Are you using Dolby Digital? If your not then you will notice a difference compared to commercial DVD's which do. This is becuase Dolby encoding reduces the volume used. Hi John, no, just plain old stereo... hmmm maybe I need to look at encoding Dolby Digital? Does that make sense if I'm not working in surround? thanks, Gareth |
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#5
November 7th 06, 10:54 AM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "Lou van Wijhe" wrote in message t.nl... "BlahDiBlah" schreef in bericht .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... Hi Gareth, There is an interesting article about this at http://www.kenstone.net/fcp_homepage...dio_peaks.html. I personally set my max level at -6 dB. This gives me a volume comparable with a standard TV broadcast and leaves enough headroom if I need to use really loud sound effects, like gun shots, planes taking off, etc. Naturally, the maximum permissable audio level for PAL DVD is 0 dB; beyond that clipping sets in which sounds awful. -- Lou van Wijhe Website: http://home.hccnet.nl/jl.van.wijhe/ AntiSpam: Vervang INVALID in e-mail adres door NL AntiSpam: Replace INVALID in e-mail address by NL Thanks Lou, I'll give -6dB a go, then. Interesting to see that peaks as low as -20dB were being talked about! Gareth |
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#6
November 7th 06, 01:45 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "BlahDiBlah" wrote in message . uk... "John Russell" wrote in message ... "BlahDiBlah" wrote in message .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth Are you using Dolby Digital? If your not then you will notice a difference compared to commercial DVD's which do. This is becuase Dolby encoding reduces the volume used. Hi John, no, just plain old stereo... hmmm maybe I need to look at encoding Dolby Digital? Does that make sense if I'm not working in surround? thanks, Gareth The combined bitrate for DVd Video and Audio cannot exceed 10684 BPS(or something like that!). If you use PCM then that takes up 1500 BPS, leaving the rest for video. If you use Dolby Digital 2.0 (i.e stereo) you can reduce the 1500 to say 256, and have either better quality video, or longer recordings. |
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#7
November 7th 06, 02:04 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "BlahDiBlah" schreef in bericht o.uk... "Lou van Wijhe" wrote in message t.nl... "BlahDiBlah" schreef in bericht .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... Hi Gareth, There is an interesting article about this at http://www.kenstone.net/fcp_homepage...dio_peaks.html. I personally set my max level at -6 dB. This gives me a volume comparable with a standard TV broadcast and leaves enough headroom if I need to use really loud sound effects, like gun shots, planes taking off, etc. Naturally, the maximum permissable audio level for PAL DVD is 0 dB; beyond that clipping sets in which sounds awful. -- Lou van Wijhe Website: http://home.hccnet.nl/jl.van.wijhe/ AntiSpam: Vervang INVALID in e-mail adres door NL AntiSpam: Replace INVALID in e-mail address by NL Thanks Lou, I'll give -6dB a go, then. Interesting to see that peaks as low as -20dB were being talked about! I do indeed have some commercial DVDs with max levels that low and on my setup I then have to turn the volume all the way up. Certainly not my choice. Lou |
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#8
November 7th 06, 07:35 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "John Russell" wrote in message ... "BlahDiBlah" wrote in message . uk... "John Russell" wrote in message ... "BlahDiBlah" wrote in message .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth Are you using Dolby Digital? If your not then you will notice a difference compared to commercial DVD's which do. This is becuase Dolby encoding reduces the volume used. Hi John, no, just plain old stereo... hmmm maybe I need to look at encoding Dolby Digital? Does that make sense if I'm not working in surround? thanks, Gareth The combined bitrate for DVd Video and Audio cannot exceed 10684 BPS(or something like that!). If you use PCM then that takes up 1500 BPS, leaving the rest for video. If you use Dolby Digital 2.0 (i.e stereo) you can reduce the 1500 to say 256, and have either better quality video, or longer recordings. P.S. The DVD- video standard requires a minimum of either a PCM or an AC3 audio track. The AC3 track dosn't need to be 5.1, 2.0 will suffice. |
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#9
November 9th 06, 08:52 AM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? "John Russell" wrote in message ... "BlahDiBlah" wrote in message . uk... "John Russell" wrote in message ... "BlahDiBlah" wrote in message .uk... Hi folks, does anyone know what the maximum permissable audio level is for PAL DVD? When preparing CDs, I usually set my limiter at -0.2dB. However, this seems to be waaaaay loud for DVD... thanks, Gareth Are you using Dolby Digital? If your not then you will notice a difference compared to commercial DVD's which do. This is becuase Dolby encoding reduces the volume used. Hi John, no, just plain old stereo... hmmm maybe I need to look at encoding Dolby Digital? Does that make sense if I'm not working in surround? thanks, Gareth The combined bitrate for DVd Video and Audio cannot exceed 10684 BPS(or something like that!). If you use PCM then that takes up 1500 BPS, leaving the rest for video. If you use Dolby Digital 2.0 (i.e stereo) you can reduce the 1500 to say 256, and have either better quality video, or longer recordings. Hmmm, audio compression (in terms of bitrate) is something that's passed me by so far. Probably due to the lack of any options besides "Uncompressed" in the PPro dropdown window! Sounds like it's something I should be doing. Thanks for the tip, John! Gareth |
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#10
November 9th 06, 03:48 PM
posted to uk.rec.video.digital
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| Peak audio levels for PAL DVD? In message , John Russell writes Snipped... The combined bitrate for DVd Video and Audio cannot exceed 10684 BPS(or something like that!). If you use PCM then that takes up 1500 BPS, leaving the rest for video. If you use Dolby Digital 2.0 (i.e stereo) you can reduce the 1500 to say 256, and have either better quality video, or longer recordings. P.S. The DVD- video standard requires a minimum of either a PCM or an AC3 audio track. The AC3 track dosn't need to be 5.1, 2.0 will suffice. I've been following this thread with some interest - but I'm puzzled. Does bitrate equate with peak audio level(s) ? IIRC dB in this context is referenced to 1Vpk-pk. And since we're talking volts, then -6dB is 0.5Vpk-pk. IIRC the trick with audio is to ensure that no peak clipping occurs - no matter how high the bitrate is, if clipping occurs then distortion will be introduced. To avoid audio clipping, I have (for some time) used Magix Cleaning Lab. Applying Normalisation seems to do the trick. I've also found useful (where video is shot in low audio situations) the Denoiser and Dehisser facilites. -- Tony Morgan |
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