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S5L9284

DIGITAL SIGNAL PROCESSOR

Samsung 

S5L9284D

DIGITAL SIGNAL PROCESSOR

INTERPOLATION / MUTE BLOCK

Interpolator

When a burst error occurs on a disc, sometimes the data can’t be corrected even if an ECC process is performed.

The interpolator block revises data by using a C2 pointer output through the ECC block.The data input to a data

bus is input to the left and right channel, respectively, in the order of the lower 8-bit and the upper 8-bit.

A pre-hold method is taken when a C2 pointer is “H” continuously. In case of a single error, an everage

interpolation method is carried out with the range of the data before and after an error happens.

When LRCH signal during one LRCH cycle is “L”, R-CH data is output, L-CH data is output when the check is “H”.

A

B

C

H

I

J

G

D

E

F

C2

pinter

B = A+C ; average interpolation

2

F= E = D : provious datahold

G = F+H ; average interpolation

2

Figure 11. Interpolation.

Mute and Attenuation

By using a mute terminal and the ATTM signal of the CNTL-S register, audio data is muted or attenuated.There are

two kinds of mute: zero-cross muting and muting

A. Zero-Cross Muting

The audio data is muted, after ZCMT of CNTL-Z register goes to “H”. In that case the mute is “H” and the upper 6-

bit of audio data became all “L” or “H”.

B. Muting

The audio data is muted when ZCMT of the CNTL-Z register is “L” and the mute terminal is “H”.

C. Attenuation

The signal attenuation occurs by the means of the ATTM of the CNTL-Z register, and the mute signal as shown the

following,.

Attm

0

0

1

1

Mute

0

1

0

1

Degree of Attenuation

0 dB

− ∞ dB

−12 dB

−12 dB

18

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