Which ITU standard is commonly used for 8-bit audio in telephony?

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Multiple Choice

Which ITU standard is commonly used for 8-bit audio in telephony?

Telephony has long relied on 8-bit samples at an 8 kHz sampling rate, which gives about 64 kbps of audio. The ITU-T standard that specifies this exact setup is G.711. It uses 8-bit samples with either mu-law (common in North America and Japan) or A-law (used elsewhere) companding to cover a wide dynamic range. This combination is simple, introduces minimal latency, and is universally supported across traditional PSTN networks and many VoIP gateways, making it the standard choice for 8-bit audio in telephony. The other options refer to different codecs or features: one is a wideband codec with higher sampling rates, another is a low-bitrate coder, and the last is a video-related standard, none of which match the classic 8-bit telephony audio setup.

Telephony has long relied on 8-bit samples at an 8 kHz sampling rate, which gives about 64 kbps of audio. The ITU-T standard that specifies this exact setup is G.711. It uses 8-bit samples with either mu-law (common in North America and Japan) or A-law (used elsewhere) companding to cover a wide dynamic range. This combination is simple, introduces minimal latency, and is universally supported across traditional PSTN networks and many VoIP gateways, making it the standard choice for 8-bit audio in telephony. The other options refer to different codecs or features: one is a wideband codec with higher sampling rates, another is a low-bitrate coder, and the last is a video-related standard, none of which match the classic 8-bit telephony audio setup.

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