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Registered APPARATUS AND METHOD FOR CODING SIGNAL IN A COMMUNICATION SYSTEM

MDCT 기반의 음성 및 오디오 코덱의 슈퍼와이드밴드 확장 방법 및 그 장치
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Inventors
김홍국, Lee Mi Suk, 이영한, Sung Jongmo, Hyun Woo Kim, Lee Byung Sun, Do Young Kim, Bae Hyun Joo, Yang Heesik
Application No.
13106649 (2011.05.12)
Publication No.
20110280337 (2011.11.17)
Registration No.
8751225 (2014.06.10)
Country
UNITED STATES
Project Code
10MI3100, Study on Acoustic Convergence Codec and its Control Technology for FMC, Lee Byung Sun
Abstract
Provided is an apparatus and method for encoding a voice and audio signal by expanding a modified discrete cosine transform (MDCT) based CODEC to a wideband and a super-wideband in a communication system. The apparatus for encoding a signal in a communication system, includes a converter configured to convert a time domain signal corresponding to a service to be provided to users to a frequency domain signal, a quantization and normalization unit configured to calculate and quantize gain of each subband in the converted frequency domain signal and normalize a frequency coefficient of the each subband, a search unit configured to search patch information of each subband in the converted frequency domain signal using the normalized frequency coefficient, and a packetizer configured to packetize the quantized gain and the searched patch information and encode gain information of each subband in the frequency domain signal.
KSP Keywords
Audio signal, Communication system, Discrete cosine, Discrete cosine Transform, Frequency domain(FD), Modified Discrete Cosine Transform(MDCT), Normalized frequency, cosine transform, frequency domain signal, super wideband(SWB), time-domain