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MAS3549F 参数 Datasheet PDF下载

MAS3549F图片预览
型号: MAS3549F
PDF下载: 下载PDF文件 查看货源
内容描述: MAS 35x9F MPEG 2/3层, AAC音频解码器, G.729附录编解码器 [MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec]
分类和应用: 解码器编解码器
文件页数/大小: 92 页 / 1187 K
品牌: MICRONAS [ MICRONAS ]
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MAS 35x9F  
DATA SHEET  
2
Table 3–17: Codec status registers on I C subaddress 6D  
hex  
Register  
Address  
(hex)  
Function  
Name  
INPUT QUASI-PEAK  
00 0A  
A/D Converter Quasi-Peak Detector Readout Left  
QPEAK_L  
QPEAK_R  
bit[14:0]  
positive 15-bit value, linear scale  
0%  
25% (12 dBFS)  
50% (6 dBFS)  
100% (0 dBFS)  
0000  
2000  
4000  
7FFF  
00 0B  
A/D Converter Quasi-Peak Detector Readout Right  
bit[14:0]  
positive 15-bit value, linear scale  
0%  
25% (12 dBFS)  
50% (6 dBFS)  
100% (0 dBFS)  
0000  
2000  
4000  
7FFF  
OUTPUT QUASI-PEAK  
00 0C  
Audio Processing Input Quasi-Peak Detector Readout Left  
bit[14:0] positive 15-bit value, linear scale  
Audio Processing Input Quasi-Peak Detector Readout Right  
bit[14:0] positive 15-bit value, linear scale  
DQPEAK_L  
DQPEAK_R  
00 0D  
3.4.4. Basic MB Configuration  
(which results in a softer/harder bass sound), turn  
on/off the MB  
With the parameters described in Table 3–16, the Mic-  
ronas Bass system (MB) can be customized to create  
different bass effects, as well as to fit the MB to various  
loudspeaker characteristics. The easiest way to find a  
good set of parameter is by selecting one of the set-  
tings below, listening to music with strong bass content  
and adjusting the MB parameters:  
– MB_STR: Increase/decrease the strength of the MB  
effect  
– MB_HAR: Increase/decrease the content of low fre-  
quency harmonics  
Frequency  
MB_SHAPE  
MB_FC  
– MB_FC: Shift the MB effect to lower/higher frequen-  
cies  
Fig. 3–5: Micronas Bass (MB): Bass boost in relation  
to input signal level  
– MB_SHAPE: Widen/narrow MB frequency range  
Table 3–18: Suggested MB settings  
Function  
MB_STR  
MB_HAR  
MB_FC  
MB_SHAPE  
(22  
)
(23  
)
(24  
)
(21  
)
hex  
hex  
hex  
hex  
MB off  
xxxx  
xxxx  
xxxx  
xx00  
hex  
hex  
hex  
hex  
Low end headphones, medium effect  
5000  
3000  
0600  
0902  
hex  
hex  
hex  
hex  
52  
June 30, 2004; 6251-505-1DS  
Micronas  
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