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İTÜ Ayazağa Kampüsü Koru Yolu ARI-2 Teknokent Binası A Blok A4-4 Maslak-İstanbul

Foundation Year


Number of Employee

37 (R&D: 27, Other: 10)


Prof. M.Levent ARSLAN

Business Area

Software 

Speech Technologies

Communication Technologies

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Sestek Text To Speech Sestek Voice Verification Sestek Speech Analytics Sestek Speech Recognition Sestek Seamless Agent Sestek Outbound IVR

Turkish Speech Technology Market



Sestek 80%

Sestek Other

With its rich product range, pioneer role in the university-industry collaboration, financial power and more than 10 years of experience; Sestek is the leader company of Turkish speech technology market.

Sestek has %30 ranked among the fastest growing technology companies of Deloitte’s Fast50 and Fast500 programs in 2012 for the fifth time consecutively since 2008.


2008 2009 2010


Turkey’s first; 

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Speech recognition implementation Voice enabled telephone banking implementation Voice-operated white goods integration: Arçelik Turkish speaking online newspaper with TTS integration SR-TTS integrated VAS service in Turkey: Turkcell 8080 Finance Line Voice Verification implementation by a native company for GSM operator AVEA

The world’s first; 

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Voice conversion product for commercial use Turkish speaking TTS software for the visually disabled Turkish compatible Speech Analytics software Patented Seamless Agent software that provides 100% accurate speech recognition by combining speech recognition software with hidden agents Most comprehensive content sharing project with natural language processing for the disabled

Sestek has a pioneer role in universityindustry collaboration by transforming academic knowledge to production

Sestek attributes to transformation of theoretical knowledge to practise with the help of its qualified personnel, most of whom own master and PhD degrees.

Thus employees have the opportunity to create products from their theoretical studies in R&D department of Sestek.

With the aim of providing equal opportunities for the disabled, Sestek produces various products and services. TTS solution NetOkur and dictation solution FreeTalk have been used by more than 50.000 visually disabled people in Turkey.

Sestek TTS has been used for speech synthesis implementations in Talking ATM’s. With the help of that implementation, visually disabled people can make banking transactions easily.

ď ś Thousands of visually disabled people benefit from NetOkur Information Platform, which enables users to reach and listen book, magazine and newspaper content via telephone. ď ś With the help of Speech Recognition and Speech Synthesis technologies that are used in the platform, users can dialogue with the system as if they are talking to real people.

Mobile Applications  

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The world’s most qualified Turkish TTS Various language options: Turkish, English, German, Azerbaijani Male and female speaker options for each language Installation of more than 100.000 ports. TTS for the visually disabled: NetOkur Talking ATM implementations for the visually disabled


Android TTS




















Yapı Kredi Bank-Talking ATM Project Yapı Kredi is one of the leading banks of Turkey Problem: Visually disabled people used to have problems with conventional ATMs while making transactions Solution: ATMs began to talk with Sestek TTS integration Result: More than 150 ATMs were transformed to Talking ATMs with Sestek TTS integration 

Akbank Outbound IVR Project Akbank is one of the leading banks of Turkey Problem: Standard salutation and inability to read dynamic information of automated calls used to cause customer dissatisfaction Solution: Sestek TTS was integrated with IVR system (outsource & inhouse) Result:  Personal calls  Raise in answered calls and attendance  Reading dynamic information in IVR systems 

Voice Verification is a biometric speaker verification system that enables securely access to call centers over the phone by creating individual voice prints to authenticate callers by the characteristics of their voices.

Benefits  Improved efficiency with reduced costs that result from shorter handle time and increased automation  Improved customer experience and satisfaction with elimination of time-consuming traditional security measures such as PIN, password and challenge questions  Improved security that results from uniqueness of human voice such as fingerprint and retina which combats fraud and identity theft successfully

 Low false acceptance & false rejection rates  Language independent  Easy integration with IVR platforms, backend enterprise systems and databases

Avea Customer Services Problem: One of the leading GSM operators of Turkey Avea used to apply challenge questions during identity authentication which resulted with increased call duration and customer dissatisfaction. Solution: After Sestek Voice Verification integration identities of customers were authenticated automatically via their voice prints. Result: Approximately 1 million voice print enrollments were realized by the system successfully & 15-second reduction in call durations was observed.

DenizBank Customer Services Problem: One of the leading banks of of Turkey DenizBank used to apply challenge questions during identity authentication which resulted with increased call duration and customer dissatisfaction. Solution: After Sestek Voice Verification integration, identities of customers were authenticated automatically via their voice prints. Result:  First Voice Verification project of Turkish banking industry is realized  Customers easily adopted the new technology  Customer satifaction increased as a result of decreased call duration

Sestek Speech Analytics transcribes the recorded audio to digital text & analyzes customer-agent interactions in call centers based on its SpeechTo-Text and emotion detection technologies and reveals important insights by applying data mining methods.

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Speech-to-Text Transcription Emotion detection Topic identification First Call Resolution Trend analysis Online Coaching Google-like search engine Flexible & customizable structure Easy to use with various templates & charts Evaluation module


Call Center

White Goods


Keyword Spotting in Speech Recordings

Sestek Speech Analytics is patented with the name of Keyword Spotting in Speech Recordings

Garanti Emeklilik Call Center Problem: Increasing capacity of the call center made it difficult to evaluate interactions with manual analyses. Solution: With the integration of Sestek Speech Analytics all call center interactions transcribed to digital text and began to be evaluated with various analysis. Result:  MS CRM integration  Personal agent scorecards  Improved quality control  Personal training programs

Ability to use voice as the main tool for human-machine communication rather than using conventional tools such as keystroke, keyboard..etc

Main technology behind the Speech To Text solutions of Sestek: The Talk Family

Area of use: Contact centers, IVR systems, applications that assist the disabled, mobile and embedded systems

Reduces the duration of the conversations at call centers by eliminating the hierarchy that results from the key driven menu. Enables to make choice in complex scripts that is impossible to build with key driven technology Raise in cost advantage and efficiency with the ability to make transactions easily and rapidly


%30 %70

Calls answered by agents Calls answered by IVR+SR

Sestek Seamless Agent integrates customer representatives with speech recognition software in order to prevent recognition errors and provide accurate transactions. Machine-man collaboration of Sestek Seamless Agent enables the execution of all transactions in an accurate and time conserving manner which provides improved customer services, customer satisfaction and efficiency to corporations.

Operator Supported Speech Recognition Method Seamless Agent is a patented technology of Sestek with the name of OperatorSupported Speech Recognition Method

Reference for SR Telecommunications

Turkish mobile applications for iOS with SR

Reference for Seamless Agent White Goods Vendor



Contact Center