CS6422-IS Cirrus Logic Inc, CS6422-IS Datasheet - Page 45

• Manufacturer Part Number: CS6422-IS
• Description: Speech Network Standard 12dB 20-Pin SOIC
• Manufacturer: Cirrus Logic Inc
• Type: Audio Processorr

Specifications of CS6422-IS

• Package: 20SOIC
• Maximum Transmitter Gain: 12 dB
• Typical Supply Current: 50 mA
• Typical Operating Supply Voltage: 5 V
• Applications: Speakerphones
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1201-5

6. GLOSSARY
Echo
Network Echo
Acoustic Echo
Reverberation
Near-End
Far-End
Transmit Path
Receive Path
Full-Duplex
Half-Duplex
Supplementary Echo Suppression
Howling
Acoustic Coupling
DS295F1
A signal that returns to its source after some delay.
Echo resulting from signal reflection due to an impedance mismatch in a 2-to-4 wire converter (hybrid).
Echo created by signal propagation in a room from a speaker to a microphone.
Local information that bounces around the room before it reaches the microphone. An example of
reverberation is when your back is to the speakerphone, and your voice bounces off the wall before it
reaches the microphone.
The location with the acoustic interface (speaker and microphone).
The location connected to the network interface.
The signal path from Near-End input to Far-End output.
The signal path from Far-End input to Near-End output.
The state when both Transmit and Receive paths are simultaneously active.
The state when either Transmit or Receive path is active.
Dynamic attenuation placed in the opposite path of the active path to mask residual echo. For example,
if the receive path is active, the transmit path is attenuated. When both paths are simultaneously active,
the suppression attenuation is removed. See Section 4.1.4, “Suppression” for more details.
In full-duplex operation, both the microphone and speaker are active at the same time, which, in
conjunction with the reflection off the hybrid, creates a closed loop. The signal coupling between the
speaker and the microphone can cause feedback oscillation or howling. This happens when the
coupling between the speaker and microphone is strong enough to increase the system's closed loop
gain above unity.
The strength of the output signal from the speaker that is received at the microphone input.
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