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CX23880 데이터시트(PDF) 5 Page - Synaptics Incorporated.

부품명 CX23880
상세설명  PCl Audio/Video Broadcast Decoder
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제조업체  CONEXANT [Synaptics Incorporated.]
홈페이지  https://www.synaptics.com/
Logo CONEXANT - Synaptics Incorporated.

CX23880 데이터시트(HTML) 5 Page - Synaptics Incorporated.

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ITU-R 656 4:2:2 Data Output
The CX23880/CX23881 provides a 27 MHz, 8- or 10-bit
ITU-R 656 decoded video output interface to allow
connection of a third-party MPEG-2 encoder or other type
of video codec. This is useful when the host CPU is not
powerful enough to perform such tasks in software, or
when high-quality encoding must be achieved. Please
contact Conexant Application Engineering for a list of
supported third-party video compressors.
TV/FM application example
Features:
• Single-chip capture/record of broadcast TV and radio to PC
• Global video standards support
• Global audio standards support including FM/AM radio
• Many I/O ports to differentiate design
ITU-R 656/VIP 2.0 Pixel Data Input
The CX23880/CX23881 provides a 27 MHz, 8-bit ITU-R 656
decoded video input interface to allow a third-party MPEG-2
decoder or codec to send 4:2:2 data over the PCI bus to
a target video display frame buffer for video overlay.
Alternatively, 480-line progressive scan video from the
CX23490 all-format MPEG-2 decoder may be input to this
port using Video Interface Port (VIP) 2.0-compliant pixel
timing at up to 54 MHz.
Antenna
Cable
Stereo
Audio Out
Tuner
Ant1
Ant2
PCI BUS
C
Y
L
R
C
Y
Serial Bus
Composite or
S-Video In
What is a Broadcast Decoder?
A broadcast decoder is designed to capture and decode the
video and audio portions of any analog TV broadcast
signal. In addition, a broadcast decoder must be able to
address the transition to all-digital broadcasting by offering
a variety of methods to connect to digital TV channel
demodulators. Sufficient I/O must be provided to support
external hardware-based compression of analog video/audio
signals in order to enable storage onto hard disks or CDROM.
Conexant’s broadcast decoder meets these objectives
in the following way:
1) It captures and decodes all variations of NTSC, PAL
and SECAM video standards into digital RGB or YUV
pixel streams.
2) It captures and decodes all broadcast audio standards
used worldwide such as BTSC/DBX, NICAM, A2, EIAJ
and FM/AM, into 48 KHz PCM streams or stereo left
and right audio signals.
3) It facilitates “analog to MPEG” conversion by providing
an 8- or 10-bit ITU-R 656 pixel interface to an external
MPEG 2 encoder for real-time compression. Providing
a streaming host port or MPEG port for DMA of
compressed data to the host or hard disk.
4) It provides a dedicated high-speed streaming MPEG
port that is compatible with ATSC, DVB and ISDB digital
television channel demodulators for DMA to the host
or hard disk.
TV/FM block diagram


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