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JPEG Baseline encoder (Color, Grayscale, HD, UHD)
The JPEG core is intended for high-speed encoding of gray-scale, colour or multi-scan images coded with ISO/IEC 10918-1 baseline coding standard. The encoder supports all features of the baseline standard, including restart markers, DNL, user-definable comments and application markers. It is able to encode abbreviated-format or full-format images, with pre-defined default entropy and quantization tables if preferred.
Its autonomous behaviour, its simple FIFO-like interfaces and its 100% synchronous structure allow to integrate it very easily in a complex system with few effort. This is reinforced by the stand-alone ability of the encoder that allows to instanciate it in systems with few CPU intervention.
Its autonomous behaviour, its simple FIFO-like interfaces and its 100% synchronous structure allow to integrate it very easily in a complex system with few effort. This is reinforced by the stand-alone ability of the encoder that allows to instanciate it in systems with few CPU intervention.
Features
- High-speed sustained single clock cycle per pixel component encoding
- Single clock cycle Huffman encoding
- 100 % baseline ISO/IEC 10918-1 JPEG compliance for colour images (single- and multi-scan formats) extending to effective 255-scan support
- Full header building capability and automatic internal Huffman and quantization tables programming based on header data
- Full JPEG format and abbreviated format support, including restart markers and restart interval
- One-pass encoding scheme with bit rate regulation if enabled
- Simple FIFO interfaces for compressed data (32 bits) and pixel interfaces (8 bits)
- Simple CPU interface for encoder and headers programming
- Easy-to-use status and control interface
- Programmable external interrupt for event follow-up
- Four entropy tables (two DC, two AC), four quantization tables
- Burst image-sequence encoding support for images with identical tables
- 8 bits/pixel component
- 8x8 block-format pixel input with classical scan order (row by row from left to right)
- Fully synchronous hardware design
- Fully stallable compressed-data and pixel interfaces
- Throughputs ranging from sub CIF 25Hz to SDTV to HDTV1280x720 50Hz
Deliverables
- Datasheet
- Constraint files
- Netlist (Xilinx/Altera)
- Source code (on demand)
- Testbenches
Applications
- Video camera compression
- Image sensor encoding
- Archiving
- Datacenter
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