Audio codec integrates single microphone noise/echo cancellation
January 04, 2013 // Julien Happich
The TC94B24WBG audio codec from Toshiba Electronics Europe is a highly integrated single microphone noise cancellation (NC) and echo cancellation (EC) solution for high-quality voice on smartphones and portable devices.
The TC94B24WBG is claimed to offer design flexibility, performance, and cost benefits so OEMs can better address challenges associated with multiple microphone audio processing. Besides processing the NC/EC algorithms, the high-performance, low-power general-purpose programmable DSP in the TC94B24WBG allows customers to implement their own software in the audio codec. This helps differentiate their products from the competition. Additionally, the highly integrated TC94B24WBG includes: a 2-channel AECM interface; a 4-channel DECM interface; a battery-conserving class-G headphone amplifier; ear speaker amplifier; asynchronous sampling rate converter; a 4-channel I2S interface; an I2C/SPI interface; and audio post processing (equalizer, dynamic range controller). It provides all of the audio inputs and outputs required by mobile and telephony products.
The device interfaces with the audio I/O and the application processor in smartphones and tablets. The TC94B24WBG comes equipped with two analogue and four digital microphone inputs to suit various customers' needs. However, Toshiba’s unique audio processing algorithm needs just one analogue microphone to efficiently provide NC and EC simultaneously. Outstanding noise cancellation on the TC94B24WBG is achieved through a Toshiba proprietary one microphone algorithm. The algorithm distinguishes voice and noise with statistical noise estimation while Toshiba’s improved minimum mean square error method in frequency-domain removes noise only and keeps the voice natural. The excellent echo cancellation algorithm has a time-domain echo cancelling adaptive filter and frequency-domain echo suppression. The former removes linear echo, the later suppresses the rest of non-linear echo. These two main processes work together closely and intelligently to achieve high quality echo cancellation by the same microphone used for the noise cancellation.
Visit Toshiba at www.toshiba-components.comAll news
Delayed roadmap set for debut at TSensors Summit
November 27, 2015
The MEMS and Sensors Industry Group has announced that it will release the outline of the TSensors (Trillion Sensors) Roadmap ...
Tower buys Maxim's Texas wafer fab
Deterministic motor control with FPGAs
Smart buildings, smartphones will drive IR detector market
Private ID as a service leverages smartphone-enabled biometrics
Like Micron, SK Hynix rejects Chinese advances
November 26, 2015
Korean memory chip company SK Hynix has rejected an investment offer from China's state-backed Tsinghua Unigroup, according ...
NXP, Freescale merger clears FTC hurdle
Thin film micro-lenses stretch to focus
German battery maker puts squeeze on Tesla's solar storage plans
- Battery Size Matters
- Software-Defined Radio Handbook - 11th edition
- Multichemistry Buck Battery Charger Controller
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
InterviewCEO interview: InvenSense's Abdi on expanding MEMS horizons
InvenSense Inc. is a MEMS company that has epitomized a fabless approach to a sector that is still highly reliant on a thorough grasp of the manufacturing and packaging processes. We interviewed CEO Behrooz ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, FTDI Chip is giving away six MCU development board packages complete with a dedicated compiler (including a full integrated development environment).
Worth Euro 315 each, the packages include a credit card sized Clicker 2 board for the FT90X 32-bit MCU supplied alongside a powerful dedicated compiler from MikroElektronika.
MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.