# US 2021/0243582 A1 · Main unit, system and method for an infotainment system of a vehicle

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- Number: US 2021/0243582 A1
- Document ID: US20210243582A1
- Status: Published application
- Kind: A1
- Application number: 17/049,205
- Filed: 2019-03-04
- Published: 2021-08-05
- Earliest claimed: 2018-04-25
- Assignees: Audi AG
- Applicants: Audi AG
- Inventors: Enrico GAHNER
- Web page: https://patentgrep.com/patent/US20210243582A1

## CPC

- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 76/15: Setup of multiple wireless link connections
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present disclosure relates to a head unit for an infotainment system of a vehicle. The head unit is coupled to a mobile terminal device via a Bluetooth link. The head unit is configured to exchange a digital audio signal adapted for improved audio quality during the hands-free talking, via an additional wireless link, in response to hands-free talking during a phone call with the mobile terminal device coupled via the Bluetooth link based on a hands-free profile.

## Claims

### Claim at position 1

-10. (canceled)

### Claim 11

A head unit for an infotainment system of a vehicle, wherein the head unit is coupled to a mobile terminal device via a Bluetooth link, the head unit being configured to:
in response to hands-free talking during a phone call with the mobile terminal device coupled via the Bluetooth link based on a hands-free profile, exchange a digital audio signal adapted for improved audio quality during the hands-free talking, via an additional wireless link.

### Claim 12 (depends on 11)

The head unit of claim 11, further comprising a radio module configured to create the additional wireless link.

### Claim 13 (depends on 12)

The head unit of claim 12, wherein the additional wireless link is a WiFi link and the radio module is a wireless local area network (WLAN) module.

### Claim 14 (depends on 12)

The head unit of claim 12, wherein the additional wireless link is a mobile radio link and the radio module is an internal mobile radio module.

### Claim 15 (depends on 11)

The head unit of claim 11, further comprising:
an amplifier module configured for amplifying an analog audio signal;
an audio signal processing module configured for processing the analog audio signal for converting into a digital audio signal and vice versa; and
an audio control module configured for controlling the audio signal processing module.

### Claim 16 (depends on 11)

The head unit of claim 11, wherein the digital audio signal has a sampling frequency higher than 16 kilohertz (kHz).

### Claim 17 (depends on 16)

The head unit of claim 16, wherein the sampling frequency is at least 44 kHz.

### Claim 18

A system comprising:
a mobile terminal device; and
a head unit, wherein the head unit is configured to:
in response to hands-free talking during a phone call with the mobile terminal device coupled via the Bluetooth link based on a hands-free profile, exchange a digital audio signal adapted for improved audio quality during the hands-free talking, via an additional wireless link.

### Claim 19 (depends on 18)

The system of claim 18, wherein the digital audio signal has a sampling frequency higher than 16 kilohertz (kHz).

### Claim 20 (depends on 19)

The system of claim 19, wherein the sampling frequency is at least 44 kHz.

### Claim 21 (depends on 18)

The system of claim 18, wherein the mobile terminal device is a mobile phone.

### Claim 22 (depends on 21)

The system of claim 21, wherein the mobile phone is a smartphone or a tablet.

### Claim 23

A method for exchanging a digital audio signal between a mobile terminal device and a head unit of an infotainment system of a vehicle, the method comprising:
coupling the mobile terminal device and the head unit via a Bluetooth link based on a hands-free profile; and
exchanging a digital audio signal adapted for improved audio quality during hands-free talking via an additional wireless link in response to the hands-free talking during a phone call with the mobile terminal device using the Bluetooth link.

### Claim 24 (depends on 23)

The method of claim 23, further comprising creating the additional wireless link as a WiFi link using a wireless local area network (WLAN) module.

### Claim 25 (depends on 23)

The method of claim 23, further comprising creating the additional wireless link as a mobile radio link using an internal mobile radio module.

### Claim 26 (depends on 23)

The method of claim 23, wherein the digital audio signal has a sampling frequency higher than 16 kilohertz (kHz).

### Claim 27 (depends on 26)

The method of claim 26, wherein the sampling frequency is at least 44 kHz.