AL9V576 MPEG-4/2/1 Audio/Video Encoder

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Product Information

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 umcompressed ITU-R BT.656, ITU-R BT.601, 16-bit YCbCr, or 24bit YCbCr/RGB digital video. 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, and MPEG-2 audio formats. AL9V576 multiplexes the video and audio streams as transport streams for network applications or program streams for storage applicaitons.


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
2-Wire Serial bus (master mode)
Variable resolution from QCIF to full D1
Internal vertical and horizontal scaling down filters
Variable or constant bit rate (VBR/CBR) up to 20Mbps
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 16K, 22.05K, 24K, 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, ITU-R BT.601, 16-bit YCbCr, or 24bit YCbCr/RGB digital video
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


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AL9V576 MPEG-4/2/1 Audio/Video Encoder