參數(shù)資料
型號: SAA4956TJ
廠商: NXP SEMICONDUCTORS
元件分類: 存儲器
英文描述: 2.9-Mbit field memory with noise reduction
中文描述: SPECIALTY MEMORY CIRCUIT, PDSO40
封裝: PLASTIC, SOJ-40
文件頁數(shù): 11/36頁
文件大小: 243K
代理商: SAA4956TJ
1998 Dec 08
11
Philips Semiconductors
Preliminary specification
2.9-Mbit field memory with noise reduction
SAA4956TJ
7.2
Noise reduction function
Fig.3 Block diagram of noise reduction.
Switch position is off.
handbook, full pagewidth
8
×
+
+
+
data input
D11(Y7) to D4(Y0)
8
D-field delay
D11(Y7) to D4(Y0)
8
D to memory
D11(Y7) to D4(Y0)
new Y
old Y
delta Y
LF delta Y
LOW-PASS
FILTER 1
LOW-PASS
FILTER 2
NOISE SHAPE
ABS/LIMITER
LUT
I
2
C-bus control:
Yadapt_gain
I
2
C-bus control:
noise_shape
I
2
C-bus control:
lumafix
+
Kluma
Klumafix
processed Y
4
×
×
×
+
+
+
data input
D0(V0), D1(V1)
D2(U0), D3(U1)
4
D-field delay
D0(V0), D1(V1)
D2(U0), D3(U1)
new U/V
old U/V
delta U/V
LF delta U/V
HF
delta
U/V
HF
delta
Y
LOW-PASS
FILTER 1
LOW-PASS
FILTER 2
U/V
AVERAGE
NOISE SHAPE
ABS/LIMITER
LUT
I
2
C-bus control:
unfiltered
I
2
C-bus control:
chroma_inverted
DPCMin
I
2
C-bus control:
Cadapt_gain
I
2
C-bus control:
noise_shape
I
2
C-bus control:
chromafix and
Klumatochroma
REFORMATTER
REFORMATTER
+
4
D to memory
D0(V0), D1(V1)
D2(U0), D3(U1)
FORMATTER
I
2
C-bus control:
DPCMout
MGR689
Kchromafix
Kluma
Kchroma
processed U/V
I
2
C-bus control:
unfiltered
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