参数资料
型号: MAS3549F
厂商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分类: Codec
英文描述: MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
中文描述: 新加坡金融管理局35x9F的MPEG 2 / 3层,AAC音频解码器,G.729的附件A编解码器
文件页数: 49/92页
文件大小: 1186K
代理商: MAS3549F
DATA SHEET
MAS 35x9F
Micronas
June 30, 2004; 6251-505-1DS
49
00 1E
Loudness
bit[15:8]
Loudness Gain
44
hex
40
hex
...
04
hex
00
hex
Loudness Mode
00
hex
04
hex
+
17 dB
+
16 dB
+
1 dB
0 dB
bit[7:0]
normal (constant volume at 1 kHz)
Super Bass (constant volume at 2 kHz)
Higher resolution of Loudness Gain is possible: An LSB step results in a gain
step of about 1/4 dB.
Loudness increases the volume of low- and high-frequency signals, while
keeping the amplitude of the 1-kHz reference frequency constant. The
intended loudness has to be set according to the actual volume setting.
Because loudness introduces gain, it is not recommended to set loudness to a
value that, in conjunction with volume, would result in an overall positive gain.
The settings should be: max (bass, treble) + loudness + volume
0 dB
The corner frequency for bass amplification can be set to two different values.
In Super Bass mode, the corner frequency is shifted up. The point of constant
volume is shifted from 1 kHz to 2 kHz.
LDNESS
Table 3–16:
Codec control registers on I
2
C subaddress 6C
hex
, continued
Register
Address
(hex)
Function
Name
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