Here is a news release that mentions some things of the internals of the cameras, which they says uses a HC3 sensor chip :(.

http://techon.nikkeibp.co.jp/english/NEWS_EN/20060720/119306/

http://techon.nikkeibp.co.jp/english/NEWS_EN/20060720/119306/?SS=imgview_e&FD=-1843757513

http://techon.nikkeibp.co.jp/english/NEWS_EN/20060720/119306/?SS=imgview_e&FD=-1308477976

Seems to indicate that it uses a Sony LSI rather than a Ambarella codec chip I thought it might have. I can't quiet make out the model name and number of the chips in the photograph, probably could with some image restoration techniques.