The SAA2521 is a masking threshold processor for MPEG layer 1 audio compression applications produced by Philips Semiconductors. It features stereo or 2-channel mono encoding, status may be read continuously, microcontroller interface, I2S interfaces, allocation algorithm including optional emphasis correction (for 44.1 kHz), reduced power consumption, 4 V nominal operating voltage capability.
The SAA2521 is an integrated circuit intended for use in conjunction with the stereo filter codec SAA2520. It performs adaptive allocation and scaling functions to calculate masking thresholds and sub-band sample accuracy for MPEG Layer 1 audio encoding.
The device supports both encoding and decoding modes, utilizing a microcontroller interface for configuration and status monitoring. Key features include support for stereo or 2-channel mono encoding, reduced power consumption with a nominal operating voltage of 4 V, and an allocation algorithm including optional emphasis.
| Operating Voltage | 4 V nominal / +5 V |
|---|---|
| Sub-band Signals | 32 sub-bands |
| Compatible Codec | SAA2520 |
It performs adaptive allocation and scaling to calculate masking thresholds for MPEG Layer 1 audio compression.
It is intended for use in conjunction with the stereo filter codec SAA2520.