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MAS3559F датащи(PDF) 40 Page - Micronas

номер детали MAS3559F
подробное описание детали  MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
PDF  92 Pages
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производитель  MICRONAS [Micronas]
домашняя страница  http://www.micronas.com
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MAS3559F датащи(HTML) 40 Page - Micronas

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MAS 35x9F
DATA SHEET
40
June 30, 2004; 6251-505-1DS
Micronas
Table 3–11: D0 status memory cells
Memory
Address
Function
Name
D0:FCF
AAC bitrate in bit/s
AACbitrate
D0:FD0
MPEG Frame Counter
bit[19:0]
number of MPEG frames after synchronization
The counter will be incremented with every new frame that is decoded. With
an invalid MPEG bit stream at its input (e.g. an invalid header is detected), the
MAS 35x9F resets the MPEGFrameCount to ‘0’.
MPEGFrameCount
D0:FD1
MPEG Header and Status Information
bit[15]
reserved, must be set to zero
bit[14:13]
MPEG ID, Bits 12, 11 of the MPEG header
00
MPEG 2.5
01
reserved
10
MPEG 2
11
MPEG 1
not valid in case of AAC decoding (bit[12:11] = 00)
bit[12:11]
Bits 14 and 13 of the MPEG header
00
AAC
01
Layer 3
10
Layer 2
11
Layer 1
bit[10]
CRC Protection
0
bitstream protected by CRC
1
bitstream not protected by CRC
bit[9:2]
Reserved
bit[1]
CRC error
0
no CRC error
1
CRC error
bit[0]
Invalid frame
0
no invalid frame´
1
invalid frame
This location contains bits 15...11 of the original MPEG header and other sta-
tus bits. It will be set each frame directly after the header has been decoded
from the bit stream.
MPEGStatus1



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