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MAS35X9F Datasheet(PDF) 42 Page - Micronas

Part # MAS35X9F
Description  MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
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Manufacturer  MICRONAS [Micronas]
Direct Link  http://www.micronas.com
Logo MICRONAS - Micronas

MAS35X9F Datasheet(HTML) 42 Page - Micronas

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MAS 35x9F
DATA SHEET
42
June 30, 2004; 6251-505-1DS
Micronas
D0:FD2
(continued)
MPEG Header Information, continued
bit[11:10]
Sampling frequencies in Hz
MPEG1
MPEG2
MPEG2.5
00
44100
22050
11025
01
48000
24000
12000
10
32000
16000
8000
11
reserved
reserved
reserved
bit[9]
Padding Bit
bit[8]
reserved
bit[7:6]
Mode
00
stereo
01
joint_stereo (intensity stereo / m/s stereo)
10
dual channel
11
single channel
bit[5:4]
Mode extension (applies to joint stereo only)
intensity stereo
m/s stereo
00
off
off
01
on
off
10
off
on
11
on
on
bit[3]
Copyright Protect Bit
0/1
not copyright protected/copyright protected
bit[2]
Copy/Original Bit
0/1
bitstream is a copy/bitstream is an original
bit[1:0]
Emphasis, indicates the type of emphasis
00
none
01
50/15
µs
10
reserved
11
CCITT J.17
This memory cell contains the 16 LSBs of the MPEG header. It will be set
directly after synchronizing to the bit stream.
Note that for AAC four bits are needed to define the sampling frequency while
for Layer2/Layer3 two bits are sufficient. This leads to an inconsistency in the
format of bits 13...10.
MPEGStatus2
D0:FD3
MPEG CRC Error Counter
The counter will be increased by each CRC error detected in the MPEG bis-
stream. It will not be reset when losing the synchronization.
CRCErrorCount
D0:FD4
Number of Bits in Ancillary Data
Number of valid ancillary bits in the current MPEG frame.
NumberOfAncillary-
Bits
D0:FD5
...
D0:FF1
Ancillary Data
(see Section 3.3.6. on page 43).
AncillaryData
Table 3–11: D0 status memory cells, continued
Memory
Address
Function
Name


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