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参数资料
| 型号： | MAS3519F |
| 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： | 36/92页 |
| 文件大小： | 1186K |
| 代理商： | MAS3519F |
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MAS 35x9F
DATA SHEET
36
June 30, 2004; 6251-505-1DS
Micronas
D0:34d
Operation Mode Selection
(reset = 0
hex
)
The register is used to switch between basic G.729 operation modes.
G.729
bit[19:7]
Reserved, set to 0
bit[6]
Page headers
0
1
enable
disable
If the page headers bit is 0, a header frame is transfered before each page of
50 data frames. If the header bit is 1, all the frames are G.729 data frames.
Please (see Section 3.3.8. on page 44).
bit[5:4]
Decoding speed
00
01
10
11
8 kHz (normal)
6 kHz (slow)
12 kHz (fast)
not allowed
The recording (encoding) is always done with a sampling rate of 8 kHz. During
decoding this control can be used to speed up or slow down the playback.
bit[3]
Reserved, set to 0
bit[2]
Pause encoder/decoder
0
1
normal operation
pause
If the pause bit is set, the processing continues until the current page is fin-
ished and then en-/decoding is paused. The pause mode lasts until the pause
bit is cleared again or the mode is set to 0.
bit[1:0]
Mode
00
01
10
11
idle
decode
not allowed
encode
To switch to
encoder
operation mode, UserControl has to be set to 3
hex
. Then
50 frames are encoded and sent via the PIO interface. This is repeated until
the UserControl register is changed. If the transmission of headers is enabled,
each page of 50 frames is preceeded by a header frame as shown in Fig. 3–4
on page 44.
To switch to
decoder
operation mode, UserControl has to be set to 1
hex
. For
decoding with slow speed, UserControl must be 11
hex
, for decoding with fast
speed it must be 21
hex
. Then the decoder is requesting several frames via the
PIO interface to fill its internal buffer. If enough data is available, 50 frames are
decoded. This is repeated until the UserControl register is changed. If the
transmission of headers is enabled, a header frame has to be sent before
each page of 50 frames (see Fig. 3–4 on page 44).
To switch off the encoder or decoder, UserControl has to be set to 0
hex
. Then
the encoding/decoding and sending/receiving of frames continues until the
end of the current page and the operation mode is set to stop.
UserControl
Table 3–9:
D0 control memory cells, continued
Memory
Address
(hex)
Function
Name
相关PDF资料 |
PDF描述 |
|---|---|
| MAS3529F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3539F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3549F | MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3587F | MPEG Layer 3 Audio Encoder/Decoder |
| MAS7848L | RDS MODEM / MANCHESTER DECODER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAS3529F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3539F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3549F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3559F | 制造商:MICRONAS 制造商全称:MICRONAS 功能描述:MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec |
| MAS3587F | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MPEG Layer 3 Audio Encoder/Decoder |
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