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ST Microelectronics - (STA015x) MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM CAPABILITY

Numéro de référence STA015B
Description (STA015x) MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM CAPABILITY
Fabricant ST Microelectronics 
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STA015B fiche technique
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)
m– Lower sampling frequencies syntax exten-
osion, (not specified by ISO) called MPEG 2.5
.cDECODES LAYER III STEREO CHANNELS,
DUAL CHANNEL, SINGLE CHANNEL (MONO)
SUPPORTING ALL THE MPEG 1 & 2
USAMPLING FREQUENCIES AND THE
EXTENSION TO MPEG 2.5:
t448, 44.1, 32, 24, 22.05, 16, 12, 11. 025, 8 KHz
ACCEPTS MPEG 2.5 LAYER III
eELEMENTARY COMPRESSED BITSTREAM
WITH DATA RATE FROM 8 Kbit/s UP TO 320
eKbit/s
hADPCM CODEC CAPABILITIES:
– sample frequency from 8 kHz to 32 kHz
S– sample size from 8 bits to 32 bits
– encoding algorithm: DVI,
taITU-G726 pack (G723-24, G721,G723-40)
– Tone control and fast-forward capability
aEASY PROGRAMMABLE GPSO INTERFACE
FOR ENCODED DATA UP TO 5Mbit/s
.D(TQFP44 & LFBGA 64)
DIGITAL VOLUME CONTROL
DIGITAL BASS & TREBLE CONTROL
wBYPASS MODE FOR EXTERNAL AUDIO
SOURCE
wSERIAL BITSTREAM INPUT INTERFACE
wEASY PROGRAMMABLE ADC INPUT
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-
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
ified by MPEG 2.5. STA015 receives the input
mdata through a Serial input Interface. The decoded
osignal is a stereo, mono, or dual channel digital
.coutput that can be sent directly to a D/A converter,
Uby the PCM Output Interface.
t4This interface is software programmable to adapt
ethe STA015 digital output to the most common
eDACs architectures used on the market. The func-
htional STA015 chip partitioning is described in
SFig.1a and Fig.1b.
www.Data 1/55

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