CXA1842 SONY [Sony Corporation], CXA1842 Datasheet - Page 6

• Manufacturer Part Number: CXA1842
• Description: 3-Mode Surround and Vocal Cancellation
• Manufacturer: SONY [Sony Corporation]

Description of Functions
(1) Simulated Stereo
(2) Surround A (matrix surround)
(3) Surround B
(4) Pass
(5) Vocal Cancellation
* Simulated Stereo circuit:
The sum of the L and R signals is input to the Simulated Stereo* (hereafter S.S) block, and a simulated
stereo signal is generated.
The difference of the L and R signals is raised in level by the VCA (maximum 18 dB (typ.)), and is added
to the raw signal.
The difference of the L and R signals is raised in level by the VCA (maximum 18 dB (typ.)), is input to the
S.S block, and is then added to the raw signal.
The L and R signals are output without modification.
The difference of the L and R signals is input to the S.S block after first passing through the AGC circuit,
and is then output to L and R. In contrast with conventional products, the vocal cancel signal (L-R signal)
is raised in level by the VCA (max. 12 dB typ.), and low frequency part is enhanced, to prevent reduction in
the acoustic pressure level when vocal cancellation is ON.
Phases in the audio band are divided into two separate orthogonal channels and treated as L+R and L-R
signals, and are added and subtracted to produce simulated L and R signals. All-pass network.
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CXA1842S