MSM7654 Datasheet, PDF (18/53 Pages) OKI electronic componets – NTSC/PAL Digital Video Encoder

¡ Semiconductor
MSM7654
Valid Data Range
According to the ITU-R BT.656 standard, the pixel data immediately from SAV (4th word) to a
fixed value before EVA is valid.
The following figure shows the relationship between the input data at the ITU-R BT.656 format
and the sync, luminance, chrominance signals which are processed inside the encoder.
Note) The values in parenthesis indicate values in PAL mode.
ITU-R BT.656 standard input data
1716TCLKX2 (NTSC)/1728TCLKX2 (PAL)
144TCLKX2 (NTSC/PAL)
Cb0, Y00, Cr0, Y01, Cb1, Y10, Cr1, Y11....
4TCLKX2
Sync signal VSYNC_L (0H)
generated by input signal
Sync signal VSYNC_L (1/2H)
generated by input signal
Sync signal HSYNC_L generated
by input data
11TCLKX1 (4TCLKX1)
4TCLKX2
63TCLKX1 (63TCLKX1)
9TCLKX1 (16TCLKX1)
Sync signal BLANK_L generated
by input data
127TCLKX1 (142TCLKX1)
136TCLKX1 (146TCLKX1)
1/2H
4TCLKX1
(4TCLKX1)
711TCLKX1 (702TCLKX1)
20TCLKX1 (20TCLKX1)
Luminance signal separated from
input data
Chrominance signal separated
from input data
8'h10
8'h80
Y00 Y01 Y10 Y11
Cb0 Cr0 Cb1 Cr1
1H
8'h10
8'h80
Composite signal
Relationship between input data and sync signal, luminance signal, chrominance signals
18/52