Functional
Description
AL9V576 is a real-time
MPEG-4/2/1 video/audio encoder chip that fully complies
with ISO/IEC-11172, ISO/IEC-13818, and ISO/IEC-14496.
The video encoder accepts uncompressed ITU-R BT.656. It
filters the input and compresses the video into
MPEG-4/2/1 formats. The audio encoder accepts two
independent channels of digital audio, filters the
input, and compresses each audio into MPEG-1, layer 2
audio formats. AL9V576 multiplexes the video and audio
streams as transport streams for network applications or
program streams for storage applications. |
Applications
- PCI MPEG-4/2 A/V capture card
- USB 2.0
MPEG-4/2 A/V TV box
- Surveillance PCI capture card
(Multiple-channel)
- IP network camera
- Video
server
- Surveillance DVR
- PVR/ PMP
- MPEG-4
viewer
- Wireless TV
- Network video phone, etc.
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Features
- High quality real-time MPEG-1, MPEG-2 MP@ML, and
MPEG-4 ASP encoding.
- Variable frame rate up to
30fps for NTSC and 25fps for PAL
- Variable
resolution from QCIF to full D1
- Internal
vertical and horizontal scaling down filters
- Variable or constant bit rate (VBR/CBR) up to
8Mbps
- Adaptive rate control and adaptive
quantization algorithms
- Automatic film/scene
change detection
- Variable GOP structure: I, IP,
IBP, IBBP
- Large motion estimation search window
- High quality video pre-processing: both
temporal and spatial filtering
- Vertical/Horizontal luminance/chrominance
filter
- Speckle noise reduction
- Recursive noise reduction
- H/V cropping
- MPEG-1 layer II audio encoding with
psychoacoustic model
- Variable audio sampling
rate 32K, 44.1K, 48K Hz
- Variable audio bit rate
up to 384Kbps
- MPEG-1 System Stream format
- MPEG-2 Program Stream (PS) and Transport Stream
(TS) format
- MPEG-4 elementary stream format
- Recordable VCD/DVD stream format
- ITU-R
BT.656
- Digital audio input
- 8/16/32-bit host interfaces (for 8051,
Intel-style, SRAM-like & PCI)
- 1/8-bit
encoded bit stream output
- 12 GPIO / Interrupt
Multi-function IO pin
- 2-Wire Serial bus (master mode)
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