參數(shù)資料
型號: AK8811
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: NTSC/PAL Digital Video Encoder
中文描述: NTSC / PAL數(shù)字視頻編碼器
文件頁數(shù): 21/36頁
文件大?。?/td> 377K
代理商: AK8811
ASAHI KASEI
[AK8811/12]
Rev.1.1 2000/01
21
AK8811/12 Interface Timing (Part 1) Master mode & ITU-R BT. 656 mode
On ITU-R BT.656 decoding mode or master mode operation, AK8811/12 outputs HSYNC
and FID or VSYNC (selected by register).
When AK8811/12 receives ITU-R BT. 656 signal, AK8811/12 decodes [EAV] code in the data
for synchronization then outputs the HSYNC. AK8811/12 outputs HSYNC at the rising edge
of SYSCLK in the timing of the 32nd/24th(NTSC/PAL) data slot, which is counted from the
[EAV] starting point as below. (See also AC Characteristics
2-2[Input Synchronizing Signal])
On master mode operation, the front device connected with AK8811/12 (ex. MPEG Decoder)
starts to set Cb on the 276th/288th(NTSC/PAL) slot, after starting to count HSYNC falling
edge as 32nd/24th(NTSC/PAL) slot.
FID/VSYNC is output synchronously with HSYNC at the timing of solid line as in Fig. 10
Video Field.
Fig. 8 Interface Timing (ITU-R BT.656 or Master mode)
276
(288)
Cb
Cr
Y
Y
27MHz SYSCLK
HSYNC
ITU-R. BT601(656)
32
(24)
244T
(264T)
NTSC(PAL)
T=1/27MHz
* Uncertainty of 1T occurs
according to the Reset
timing.
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