QoS TEST SOLUTIONS

Voice / Video / Data

Speech Transcription Server

Speech to Text Conversion


Latest Software

    • Speech Transcription Server Software Ver 1.5.1.1
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Overview

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 testing Interactive 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.

Speech Transcription Server

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.



Main Features

  • Ability to convert PCM or WAV or GLW 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 or GLW 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
  • 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

Working Principle

The Speech Transcription Server can convert recorded audio (*.PCM or *.WAV or *.PCM) 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.

working-principle


Transcription Results

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.

Speech Transcription Server results

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
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.

REST API Server

Resources

Item No. Item Description

VQT009

Speech-to-Text Conversion

 

 Related Hardware

MAPS™ APS 24 Port

DP005B - Rackmount PC, 1U 19", Xeon – Standard
APSCB-24 - 24 Port Analog Phone Simulator (APS), 115V
PTE001 - tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software

MAPS™ APS 48 Port

DP005B - Rackmount PC, 1U 19", Xeon – Standard
APSCB-48- 48 Port Analog Phone Simulator (APS), 115V
PTE001 - tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software

MAPS™ APS 96 Port

SA005r - Rackmount PC, 2U 19", Xeon – Standard
2x APSCB-48- 48 Port Analog Phone Simulator (APS), 115V
FTE001 - QuadXpress T1 E1 (Main Board)
ETA004 - Four Port License for T1

MAPS™ APS 192 Port

SA005r- Rackmount PC, 2U 19", Xeon – Standard
2x APSCB-48- 48 Port Analog Phone Simulator (APS), 115V
FTE001 - QuadXpress T1 E1 (Main Board)
ETE001 - QuadXpress T1 E1 (Daughter Board)
ETA008 - Eight Port License for T1

MAPS™ ALS 48 Port
(ALS048)

SA005r - Rackmount PC, 2U 19", Xeon – Standard
APSCB-48- 48 Port Analog Phone Simulator (APS), 115V
DS011 - 24-Port Telco Breakout Box
SA004c - Accessory Kit (Rackmount)
PTE001 - tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software

MAPS™ ALS 96 Port
(ALS096)

SA005r - Rackmount PC, 2U 19", Xeon – Standard
2x APSCB-48- 48 Port Analog Phone Simulator (APS), 115V
DS011 - 24-Port Telco Breakout Box
SA004c - Accessory Kit (Rackmount)
FTE001 - QuadXpress T1 E1 (Main Board)
ETA004 - Four Port License for T1

 Related Software

VQT002

Voice Quality Testing (PESQ only)

VQT006

VQT w/ POLQA server licenses
VQT014 AutoVQT™ (POLQA v2.4)
VQT014U Upgrade from VQT POLQA to AutoVQT™

VQT010

VQuad™ Software (Stand Alone)

VQT013

VQuad™ with SIP (VoIP) Call Control

VQT252

Dual UTA HD – Bluetooth Option

VQT461

Dual UTA HD Smartphone ACC Cable

PKS102

RTP Soft Core for RTP Traffic Generation

PKS120

MAPS™ SIP

PKS108

RTP Voice Quality Measurements

* Specifications are subject to change without notice.