US 11,929,722 B2 · Audio control circuit and associated control method

Abstract

The present invention provides an audio control circuit comprising an USB interface and a processing circuit is disclosed. The USB interface is used to connect to a host device, and the processing circuit is configured to perform enumeration with the host device via the USB interface, and the processing circuit is further configured to determine if the host device operates in a BIOS stage or an operating system stage to generate a control signal according to packets of the enumeration. When the processing circuit determines that the host device operates in the BIOS stage, the processing circuit generates the control signal to enable a de-pop circuit; and when the processing circuit determines that the host device operates in the operating system stage, the processing circuit generates the control signal to disable the de-pop circuit.

Claims10

Dependent claims

An audio control circuit, comprising:

an universal serial bus (USB) interface circuit, arranged to connect to a host device;
and
a processing circuit, coupled to the USB interface circuit, configured to perform an enumeration process with the host device via the USB interface circuit, and to determine if the host device is operating in a BIOS stage or an operating system stage to generate a control signal according to contents of packets during the enumeration process, wherein the BIOS stage indicates that the host device has not completed operations of recognizing a type of the audio control circuit;
wherein when the processing circuit determines that the host device operates in the BIOS stage, the processing circuit generates the control signal to enable a de-pop circuit;
and when the processing circuit determines that the host device operates in the operating system stage, the processing circuit generates the control signal to disable the de-pop circuit.

2 more elements

A control method of an audio control circuit, comprising:

performing an enumeration process with a host device through an universal serial bus (USB) interface circuit;
determining whether the host device is operating in a BIOS stage or an operating system stage according to contents of packets during the enumeration process, wherein the BIOS stage indicates that the host device has not completed operations of recognizing a type of the audio control circuit;
when it is determined that the host device is operating in the BIOS stage, generating a control signal to enable a de-pop circuit;
and
when it is determined that the host device is operating in the operating system stage, generating the control signal to disable the de-pop circuit.

2 more elements

Dependencies are inferred from the claim text.

Audio control circuit and associated control method

Life of this patent

Audio control circuit and associated control method

Life of this patent

Abstract

Claims10