Chipset Solves Problems Of Noisy Phone Calls In Cars


Echoes and other background sounds such as road noise from fans,  windows, or other passengers talking in cars can make calls unclear. In order to tackle echo and noise problems in vehicles, NXP has announced a new echo cancellation noise reduction chipset (ECNR) that claims to significantly reduce the problem of noisy voice communications and provides carmakers with a hands-free calling experience.

The cost-effective solution combines innovative ECNR software that can be easily ported onto NXP i.MX processors and NXP’s car radio tuners and DSPs.

Since the ECNR solution can be ported to NXP chipsets and is ITU-T P1110 and CarPlay pre-certified, it can reduce carmakers’ R&D expenses and speed up the design cycle.


The new NXP ECNR solution removes echoes and filters out unwanted noise from the cockpit to enhance the sound quality of conversations.

“Echo occurs when the speakers within a car transmit a voice signal from an incoming call, which subsequently ricochets through the vehicle and returns to the microphone. This causes the caller to hear their own voice, which is distracting and can result in broken communications. Additionally, road noise from fans, exhaust, tires, windows and passengers can infiltrate calls”, explained NXP.

“The NXP ECNR software has been deployed worldwide in more than a billion phones 2 and we want to deliver this leading3 market-proven technology to our automotive customers,” said Alexandre Henon, marketing director of audio solutions at NXP. “We adapted our ECNR to automotive requirements and ported the software on two NXP chipset families to provide NXP customers with an easy to implement, high-performance and architecturally flexible solution depending on where they want to run the ECNR function.”

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