Yoshihiro Ariyama

Title: The Innovations of Yoshihiro Ariyama

Introduction

Yoshihiro Ariyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of communication technology, holding a total of 10 patents. His work focuses on enhancing communication devices, particularly in the areas of voice and facsimile transmission.

Latest Patents

One of his latest patents is a communication device that transmits voice and facsimile signals over the same channel between a terminal device and a packet network. This innovative device features an echo canceler and a jitter buffer, which includes a delay recovery control function. This function selectively deletes data from the jitter buffer to recover from packet delays. Upon detecting a facsimile tone, the device waits for a specific interval of silence before deactivating its echo canceler and delay recovery control function, switching into facsimile communication mode. If silence is detected during facsimile transmission, the device reactivates its echo canceler and delay recovery control function, allowing for continued communication in voice mode if the line remains connected.

Another notable patent is a method and apparatus for echo cancellation. This echo canceler generates an echo replica and subtracts it from a local input signal to create a residual signal for outgoing transmission. The echo canceler employs adaptive filters with varying computational accuracy to generate the echo replica. An evaluator, linked to the adaptive filters, groups coefficients into segments and evaluates computational accuracy information based on these coefficients. A computational accuracy controller in the evaluator assigns the local input signal to the adaptive filters and adjusts the coefficients according to the computational accuracy information.

Career Highlights

Yoshihiro Ariyama is currently employed at Oki Electric Industry Co., Ltd., where he continues to innovate in communication technology. His work has significantly impacted the efficiency and effectiveness of communication devices.

Collaborations

He has collaborated with notable coworkers, including Masashi Takada and Hiromi Aoyagi, contributing to various projects and advancements in their field.

Conclusion

Yoshihiro Ariyama's contributions to communication technology through his innovative patents demonstrate his expertise and commitment to enhancing communication devices. His work continues to influence the industry and improve the way we communicate.