Electronics and Telecommunications Research Institute

Kwangwoon University Industry-Academic Collaboration Foundation

Samsung Electronics Co., Ltd.

Korea Institute of Energy Research

Yonsei University

Young-cheol Park

Tae Jin Lee

Dae Young Jang

Kyeongok Kang

Jeongil Seo

Min Soo Kim

Jin Woo Hong

Hochong Park

Chieteuk Ahn

Jin-Woo Hong

Ho Chong Park

Seung Kwon Beack

Seung-Kwon Baek

Seungkwon Beack

Min Je Kim

Chang-keun Yi

Dong-wook Kim

Sung-ho Jo

Seung-yong Lee

Ho-jung Ryu

Jun-il Sohn

Jae-hyeon Park

Dal-Hee Bae

Tae-Jin Lee

Jeong-Il Seo

Dae-Young Jang

Dong-Gyu Sim

Seung-Kwon Beack

Chang-Beom Ahn

Kyeong-Ok Kang

Jong-Ho Moon

Hee-Yeon Kim

Gyoung-tae Jin

Minje Kim

Heun-Chul Lee

Jong-Jin Kim

Do-won Shun

Hyung-Keun Lee

Yoon-seo Koo

Ho-Chong Park

Hong-Soo Kim

Yun-seo Ku

Seong-Ok Han

Yeo-Il Yoon

Won-Kil Choi

Hang-Dae Jo

Gyong-Tae Jin

Do-Won Sun

Min-Je Kim

Rin-Chul Kim

Seong-Jun Oh

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

Provided is an encoding apparatus for integrally encoding and decoding a speech signal and a audio signal, and may include: an input signal analyzer to analyze a characteristic of an input signal; a stereo encoder to down mix the input signal to a mono signal when the input signal is a stereo signal, and to extract stereo sound image information; a frequency band expander to expand a frequency band of the input signal; a sampling rate converter to convert a sampling rate; a speech signal encoder to encode the input signal using a speech encoding module when the input signal is a speech characteristics signal; a audio signal encoder to encode the input signal using a audio encoding module when the input signal is a audio characteristic signal; and a bitstream generator to generate a bitstream.

Apparatus for encoding and decoding of integrated speech and audio

An encoding apparatus and a decoding apparatus in a transform between a Modified Discrete Cosine Transform (MDCT)-based coder and a different coder are provided. The encoding apparatus may encode additional information to restore an input signal encoded according to the MDCT-based coding scheme, when switching occurs between the MDCT-based coder and the different coder. Accordingly, an unnecessary bitstream may be prevented from being generated, and minimum additional information may be encoded.

Encoding apparatus and decoding apparatus for transforming between modified discrete cosine transform-based coder and different coder

Provided are an apparatus and a method for integrally encoding and decoding a speech signal and a audio signal. The encoding apparatus may include: an input signal analyzer to analyze a characteristic of an input signal; a first conversion encoder to convert the input signal to a frequency domain signal, and to encode the input signal when the input signal is a audio characteristic signal; a Linear Predictive Coding (LPC) encoder to perform LPC encoding of the input signal when the input signal is a speech characteristic signal; and a bitstream generator to generate a bitstream using an output.

Apparatus and method for encoding and decoding of integrated speech and audio utilizing a band expander with a spectral band replication (SBR) to output the SBR to either time or transform domain encoding  according to the input signal

Disclosed is an LPC residual signal encoding/decoding apparatus of an MDCT based unified voice and audio encoding device. The LPC residual signal encoding apparatus analyzes a property of an input signal, selects an encoding method of an LPC filtered signal, and encode the LPC residual signal based on one of a real filterbank, a complex filterbank, and an algebraic code excited linear prediction (ACELP).

LPC residual signal encoding/decoding apparatus of modified discrete cosine transform (MDCT)-based unified voice/audio encoding device

Apparatus and method for encoding and decoding of integrated speech and audio utilizing a band expander with a spectral band replication (SBR) to output the SBR to either time or transform domain encoding according to the input signal characteristic

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

Provided are an apparatus and a method for integrally encoding and decoding a speech signal and an audio signal. The encoding apparatus may include: an input signal analyzer to analyze a characteristic of an input signal; a first conversion encoder to convert the input signal to a frequency domain signal, and to encode the input signal when the input signal is an audio characteristic signal; a Linear Predictive Coding (LPC) encoder to perform LPC encoding of the input signal when the input signal is a speech characteristic signal; a frequency band expander for expanding a frequency band of the input signal whose output is transmitted to either the time-domain encoding module or the transform encoding module based on the input characteristic; and a bitstream generator to generate a bitstream using an output signal of the first conversion encoder and an output signal of the LPC encoder.

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Seoul, South Korea

Young-cheol Park