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Topic: AC3

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AC 3

Dolby Digital

Dolby Pro Logic

List of codecs

ATSC

Dolby vs DTS

WMA

Audio codec

MP3

MP2

Advanced Audio Coding

AIFF

Codec

PCM

Absolute threshold of hearing

	Transcoding Ac3 - Decompressing / Downmixing / Recompressing
		However, when reencoding to ac3 this can't be done because the decoder has the option, to or not to normalize the sound.
		The target ac3 file may have several origins, but for DVD backup it is within a VOB file.
		There are several ways of obtaining de Ac3 source and it is not the purpose of this article to explain them.
	www.geocities.com /transcodeac3 (2092 words)

	8 Dimensions Forum - AC3 in avi and multiple audio streams ?? (Site not responding. Last check: 2007-11-05)
		If I set JP to use AC3 and run it throught my digital receiver the audio is in sync.
		Now I have seperate CBR mp3 and Ac3 tracks in the file (I also did a test file with a different audio stream to verify this).
		If I share files I can not have the luxuary of an Ac3 track on any file because I would not be able to play it on the Analog system without sync issues.
	www.8dim.com /forum/topic.asp?TOPIC_ID=300 (543 words)

	AC3 Decoder 1.2.4a
		An easy-to-operate AC3 and unprotected VOB format files to PCM WAV, MP3, WMA, Ogg Vorbis formats converter.
		AC3 format file may contain up to 6 audio channels.
		AC3 DecoderÂ® combines the information from these channels into two encoded channels, which deliver to each of your ears, via conventional stereo headphones, its own unique sum of direct and reflected sound from each virtual speaker.
	www.padring.com /soft/Development/Tools/AC3Decoder.html (235 words)

	AC3 Home Page
		Our main focus here at AC3 is to provide the truth about God in an entertaining and, more importantly, a non-threatening way.
		About Us AC3 was started by a team of men and women in 1995 who wanted to DO church differently.
		We hope our Statements page answers some of the questions you may have about AC3 and why we do church the way we do.
	www.ac3.org (200 words)

	AVI (XVID) DVD, problems with AC3
		What am I doing wrong, the ac3 file is playable with mediaplayer and has the exact lenght of the playable.m2v videofile.
		AC3 file to the pic and click "fix"...the program will then fix the.
		AC3 file creating an error log along the way...This seems to be quite a common problem with.rar file movies.
	forums.afterdawn.com /thread_view.cfm/81248 (345 words)

	AC3Filter (Site not responding. Last check: 2007-11-05)
		In ac3 some channels (in most cases all channels) are grouped in one coupling channel beginning from some frequency - coupling frequency and stored in the bitstream in that form.
		And 5.1 in case of AC3 is not the same as 5.1 in case of computer acoustics.
		AC3 format was created for cinema rather than computer acoustics.
	ac3filter.sourceforge.net (4876 words)

	Video University: Video University Forums: Wedding & Event Videography: AC3 audio compatible with all DVD players
		I always use AC3 for weddings and so far have not had any issues with the audio.
		AC3 uses a good compression algorithm, so the only time anymore that I'd opt for a PCM format would be if I were making an audio DVD, like a concert recording or something.
		And even then, it would take a LOT of convincing for me to not use AC3 and record and encode in surround sound.
	www.videouniversity.com /forums/gforum.cgi?post=97053 (525 words)

	AC3 in Australia (Was Re: [mythtv] DVB 3.4 report) (Site not responding. Last check: 2007-11-05)
		AC3 in Australia (Was Re: [mythtv] DVB 3.4 report)
		Previous message: AC3 in Australia (Was Re: [mythtv] DVB 3.4 report)
		Next message: AC3 in Australia (Was Re: [mythtv] DVB 3.4 report)
	www.mythtv.org /pipermail/mythtv-dev/2005-January/029847.html (187 words)

	AC3/DTS data-CD Compatibility
		I used Smartripper v2.41 and DVD2AVI v1.77.3 to rip the sound streams (two AC3 (Dolby Digital) streams and one DTS stream) of track 17 "Highway to hell" from the "AC/DC, Stiff Upper Lip LIVE" DVD.
		However, when I connected the NorthQ via the digital output to my amplifier which has a DTS decoder, the DTS files played, but there were problems with the sound skipping all the time.
		The DTS files could only be listened to via the digital output and an external DTS decoder, and then the sound had problems with skipping.
	www.leien.info /nq/dvd-compatibility/contents/ac3-dts.htm (268 words)

	ac3 to dts, because of the dts sound quality, WHY ? (Site not responding. Last check: 2007-11-05)
		Did someone here know the point of extracting an ac3 from a dvd to convert it to a dts wav file for the creation of tracks to write on a dts cd ?
		I have heard a lot of time this no sense idea that a dts track have a much better sound because there is less compression but what is the point of having a better sound quality when at the base the primary sound track have a lost of quality because of the ac3 compression ?
		Re: ac3 to dts, because of the dts sound quality, WHY ?
	www.talkaboutaudio.com /group/alt.audio.dts/messages/20672.html (205 words)

