- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359422 > VS1003 (Electronic Theatre Controls, Inc.) MP3 / WMA AUDIO CODEC PDF資料下載
參數(shù)資料
| 型號： | VS1003 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | Codec |
| 英文描述： | MP3 / WMA AUDIO CODEC |
| 中文描述： | MP3播放/ WMA音頻編解碼器 |
| 文件頁數(shù)： | 30/57頁 |
| 文件大?。?/td> | 456K |
| 代理商： | VS1003 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁當(dāng)前第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
VLSI
Solution
y
VS1003 PRELIMINARY
VS1003
8. FUNCTIONAL DESCRIPTION
SM STREAM activates VS1003’s stream mode. In this mode, data should be sent with as even intervals
as possible (and preferable with data blocks of less than 512 bytes), and VS1003 makes every attempt
to keep its input buffer half full by changing its playback speed upto 5%. For best quality sound, the
average speed error should be within 0.5%, the bitrate should not exceed 160 kbit/s and VBR should not
be used. For details, see Application Notes for VS10XX. This mode does not work with WMA files.
SM DACT defines the active edge of data clock for SDI. When ’0’, data is read at the rising edge, when
’1’, data is read at the falling edge.
When SM SDIORD is clear, bytes on SDI are sent as a default MSb first. By setting SM SDIORD, the
user may reverse the bit order for SDI, i.e. bit 0 is received first and bit 7 last. Bytes are, however, still
sent in the default order. This register bit has no effect on the SCI bus.
Setting SM SDISHARE makes SCI and SDI share the same chip select, as explained in Chapter 7.2, if
also SM SDINEW is set.
Setting SM SDINEW will activate VS1002 native serial modes as described in Chapters 7.2.1 and 7.4.2.
Note, that this bit is set as a default when VS1003 is started up.
ByactivatingSM ADPCMandSM RESETatthesametime, theuserwillactivateIMAADPCMrecord-
ing mode. More information is available in the Application Notes for VS10XX.
If SM ADPCM HP is set at the same time as SM ADPCM and SM RESET, ADPCM mode will start
with a high-pass filter. This may help intelligibility of speech when there is lots of background noise.
The difference created to the ADPCM encoder frequency response is as shown in Figure 13.
0
500
1000
1500
2000
2500
3000
3500
4000
20
15
10
5
0
5
VS1003 AD Converter with and Without HP Filter
Frequency / Hz
A
No HighPass
HighPass
Figure 13: ADPCM Frequency Responses with 8kHz sample rate.
SM LINE IN is used to select the input for ADPCM recording. If ’0’, microphone input pins MICP and
MICN are used; if ’1’, LINEIN is used.
Version 0.92,
2005-06-07
30
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VS100 | Interface IC |
| VS100AE | CAMERA MONOCHROME |
| VS1024 | AREA CCD IMAGE ARRAY |
| VS10P05 | Direct ProTek Replacement:VS10P05 |
| VS10P05C | Direct ProTek Replacement:VS10P05C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VS1003-BB | 制造商:Distributed By MCM 功能描述:VS1003 MP3/WMA BREAKOUT BOARD |
| VS1003B-L | 制造商:CONSONANCE 制造商全稱:CONSONANCE 功能描述:芬蘭VLSI廠家生產(chǎn)的音頻編解碼芯片 |
| VS100-48 | 制造商:TDK-Lambda Corporation 功能描述:105.6W AC To DC Switching Power Supply - 85-132V/110-175V in - 48V 2.2A out |
| VS1005 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:此產(chǎn)品是芬蘭VLSI剛剛研發(fā)成功的音頻編解碼芯片樣品 |
| VS100AE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CAMERA MONOCHROME |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。