BROWSE
Detail
Registered EMBEDDED CODE-EXCITED LINERAR PREDICTION SPEECH CODING AND DECODING APPARATUS AND METHOD
- Inventors
- Lee Mi Suk, Do Young Kim, Sung Jongmo, Hyun Woo Kim
- Application No.
- 11297686 (2005.12.07)
- Publication No.
- 20060122830 (2006.06.08)
- Registration No.
- 8265929 (2012.09.11)
- Country
- UNITED STATES
- Project Code
- 04MT2300, Development of Next Generation High-Quality VolP Core Technology, Do Young Kim
- Abstract
- Provides is an embedded code-excited linear prediction speech coding/decoding apparatus and method that can deal with the capacity change of speech transmission channel by modeling an error signal not coded at a core speech coder based on a transmission rate in a multiple pulse search mode or gain compensation mode and then transmitting it in an optimum mode. The apparatus includes a core speech coding unit for coding an input speech signal with spectral envelop and an excitation signal, a transmission rate determination unit for allocating the number of bits additionally allowed depending on a capacity of a transmission channel, and an embedded excitation signal coding unit for coding a residual excitation signal that is not coded in the core speech coding unit based on the number of additionally allowed bits using one of a multiple pulse excitation coding mode and a gain compensation mode.