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參數(shù)資料
| 型號： | SAA2501 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Digital Audio Broadcast DAB decoder |
| 中文描述： | 數(shù)字音頻廣播民建聯(lián)的解碼器 |
| 文件頁數(shù)： | 20/52頁 |
| 文件大?。?/td> | 206K |
| 代理商： | SAA2501 |
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January 1995
20
Philips Semiconductors
Preliminary specification
Digital Audio Broadcast (DAB) decoder
SAA2501
Table 10
Signals of filter data interface
SIGNAL
DIRECTION
FUNCTION
FDAO
FDEF
FDAI
SCK
WS
FDFSY
output
output
input
output
output
output
filter data output
filter data error flag
filter data input (optionally processed)
filter data (output/input common) bit clock; I
2
S clock output
filter data (output/input common) word select; I
2
S
filter data output frame synchronization
Fig.12 Filter data serial transfer format.
handbook, full pagewidth
WS
SCK
FDAO
1
left sample
2
24
MSB
LSB
25
26
32
FDAI
1
right sample
2
MSB
FDFSY
WS
MLC400
0
1
2
30
31
0
1
sub-band
L
R
L
R
valid data
undefinied data
Two sub-band samples (one per channel) are transmitted
per sample period with output FDAO. The transmission
pattern of the samples S [sb, ch] (sb: sub-band index; ch:
channel) is: S [0, L], S [0, R], S [1, L], S [1, R],..., S [31, R],
S [0, L], S [0, R], etc. Word select signal WS indicates the
channel of each sample (WS is also used for the baseband
audio output interfacing).
The sub-band sample bit clock SCK has a frequency of 64
times the sample frequency. The sub-band samples are
transmitted in 24 bit two's complement Pulse Code
Modulation (PCM) form, MSB first. Thus, of the available
32 FDAO bits per sample per channel, only 24 are used.
The MSB of a sample follows one SCK period after each
transition in WS. The 8 unused bits between individual
samples in FDAO are zero (SCK is used for the baseband
audio output interface as well). The optionally processed
sub-band data signal is fed back as input FDAI in a similar
format as FDAO, but now the 8 unused bits between
individual samples are undefined; they are neglected by
the SAA2501.
A leading edge in signal FDFSY indicates the start of each
FDAO frame. The length of each FDFSY pulse is one
sample period; FDFSY is HIGH during a S[0,L] and S[0,R]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA2501H | Digital Audio Broadcast DAB decoder |
| SAA2502 | ISO/MPEG Audio Source Decoder |
| SAA2502H | ISO/MPEG Audio Source Decoder |
| SAA2503 | MPEG2 audio decoder(MPEG2 音頻譯碼器) |
| SAA2503HT | MPEG2 audio decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA2501H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Audio Broadcast DAB decoder |
| SAA2501HB-S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Audio Decoder & Support |
| SAA2502 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder |
| SAA2502H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder |
| SAA2503 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG2 audio decoder |
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