Samsung Electronics Co., Ltd.

Xvd Corporation

Sergey Petrov

Boris D Kudryashov

Eun-mi Oh

Ki-hyun Choo

Jung-hoe Kim

Victor D Kolesnik

Boris Trojanovsky

Andrey Trofimov

Evgeny Ovsyannikov

Konstantin Sergeevich Osipov

Eugeny Ovsjannikov

Provided are a method and apparatus for encoding and decoding a stereo signal or a multi-channel signal. According to the method and apparatus, a stereo signal or a multi-channel signal can be encoded and/or decoded by generating parameters based on a mono signal.

Method and apparatus for generating a stereo signal from a down-mixed mono signal

Method and apparatus for encoding and decoding stereo signal and multi-channel signal

Provided is an audio signal encoding method including transforming an input signal from a time domain to a time/frequency domain using a first transformation method, extracting a stereo parameter from a signal of the time/frequency domain, encoding the stereo parameter, and down-mixing the signal of the time/frequency domain, transforming each of sub-bands of the down-mixed signal to a frequency domain by using a second transformation method, and encoding the signal of the frequency domain in the frequency domain.

Audio signal encoding/decoding method and apparatus

A method and apparatus for audio compression receives an audio signal. Transform coding is applied to the audio signal to generate a sequence of transform frequency coefficients. The sequence of transform frequency coefficients is partitioned into a plurality of non-uniform width frequency ranges and then zero value frequency coefficients are inserted at the boundaries of the non-uniform width frequency ranges. As a result, certain of the transform frequency coefficients that represent high frequencies are dropped.

Method and apparatus for audio compression

According to one embodiment of the invention, a multistage vector list quantizer comprises a first stage quantizer to select candidate first stage codewords from a plurality of first stage codewords, a reference table memory storing a set of second stage codewords for each first stage codeword, and a second stage codebook constructor to generate a reduced complexity second stage codebook that is the union of sets corresponding to the candidate first stage codewords selected by the first stage quantizer.

Vector quantization with a non-structured codebook for audio compression

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Vladivostok, Russia

Sergey Petrov