Electronics and Telecommunications Research Institute

Kwangwoon University Industry-Academic Collaboration Foundation

Yonsei University

Wilus Institute of Standards and Technology Inc.

Seungkwon Beack

Kyeongok Kang

Jeongil Seo

Jin Woo Hong

Chieteuk Ahn

Tae Jin Lee

Dae Young Jang

Young-cheol Park

Ho Chong Park

Min Soo Kim

Hyunoh Oh

Taegyu Lee

Yongju Lee

Youngcheol Park

Daehee Youn

Daeyoung Jang

Jinwoong Kim

Kwangki Kim

Minsoo Hahn

Min Je Kim

Jinwoo Hong

A Unified Speech and Audio Codec (USAC) that may process a window sequence based on mode switching is provided. The USAC may perform encoding or decoding by overlapping between frames based on a folding point when mode switching occurs. The USAC may process different window sequences for each situation to perform encoding or decoding, and thereby may improve a coding efficiency.

Unified speech/audio codec (USAC) processing windows sequence based mode switching

The present invention relates to a method and an apparatus for binaural rendering an audio signal using variable order filtering in frequency domain. To this end, provided are a method for processing an audio signal including: receiving an input audio signal; receiving a set of truncated subband filter coefficients for filtering each subband signal of the input audio signal, the set of truncated subband filter coefficients being constituted by one or more FFT filter coefficients generated by performing FFT by a predetermined block size; generating at least one subframe for each subband; generating at least one filtered subframe for each subband; performing inverse FFT on the filtered subframe for each subband; and generating a filtered subband signal by overlap-adding the transformed subframe for each subband and an apparatus for processing an audio signal using the same.

Method and apparatus for binaural rendering audio signal using variable order filtering in frequency domain

A multi-object audio encoding and decoding apparatus supporting a post downmix signal may be provided. The multi-object audio encoding apparatus may include: an object information extraction and downmix generation unit to generate object information and a downmix signal from input object signals; a parameter determination unit to determine a downmix information parameter using the extracted downmix signal and the post downmix signal; and a bitstream generation unit to combine the object information and the downmix information parameter, and to generate an object bitstream.

Multi-object audio encoding and decoding apparatus supporting post down-mix signal

The present invention relates to a method and an apparatus for processing a signal, which are used to effectively reproduce an audio signal, and more particularly, to a method for generating a filter for an audio signal, which are used for implementing a filtering for input audio signals with a low computational complexity and a parameterization apparatus therefor. To this end, provided are a method for generating a filter of an audio signal, including: receiving at least one proto-type filter coefficient for filtering each subband signal of an input audio signal; converting the proto-type filter coefficient into a plurality of subband filter coefficients; truncating each of the subband filter coefficients based on filter order information obtained by at least partially using characteristic information extracted from the corresponding subband filter coefficients, the length of at least one truncated subband filter coefficients being different from the length of truncated subband filter coefficients of another subband; and generating FFT filter coefficients by fast Fourier transforming (FFT) the truncated subband filter coefficients by a predetermined block size in the corresponding subband and a parameterization unit using the same.

Method for generating filter for audio signal and parameterizing device therefor

Unified speech/audio codec (USAC) windows sequence based mode switching

Unified Speech/Audio Codec (USAC) processing windows sequence based mode switching

Growing community of inventors

Daejeon, South Korea

Seungkwon Beack