	Application Procedure for an ac3 account (Site not responding. Last check: 2007-11-05)
		ac3 directly if you are not from a member academic institution.
		The need for Commercial Level security at ac3 for a discussion of why these are needed), along with instructions on how to access ac3.
		You should receive confirmation of your account's activation from ac3 within 24 hours.
	www.ac3.edu.au /applications.html (111 words)

	How to convert WAV/MPA/MP3 audio to AC3(DD) using Besweet
		AC3 is a compressed audio format(~1-3MB/min) that often is used in DVD Videos.
		Now you should have got a.ac3 file that you should be able to use in your authoring tool or multiplex with your video.
		If you have installed a AC3 decoder you should be able to play the.ac3 with Media Player.
	www.videohelp.com /forum/userguides/129419.php (317 words)

	MEDIATWINS : AC3 Decoder : Overview (Site not responding. Last check: 2007-11-05)
		An easy-to operate tool for converting AC3 and unprotected VOB format files to PCM WAV, MP3, WMA and Ogg Vorbis formats.
		New version of AC3 Decoder has been released.
		You have downloaded AC3 format file from the Internet, but your favourite audio player doesn't support AC3 format.
	www.mediatwins.com /products/1707-6.htm (338 words)

	Free-Codecs.com :: Download AC3 Filter 1.02a test8 : AC3 Filter is a DirectShow filter for AC3 decoding
		AC3 Filter is a high quality free DirectShow filter designed for real time audio decoding and processing.
		- There is a bug in the AC3 Filter 0.70b (and perhaps later versions) that prevents it from working well with Media Files that contain multiple AC3 Audio Tracks.
		Installing AC3 Filter 0.7b FIX will solve the problem (this fix doesn't contain all files, install standard version first!)
	www.free-codecs.com /download/AC3_Filter.htm (428 words)

	VideoHelp.com Forum Archive - AC3 to DVD
		I checked the AC3 files out and found that they are 44100 Hz not 48000 Hz so that accounts for the slight speed up.
		I tried to use ffmpegX and ffmpeg from the Terminal, and found that neither will resample the 44100 to 48000 as AC3..
		The AC3 files are episodes of the recent Hitch Hikers Guide to the Galaxy series (Tertiary Phase) and were downloaded from the BBC website.
	www.videohelp.com /forum/archive/t253304.html (970 words)

	Encoding AC3 Audio with A.Pack
		AC3 is a compressed audio format, which uses a much lower data rate than standard AIFF or WAV audio.
		AIFF is around 1500 kilobits per second (kbps), while AC3 stereo is typically compressed at 192 kbps.
		The default value of Film Standard Compression is used only when the AC3 file will accompany a theatrical film print; setting this for a DVD audio file will cause the audio level to be automatically adjusted throughout the AC3 file.
	www.kenstone.net /fcp_homepage/a_pack_warmouth.html (1293 words)

	AC3 audio
		i have a avi xvid file the audio is ac3 when i try to save it to wav format to author in tmpgenc the wav file is empty when i try to play it back never came across ac3 audio b4 just usually mp3 what do i do to make this audio file work properly
		I believe the audio file AC3 is what you need to author a DVD or whatever.
		I supposedly installed the AC3 codec but I dont know what it is. When I go to capture the only audio codec I see that might be it it ATRAC3.
	forums.afterdawn.com /thread_view.cfm/26891 (428 words)

	Kelly Industries - Put AC3 Surround Sound On A Normal Audio CD-R
		In order to burn an ac3 file to an audio redbook cdr it has to be in the Dolby Digital WAV file format and at 44.1k SampleRate.
		You cannot put use the *.AC3 extention as it's not in the redbook spec.
		There isn't a way to convert 48k AC3 to 44.1k AC3 without decoding the 48k audio to PCM and then converting each channel, 6 of them, to 44.1k and then re-encoding them.
	www.kellyindustries.com /diy_5_1.html (1986 words)

	AC3 to MP3 : How to decode AC3?
		AC3 Decoder is a An easy-to operate tool for converting AC3 and unprotected VOB format files to PCM WAV, MP3, WMA and Ogg Vorbis formats.
		WMA 9 is backward-compatible with older Windows Media Audio –; compatible decoders, so you can play back new content on old players, operating systems, and electronic devices.
		AC3 Decoder combines all this information into two encoded channels that deliver to each of your ears, via conventional stereo headphones, its own unique sum of direct and reflected sound from each virtual speaker (such as A3D™ or EAX™).
	www.ac3-mp3.com (271 words)

