GL’s Speech Transcription Server (STS) is a PC-based automated speech-to-text conversion application. Among numerous applications, the Speech Transcription Server can be used for confirming voice prompts (announcements) and aid intestingInteractive Voice Response (IVR) systems as well as voice transportation over any network. Network providers use the application to record the voice prompts associated with the IVR, perform a Speech to Text conversion on the recording to confirm the prompt was proper (based on what the prompt should be), and thus confirming their IVR functioning. The application can be used to verify network quality as well as effect of different codecs on the speech quality.
The Speech Transcription Server is now enhanced with text-to-speech allowing automated on-the-fly generation of audio files from user-defined text required for voice responses in IVR systems. It can covert text into speech in more than 50 languages and variants saved in PCM or WAV audio file formats.
This application works with GL’s File Conversion Utility which supports various industry standard codecs. This application can be good companion for GL’s MAPS™, and VQuad™ applications that allow transmission and recording of voice to/from audio files over many industry standards telecommunication networks such as VoLTE, UMTS, GSM, FXO, FXS, 4-Wire, ISDN, SS7, etc.
By incorporating GL’s Speech Transcription Server, MAPS™ IVR allows users to automate precise IVR tree traversal configurations through MAPS™ profiles and test for pass/fail conditions. IVR menus are divided into configurable prompts where certain keywords are expected. MAPS record each prompt for speech-to-text transcription and analyzes the transcribed text.
The Speech-to-Text application can also supplement GL’s Voice Quality Testing solution providing a more passive method to verify good quality audio. Using the VQT intrusive method for Voice Quality, the customer needs to send a pre-defined voice sample from near to far-side, record at the far-side and analyze based on the file sent from near-side. This is a very accurate method for generating a Voice Quality measurement but requires equipment at both ends of the call.
Alternatively, if access to both sides of the call is not available, the Speech-to-Text method can simply record a pre-specified sentence at the far-end and provide a Certainty score of the recorded Text based on what was expected. The Speech to Text conversion can confirm if the received audio, for instance a customer speaking into their phone, matches what was expected which would confirm there was relatively good audio on the network.
Ability to convert PCM or WAV files into text format
Monitor single or multiple folders containing audio files for automatic transcription
Each monitored folder can be configured for language and audio format
Full automation using VQuad scripting
Transcribe up-to 30 seconds of speech files into text
Provides options to transcribe speech to text manually for a single PCM or WAV file using Manual Transcription option
Accurate analysis of transcribed text with quality (Pass/Fail) scores
Transcribe recorded short speech files into text; there is a maximum limit of 30 seconds for any single utterance
Cloud-based processing provides accurate translations (Requires internet connectivity)
Concurrent transcription of up to 30 voice files
Supports multi-languages such as U.S./U.K. English, French, German, Italian, Japanese and more
Easy to access transcribed text via file, API or database
Base Software includes up to 420 hours of audio transcription per year validity can be extended with annual support contract
REST API support for transcription request and transcript retrieval
Text to Speech feature -
Automated on-the-fly generation of audio files from user-defined text
Ability to convert text files into PCM (u-law, PCM16 16 kHz, PCM16 24 kHz) or WAV (u-law, a-law, WAV16 16 kHz, WAV16 24 kHz) speech file formats
The Speech Transcription Server can convert recorded audio (*.PCM or *.WAV) files into text format. Single or Multiple folders are monitored continuously for short audio files and once the files are detected, they are placed in the speech transcription queue for transcription. These files are sent to the cloud-based transcription service and are accurately converted to text.
Results are listed in the order they are transcribed and includes source file information (such as File Name, Directory path, Length of the file, Modified Date and Time) along with the transcribed file information such as Transcribed Date and Time, Transcription output text, Certainty score, and the Time taken in seconds to transcribe the file. The certainty ranges from 0-1 where 0 indicating the lowest confidence score and 1 indicating the highest confidence score for the transcribed text. Anything above or equal to 0.8 is considered as good confidence score.
Text to Speech Utility
STS utility is enhanced with text-to-speech feature that allows automated on-the-fly generation of audio files from user-defined text. The speech synthesizer provides options to configure the languages (more than 50 languages are supported) and save audio files in pcm/wav format. Text can be manually entered to generate the voice prompts in the selected audio file format. The converted audio files are automatically saved in the specified directory path.
Generation of Audio Files from User-defined Text
REST API Server
REST API Server helps to transcribe and get the transcribed results on the Remote PC using HTTP request on the configured REST API port number. REST API server allows one Speech Transcription Server instance to serve multiple clients. It allows the utility to be used with other GL’s intrusive test tools such as MAPS™ and VQuad™. One can send and receive transcription requests, as well as retrieve transcription results from database. Supports fast and easy integration with third party testing platforms.