Hiroaki Yamashita

Title: Hiroaki Yamashita: Innovator in Audio Coding and Transaction Processing

Introduction

Hiroaki Yamashita is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the fields of audio coding and transaction processing, holding a total of six patents. His innovative work has led to advancements that enhance the efficiency and effectiveness of digital audio systems and automated transaction apparatus.

Latest Patents

One of his latest patents is an "Audio coding device with fast algorithm for determining quantization step sizes based on psycho-acoustic model." This invention provides an efficient audio coding device that quantizes and encodes digital audio signals with a reduced amount of computation. The device utilizes a spatial transform unit to process audio samples, obtaining transform coefficients. A quantization step size calculator estimates quantization noise and calculates the quantization step size for each subband based on this noise and a psycho-acoustic model. The quantizer then produces quantized values of the coefficients, which are further utilized by a scalefactor calculator.

Another notable patent is the "Transaction degradation processing method for automated transaction apparatus, system for same, and administration server for same." This method simplifies the execution of transaction degradation processing across multiple automated transaction apparatus installations. By connecting an administration server to these apparatus, the need for separate program installations is eliminated, improving program maintainability and facilitating modifications.

Career Highlights

Hiroaki Yamashita has worked with notable companies such as Fujitsu Corporation and Fujitsu Frontech Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to the advancement of technology in his fields of expertise.

Collaborations

Some of his coworkers include Takahiro Kobayakawa and Shinichiro Tsuchiya. Their collaboration has likely played a role in the development of his patents and innovations.

Conclusion

Hiroaki Yamashita's contributions to audio coding and transaction processing demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving technology and enhancing user experiences in digital audio and automated transactions.