양자화 잡음 억제로 인한 음성 코덱의 품질 향상
이미숙, 김도영, 이병선
- 9135926 (2015.09.15)
- An apparatus and method of improving the quality of a speech codec are provided. In the method, a first energy of a signal decoded by a low-band codec is calculated, and a second energy of a signal decoded by a low-band enhancement mode is calculated. Then, when the first energy is less than a first threshold value or less than a product of the second energy and a second threshold value, a size of the decoded signal is scaled. Accordingly, generation of a quantization error with respect to a silence segment is reduced.
- KSP 제안 키워드
- Quantization error, Threshold Value, enhancement-mode, low-band, speech codec