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Topic: Advanced Audio Codec

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	Advanced Audio Coding - Wikipedia, the free encyclopedia
		AAC was designed as an improved-performance codec relative to MP3 (which was specified in MPEG-1 and MPEG-2) by the ISO/IEC in 11172-3 and 13818-3.
		AAC is a wideband audio coding algorithm that exploits two primary coding strategies to dramatically reduce the amount of data needed to represent high-quality digital audio.
		AAC, which was first specified in the standard known formally as ISO/IEC 13818-7, was published in 1997 as a new "part" (distinct from ISO/IEC 13818-3) in the MPEG-2 family of international standards.
	en.wikipedia.org /wiki/Advanced_Audio_Coding (1909 words)

	Advanced Audio Coding - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-01)
		Advanced Audio Coding (AAC) is a lossy data compression scheme intended for audio streams.
		AAC, ISO/IEC 13818-7, is an extension of the MPEG-2 international standard, ISO/IEC 13818-3.
		Depending on the complexity of the bitstream to be encoded, the desired performance and the acceptable output, implementers may create profiles to define which of a specific set of tools they want use for a particular application.
	www.encyclopedia-online.info /Advanced_Audio_Codec (316 words)

	Audio Codec
		Codec is a portmanteau of "coder/decoder", which describes a device or program capable of performing transformations on a data stream or signal.
		Codecs can both put the stream or signal into an encoded form (often for transmission, storage or encryption) and retrieve, or decode that form for viewing or manipulation in a format more appropriate for these operations.
		The raw encoded form of audio and video data is often called essence, to distinguish it from the metadata information that together make up the information content of the stream and any "wrapper" data that is then added to aid access to or improve the robustness of the stream.
	www.econtentos.com /audio-codec.htm (467 words)

	Liquid Audio: Company: Press Room: 1997 Releases (Site not responding. Last check: 2007-11-01)
		Audio codecs are complex algorithms that greatly reduce the storage required for digital music while preserving the sonic quality.
		Fraunhofer's Advanced Audio Codec (AAC) and MPEG Layer 3 (MP-3) are the latest generation audio codecs that provide superior sound quality with far less data.
		AAC, developed at Fraunhofer-IIS in conjunction with MPEG audio standards committee, is widely recognized as the most technically advanced audio compression algorithm currently available.
	www.liquidaudio.com /company/press/1997/archive/fraunpr.asp (377 words)

	Digital audio music files (Site not responding. Last check: 2007-11-01)
		In other words, audio files, which were typically large (such as WAV files from CDs), could be compressed to a fraction of their original size without a significantly noticeable loss in quality to the human ear.
		AAC is widely known to be the best when it comes to audio compression, and a number of desktop players, like the new MusicMatch Jukebox, are beginning to incorporate it into the suite of codecs they support.
		Codecs are used to encode and decode or compress and decompress data.
	www.geocities.com /columbiaisa/audio_digital_formats.htm (5101 words)

	Apple - QuickTime - Technologies - AAC Audio
		AAC was developed by the MPEG group that includes Dolby, Fraunhofer (FhG), ATandT, Sony and Nokia—companies that have also been involved in the development of audio codecs such as MP3 and AC3 (also known as Dolby Digital).
		AAC has also been adopted by the major standards organizations including the ISO MPEG (MPEG-4), 3GPP and 3GPP2, DVB, as well as XM satellite radio.
		AAC compressed audio at 96 Kbps generally exceeded the quality of MP3 compressed audio at 128 Kbps.
	www.apple.com /quicktime/technologies/aac (408 words)

	MP3 - Comprehensive Glossary - Part I
		Audio or video data that can be heard or viewed as it is being transmitted.
		Audio sampled at a sampling rate of 44.1kHz and a sampling precision of 16 bits.
		CD-quality audio is considered perfect human hearing because the amount of information it provides is enough that most people cannot hear anything missing from the audio.
	www.suite101.com /article.cfm/mp3_music_net/89558 (390 words)

