參數(shù)資料
型號(hào)： SAA7374GP
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 消費(fèi)家電
英文描述： Low voltage digital servo processor and Compact Disc decoder CD7LV
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： 14 X 14 MM, 2.70 MM HEIGHT, PLASTIC, MS-022, SOT-393-1, QFP-64
文件頁(yè)數(shù)： 15/60頁(yè)
文件大?。?/td> 324K
代理商： SAA7374GP
1998 Feb 26
15
Philips Semiconductors
Product specification
Low voltage digital servo processor and
Compact Disc decoder (CD7LV)
SAA7374
7.7.3
C
ONCEALMENT
A 1-sample linear interpolator becomes active if a single
sample is flagged as erroneous but cannot be corrected.
The erroneous sample is replaced by a level midway
between the preceding and following samples. Left and
right channels have independent interpolators. If more
than one consecutive non-correctable sample is found, the
last good sample is held. A 1-sample linear interpolation is
then performed before the next good sample (see Fig.10).
In CD-ROM modes (i.e. the DAC interface is selected to be
in a CD-ROM format) concealment is not executed.
7.7.4
M
UTE
,
FULL
-
SPEED
,
ATTENUATION AND FADE
A digital level controller is present on the SAA7374 which
performs the functions of soft mute, full scale, attenuation
and fade; these are selected via register 0.
Mute: signal reduced to 0 in a maximum of 128 steps;
(3/n)
μ
s.
Attenuate: signal scaled by
12 dB.
Full scale: ramp signal back to 0 dB level. From mute
takes (3/n)
μ
s.
Fade: activates a 128 stage counter which allows the
signal to be scaled up/down by 0.07 dB steps
128 = full scale.
120 =
0.5 dB (i.e. full scale if oversampling filter
used).
32 =
12 dB.
0 = mute.
7.7.5
P
EAK DETECTOR
The peak detector measures the highest audio level
(absolute value) on positive peaks for left and right
channels. The 8 most significant bits are output in the
Q-channel data in place of the CRC bits. Bits 81 to 88
contain the left peak value (bit 88 = MSB) and
bits 89 to 96 contain the right peak value (bit 96 = MSB).
The values are reset after reading Q-channel data via
SDA.
Fig.10 Concealment mechanism.
Interpolation
Hold
Interpolation
MGA372
OK
Error
OK
Error
Error
Error
OK
OK
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7376 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7
SAA7377 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7
SAA7377GP 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Digital servo processor and Compact Disc decoder CD7
SAA7377GP/M1,518 功能描述:IC DIGITAL PROCESSOR/CD7 64QFP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064
SAA7378GP 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single Chip Digital Servo Processor and Compact Disc Decoder
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