Convert 3GPP to AMR — Free Online Converter
Convert 3GPP Multimedia (.3gpp) to Adaptive Multi-Rate Audio (.amr) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Om konvertering fra 3GPP til AMR
AMR (Adaptive Multi-Rate) is the voice-optimized codec that 3GPP originally designed for GSM mobile telephony. Operating at 8 kHz with bitrates from 4.75 to 12.2 kbps, AMR produces the smallest possible voice files while maintaining speech intelligibility. Since many 3GPP files already contain AMR audio internally, this conversion often amounts to extracting the existing AMR stream into a standalone audio file.
Hvorfor konvertere 3GPP til AMR?
Extracting AMR audio from a 3GPP video file produces an extremely compact voice recording. At 12.2 kbps, one minute of AMR audio occupies only about 90 KB — making it ideal for mass archival of voice recordings, MMS transmission on constrained networks, or feeding into telephony-grade processing systems.
Some IVR (Interactive Voice Response) systems, voice biometric platforms, and legacy cellular infrastructure specifically require AMR input. These systems were designed to process narrowband speech and may perform poorly with wider-bandwidth audio formats. Converting 3GPP to AMR preserves the exact audio characteristics these systems expect.
Almindelige anvendelser
- Extracting voice recordings from 3GPP videos into standalone AMR files