Company Filing History:
Years Active: 2014-2015
Title: Innovations of Inventor Kaiwen Liu
Introduction
Kaiwen Liu is a prominent inventor based in Shenzhen, China. He has made significant contributions to the field of audio encoding and decoding technologies. With a total of 3 patents, his work focuses on improving audio signal processing methods.
Latest Patents
One of his latest patents is an "Audio-encoding/decoding method and system of lattice-type vector quantizing." This invention provides a method for dividing frequency domain coefficients of an audio signal, which has undergone a modified discrete cosine transform (MDCT), into multiple coding sub-bands. The process includes quantizing and coding the amplitude envelope values of each sub-band to generate coded bits. Additionally, it involves bit allocation, normalization, and coding using pyramid and sphere lattice vector quantization techniques. The final step is multiplexing and packing the coded bits for transmission to the decoding side.
Another notable patent is the "Compensator and compensation method for audio frame loss in modified discrete cosine transform domain." This invention addresses audio frame loss in the MDCT domain by predicting phases and amplitudes of lost frames using data from previous frames. The method calculates the MDCT coefficient values for the lost frames and performs an IMDCT to obtain the corresponding time domain signal.
Career Highlights
Kaiwen Liu is currently employed at ZTE Corporation, a leading telecommunications and information technology company. His work at ZTE has allowed him to develop innovative solutions that enhance audio processing technologies.
Collaborations
Throughout his career, Kaiwen has collaborated with talented individuals such as Zhibin Lin and Ke Peng. These collaborations have contributed to the advancement of his research and the successful development of his patents.
Conclusion
Kaiwen Liu's innovative contributions to audio encoding and decoding technologies demonstrate his expertise and commitment to advancing the field. His patents reflect a deep understanding of audio signal processing, making him a valuable inventor in the industry.