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JPEG 2000 

JPEG 2000 INTEL     

JPEG 2000 XILINX     


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JPEG 2000 compression IP-Cores for FPGA

The most powerful and flexible JPEG 2000 implementation available today for capture, production, video over IP, storage and playback. 

intoPIX JPEG 2000 encoding and decoding IP-cores respect and protect images with high intrinsic value. Handling simultaneously deep color precisions, high data rates and extensive JPEG 2000 encoding know-how, intoPIX IP-cores enable best-in-class picture quality.

Being compliant and optimized for the most up-to-date FPGA platforms, intoPIX IP-cores allow achieving unprecedented performances in terms of bit rates, frame rates and resolutions . 

Benefiting from a modular architecture and completed with a wide range of interfaces, memory, security IP-cores, intoPIX solution provides an easy, timely and cost-effective way to implement JPEG 2000 technology.

 

Key Benefits

 

  

  • ISO 15444-1 Compliant : Fully compliant with DCI, Broadcast, IMF and HFR JPEG2000 profiles and support most of the JPEG2000 Part1 features as well as several features from the JPEG2000 Part2. 
  • Silicon Proven  : Largely adopted and deployed within the industry. Thanks to the large range of supported features, its flexible architecture and high level of reliability, it is today largely deployed JPEG2000 FPGA solution in digital cinema projection systems, cameras, production, video over IP servers, contribution , storage, surveillance and defense equipments.
        
  • Ultra Low Latency : to carry HD and UHD streams within the network with a point to point latency below 5 milliseconds while garanteeing high image quality. 
  • HD up to UHD 4K & 8K: Support any resolutions from SD, HD up to 4K and 8K. JPEG2000 IP-cores can be configured to support also very high frame rates and multiple video streams in parallel.
  • Compact implementation : Configured to use a very small FPGA(ASIC) footprint to optimize the BOM. The smallest JPEG2000 IP-cores available today.
  • Raw Bayer pattern image : Can be configured to compress raw images from the camera image sensor output.
  • Lossless quality : Can be configured either to offer a visually lossless compression or a pure mathematically lossless compression 

 

JPEG2000 IP-cores family

 

HD 

IPX-JPHD encoders and decoders
HD JPEG2000 IP-cores for Broadcast production and Low latency Video over IP
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CINEMA
(DCI & HFR)

IPX-JP2K / IPX-JP4K encoders and decoders
CINEMA JPEG2000 IP-cores , DCI and High Frame Rates (HFR) compliant
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LOSSLESS IPX-JP-MLS encoders and decoders
Math. LOSSLESS JPEG2000 IP-cores, ideal for storage and long term preservation
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UHD 4K/8K

IPX-JPUHD encoders and decoders
UHD 4K/8K JPEG2000 IP-cores, to manage the new ultra high definition formats
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CAMERA RAW IPX-JPRAW encoders and decoders 
J2K-RAW Bayer JPEG2000 IP-cores to compress Bayer pattern-images
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     * contact intoPIX for your own custom IP-core configuration.

 

General architecture

JPEG 2000 Encoder IP-core

Multiple Component Transformation (MCT)
The first stage of the encoder is the Multiple Component Transformation, It may be used to improve compression efficiency, by decorreleting the luminance from the chrominance, e.g. converting RGB to YCbCr. 3 modes are accessible: Pass-through, reversible Lossless transform (RCT, prescribed for Lossless encoding)) and the irreversible transform (ICT).. Both, RCT and ICT, transformations are implemented with 18-bit fixed point precision.

Discrete Wavelet Transform (DWT)
A bi-dimensional wavelet decomposition of the sub-bands is performed with either the Le Gall (5/3) filter bank or the Daubechies (9/7) filter bank. The 5/3 filter is recommended for lossless encoding while the 9/7 filter offers a better compression efficiency for lossy encoding. Used with an 18-bit fixed point precision.

Quantizer
The coefficients of the wavelet sub-bands are quantized. The quantization steps are defined by the user and can be different for each sub-band.

Entropy encoder
Each wavelet sub-band is divided into several code-blocks and encoded using an Entropy Encoder. The encoder is divided into two blocks: the Context Modeler and the Arithmetic Encoder. The Context Modeler successively encodes each bitplane of the code-block by sending information describing the neighborhood of each bit to the Arithmetic Encoder. With this information the Arithmetic Encoder encodes each bit in order to generate the compressed bit-stream.

