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参数资料
| 型号： | TC90A92AFG |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件页数： | 33/34页 |
| 文件大小： | 459K |
| 代理商： | TC90A92AFG |
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TC90A92AFG
(4) TV system detection for CVBS and S input
TV system auto detection is set via register [AUTODET] at sub address 00 hex.
00 : forced TV mode (color system is set via [TVM ] at sub address 00 hex.
It is fixed to color system which is selected by [Select FSC], [Select FV], [Select PAL], [Select SECAM].
When there is difference between selected TV system and input TV system, it can’t detect fsc signal for read
mode.
There is no relation to setting [Select FV] and input signal gives priority.
01 : European mode (fsc detection : 4.43MHz / 3.58MHz)
Color system is determined by result of vertical frequency detection, fsc detection, SECAM detection.
The order of priority for distinction is 4.43PAL, NTSC, SECAM, ACK.
10 : South American mode (fsc detection : 3.57954MHz /3.5756MHz /3.5820MHz)
Color system is determined by result of fsc detection, vertical frequency detection.
The order of priority for distinction is 3.58PAL, 3.58NTSC, ACK.
11 : full multi mode
Color system is determined by result of vertical frequency detection, fsc detection, SECAM detection.
The order of priority for distinction is PAL, NTSC, SECAM, ACK.
And the distinction of 50/60Hz are independently, there is no priority.
(In case of non signal, it keeps the value of last time.)
(5) Sync processing
TC90A92AFG has a H/V sync separation circuit and regenerates HD/VD pulse.
The phase of HD and VD signals are selectable. (Adapt to 656 format and synchronized with input signal
phase)
(6) Y/C separation and noise reduction
TC90A92AFG has an adaptive comb filter and noise reduction circuit.
M-NTSC : Motion adaptive 3D comb (The sensitivity of motion detection for Y & C are set independently.)
Other color system (Not M-NTSC and not SECAM) : 3D YNR and CNR after 3line comb
SECAM : BPF+3D YNR. 3D CNR is simple motion (Not edge detection).
The function is shown in a table-1.
Input signal
TV signal
Field
Frequenc
y
CVBS
S
YCbCr
PAL
2DYCS+3DYNR+3DCNR
3DYNR+3DCNR
|
N PAL
2DYCS or BPF+3DYNR+3DCNR
3DYNR+3DCNR
|
SECAM
BPF +3DYNR
3DYNR
|
NTSC-50
2DYCS or BPF+3DYNR+3DCNR
3DYNR+3DCNR
Component-5
0
50Hz
|
3DYNR+3DCNR
M NTSC
3DYCS
or
2DYCS+3DYNR+3DCNR
3DYNR+3DCNR
|
4.43NTSC
2DYCS or BPF+3DYNR+3DCNR
3DYNR+3DCNR
|
M PAL
2DYCS or BPF+3DYNR+3DCNR
3DYNR+3DCNR
|
PAL-60
2DYCS or BPF+3DYNR+3DCNR
3DYNR+3DCNR
|
SECAM-60
BPF +3DYNR
3DYNR
Component-6
0
60Hz
|
3DYNR+3DCNR
Table-1
Note : Field noise reduction for 625 system
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