MDCT 기반의 음성 및 오디오 코덱의 슈퍼와이드밴드 확장 방법 및 그 장치
김홍국, 이미숙, 이영한, 성종모, 김현우, 양희식, 김도영, 이병선, 배현주
- 8751225 (2014.06.10)
- 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 제안 키워드
- Audio signal, Communication system, Discrete cosine, Discrete cosine Transform, Modified Discrete Cosine Transform(MDCT), Normalized frequency, cosine transform, frequency domain(FD), frequency domain signal, super wideband(SWB), time-domain