Rate Allocator
In order to maximize image quality within the bitrate boundaries fixed by the user, the Rate Allocator selects the
information encoded by the Entropy Encoder that will be included in the final code stream.

JPEG 2000 Generator
The JPEG 2000 Generator is responsible for generating the final codestream so as to provide a fully compliant JPEG 2000 image. This codestream generator is also responsible for the codestream structure accordingly to the scalability order selected by the user: by Resolution (R), by quality Layer (L), by Position (P) or by Component (C).

External memories
A first memory buffer is used to provide the most efficient DWT processing. This buffer, containing one DDR2/DDR3-SDRAM external memory, enables the encoder to provide a buffer of at least one frame. A second memory buffer is then provided to compute efficiently the rate allocation. This buffer is also based on one DDR2/DDR3-SDRAM memory. The DDR2/DDR3-SDRAM types included will depend on the user specification and required product solution.
An optional memory controller is proposed by intoPIX as Companion IP-Core.

Interfaces
Input and output interfaces are based on FIFO protocols, and a burst of two pixels (in RBG, XYZ or YUV) is required at the input interface.

Process Controller
Taking full advantage of JPEG 2000 intra-frame coding the intoPIX Encoder Process Controller accurately manages the frame stream. When there is no video to encode the processor will continue to provide the latest encoded frame, or stop outputting compressed data according to the user command. This process also configures the different JPEG 2000 options for the full encoding chain.

JPEG 2000 Decoder IP-core 

JPEG 2000 parser
The JPEG 2000 parser analyses the main and tile-part headers of the JPEG 2000 codestream and sends the compressed bit-stream to the entropy decoder.

Entropy decoder
The reconstruction of each wavelet sub-band divided into several code-blocks is achieved by two blocks: the Context Modeller and the Arithmetic Decoder. The Context Modeller successively decodes each bit-plane of the codeblock by sending information describing the neighbourhood of each bit to the Arithmetic Decoder. With this information, the Arithmetic Decoder decodes the bit-stream.

Inverse Quantizer
The coefficients of the wavelet subbands are inverse quantized. The quantization steps are defined in the main header of the JPEG 2000 file and can be different for each subband.

External memory
A frame memory buffer is used at the Inverse Quantizer output and enables an efficient IDWT processing. This buffer, containing a DDR2-SDRAM external memory, always keeps at least one valid frame that can be repeated when convenient.

Inverse Discrete Wavelet Transform (IDWT)
A bidimensional wavelet recomposition of the subbands is achieved. Two filter banks, with a 18-bit fixed point precision, may be used: either the Le Gall (5/3) filter bank prescribed for lossless encoding or either the more complex Daubechies (9/7) filter bank for lossy encoding.

Multiple component transformation (MCT)
In the JPEG 2000 standard, in order to improve compression efficiency, multiple component transformations can be used. Depending on the wavelet filters used, different transformations are defined. The reversible transform (RCT) is used with the 5/3 filter, and the irreversible transform (ICT) with the 9/7 filter. Both transformations are implemented with a 18-bit fixed point precision.

Error Handling
The decoder is designed to detect errors in the input data and detection achieved at the main headers, and at the
coherence of tag trees. When an error is detected, specific error codes are sent to the device managing the decoder. In the case of a corrupted frame codestream, the decoder can try to decode the next frame. This can be repeated until a correct frame is encountered. If no frame can be decoded during the elapsed time determined by the frame rate, the previous correctly decoded frame is sent to the output to prevent display artifact.

Process Control
Taking advantage of the JPEG 2000 intra-frame coding, the decoder controller can manage the stream at the frame accuracy. When there is no data to decode at its input, the decoder can loop on the latest decoded frame, output a black frame or stop to output frames. By controlling the input stream and the output options, the decoder controller can manage pause, step by step, slow-motion, fast forward and rewind, and random access.
Interfaces The input receives data by 32-bit bursts of in Little or Big-Endian representations. A burst of two pixels (RGB, XYZ or YUV) is output. The output clock depends on the sequence frame rate and picture size.

JPEG 2000 compression benefits

  • License-free
  • Improved Compression Efficiency
  • Mathematically Lossless Compression
  • Graceful Degradation
  • Scalability
  • Robust Transmission
  • Easy Post-Production
  • Region of Interest (ROI)
  • Low Latency
  • Constant Quality through Multiple Generations

Our IP-Cores bring together all JPEG 2000 benefits with the hardware compactness and acceleration know-how of intoPIX.

To find out everything you always wanted to know about JPEG 2000, click here 


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