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Blog / We Do /  Building Voice Recognition Software App

February 1, 2017 - Tetyana

Building Voice Recognition Software App

Studies on human speech recognition have evolved since the mid of 20th century. The 1990s witnessed advent of the huge speech recognition companies, that created such projects as the Sphinx-II system, Dragon Dictate and VAL. Today, anyone can try out voice recognition technologies, as they function in almost every sphere of our life, ranging from common digital assistants to biometric authentication techniques in banking and to speech recognizers built into the weaponry in the military forces. Among the latest well-known voice recognition products for daily usage are assistant Siri for iPhone owners, smart speaker Alexa or Amazon Echo developed by Amazon.com, voice biometrics by Nuance and Google Voice Search.

famous voice recognition applications

Development of voice and speech recognition technologies

Speaker-Dependent Voice Recognition Applications

There are currently two approaches to building speech or voice recognition applications and systems. The first one so-called template matching approach results in delivery of speaker-dependent systems. Such systems can recognize voice of only one person and demand prior training. The system identifies only certain sound patterns, which the user teaches the program while repeating phrases or commands several time. The system then defines the average of the repeated samples of the phrases pronounced, which in its turn becomes a template. After the “training” phase of the system, it can recognize the meaning of the phrases, that only fit the predefined templates.

Speaker-Independent Voice Recognition Applications

The second technique of speech recognisers creation is feature analysis approach. Speaker-independent applications are built in course of development of such type. The advantage of systems like these is their ability to recognise the voice of multiple speakers, and no need of their preliminary training. The voice input is processed via “linear predictive coding (LPC) or “Fourier transforms”, and then the system finds characteristic similarities between the expected voice input and the actual phrase pronounced by the user. This approach has one more benefit – unlike speaker-dependent systems the independent ones can deal with accent, pitch, volume, speed etc which differ from person to person.

build human speech recognition app

How We Worked on the App with Voice Recognition Technology

Mobilunity always tries to keep up with the latest trends in the world of high technologies and IT. Therefore, we take an enormous interest in voice recognition system development. We’ve been requested completion of a complex project – voice recognition software app – so our team did a profound research on the ways of implementation of the speech recognition features. Our cooperation with a customer is currently on a discovery stage. We are looking for solutions and existing voice recognition technologies, and studying experience of the well-known systems, the key feature of which is voice recognition. For now we’ve settled on feature analysis approach to development. The best solution for voice recognition application of the type is to create custom artificial neural network (ANN) and perform voice recognition based on existing API’s right from this network. Digitalization of the voice input is going to be done with the help of openSMILE(ANN)-lib. Synchronization of devices such as cell phone and smartwatch will be done via implementation of distributed function system. Though, the very development hasn’t started yet, speech recognition interface design, created by our team, has already been approved by the customer. We hope to take a few steps closer to invention of perfectly working speech recognition technologies!

Create innovative web and mobile applications using human speech recognition technology with Mobilunity!

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