Audio Codecs |
Audio Codec | Description | Frequency/Sampling Rate |
---|---|---|
CCITT A-Law | The International Telecommunications Union (ITU) CCITT A-Law codec is supported by many hardware configurations and offers a 2:1 compression ratio (from 16 bits to 8 bits per sample). Also known as G.711. | 7.200 kHz, 8-bit, Mono 8.000 kHz, 9.600 kHz, 8-bit, Mono 11.025 kHz, |
CCITT u-Law | Same as the CCITT A-Law codec, but provides compatibility with standards used in North America. | Same as the CCITT A-Law codec. |
GSM 6.10 | The Groupe Spécial Mobile (GSM) codec is designed for the efficient compression of speech and is best for mid to high bit rate voice-oriented sound. GSM provides 320:33 (approx. 9:1), real-time compression. GSM conforms to the European Telecommunications Standards Institute recommendation 6.10. | 8.000 kHz, Mono, 1 kbps |
IMA ADPCM | The Interactive Multimedia Association (IMA) ADPCM codec is designed for multiple hardware platforms and offers high quality, real-time compression with high bit rate content. IMA ADPCM provides fast 4:1 compression. | 7.200 kHz, 4-bit, Mono 8.000 kHz, 9.600 kHz, 4-bit, Mono 11.025 kHz, |
PCM | The Pulse-Code Modulation (PCM) provides uncompressed audio for higher bit rate content. With PCM, you receive the best possible sound quality. | 7.200 kHz, 8-bit, Mono 7.200 kHz, 16-bit, Mono 8.000 kHz, 8.000 kHz, 7.200 kHz, 8-bit, Mono 9.600 kHz, 16-bit, Mono 11.025 kHz, 11.025 kHz, |
Rockwell ADPCM | The Rockwell ADPCM codec is designed for Rockwell hardware. This ADPCM codec offers high quality, real-time compression with high bit rate content. | 7.200 kHz, 2-bit, Mono 7.200 kHz, 4-bit, Mono |
ZyXEL ADPCM | The ZyXEL ADPCM codec is designed for ZyXEL hardware. This ADPCM codec offers high quality, real-time compression with high bit rate content. 4-bit codec provides fast 4:1 compression. | 7.200 kHz, 4-bit, Mono 8.000 kHz, 9.600 kHz, 4-bit, Mono 11.025 kHz, |