	MPEG-4 AAC Standard (Site not responding. Last check: 2007-11-01)
		Advanced Audio Coding (AAC) is a wideband audio coding algorithm that exploits two primary coding strategies to dramatically reduce the amount of data needed to convey high-quality digital audio.
		Efficient audio compression is achieved by a variety of perceptual audio coding and data compression tools, which are combined in the MPEG-4 AAC specification.
		The MPEG-4 AAC standard incorporates MPEG-2 AAC, forming the basis of the MPEG-4 audio compression technology for data rates above 32 kbps per channel.
	www.vialicensing.com /products/mpeg4aac/standard.html (185 words)

	TechSmith Screen Capture Codec (TSCC)
		Codecs are applied to audio, video and image files to compress their size.
		So, the video codec is responsible for compressing the video frames during recording and for reconstructing the video frames during playback.
		Even codecs that are more widely distributed do not perform as well as the TechSmith codec to deliver the highest quality, smallest file size and fastest compression speed.
	www.techsmith.com /codecs/tscc/default.asp (639 words)

	Glossary of Digital Audio-Video Terms
		Audio in an analog electrical signal is represented by the varying of a voltage's rate of change (frequency) and strength (amplitude) to correspond to how the audio changes in frequency and volume.
		DTS audio, as used in DVD-Video and CDs, is compressed approximately 3:1 from PCM recorded with a sampling frequency of 96 kHz and a 20-bit sampling size.
		PCM samples analog audio information at a fixed sampling rate and measures the amplitude (volume) of the audio signal with a precision determined by the sampling size.
	users.ameritech.net /mrudas/glossary.html (3275 words)

	TELOS SYSTEMS DEMONSTRATES WORLD'S FIRST MPEG-AAC ENCODER AT NAB (Site not responding. Last check: 2007-11-01)
		This is the first encoder to use the most advanced audio codec technology endorsed by MPEG, the international body that develops standards for digital audio and video compression.
		AAC encoding and decoding plug-in cards for PCs, and PC software-based decoders are also in the works.
		AAC is a joint development of the Fraunhofer Institute IIS, ATandT, Sony, and Dolby Laboratories.
	www.audioactive.com /intro/press/aac499.html (593 words)

	FileForum \| K-Lite Codec Pack Full
		Codecs are needed for encoding and decoding (playing) audio and video.
		The problem with not using a codec pack, in my experience, is you will occasionally run into a file that just won't play.
		Players like VLC (for video) and Foobar (audio) can play files without the need for a codec pack and if they dont it is very easy to identify what it wont and find the file to make it.
	fileforum.betanews.com /detail/KLite_Codec_Pack_Full/1094057842/3 (608 words)

	IGM: AAC Audio: DVD Forum Formally Approves Apple's iTunes Codec
		The Register reports that although AAC got the virtual green light last March, formal approval had to wait the decision of the DVD Forum's Steering Committee.
		AAC is a subset of MPEG-4, itself based upon Apple's QuickTime file format.
		So it's true that Apple uses a semi-proprietary mix of AAC and DRM for songs it sells, but saying that is the only format it uses (or is capable of using) is a bit of a stretch.
	www.insanely-great.com /news.php?id=3487 (779 words)

	Digital audio player - WebArticles.com
		Rio CarbonThe first digital audio player on the American market was the Eiger Labs MPMan F10, a 32MB portable that appeared in the summer of 1998.
		Generally speaking, digital audio players are portable, employing internal or replaceable batteries and headphones, although users often connect players to car and home stereos â” sometimes via a wireless connection â” thereby turning them into portable jukeboxes.
		Devices such as CD players can be connected to digital audio players (using the USB port) in order to directly play music from the memory of the player without the use of a computer.
	www.webarticles.com /print.php?id=496 (953 words)

	AACelerator - Acelerating MPEG-4 Audio for Mac OS X
		AAC files encoded with AACelerator version 1.0 may at first appear to be incompatible with an AAC enabled iPod.
		AACelerator is the quickest way to easily encode all of your audio files into MPEG-4 Advanced Audio Codec (AAC) audio files.
		By all accounts, audio encoded at the same bit rates as MP3 files will result in audio files with superior sonic quality.
	www.macmethod.com /AACelerator.php (287 words)

