Hung-Chi Fang

Title: Innovations of Inventor Hung-Chi Fang

Introduction

Hung-Chi Fang is a notable inventor based in Taipei, Taiwan. He has made significant contributions to the field of image compression technology, holding 2 patents that showcase his innovative approaches.

Latest Patents

One of his latest patents is titled "Architecture and method for parallel embedded block coding." This invention provides a high-speed, memory-efficient parallel coding technique for embedded block coding with optimized truncation (EBCOT) used in still image compression. The method utilizes a parallel processing technique that allows for the processing of a discrete wavelet transform (DWT) coefficient at a clock cycle without the need for state variable storage. This innovation reduces the requirement for state variable memory and minimizes external memory bandwidth. It achieves a processing rate several times higher than conventional schemes, processing 50 million coefficients per second at 100 MHz, and can encode lossless HDTV 720p resolution pictures at 30 frames per second in real time.

Another significant patent is the "Pre-compression rate-distortion optimization method for JPEG 2000." This method optimizes the compression of still images in JPEG 2000 format. It involves several steps, including dividing an image into tiles, decomposing each tile into subbands using DWT, and minimizing the total rate with a predetermined total distortion of the image. This process allows for the determination of optimal truncation points for each code-block, ultimately reducing computational resources while encoding each code-block by embedded block-coding to form an embedded code-stream.

Career Highlights

Hung-Chi Fang is affiliated with National Taiwan University, where he continues to contribute to advancements in image processing technologies. His work has had a significant impact on the efficiency and effectiveness of image compression methods.

Collaborations

He has collaborated with notable colleagues, including Liang-Gee Chen and Yu-Wei Chang, who have also contributed to the field of image processing.

Conclusion

Hung-Chi Fang's innovative patents and contributions to image compression technology highlight his role as a leading inventor in this field. His work continues to influence advancements in efficient image processing methods.