Equivalent pulse code modulation noise: Difference between revisions
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In [[telecommunications]], '''equivalent pulse code modulation (PCM) noise''' is the amount of [[noise power]] on a [[frequency-division multiplexing]] (FDM) or wire [[communication channel]] necessary to approximate the same judgment of speech quality created by [[quantization noise]] in a [[Pulse-code modulation|PCM]] channel. | In [[telecommunications]], '''equivalent pulse code modulation''' ('''PCM''') '''noise''' is the amount of [[noise power]] on a [[frequency-division multiplexing]] (FDM) or wire [[communication channel]] necessary to approximate the same judgment of speech quality created by [[quantization noise]] in a [[Pulse-code modulation|PCM]] channel. | ||
:''Note 1: The speech quality judgment is based on comparative tests.'' | :''Note 1: The speech quality judgment is based on comparative tests.'' | ||
Latest revision as of 00:24, 31 August 2025
In telecommunications, equivalent pulse code modulation (PCM) noise is the amount of noise power on a frequency-division multiplexing (FDM) or wire communication channel necessary to approximate the same judgment of speech quality created by quantization noise in a PCM channel.
- Note 1: The speech quality judgment is based on comparative tests.
- Note 2: Generally, 33.5 dBrnC ±2.5 dB is considered the approximate equivalent PCM noise of a 7-bit PCM system.
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