saa7134hl NXP Semiconductors, saa7134hl Datasheet - Page 27

• Manufacturer Part Number: saa7134hl
• Description: Pci Audio And Video Broadcast Decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SAA7134HL_4
Product data sheet
Fig 10. Scaler task processing with DMA interfacing
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)
3rd field (odd, FID = 0)
1st field (odd, FID = 0)
scaling
scaling
scaling
sample rate
sample rate
sample rate
sample rate
Rev. 04 — 31 March 2006
PCI audio and video broadcast decoder
1st buffer (upper field)
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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)
video DMA (B)
e.g. single FID
SAA7134HL
VBI DMA
mhb998
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