Realtek Shows off New High Definition Audio Codecs
Anh Tuan Huynh
April 20, 2006 10:43 AM
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High Definition audio codecs with support for DRM protected HD content playback
Realtek has been showing off its three newest high definition audio codecs at the Intel Developer Forum in Taiwan. The new codecs dubbed ALC885, ALC888 and ALC888 Telecom were initially announced March 10th but no working samples were shown at the time. Realtek was demonstrating working samples at the show, though it appears the samples are reference/development boards and not actual products. Nonetheless, the three high definition audio codecs sport a pretty impressive spec sheet.
At the top of the spectrum is the premium ALC885 high definition audio codec which joins Realtek’s previous upper-end ALC882. New features of the ALC885 include support for a digital microphone, an improved ADC that supports 192 kHz sampling rates and a higher DAC signal-to-noise ratio of 106 dB versus the ALC882’s 101 dB. The biggest feature addition is support for DRM protected content playback. Supported protected content include DVD-Audio, Blu-ray, and/or HD-DVD discs. Copy protected content will be capable of being played back at 24-bit resolution and 96 kHz sampling rates.
Existing features of the ALC882 are also integrated into the ALC885. This includes 10 DAC’s for support of 7.1 channel audio as well as a dedicated headphone output, 6 ADC’s for your various microphone, line, and CD inputs, and DAC sampling rates of 44.1/48/96/192 kHz.
The second new codec is the Realtek ALC888 with similar specifications to the previous ALC883 high definition audio codec. Digital microphone support seems to be the only new feature the ALC888 has over the ALC883. Aside from the digital microphone support the ALC888 supports the same specifications as the ALC883.
Lastly is the ALC888 Telecom which is essentially the ALC888 with additional support for VoIP services. VoIP support integrated into the ALC888 Telecom allows Skype or other VoIP service users to connect a standard telephone to their computer and make calls, essentially integrating a VoIP phone adapter like the ones used by Vonage into your PC.
The ALC885 and ALC888 are both pin compatible with existing ALC882, ALC883 and other 48-pin LQFP packaged high definition audio codecs. The ALC888 Telecom however, is not pin-compatible with existing high definition audio equipped motherboards and systems and uses its own 64-pin LQFP packaging.
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4/20/2006 12:47:49 PM
I would have thought that the higher numbers are better products. However it states that the 885 is the best and replaces the 882 which was the previous top model.
Also saying that the 888 replaced the 883, but as I mentioned it says the 885 is at the top of the spectrum.
I mean why do these marketing type people follow the logic of "new generations get higher numbers to signify being of greater power/features/quality/etc" but not the logic of "higher end chips get higher numbers to signify being of greater power/features/quality/etc"?
Thats the same as ATI making the R600 series cards named X2000's but having the X2300 as the top end and the X2900 as the low end.
4/22/2006 2:18:05 AM
These chips would likely be sold to motherboard manufacturers, or at most, system integrators, not the mass public. There is no need for such marketing.
Besides, the number 8 is a lucky number for chinese. They must have figured that 888 might help boost sales. :)
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