Low power digital audio decoding/playing system for computing devices

• US 7,890,741 B2
• Filed: 04/03/2003
• Issued: 02/15/2011
• Est. Priority Date: 12/01/2000
• Status: Expired due to Fees

• Current Assignee: Maishi Electronic (Shanghai) Limited
• Original Assignee: O2 Micro International Limited (O2 Micro Incorporated)
• Inventors: Du, Sterling, Lam, James, Denning, Bruce
• Primary Examiner(s): Bae, Ji H
• Application Number:
  US10/406,949
• Publication Number:
  US 20040006690A1
• Time in Patent Office: 2,875 Days
• Field of Search: 719/327, 709/208, 709/223, 709/224, 713/1, 713/2, 713/100
• US Class Current: 713/1
• CPC Class Codes: G06F 3/16 Sound input; Sound output speech processing G10L
• CPC Class Codes: G06F 9/441 Multiboot arrangements, i.e. selecting an operating system to be loaded

Abstract

A computer system includes a system CPU responsive to a control signal to load a first operating system or a second operating system. The first operating system is run by the computer system in a first operation mode and the second operating system is run by the computer system in a second entertainment mode. A PC operating in an entertainment mode may operate a variety of entertainment software applications. A quick boot process is also provided. The quick boot process may include an accelerated BIOS boot process that defers and delays appropriate tasks. The quick boot process may also include: detecting a condition; performing a BIOS boot process; loading an image file associated with the condition; and executing the image file associated with the condition. The condition may be that associated hardware is unchanged from a previous boot. A parental control system is also disclosed.

Claims

1. A method of operating a PC, said method comprising:

detecting a condition which indicates whether a hardware configuration change from a previous boot occurs;

performing a BIOS boot process;

loading an image file according to said condition;

executing said image file;

generating a second image file to be utilized in a subsequent boot if said condition indicates that said hardware configuration change from said previous boot occurs;

operating said PC in an entertainment mode by a mini-OS (operating system);

receiving at least one control command from a system memory in said entertainment mode by a special purpose circuit coupled between a south bridge and a codec; and

transferring audio data according to said at least one control command if said PC operates in said entertainment mode.

2. The method of claim 1, wherein said image file comprises a supported hardware configuration.

3. The method of claim 1, wherein said BIOS boot process comprises:

identifying a task that may be skipped; and

skipping said task.

4. The method of claim 3, wherein said task comprises a hardware check.

5. The method of claim 3, wherein said BIOS boot process further comprises:

identifying a deferrable task that may be deferred; and

deferring said deferrable task to a later time.

6. The method of claim 5, wherein said deferrable task comprises reading data from a disk after said disk is spun up.

7. The method as claimed in claim 1, wherein said PC in said entertainment mode operates entertainment software applications selected from the group consisting of DVD playback applications, TV applications, digital device applications, remote control application, voice recording applications, and audio playback applications.

8. A method of operating a mini-OS configured to run a PC in an entertainment mode, said method comprising:

determining whether said entertainment mode is desired;

detecting a condition which indicates whether a present hardware configuration in a present entertainment mode boot differs from a previous hardware configuration in a previous entertainment mode boot;

performing a BIOS boot process;

loading an image file according to said detected condition;

executing said image file thereby loading said mini-OS to enable operation of said PC in said entertainment mode;

receiving at least one control command from a system memory in said entertainment mode by a special purpose circuit coupled between a south bridge and a codec; and

transferring audio data according to said at least one control command if said PC operates in said entertainment mode.

9. The method of claim 8, wherein said image file comprises a supported hardware configuration.

10. The method of claim 8, wherein said BIOS boot process comprises:

identifying a task that may be skipped; and

skipping said task.

11. The method of claim 10, wherein said task comprises a hardware check for a piece of hardware not necessary for operation of said PC in said entertainment mode.

12. The method of claim 10, wherein said task comprises a memory test.

13. The method of claim 10, wherein said BIOS boot process further comprises:

identifying a deferrable task that may be deferred; and

deferring said deferrable task to a later time.

14. The method of claim 8, wherein said PC in said entertainment mode operates entertainment software applications selected from the group consisting of DVD playback applications, TV applications, digital device applications, remote control application, voice recording applications, and audio playback applications.