Zarlink introduced hands-free communication devices for voice processing chips

Zarlink Semiconductor today introduced the first hands-free communication devices designed to improve voice quality and XCS20-3TQ144C datasheet and reduce noise in voice processing chips. Has been a leading manufacturer in its hands-free car phone system, some using Zarlinks acoustic echo cancellation technology. ZL ? 38002 of the Echo (acoustic echo) canceller with enhanced noise reduction features for hands-free communication provides excellent sound quality, applications including car kits, speaker phones, security and XCS20-3TQ144C price and intercom systems.

For higher quality hands-free voice technology needs are constantly growing, especially in government legislation prohibits the use of handheld cell phones while driving is to further stimulate the demand. Most European countries have requirements for drivers to use hands-free car kit or installed equipment. Other parts of the world have already adopted or are considering similar laws.

Hands-free technology for a wide range of communications systems is a key requirement, such as security networks, computer telephony, telephone conferences and XCS20-3TQ144C suppliers and PDA (personal digital assistant) and so on. Hands-free voice technology in access control systems, elevator systems and voice intercom system, hotel parking is also increasingly popular.

"Poor voice quality is seriously lagging behind the hands-free communication in cars, meeting rooms and other locations in the application, background noise and echo to the sound quality deterioration," Voice Processing, Zarlink Semiconductor marketing manager Andre Coucopoulos, "specifically for hands-free communications ZL38002 voice processing chip optimized for telecom applications based on the deployment of the algorithm has been verified. In these applications, telecommunications, voice quality is used as an absolute requirement to ensure high noise case for natural voice conversation. "

Hands-free voice to overcome the challenges

Hands-free communication systems are often plagued by the acoustic echo. For example, when the voice from the car kit speaker or conference call is issued, it will be a microphone to receive and re-forwarding. Mobile network delays also make acoustic echo more noticeable.

To solve these problems, hands-free system previously used to support half-duplex communication only low performance voice processing technology. Half-duplex means that each time only one person talks, so talk twisted way, it is not convenient to use.

Contrast, ZL38002 product uses an advanced adaptive algorithm, sustainable track and reduce background noise, so as to maintain high voice quality. Voice signals are transmitted, allowing natural two-way conversation, even if the signal level is low, no problem. ZL38002 chip uses advanced non-linear process design supporting full-duplex speech with no switched loss signal path. Zarlinks algorithm in the case of a call-talk function.

Advanced algorithms in noisy environments

Also receive hands-free system microphone background noise, such as automotive engine acceleration and tire noise, the noise will further deteriorate voice quality. Zarlinks acoustic echo cancellation technology specifically for the high background noise environments to provide superior performance.

Programmable noise reduction allows the user to adjust the noise reduction level to the audio signal without causing distortion of the case to meet the system requirements. ZL38002 acoustic echo canceller integrates other advanced features to ensure high sound quality, including anti-howling detection feature, which identifies instability in the audio path and automatically take preventive measures to avoid oscillation.

Availability, packaging and pricing

ZL38002 acoustic echo canceller, a series of products among the first product, the product will provide excellent hands-free communication tool for voice quality and higher levels of integration.

ZL38002 device is now available in 36-pin QSOP and 48-pin TQFP chip, measuring just 7mmx7 mm. Lead-free package also available. Chip with an evaluation board, hands-free car kit application board and API software full support. One thousand quantities, the device is priced at $ 5.50.