	IGM: AACelerator: MP3s are just so passé
		MacMethod has announced AACelerator, which the company bills as "the quickest way to easily encode all of your audio files into MPEG-4 Advanced Audio Codec (AAC) audio files." This new encoding format included in QuickTime 6 allows users to create high-quality digital copies that are much smaller than comparable quality mp3s.
		The mothership also has an AAC audio gallery with four tunes encoded at 40 and 128K using this cutting-edge codec.
		As a high quality video codec with sound it will do well regardless of the audio capabilities because the file size speed of download and quality of output will drive the video streaming area.
	www.insanely-great.com /news.php?id=1841 (587 words)

	Broadcom Corporation - Audio Codecs
		Audio codecs are licensed in bundles in the same way as video codecs.
		AAC improves upon MP3 by using better filtering methods, noise shaping and quantization resolution to produce higher quality audio files at lower bit rates.
		The AMR codec is designed with a voice activity detector (VAD) and generation of comfort noise (CNG) parameters to reduce the number of transmitted bits and packets during silence periods.
	www.broadcom.com /products/software/mobmm_audiocodecs.php (1446 words)

	Macworld: News: Audio Hijack Pro to include AAC, Apple Lossless encoding
		Audio Hijack Pro 2 will also be able to tag audio files with ID3 content.
		Users who bought Audio Hijack Pro 1 after May 1, 2004 will be eligible for a free upgrade.
		In related news, Rogue Amoeba has updated its Internet audio broadcast utility Nicecast to v1.5.5, improving compatibility with iTunes 4.5 and enabling the software to receive track information from TitleTrack Jukebox.
	www.macworld.com /news/2004/05/19/hijack/?pf=1 (156 words)

	Ripping Analog Audio on a Macintosh
		The process of converting an analog audio source (cassette, LP or other source) is actually pretty simple.
		AAC (Advanced Audio Codec) is the sound format for MPEG4 format movies.
		Use the male to male audio cable to connect the headphone output of your audio source to whatever line-in jack that you have selected in the Sound preferences.
	www.girr.org /mac_stuff/audio_rip.html (2959 words)

	dBpowerAMP
		There are two types of compression: Lossy where audio quality is lost (and is lost forever when compressed) in order to have smaller audio files and Lossless where no audio quality is lost (just like zip compression).
		Spoon's Audio Guide for details and help choosing the right audio codec to suit your needs.
		In addition there are Utility Codecs which perform useful actions on existing audio files (such as rename based upon ID Tag).
	www.dbpoweramp.com /codec-central.htm (300 words)

	PC World - Audio Player Makes Fashion Statement
		Cell phones, beware: Digital audio players might soon become the hottest high-tech fashion accessories on the streets of Tokyo, as Panasonic follows Sony's lead and unveils a player that begs to be shown off.
		Not much larger than a conventional pair of headphones and weighing just 104 grams, the digital audio player is built in to a headset unit for totally portable audio.
		AAC is a high-quality audio compression system being employed in Japan for audio distribution and digital satellite broadcasting.
	www.pcworld.com /news/article/0,aid,17013,00.asp (640 words)

	Liquid Audio: Company: Press Room: Liquid Notes (Site not responding. Last check: 2007-11-01)
		Of course, we prefer to encode using the Liquid Audio format with the AAC codec and associated Liquid Player.
		We prefer to use AAC (Advanced Audio Codec), because it provides a much cleaner, truer-to-the-master sound quality than a MP3-encoded file.
		Once Liquid Tracks are created, a team of professionals, including audio engineers, musicians and IT professionals, QA the audio, using professional grade listening hardware and software.
	www.liquidaudio.com /company/press/liquid_notes/feb2001/2.asp (1135 words)

