상세정보
등록 MDCT 기반의 음성 및 오디오 코덱의 슈퍼와이드밴드 확장 방법 및 그 장치
- 출원번호
- 13106649 (2011.05.12)
- 공개번호
- 20110280337 (2011.11.17)
- 등록번호
- 8751225 (2014.06.10)
- 출원국
- 미국
- 협약과제
- 10MI3100, FMC 어커스틱 융합코덱 및 제어기술 연구 (표준화연계), 이병선
- 초록
- 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