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5D1 H264 Encoder with 4-Channel A/V Decoder &
12 Channels External VD Inputs for Security
Applications
TW5864B1
TW5864 is a H.264 encoder solution with
integrated 4-channel analog A/V decoders.
TW5864 can be used as a low cost single chip
solution for 4-channel H.264 hardware
compression PC cards, or 16-channel cards by
using additional external TW2866 chips. There are
3 versions of TW5864 that can support no
external video decoder (TW5864A), 4 channel
external video decoders (TW5864B), and 12
channel external video decoders (TW5864C).
TW5864 can also be used in embedded DVR
applications as an AV front-end chip with H264
encoding capability. It can work with existing
H.264 hardcore or DSP based CODECs. In existing
H264 CODECs, performance may be limited due
to limitation in both memory bandwidth and
hardware resources. With the H.264 encoder built
in at the front-end, the number of encoding
channel supported scales with number of
TW5864 chips used. The front-end H264 encoder
offloads the processing from the backend CODECs
to allow higher port count support and allows DSP
resources saved and reserved for product
differentiation features such as video analytic
intelligence.
TW5864 features H.264 baseline level 3
compliant encoder capable of performing up to 5
D1 equivalent video encoding (125 fps for PAL
and 150 fps for NTSC), 17 channel G.726 ADPCM
hardware audio encoder with one channel for two
way audio communication. The H.264 video
encoder supports dual-bitstream compression for
both local storage and network port outputs. It
also features a motion JPEG encoder for up to 25
frames per second shared among all video
channels.
TW5864 integrates 4 A/V decoders. It has 4 CVBS
analog inputs fed into four internal high quality
NTSC/PAL video decoders. In addition, it has 3
digital BT. 656 input, running up to 108 MHz,
capable of receiving up to 12 D1 video channels
from external multi-channel video decoders such
as TW2866 / TW2867. This allows the TW5864 to
1
support a total of 16 video input channels. The
video streams from both on-chip/off-chip video
decoders are fed into H.264 encoder as well as to
external interfaces for preview purpose. The
preview stream can go through either though four
BT. 656 video output interfaces or PCI interfaces.
The four BT 656 ports support both multi-channel
byte or line interleaved output to interface with
various external display solutions.
TW5864 has built-in de-interlacers and OSDs
before encoding is performed. There are also 16
sets of motion detection / night detection / blind
detection engine for channel alarm notification. In
addition, the hardware encoder generated motion
information of each channel is accessible to the
external CPU for analytic purpose. TW5864 also
integrates many sets of scalers for each of the
H264 encoder, MJPEG, and preview paths. Each of
these scalers is independently configured.
TW5864 provides both asynchronous host
interface and PCI interface for external CPU
control and bitstream upload. The PCI interface
can run at 33 or 66 MHz.
•
4 CVBS analog inputs fed into 4 sets of video
decoder accept all NTSC(M/N/4.43) / PAL
(B/D/G/H/I/K/L/M/N/60) standards with auto
detection
•
Integrated video analog anti-aliasing filters and
10 bit CMOS ADCs for each video decoder
•
High performance adaptive 4H comb filters for
all NTSC/PAL standards
•
IF compensation filter for improvement of color
demodulation
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Color Transient Improvement (CTI)
•
Automatic white peak control
•
Programmable hue, saturation, contrast,
brightness and sharpness
•
Proprietary fast video locking system for non-
real-time application
•
Noise Reduction to remove impulse noise
Analog Video Decoder
FN7961.0
December 14, 2011
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
TW5864B1
•
Three BT. 656 ports, each running at 108 MHz,
directly interfaced with 3 external TW2866s
•
Byte-interleaving supports 4 channels each port
−
−
Interlaced D1 interface at 60 / 50 fields per
second
Progressive D1 interface at 30 / 25 frames
per second
Digital Input Ports
Host Interface
•
Pre-processing
•
Per channel triple high performance
downscalers of each channel scales
independently for H264, JPEG and preview
output
•
Per channel motion detector with 16 X 12 cells
−
−
−
Single Box
1-bit per pixel text
12-bit per pixel bitmap
•
Configurable 32-bit asynchronous host interface
/ PCI interface
•
PCI Interface runs as both initiator and target at
33 / 66 MHz
•
Per channel night / blind detections
•
Per channel de-interlacer to convert Interlaced
video into progressive before compression
•
Per channel OSD for information overlay
•
Motion vector granularity at full pel, ½ pel, and
¼ pel
•
Motion vector ranges [-256, +255.75]
•
In-loop de-blocking filter
•
CAVLC entropy coding
•
Per MB type / motion information
•
16x12 cells motion detection information
•
Accessible through PCI / Async Host Interface
Motion JPEG Encoder
Video Analytic Interface
•
Digital Output Ports
•
Preview video for external display chips
•
Four BT. 656 ports for preview raw video output
•
Byte-Interleaving interlaced D1 for all ports at 27
or 108 MHz
•
Line-interleaving for the first 2 ports capable of
supporting mix of interlaced D1 and CIF format
at 27, 54, 81, or 108 MHz
•
H.264 baseline profile @ level 3 encoding
•
Bit rate from 64 kbps up to 10 mbps each
channel
•
Maximum 125 fps (PAL) or 150 fps (NTSC)
•
Real-time 4 D1 / 16 CIF or non-real-time 16 D1
main stream encoding
•
Real-time 4 CIF / 16 QCIF or non-real-time 16
CIF secondary stream encoding
•
VBR / CBR controllable
•
Configurable GOP interval
Digital Audio CODEC
H.264 Video Encoder
•
Maximum of 25 fps, shared among all channels
•
Support picture sizes of D1, CIF, and half-D1
•
Integrated five audio ADCs and one audio DAC
providing multi-channel audio mixed analog
output
•
Supports a standard I2S interface for record
output and playback input
•
PCM 8/16 bit and u-Law/A-Law 8bit for audio
word length
•
Programmable audio sample rate that covers
popular frequencies of 8/16/32/44.1/48kHz
•
Video through PCI supporting various preview
resolution such as
−
−
−
−
−
2 D1
1 D1 + 4 CIF
9 CIF
16 QCIF
1 D1 + 15 QCIF
Analog Audio CODEC
•
Hardware G.726 ADPCM encoder
•
Encodes maximum of 17 channels, with 1
channel for two way communication
•
Decodes 1 channel of audio for playback
•
RTC for AV sync
DDR Interface
•
I2C Interface for external Video Decoder chips
configuration
•
IRQs and GPIOs
•
Single 27 MHz external crystal clock input
•
3 built-in PLLs for internal clock generation
Package
System Clock
•
Two 16-bit external DDR SDRAM memories
•
Running at 166 MHz
•
Total 256 MB up to 1 GB
•
Auto refresh
•
352 BGA
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Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent
rights of Intersil or its subsidiaries.
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