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
Intel, Micron launch "bulk-switching" ReRAM
July 28, 2015
Intel Corp. and Micron Technology Inc. have launched a new class of non-volatile memory that they have called 3D Xpoint and ...
Demand for radar systems boosts Infineonís chip production
'Test city' opens for autonomous cars
AMS buys environmental sensor business from NXP
World first: Samsung monitor integrates inbuilt wireless charging
Breakthrough for really cost-efficient fuel cells in sight?
July 27, 2015
Researchers from Georgia Institute of Technology have developed a manufacturing technique for platinum nanocages that can ...
Pelican makes lay-offs, refocuses on depth sensing
SK Hynix starts 3D NAND flash production
Analog design and the age of digital correction
- Test environment for the positioning elements of wearable devices
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
- Top 5 Challenges for testing Today's Consumer Electronics
- Critical Requirements in High Speed Signal Generation Applications
InterviewGlobalfoundries' CEO on why FD-SOI and why now
With its latest news Globalfoundries Inc. has not only confirmed itself as a supporter of the fully-depleted silicon-on-insulator (FD-SOI) approach to IC manufacturing but that it also thinks sufficiently ...
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, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... 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.