Company Filing History:
Years Active: 1996-2011
Title: Nobuhide Eguchi: Innovator in Audio Coding Technology
Introduction
Nobuhide Eguchi is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the field of audio coding technology, holding a total of 3 patents. His innovative work focuses on optimizing audio coding devices and synchronizing voice coders and decoders.
Latest Patents
Eguchi's latest patents include an audio coding device with a two-stage quantization mechanism. This device optimizes quantization parameters for fast convergence of iterations. A quantized bit counter calculates a codeword length representing the number of bits of a Huffman codeword corresponding to quantized values. Additionally, the quantized bit counter calculates a codebook number bit count and a scale factor bit count. In the first stage of quantization, the quantized bit counter accumulates lengths of Huffman codewords corresponding to quantized values of every nth subband. A bit count estimator calculates a total bit count estimate, and a parameter updater updates quantization parameters if the total bit count estimate exceeds a bit count limit.
Another notable patent is an apparatus for synchronizing a voice coder and a voice decoder of the vector-coding type. This apparatus prevents false synchronization even when a signal with the same period as a string of synchronizing bits is inputted. A noise component adding unit adds a noise component to the input voice signal, ensuring that the periodicity of the input voice signal is lost. This innovation allows for the generation and transmission of code book indexes to a voice decoder, preventing false synchronization.
Career Highlights
Nobuhide Eguchi has worked with notable companies such as Fujitsu Corporation and Fujitsu Semiconductor Limited. His experience in these organizations has contributed to his expertise in audio coding technologies and innovations.
Collaborations
Eguchi has collaborated with esteemed colleagues, including Mitsuru Tsuboi and Naoji Fujino. Their joint efforts have further advanced the field of audio coding and synchronization technologies.
Conclusion
Nobuhide Eguchi is a distinguished inventor whose work in audio coding technology has led to significant advancements in the field. His innovative patents and collaborations highlight his commitment to enhancing audio processing and synchronization.