STA015_04 Datasheet, PDF (1/55 Pages) STMicroelectronics – MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM CAPABILITY

STA015
STA015B STA015T
MPEG 2.5 LAYER III AUDIO DECODER
WITH ADPCM CAPABILITY
■ SINGLE CHIP MPEG2 LAYER 3 DECODER
SUPPORTING:
– All features specified for Layer III in ISO/IEC
11172-3 (MPEG 1 Audio)
– All features specified for Layer III in ISO/IEC
13818-3.2 (MPEG 2 Audio)
– Lower sampling frequencies syntax exten-
sion, (not specified by ISO) called MPEG 2.5
■ DECODES LAYER III STEREO CHANNELS,
DUAL CHANNEL, SINGLE CHANNEL (MONO)
■ SUPPORTING ALL THE MPEG 1 & 2
SAMPLING FREQUENCIES AND THE
EXTENSION TO MPEG 2.5:
48, 44.1, 32, 24, 22.05, 16, 12, 11. 025, 8 KHz
■ ACCEPTS MPEG 2.5 LAYER III
ELEMENTARY COMPRESSED BITSTREAM
WITH DATA RATE FROM 8 Kbit/s UP TO 320
Kbit/s
■ ADPCM CODEC CAPABILITIES:
– sample frequency from 8 kHz to 32 kHz
– sample size from 8 bits to 32 bits
– encoding algorithm: DVI,
ITU-G726 pack (G723-24, G721,G723-40)
– Tone control and fast-forward capability
■ EASY PROGRAMMABLE GPSO INTERFACE
FOR ENCODED DATA UP TO 5Mbit/s
(TQFP44 & LFBGA 64)
■ DIGITAL VOLUME CONTROL
■ DIGITAL BASS & TREBLE CONTROL
■ BYPASS MODE FOR EXTERNAL AUDIO
SOURCE
■ SERIAL BITSTREAM INPUT INTERFACE
■ EASY PROGRAMMABLE ADC INPUT
INTERFACE
■ ANCILLARY DATA EXTRACTION VIA I²C
INTERFACE.
■ SERIAL PCM OUTPUT INTERFACE (I²S AND
OTHER FORMATS)
■ PLL FOR INTERNAL CLOCK AND FOR
OUTPUT PCM CLOCK GENERATION
■ CRC CHECK AND SYNCHRONISATION
ERROR DETECTION WITH SOFTWARE
March 2004
SO28
TQFP44
LFBGA64
ORDERING NUMBER: STA015$ (SO28)
STA015T$ (TQFP44)
STA015B$ (LFBGA 8x8)
INDICATORS
■ I²C CONTROL BUS
■ LOW POWER 2.4V CMOS TECHNOLOGY
■ WIDE RANGE OF EXTERNAL CRYSTALS
FREQUENCIES SUPPORTED
APPLICATIONS
■ PC SOUND CARDS
■ MULTIMEDIA PLAYERS
■ VOICE RECORDERS
DESCRIPTION
The STA015 is a fully integrated high flexibility
MPEG Layer III Audio Decoder, capable of decod-
ing Layer III compressed elementary streams, as
specified in MPEG 1 and MPEG 2 ISO standards.
The device decodes also elementary streams
compressed by using low sampling rates, as spec-
ified by MPEG 2.5. STA015 receives the input
data through a Serial input Interface. The decoded
signal is a stereo, mono, or dual channel digital
output that can be sent directly to a D/A converter,
by the PCM Output Interface.
This interface is software programmable to adapt
the STA015 digital output to the most common
DACs architectures used on the market. The func-
tional STA015 chip partitioning is described in
Fig.1a and Fig.1b.
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