In Sung Lee

Title: In Sung Lee: Innovator in Speech Coding Technology

Introduction

In Sung Lee is a prominent inventor based in Taejon, South Korea. He has made significant contributions to the field of speech coding technology, holding 2 patents that enhance the quality of speech processing systems. His work focuses on developing algorithms that improve the efficiency and effectiveness of speech coding.

Latest Patents

One of his latest patents is a harmonic-noise speech coding algorithm and coder using cepstrum analysis method. This invention relates to a harmonic-noise speech coder that processes mixed signals of voiced and unvoiced sounds. The coder utilizes a noise spectral estimating means to code the noise component by predicting the spectral through LPC analysis after separating the noise from the inputted LPC residual signal using cepstrum. This method allows for improved speech quality by effectively analyzing noise using a predicted noise spectral model.

Another notable patent is a speech coding system and method using a time-separated coding algorithm. This invention features a time-separated speech coder that codes transitional signals of voiced and unvoiced sounds through harmonic speech coding. The coder includes a transitional excitation signal analyzer and synthesizer that extracts harmonic model parameters after detecting a transitional point. This innovative approach results in enhanced speech quality by increasing the representation capability of transitional signals with large energy variations.

Career Highlights

In Sung Lee is affiliated with the Electronics and Telecommunications Research Institute, where he continues to advance research in speech coding technologies. His work has been instrumental in developing algorithms that significantly improve the quality of speech processing systems.

Collaborations

He has collaborated with notable colleagues, including Hyoung Jung Kim and Jong Hark Kim, contributing to the advancement of technology in their field.

Conclusion

In Sung Lee's innovative contributions to speech coding technology demonstrate his commitment to enhancing communication systems. His patents reflect a deep understanding of the complexities of speech processing, paving the way for future advancements in the field.