US 7,522,966 B2
Low power digital audio decoding/playing system for computing devices
Sterling Du, Palo Alto, Calif. (US); James Lam, Fremont, Calif. (US); and Bruce Denning, Monterey, Calif. (US)
Assigned to O2Micro International Limited, Grand Cayman (Cayman Islands)
Filed on Oct. 17, 2002, as Appl. No. 10/272,740.
Prior Publication US 2003/0088326 A1, May 08, 2003
Int. Cl. G06F 17/00 (2006.01); G06F 9/00 (2006.01); G06F 15/177 (2006.01); G06F 1/24 (2006.01)
U.S. Cl. 700—94  [713/2; 713/100] 22 Claims
OG exemplary drawing
 
1. A computer system adapted to play at least one audio file, said computer system comprising:
a system CPU responsive to a control signal to load a first operating system or a second operating system, wherein said first operating system is run by said computer system in a first operation mode and said second operating system is run by said computer system in a second audio compression mode, and wherein audio data of said at least one audio file is transferred from a south bridge of said computer system through a first transfer path to an output amplifier if said computer system operates in said first operation mode, and wherein said audio data is transferred from said south bridge through a second transfer path to said output amplifier if said computer system operates in said second audio compression mode; and
at least one function key configured to enable a user to enter a directory mode if said computer system is in said second audio compression mode, wherein said directory mode provides said user access to a directory of said at least one audio file.