-
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.
- Products
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.
Know More - Services
- Resources
- Contact Us
ITU-T Speech Codecs - Specs & Comparison Guide (G.711 to G.729AB)
The ITU-T speech codecs are a family of speech compression standards developed for telephony and multimedia communications. These codecs are widely deployed in PSTN, VoIP, conferencing, and enterprise communication systems. They offer a range of bandwidths, complexities, and bitrates suitable for different network conditions and application needs.
Technical Specifications - ITU-T Codecs
| Codec | Bandwidth | Bitrate(s) | Sampling Rate | Algorithm | Frame Size |
|---|---|---|---|---|---|
| G.711 | Narrowband | 64 kbps | 8 kHz | PCM (μ-law / A-law) | 0.125 ms |
| G.722 | Wideband | 48, 56, 64 kbps | 16 kHz | SB-ADPCM | 3 ms |
| G.722.1 | Wideband | 24, 32 kbps | 16 kHz | Transform Coder (MDCT) | 20 ms |
| G.723.1 | Narrowband | 5.3, 6.3 kbps | 8 kHz | ACELP / MP-MLQ | 30 ms |
| G.726 | Narrowband | 16, 24, 32, 40 kbps | 8 kHz | ADPCM | 0.125 ms |
| G.728 | Narrowband | 16 kbps | 8 kHz | LD-CELP | 0.625 ms |
| G.729AB | Narrowband | 8 kbps (G.729) + SID | 8 kHz | CS-ACELP | 10 ms |
Applications Areas of ITU-T Speech Codecs
Telephony & PSTN Networks
- G.711 and G.726 used in digital and IP-based PBX systems
- G.723.1 and G.729AB in circuit-switched voice and VoIP trunking
VoIP and Enterprise Communication
- G.722 and G.722.1 for HD voice in SIP/VoIP endpoints
- G.729AB for bandwidth-constrained VoIP
Unified Communication & Conferencing
- G.722.1 in IP telephony systems
- G.728 for low-delay conferencing codecs
Embedded and Legacy Systems
- G.711 and G.726 for interop with legacy PSTN and DECT systems
- Codec fallback in hybrid networks and gatewaystc.
Performance Summary - ITU-T Codecs
| Codec | MOS-LQO (Approx.) | Use Case |
|---|---|---|
| G.711 | ~4.3 | Baseline PSTN/VoIP quality |
| G.722 | ~4.5 | HD Voice over IP (wideband telephony) |
| G.722.1 | ~4.0-4.2 | Wideband conferencing, VoIP terminals |
| G.723.1 | ~3.6-3.8 | Low-bitrate VoIP over narrow links |
| G.726 | ~3.8-4.1 | Voice trunking, legacy systems |
| G.728 | ~3.8 | Low-delay interactive speech |
| G.729AB | ~4.0 (G.729) / ~3.8 (G.729AB) | VoIP in constrained networks |
Supported Platforms
- Operating Systems: Linux, Android, iOS, Embedded RTOS
- Architectures: ARM Cortex-A/R/M, NEON/SIMD, x86/x64, MIPS DSP, Andes DSP, Verisillicon ZSP
Why choose the ITU-T Speech Codecs?
Industry-standard and widely interoperable
Cover full spectrum from narrowband to wideband
Suitable for low-delay and low-bitrate requirements
Royalty-free options (G.711, G.722, G.726) available
Deployed in billions of telecom and IP devices
References & Standards - ITU-T Speech Codecs
- ITU-T G.711 - Pulse Code Modulation of Voice Frequencies
- ITU-T G.722 - 7 kHz Audio Coding for Hands-Free Telephony
- ITU-T G.722.1 - Low Complexity Coding at 24 and 32 kbps
- ITU-T G.723.1 - Dual Rate Speech Coder for Multimedia
- ITU-T G.726 - ADPCM Coding of Speech Signals
- ITU-T G.728 - LD-CELP Speech Codec
- ITU-T G.729, G.729 - Annex A/B - CS-ACELP Coding at 8 kbps