	AC3 - Crane Certification -AC3 - Power Platform Services -AC3 - Machinery Maintenance - AC3 (Site not responding. Last check: 2007-11-05)
		AC3, a California Corporation, is accredited by CAL - OSHA and the United States Department of Labor to perform the services listed below.
		We offer competitive pricing, extensive insurance coverage, in house surveyors, and a staff of trained union technicians who strive to give AC3's customers the quality service they deserve.
		AC3 has offices in Northern California and Southern California to provide prompt service to our customers throughout California and Nevada
	www.ac3online.com (168 words)

	Recording AC3 Audio
		I "think" the sound card will so what you want, but you will probably need to install the AC3 filter [url]http://ac3filter.sourceforge.net/[/url] I believe this will do what you want it to - I can't guarantee that though.
		I'll have to record the AC3 audio in its own file then mux it together with the MPEG2 from the PVR 250 into a VOB that I can play.
		AC3 is broadcast in many formats from 2.0, 2,1, 4.0, 4.1, 5.0, 5.1, etc. Most stations and Pay per View channels don't broadcast anything more than normal stereo or 2.1
	forum.byopvr.com /dvr/index.php/topic,859.0.html (1251 words)

	ac3 - Educatione (Site not responding. Last check: 2007-11-05)
		The ac3 Education Program is a collaborative effort that is being developed by and delivered through ac3's university partners and TAFE.
		It is managed by Professor Lindsay Botten of UTS who oversees the program administration and coordination and convenes the University- based Computational Science and Engineering Education Committee and the Vocational Education Steering Group.
		In order to foster widespread development and ownership of the Education Program throughout the ac3 network, it was decided that a decentralised approach was needed.
	www.ac3.com.au /education.htm (670 words)

	[Avifile][ avifile-Bugs-434068 ] AC3 support incomplete
		I used to be able to compile it before but I had to hack the makefile to change ac3.o to ac3.lo and a few things like that...
		There are lots of 2 CD DivX movies encoded with AC3 audio so it might be nice to be able to play them.
		I currently use xine which supports AC3 audio using it's own internal decoder and then the video is processed using the win32 libs.
	www.mail-archive.com /avifile@prak.org/msg00969.html (233 words)

	Gamingforce Interactive Forums - Ac3 Vob (Site not responding. Last check: 2007-11-05)
		Jul 4, 2003 9:35 PM there is audio that is cut off at then of a chapter and continues into the next
		A VOB can't be "better quality" than AC3...
		There are several programs you can get to rip AC3 audio from VOBs, though.
	www.gamingforce.com /forums/printthread.php?t=6681 (257 words)

	Download AC3 Decoder 1.2.5 - AC3 and unprotected VOB files converter.
		Download AC3 Decoder 1.2.5 - AC3 and unprotected VOB files converter.
		You'll be hard pressed to find a DVD that doesn't have protection or that this program will work with.
		With the help of WMA Encoder Decoder, converting WAV PCM, MP3, Ogg Vorbis and AC3 files to WMA and decoding WMA to WAV PCM format becomes as easy as 1-2-3.
	www.vadino.com /Free+Download+AC3+Decoder (618 words)

	Divxstation - AC3 Filter - Audio - Software
		AC3 Filter - 0.70b & AC3 Filter 1.01a RC4
		AC3 Filter - 0.70b & AC3 Filter 1.01a RC2
		AC3 Filter - 0.70b & AC3 Filter 1.01a RC1
	divxstation.com /softwareId.asp?sId=163 (217 words)

	Using Nero for AC3 endoding from WAV files
		I've read that some AC3 encoders are not officially certified, which can potentially lead to playback problems on certain decks.
		The plug-in on the page you linked is not officially certified, and I've read that it can potentially lead to problems when the resulting DVD is played on certain decks.
		I've looked through all the separate Nero apps in the "Ultra" suite, and the only one that seems to deal with encoding one file type to another is the "Encode Files" part of the regular "Nero Burning ROM" program.
	www.cdrinfo.com /Forum/fb.asp?m=100036&go=last&key= (844 words)

	AC3 Decoder, AC3 Codec, AC3 to WAV AC3 to MP3 WMA OGG Decoder Download
		AC3 Decoder is easy-to operate tool for converting AC3 and VOB files to PCM WAV, MP3, WMA and Ogg Vorbis formats.
		AC3 Decoder is easy-to operate tool for converting AC3 and unprotected VOB format files to PCM WAV, MP3, WMA and Ogg Vorbis formats.
		AC3 Decoder combines all this information into two encoded channels that deliver to each of your ears, via conventional stereo headphones, its own unique sum of direct and reflected sound from each virtual speaker (such as A3D?
	www.cheapprograms.com /new_add/new20040103/dvd_ac3_ripper.htm (441 words)

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