광대역 코덱 음성부호화기의 품질향상 방법 및 장치
이미숙, 김도영, 이병선
- 9704501 (2017.07.11)
- The present invention relates to a codec device and method for encoding/decoding voice and audio signals in a communication system, wherein: a fixed codebook excited signal is generated by using a pulse index for a voice signal; a first adaptive codebook excited signal is generated by using a pitch index for the voice signal; a fixed codebook signal is generated by multiplying the fixed codebook excited signal by a fixed codebook gain; a first adaptive codebook signal is generated by multiplying the first adaptive codebook excited signal by a first adaptive codebook gain; and a synthesized filter excited signal is generated by adding the fixed codebook signal and the first adaptive codebook signal.
- KSP 제안 키워드
- Audio signal, Communication system, Fixed codebook, Voice signal