# US 12,114,141 B2 · Mobile terminal and control method

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- Number: US 12,114,141 B2
- Document ID: US12114141B2
- Status: Granted
- Kind: B2
- Application number: 17/551,957
- Filed: 2021-12-15
- Published: 2022-04-28
- Granted: 2024-10-08
- Earliest claimed: 2019-06-25
- Assignees: Vivo Mobile Communication Co., Ltd.
- Applicants: Vivo Mobile Communication Co., Ltd.
- Inventors: Mingjun Xu
- Web page: https://patentgrep.com/patent/US12114141B2

## CPC

- H04M 1/6016: {in the receiver circuit}
- H04R 5/04: Circuit arrangements, {e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments (combinations of amplifiers H03F3/68; stereophonic systems H04S)}
- G06F 3/162: {Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs}
- G06F 3/165: {Management of the audio stream, e.g. setting of volume, audio stream path}
- G10L 19/16: Vocoder architecture
- H04M 1/6058: {involving the use of a headset accessory device connected to the portable telephone}
- H04R 5/033: Headphones for stereophonic communication {(details thereof, e.g. relating to batteries, cables or control elements H04R1/10)}
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING

## Abstract

A mobile terminal and a control method are provided. The mobile terminal includes an audio codec and a control chip, where the audio codec has sound channel output pins, the control chip and the audio codec are electrically connected to each other, and the control chip is configured to output a voltage compensating signal to the audio codec in processes of enabling and disabling the audio codec, so that a direct current bias voltage of the sound channel output pins is 0V in the processes of enabling and disabling the audio codec.

## Claims

### Claim 1

A mobile terminal, comprising:
an audio codec, wherein the audio codec has sound channel output pins;
a control chip, wherein the control chip and the audio codec are electrically connected to each other, and the control chip is configured to output a voltage compensating signal to the audio codec in processes of enabling and disabling the audio codec, so that a direct current bias voltage of the sound channel output pins is 0V in the processes of enabling and disabling the audio codec; wherein the control chip is further configured to: in a process of starting the mobile terminal, detect the direct current bias voltage of the sound channel output pins in the processes of enabling and/or disabling the audio codec; and determine a voltage value of the voltage compensating signal based on the detected direct current bias voltage; and
an electronic switch, wherein the electronic switch is electrically connected to the sound channel output pins and the control chip separately; the control chip is specifically configured to: control the sound channel output pins to be electrically connected to a ground terminal through the electronic switch, output the voltage compensating signal to the audio codec in a case in which the sound channel output pins are electrically connected to the ground terminal, and control the sound channel output pins to be disconnected with the ground terminal through the electronic switch after the voltage compensating signal is output to the audio codec.

### Claim 2 (depends on 1)

The mobile terminal according to claim 1, wherein the control chip is electrically connected to the sound channel output pins, and the control chip is specifically configured to: after the process of starting the mobile terminal is completed, control the sound channel output pins to be electrically connected to the ground terminal through the electronic switch in a case in which there is a direct current bias voltage in the sound channel output pins; control the sound channel output pins to be disconnected with the ground terminal through the electronic switch after a preset time, and output the voltage compensating signal to the audio codec in a case in which the sound channel output pins are electrically connected to the ground terminal.

### Claim 3

A control method, applied to a mobile terminal and comprising:
outputting a voltage compensating signal to an audio codec in processes of enabling and disabling the audio codec of the mobile terminal, so that a direct current bias voltage of the sound channel output pins of the audio codec is 0V in the processes of enabling and disabling the audio codec;
wherein before the outputting a voltage compensating signal to an audio codec, the method further comprises:
in a process of starting the mobile terminal, detecting the direct current bias voltage of the sound channel output pins in the processes of enabling and/or disabling the audio codec; and
determining a voltage value of the voltage compensating signal based on the detected direct current bias voltage;
wherein the outputting a voltage compensating signal to an audio codec comprises:
controlling the sound channel output pins to be electrically connected to the ground terminal;
outputting the voltage compensating signal to the audio codec in a case in which the sound channel output pins are electrically connected to the ground terminal;
controlling the sound channel output pins to be disconnected with the ground terminal after the voltage compensating signal is output to the audio codec.

### Claim 4 (depends on 3)

The method according to claim 3, wherein before the controlling the sound channel output pins to be electrically connected to the ground terminal, the method further comprises:
detecting whether there is a direct current bias voltage in the sound channel output pins; controlling the sound channel output pins to be electrically connected to the ground terminal in a case in which a direct current bias voltage is detected in the sound channel output pins.

### Claim 5

A mobile terminal, comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the control method are implemented, wherein the method comprises:
outputting a voltage compensating signal to an audio codec in processes of enabling and disabling the audio codec of the mobile terminal, so that a direct current bias voltage of the sound channel output pins of the audio codec is 0V in the processes of enabling and disabling the audio codec;
wherein when the program is executed by the processor, the processor further implements, before the outputting a voltage compensating signal to an audio codec, in a process of starting the mobile terminal, detecting the direct current bias voltage of the sound channel output pins in the processes of enabling and/or disabling the audio codec; and
determining a voltage value of the voltage compensating signal based on the detected direct current bias voltage;
wherein the outputting a voltage compensating signal to an audio codec comprises:
controlling the sound channel output pins to be electrically connected to the ground terminal;
outputting the voltage compensating signal to the audio codec in a case in which the sound channel output pins are electrically connected to the ground terminal;
controlling the sound channel output pins to be disconnected with the ground terminal after the voltage compensating signal is output to the audio codec.

### Claim 6 (depends on 5)

The mobile terminal according to claim 5, wherein when the program is executed by the processor, the processor further implements, before the controlling the sound channel output pins to be electrically connected to the ground terminal, detecting whether there is a direct current bias voltage in the sound channel output pins; controlling the sound channel output pins to be electrically connected to the ground terminal in a case in which a direct current bias voltage is detected in the sound channel output pins.

### Claim 7 (depends on 3)

A non-transitory readable storage medium, wherein the readable storage medium stores a program, and when the program is executed by a processor, the steps of the control method according to claim 3 are implemented.