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© 2025 Maktab-e-Digital Systems Lahore
Licensed under the Apache 2.0 License.

Overview

The JPEG Encoder project converts raw RGB images into JPEG compressed format using a hardware-based encoder implemented in SystemVerilog.
It is designed for real-time, low-power applications in embedded systems.

Compression Example

Before Compression vs After Compression

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Workflow Flowchart

Flowchart

Overall flow of JPEG Compression Steps

Why JPEG?

Reduces file size by discarding perceptually insignificant data
Enables fast transmission and efficient memory use
Maintains high visual fidelity
Universally supported across hardware/software platforms

Repository Structure

The project is organized into RTL design, Testbenches, and SDK utilities.

Folder	Description
rtl/	Core SystemVerilog modules for JPEG encoder: • Color Conversion: `rgb2ycbcr` • DCT: `y_dct`, `cb_dct`, `cr_dct` (+ `_constants.svh`) • Quantizers: `y_quantizer`, `cr_quantizer`, `cb_quantizer` (+ `_constants.svh`) • Huffman: `y_huff`, `cb_huff`, `cr_huff` • Bitstream Handling: `pre_fifo`, `sync_fifo_ff`, `sync_fifo_32`, `ff_checker`, `fifo_out` • Combined: `y_d_q_h`, `cb_d_q_h`, `cr_d_q_h`
testbenches/	Verification modules & input/output test data: • `rgb2ycbcr_tb/` • `dct_tb/` • `quantization_tb/` • `huffman_tb/` • `jpeg_top_TB/` – full encoder verification
sdk/	Scripts & tools for I/O and post-processing: • `testimages/` – raw input images • `output_images/` – compressed results • `scripts/data_in.py` – converts images to 24-bit BGR pixel data (`pixel_data.txt`) • `raw_jpeg_bitstream_to_image/jpeg.py` – merges headers + bitstreams into valid JPEG • `Headers/` – predefined JPEG headers (`.bin`) • `bitstream/` – sample bitstreams (`.hex`) • `docs/` – diagrams & documentation