Takanori Hayashi

Title: Takanori Hayashi: Innovator in Video and Audio Quality Estimation

Introduction

Takanori Hayashi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of video and audio quality estimation, holding a total of 7 patents. His work focuses on enhancing the accuracy of quality assessments for encoded video and audio data.

Latest Patents

Hayashi's latest patents include a video quality estimation apparatus, video quality estimation method, and program. This invention provides a video quality estimation apparatus that includes a packet analysis unit, which derives the bit rate of an encoded video packet contained in an input packet. It also features a video subset frame characteristic estimation unit that derives the frame characteristic of each video frame type from the bit rate. Additionally, an encoding quality estimation unit derives a video quality value that quantitatively represents the quality of encoded video data affected by encoding degradation. This apparatus performs more accurate video quality estimation by considering the bit amount of each video frame type.

Another notable patent is the audio quality estimation method, audio quality estimation apparatus, and computer-readable recording medium recording a program. This audio quality estimation apparatus includes an audio packet loss frequency calculation unit that calculates an audio packet loss frequency based on information from received IP packets. It also features an average influence time calculation unit that calculates the average time during which audio quality is influenced when the audio packet loss frequency is 1. Furthermore, a subjective quality assessment value estimation unit estimates a subjective quality assessment value based on the audio packet loss frequency and average influence time.

Career Highlights

Throughout his career, Takanori Hayashi has worked with notable companies such as Nippon Telegraph and Telephone Corporation and NEC Corporation. His experience in these organizations has contributed to his expertise in video and audio technologies.

Collaborations

Hayashi has collaborated with several professionals in his field, including Kazuhisa Yamagishi and Noritsugu Egi. These collaborations have likely enriched his work and led to innovative advancements in quality estimation technologies.

Conclusion

Takanori Hayashi is a distinguished inventor whose work in video and audio quality estimation has made a significant impact in the industry. His innovative patents and collaborations reflect his commitment to advancing technology in these fields.