saa7134hl NXP Semiconductors, saa7134hl Datasheet - Page 15

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

Philips Semiconductors
SAA7134HL_4
Product data sheet
6.2 Application examples
Audio, video and transport streams are collected in a configurable FIFO with a total
capacity of 1 kB. The DMA controller monitors the FIFO filling degree and master-writes
the audio and video stream to the associated DMA channel. The virtual memory address
space (from OS) is translated into physical (bus) addresses by the on-chip hardware
Memory Management Unit (MMU).
The application of the SAA7134HL is supported by reference designs and a set of drivers
for the Windows operating system (Windows driver model compliant).
The SAA7134HL enables PC TV capture applications both on the PC motherboard and
on PCI add-on TV capture cards.
add-on card applications.
Figure 5
proposed tuner types incorporate the RF tuning function and the IF downconversion.
Usually the IF downconversion stage also includes a single channel and analog sound
FM demodulator. The Philips tuner FI1216MK2 is dedicated to the 50 Hz system
B/G standard as used in Europe. The FI1236MK2 is the comparable type for the 60 Hz
system M standard for the USA. Both types are suited for terrestrial broadcast and for
cable reception. The tuner provides composite video and baseband audio as mono or
‘multiplexed’ (mpx) in case of BTSC. These analog video and sound signals are fed to the
appropriate input pins of the SAA7134HL.
Further analog video input signals, CVBS and/or Y-C, can be connected via the board
back-panel, or the separate front connectors, e.g. from a camcorder. Accompanying
stereo audio signals can also be fed to the SAA7134HL.
Video is digitized and decoded to YUV. TV sound is digitized and decoded to stereo audio,
according to NICAM or dual FM standards. The digital streams are pumped via DMA into
the PCI memory space.
The SAA7134HL incorporates means for legacy analog audio signal routing. The on-chip
audio DACs convert the digital decoded stereo signal into analog audio. This analog audio
input signal is fed via an analog audio loop back cable into the line-in of a legacy sound
card. An external audio signal, that would have otherwise connected directly to the sound
card, is now routed through the SAA7134HL. This analog pass-through is enabled as
default by a system reset, i.e. without any driver involvement and before system setup.
During the power-up procedure, the SAA7134HL will investigate the on-board EEPROM
to load the board specific system vendor ID and board version ID into the related places of
the PCI configuration space. The board vendor can store other board specific data in the
EEPROM that is accessible via the I
shows the basic application to capture video from analog TV sources. The
Rev. 04 — 31 March 2006
Figure 5
2
C-bus.
and
PCI audio and video broadcast decoder
Figure 6
illustrate some examples of
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
SAA7134HL
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