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About Us
About Us
Consilient develops optimised software algorithms involved in voice, data, fax and video communications. We also provide integrated solutions for the embedded and networked markets.
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Multimedia Codecs
In today's rapidly advancing technological world, high-quality communication and multimedia experiences are essential. Consilient offers a superior range of voice, audio, and video codecs designed to meet the highest performance, reliability, and efficiency standards.
Know MoreVoLTE Voice Engine
In the fast-evolving world of mobile communication, delivering clear, high-quality voice calls over LTE networks has become a fundamental necessity. Consilient's VoLTE Voice Engine is at the forefront of this technological revolution, offering a superior voice-over LTE (VoLTE) service solution.
Know MoreVoice Quality Enhancement
In today's digital age, clear and effective communication is paramount. Whether for business meetings, virtual conferences, or personal calls, superior voice quality can significantly impact the user experience. Consilient's Voice Quality Enhancement solutions are designed to address common audio challenges.
Know MoreAcoustic Beamforming
At Consilient, we are at the forefront of audio innovation, bringing you state-of-the-art acoustic microphone beamforming software that transforms how you capture and experience sound. Our cutting-edge acoustic beamforming products are designed to provide unparalleled clarity and precision.
Know MoreVoIP Call Decoder
Consilient's VoIP Call Decoder is an innovative solution designed to meet the growing demands of Lawful Interception and communication management. This state-of-the-art product is engineered to handle voice, fax, and video data, providing unparalleled capabilities for VoIP decoding.
Know MoreEmbedded Voice Over IP
In the ever-evolving landscape of embedded systems, integrating Voice over Internet Protocol (VoIP) has opened new avenues for communication technology. Consilient has developed a cutting-edge Embedded Voice Over IP (VoIP) product that offers a compact and powerful solution tailored for microcontroller (MCU).
Know MoreSIP SoftModem Server (SSMS)
The demand for efficient and scalable communication solutions has never been higher in today's digital age. Consilient's SIP SoftModem Server (SSMS) is designed to meet this demand, offering a robust and versatile Cloud SIP-based SoftModem server solution.
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EVS (Enhanced Voice Services) Codec - High-Quality Voice & Audio for VoLTE and VoNR
The EVS codec, or Enhanced Voice Services codec, is a next-generation 3GPP standardized audio codec designed for superior speech and audio performance over modern mobile and IP networks. Developed for VoLTE and VoNR systems, EVS supports both narrowband, wideband and fullband audio, offering high-quality voice, improved resilience to network impairments, and support for audio up to 20 kHz. It is backward compatible with AMR-WB and is optimized for both real-time and streaming applications.
Technical Specifications - EVS Codec
| Parameter | Specification |
|---|---|
| Full Name | Enhanced Voice Services (EVS) Codec |
| Standardized By | 3GPP (ETSI TS 26.441, 26.442, 26.443) |
| Bandwidth | Narrowband (NB), Wideband (WB), Super-Wideband (SWB), Fullband (FB) |
| Sampling Rate | 8, 16, 32, 48 kHz |
| Bit Rates Supported | 5.9 to 128 kbps (Variable, scalable) |
| Frame Size | 20 ms per frame |
| Codec Delay | ~32 ms (standard mode), lower for low-delay modes |
| Frame Structure | Flexible frame structure, supports compact, compact-vbr, and primary formats |
| Algorithm | Algebraic Code Excited Linear Prediction (ACELP) + Transform Coding |
| Voice Activity Detection | Yes (with advanced DTX, Comfort Noise Generation) |
| Error Resilience | High - supports jitter concealment, channel-aware mode, and packet loss recovery |
| Complexity | High - optimized for modern mobile processors and hardware accelerators |
Applications Areas of EVS Codec
Next-Generation Mobile Voice
- VoLTE (Voice over LTE), VoWiFi, VoNR (Voice over 5G NR)
- Backward compatible with AMR-WB
IP and VoIP and OTT Communication
- SIP/IMS based VoIP clients
- WebRTC and high-fidelity conferencing systems
- Softphone and collaboration tools
- IoT VoIP applications
Multimedia Messaging and Recording
- High-quality voice notes and messaging
- Fullband audio recording and playback
Professional and Consumer Audio
- Audio streaming over constrained networks
- Interactive voice systems and smart assistants
Performance Summary - EVS Codec
| Bitrate (kbps) | Bandwidth | Speech Quality (MOS-LQO) | Use Case |
|---|---|---|---|
| 5.9 | Narrowband | ~3.5 | Low-bitrate fallback, weak network |
| 13.2 | Wideband | ~4.2 | Standard VoLTE call, high resilience |
| 24.4 | Super-Wideband | ~4.5 | HD Voice+, conferencing |
| 48.0 | Fullband | ~4.8-5.0 | Music/audio transmission, premium voice |
Supported Platforms
- Operating Systems: Linux, Android, iOS, Embedded RTOS
- Architectures: ARM Cortex-A/R/M, NEON/SIMD, x86/x64, MIPS DSP, Andes DSP, Verisilicon ZSP
Why Choose the EVS Codec?
Superior speech quality across all bandwidths (NB to FB)
Resilient under harsh network conditions and packet loss
Efficient, scalable bitrate control for mobile/IP networks
Widely adopted in VoLTE, VoNR, and modern OTT platforms
Supports high-fidelity audio for immersive communication
References & Standards - EVS Codec
- ETSI TS 126.441 - EVS Codec General Overview
- ETSI TS 126.442 - EVS Codec Detailed Algorithm Description
- ETSI TS 126.443 - EVS Codec Conformance Testing
- IETF RFC 8260 - RTP Payload Format for EVS Codec
- 3GPP TS 26.445 - EVS Codec Performance Testing & Evaluation A
