SAA2520 Datasheet, PDF (6/36 Pages) NXP Semiconductors – Stereo filter and codec for MPEG layer 1 audio applications

Philips Semiconductors
Stereo filter and codec for MPEG layer 1
audio applications
Preliminary specification
SAA2520
handbook, full pagewidth
from SAA2521
ALLOCATION &
SCALE FACTOR
INFORMATION
TABLE
base band
samples
SUB-BAND
FILTER
sub - band
samples
SCALING &
QUANTIZATION
allocation information
and scale factor indices
SYNC AND
CODING
INFORMATION
quantized samples
FORMATTER
MPEG
OUTPUT
DATA
MLB128
Fig.4 Encoding mode.
handbook, full pagewidth
sync/coding
CONTROL
MPEG
input
data
allocation
DE–
FORMATTER
scale factor
quantized
samples
SCALE
FACTOR
ARRAY
& ALLOCATION
DEQUANTIZATION
MULTIPLY
sub-band
samples
OUTPUT
CONTROL
SUB-BAND
FILTER
base band
samples
Fig.5 Decoding mode.
MLB129
August 1993
6