Yamaha MY4 Owner's Manual download pdf (Page 7)

MY4-AEC Owner’s Manual 7

MY4-AEC Signal Flow

The local and remote locations in a teleconferencing system are referred to as the “near end”

and “far end”, respectively. The MY4-AEC acoustic echo canceller (AEC) works by comparing

the reference signal received from the far-end with the signal from the microphone in order to

determine which components of the signal are echo, and then subtracts only the far-end echo

component from microphone signal. The near-end sound is thus clearly transmitted to the far

end without echo.

Reference signal FBS: Feedback suppressor NR: Noise reduction

From Far

end A Far

end Voice A

From Far

end B Far

end Voice B

From Far

end C Far

end Voice C

From Far

end D Far

end Voice D

To Far

end 4

Near

end Mic. 4

Near

end Voice 4

FBS

To Far

end 3

Near

end Mic. 3

Near

end Voice 3

FBS

To Far

end 2

Near

end Mic. 2

Near

end Voice 2

FBS

To Far

end 1

Near

end Mic. 1

Near

end Voice 1

FBS

AEC

Matrix Router

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Yamaha MY4 Owner's Manual Page 7

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