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STA015 Datasheet(PDF) 25 Page - STMicroelectronics

Part # STA015
Description  MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM CAPABILITY
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA015 Datasheet(HTML) 25 Page - STMicroelectronics

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STA015 STA015B STA015T
Bitrate_index
indicates the bitrate (Kbit/sec) depending on the MPEG ID.
Sampling Frequency
indicates the sampling frequency of the encoded audio signal (KHz) depending on the MPEG ID
Padding bit
if this bit equals ’1’, the frame contains an additional slot to adjust the mean bitrate to the sampling fre-
quency, otherwise this bit is set to ’0’.
Private bit
Bit for private use. This bit will not be used in the future by ISO/IEC.
Mode
Indicates the mode according to the following table. The joint stereo mode is intensity_stereo and/or
ms_stereo.
bitrate index
ID = 1
ID = 0
’0000’
free
free
’0001’
32
8
’0010’
40
16
’0011’
48
24
’0100’
56
32
’0101’
64
40
’0110’
80
48
’0111’
96
56
’1000’
112
64
’1001’
128
80
’1010’
160
96
’1011’
192
112
’1100’
224
128
’1101’
256
144
’1110’
320
160
’1111’
forbidden
forbidden
Sampling Frequency
MPEG1
MPEG2
MPEG2.5
’00’
44.1
22.05
11.03
’01’
48
24
12
’10’
32
16
8
’11’
reserved
reserved
reserved
mode
mode specified
’00’
stereo
’01’
joint stereo (intensity_stereo and/or ms_stereo)
’10’
dual_channel
’11’
single_channel (mono)



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