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an AC'97 digital controller (DC97), which is typically built into the southbridge of the chipset, and; an AC'97 audio and/or modem codec, available from several vendors, which contains the analog components of the architecture. AC'97 defines a high-quality, 16- or 24-bit audio architecture with 5.1 surround sound support for the PC.
Notable Realtek products include 10/100M Ethernet controllers (with a global market share of 70% as of 2003) and audio codecs (AC'97 and Intel HD Audio), where Realtek had a 50% market share in 2003 and a 60% market share in 2004, primarily concentrated in the integrated OEM on-board audio market-segment. [7]
Realtek ALC 882 HD Audio Codec. Intel High Definition Audio (IHDA) (also called HD Audio or development codename Azalia) is a specification for the audio sub-system of personal computers. It was released by Intel in 2004 as the successor to their AC'97 PC audio standard. [1]
SigmaTel's AC'97 audio codec chip. SigmaTel, Inc., was an American system-on-a-chip (SoC), electronics and software company headquartered in Austin, Texas, that designed AV media player/recorder SoCs, reference circuit boards, SoC software development kit reference designs used to make media players for Apple iPod Shuffle, Samsung, Sony Walkman and 150 others built around a custom cooperative ...
The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint.
Hardware audio codecs send and receive digital data using buses such as AC-Link, I²S, SPI, I²C, SoundWire, etc. Most commonly the digital data is linear PCM , and this is the only format that most codecs support, but some legacy codecs support other formats such as G.711 for telephony.
However, these features were dropped when AC'97 was superseded by Intel's HD Audio standard, which was released in 2004, again specified the use of a codec chip, and slowly gained acceptance. As of 2011, most motherboards have returned to using a codec chip, albeit an HD Audio compatible one, and the requirement for Sound Blaster compatibility ...
Three classes of audio devices are supported by default: USB, IEEE 1394 , and Intel High Definition Audio, which supports PCI and PCI Express. Starting with Windows Vista, Microsoft requires all computer and audio device manufacturers to support Universal Audio Architecture in order to pass Windows Logo certification.
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