	Audio Codec Software: Active Audio Record Component, J2K-Codec, Codec Pack - Advanced, ...
		Directly record audio to wav, mp3, wma, ogg, vox, au, aiff, mp4 and flac format on the fly without temporary files created.
		The Cole2k Media Advanced Codec Pack features a collection of codecs and filters for encoding/decoding a large variety of video/audio formats.
		By using the open source Speex audio codec the audio quality is far higher than any normal telephone call.
	www.criticalfiles.com /free/audio-codec (753 words)

	Dolby Laboratories Showcases Advanced Technologies at CES 2005 (Site not responding. Last check: 2007-11-01)
		To underscore Dolby's focus on advancing entertainment through innovation, the Dolby exhibit will feature a new booth layout that illustrates how Dolby(R) technologies impact the entertainment experience in real-life environments such as the living room, game room, media room, and in the car.
		Dolby's advanced audio technologies are featured in a wide range of products from the consumer electronics, personal computing, automobile, and game industries.
		Dolby Digital Plus is an advanced, highly sophisticated and versatile audio codec that promises to significantly improve the home entertainment experience.
	www.audioholics.com /news/pressreleases/Dolbylabs.php (939 words)

	Nero codec - Hydrogenaudio Forums
		May I know what is the difference between LE low complexity and HE high efficiency.
		You mean the ''Advanced Audio Codec'' that uses the CLI extention.
		I've encoded an audio track and encoded it in 2channel, encoded the same track using wav and reulted in 5 channels instead.
	www.hydrogenaudio.org /forums/index.php?showtopic=29053 (282 words)

	Audio: News Items From the world of Professional Audio
		New York City (March 19, 2003)--On June 26, the Audio Engineering Society (AES) will kick off three days of intensive presentations and discussions on the present and future of multichannel audio at its 24th International Conference.
		San Francisco (March 19, 2003)--Dolby Laboratories and Texas Instruments (TI) have jointly sponsored the design and development of a device that allows consumers to easily connect PCs with 1394 connectors to their home theater systems.
		9:17:58 PM AACelerator 1.0 encodes audio files into MPEG-4 Advanced Audio Codec (AAC) audio files using QuickTime 6 Pro (which is required).
	homepage.mac.com /petercook/weblog/audio/2003/03/18.html (273 words)

	new acc player (ipod compatible) - Hydrogenaudio Forums (Site not responding. Last check: 2007-11-01)
		This article talks about new player which uses AAC format and compatible with iPod.
		The article says it encodes using AAC format.
		Wake me up when they make one that doesn't use flash memory (64MB is pretty useless to me), and that I can buy here in the states.
	www.hydrogenaudio.org /forums/index.php?showtopic=15540 (304 words)

	iVisit, BoxTop Interactive's breakthrough video chat software, licenses Lucent Technologies' audio codec to ... (Site not responding. Last check: 2007-11-01)
		LOS ANGELES -- (Editor's Note: This release was issued by BoxTop Interactive) BoxTop Interactive (http://www.boxtop.com), the creator of iVisit, the cutting-edge advance in multi-party desktop video chat, has announced a licensing deal with Lucent Technologies (NYSE: LU) that includes the use of the most advanced audio codec in the industry.
		A highly advanced speech coder, the SX8300P provides quality speech at the rate of 8.3 kbit/s making it an ideal coder for Internet applications.
		The number of users who can be involved in a simultaneous conference is limited only by the capacity of the network connection, the speed of the computer, the type of media being exchanged (video, audio, text) and the number of video windows that will fit on the computer screen.
	www.lucent.com /press/0997/970902.bla.html (751 words)

	3ivx D4 4.5 - Glossary of Audio and Video Terms
		Microsoft WAVE format, the primary audio format in Windows, normally contains uncompressed PCM audio at various depths and sampling rates, but can also use more advanced codecs (such as MP3).
		Apple's Audio Interchange File Format, normally used for uncompressed PCM audio at various depths and sampling rates, or simpler audio codecs (ie MACE6:1).
		The container is actually ASF, the audio codec is Microsoft's attempt at high compression audio.
	www.3ivx.com /support/video_glossary.html (437 words)

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