SAA7130 Philips Semiconductors, SAA7130 Datasheet - Page 29

• Manufacturer Part Number: SAA7130
• Description: PCI video broadcast decoder
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2002 Apr 23
handbook, full pagewidth
PCI video broadcast decoder
Two video capture tasks can be processed in an alternating manner, without
need to reprogram any scaling parameters or DMA definition.
alternating processing task A/B
VBI region, raw samples
VBI region, raw samples
VBI region, raw samples
VBI region, raw samples
active video area
active video area
active video area
active video area
video region (B)
- skipped for field rate reduction
video region - scaled down CIF
video region (A) - cropped
video region (A) - cropped
2nd field (even, FID = 1)
4th field (even, FID = 1)
Fig.12 Scaler task processing with DMA interfacing.
3rd field (odd, FID = 0)
1st field (odd, FID = 0)
scaling
scaling
scaling
sample rate
sample rate
sample rate
sample rate
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1st buffer (upper field)
1st buffer (A)
2nd buffer (A)
3rd buffer (B)
4th buffer (B)
2nd buffer (lower field)
video DMA (A)
e.g. interlaced
1st buffer
2nd buffer
(next frame)
VBI DMA
video DMA (B)
e.g. single FID
SAA7130HL
Product specification
MHB998