Glossary | 33 |
Glossary |
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Acoustic Echo Cancellation (AEC) | A process in which acoustical echo is |
removed from a signal. AEC can be used to remove unwanted signals from mic audio if the unwanted acoustic signal is available separately as an electronic signal.
Ambient Noise The existing
Attenuation A reduction of signal amplitude.
Automatic Gain Control (AGC) Automatically increases or decreases audio gain to maintain a consistent audio level.
Automatic Microphone Mixer A microphone mixer that automatically activates and deactivates microphone channels. This serves to increase intelligibility of the audio by reducing reverberation and noise picked up by the microphones.
Clipping A condition in which a signal level exceeds the maximum level a circuit can handle. This is usually caused by overdriving an input. It always causes distortion and typically leads to listener fatigue and accelerated failure of loudspeaker drivers.
Digital Hybrid A telephone hybrid that uses digital signal processing to provide excellent audio separation between the send and receive audio paths.
Distributed Echo Cancellation ClearOne’s proprietary system for applying echo cancellation individually to each mic input. Used in AP800 and AP400 units.
Digital Signal Processor (DSP) A high speed digital numeric processor that can rapidly calculate complex mathematical equations. The DSP is the most important component used in ClearOne digital products.
Echo Cancellation The process in which acoustic echoes are canceled. This is accomplished by sampling the distant audio that is amplified through the loudspeaker in the room. When this audio is picked up by the microphone (this is acoustic echo), an echo canceller eliminates or “cancels” the echo.
Four Wire Typically refers to audio in and out of a video codec.
units.
Integrated Dialing The ability of a telephone hybrid to dial (generate touch tones) via an