Say goodbye to low quality audio o­n video cameras and voice recorders. Oki is introducing an LSI which allows for audio recording/playback at essentially the same quality as CDs.

Oki Electric Industry Corporation will begin sample shipments in June of the "ML2308," a o­ne-chip digital amplifier LSI which drive microphone amps, headphones, speakers, etc.. Large volume shipment is scheduled to begin in September, and the sample price is 1,000 yen [1]. They are aiming for a monthly production of 300,000 chips.

The MC2308 is a LSI assumed to be inserted in digital video cameras, voice recorders, etc. It features a 1bitΔΣ AD/DA convertor, which is said to allow for recording/playback of audio quality similar to that of a CD.

Furthermore, the LSI also supports an ADPCM compression format specially developed by ADPCM, as well as μ-Law PCM, a format included standard with Windows. It is also suitable for recording/playback for long periods of time. The signal/noise ratio during recording/playback is 88dB. When used as a digital amplifier in headphone and speaker's drive devices, it has an output power efficiency of 80% - more than twice of previous models.

Also included are command functions such as fast and slow play. The package is a 48-pin QFN, and the package size is 7.2mm x 7.2mm (H x W).

Furthermore, the audio signal processing part and speaker driving digital amp parts developed for the ML2308 are, as a function module for the LSI's IP, planned o­n supporting functions included for ASIC.



Inspired by:
http://www.watch.impress.co.jp/av/docs/20040423/oki.htm [2]

Press Release:
http://www.oki.com/jp/Home/JIS/New/OKI-News/2004/04/z04009.html [3]