參數(shù)資料
型號(hào)： SAA2520
廠商： NXP Semiconductors N.V.
元件分類： Codec
英文描述： Stereo filter and codec for MPEG layer 1 audio applications
中文描述： 過濾器和立體聲的MPEG編解碼器1層音頻應(yīng)用
文件頁(yè)數(shù)： 22/36頁(yè)
文件大?。?/td> 151K
代理商： SAA2520
August 1993
22
Philips Semiconductors
Preliminary specification
Stereo filter and codec for MPEG layer 1
audio applications
SAA2520
Bits D0 to D3 are copied directly to the corresponding
output pins/mode flip-flop.
For HOLDCLKOK = logic 1. When CLKOK drops it will
remain LOW until set by an encode/decode mode, sample
frequency, external 256FS or bit rate index change.
Note 1.
When D0 = logic 1 (default) I
2
S mode is selected. For D0
= logic 0 the alternative mode is selected. The setting of D0
remains dormant until activated by the occurrence of
FRESET.
A
LLOCATION
/S
CALE
F
ACTOR
I
NFORMATION
(LTCNT1 =
LOGIC
0, LTCNT0 =
LOGIC
1)
For encoding, the allocation and scale factor arrays can be
filled using this mode. To completely fill the allocation array
16 complete transfers of 16-bits are required. After the first
transfer of allocation information a check must be made to
determine when the SAA2520 is ready to receive the
remaining information. This will ensure synchronization
with the internal program of the SAA2520. Transfer of the
allocation information is completed by sending the internal
settings.
This is then followed by the scale factor information.
In the event that only internal settings information is sent,
then a default allocation of logic 0 will be assigned to all
sub-bands. If in addition no internal settings are sent then
the previous settings remain valid.
The allocation information is transferred in 4-bit units.
Each of these units contains the number of bits allocated
to the sub-band, MINUS 1, except in the case of a logic 0
value, which indicates that no bits are allocated to that
sub-band.
Scale factor information is transferred in units of 8-bits,
containing the 6-bit scale factor which is extended to 8-bits
by adding two logic 0’s at the most significant end.
In the case of stereo encoding the channels are indicated
by L (left) and R (right). This changes to I and II in the case
of 2 channel mono encoding.
Table 6
Allocation information format.
Table 7
Scalefactor information format.
msb
bits
lsb
channel
sub-band
B15
B11
B7
B3
-
-
-
-
B14
B10
B6
B2
-
-
-
-
B13
B9
B5
B1
-
-
-
-
B12
B8
B4
B0
L or I
R or II
L or I
R or II
0 .. 30 (even)
0 .. 30 (even)
1 .. 31 (odd)
1 .. 31 (odd)
msb
bits
lsb
channel
sub-band
B15
B7
................
................
B8
B0
L or I
R or II
0 .. 31
0 .. 31
相關(guān)PDF資料
PDF描述
SAA3004 Remote control transmitter
SAA3004P Remote control transmitter
SAA3004T Remote control transmitter
SAA3007 INFRARED REMOTE CONTROL TRANSMITTER (LOW VOLTAGE)
SAA3007P INFRARED REMOTE CONTROL TRANSMITTER (LOW VOLTAGE)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA2520GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Stereo filter and codec for MPEG layer 1 audio applications
SAA2521 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Masking threshold processor for MPEG layer 1 audio compression applications
SAA2521GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Masking threshold processor for MPEG layer 1 audio compression applications
SAA2531DEB 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic
SA-A2870-FREQ 制造商:NEL 制造商全稱:Nel Frequency Controls,inc 功能描述:Differential Positive ECL (DPECL)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*