A vector quantizing speech coder includes a Short-Term-Predictive filter which receives originally sampled speech signal s(n) and decorrelates it into a residual signal r(n). A device is provided to quantize the residual signal r(n) at a low bit rate. The device also generates a reconstructed signal...http://www.google.de/patents/US5142583?utm_source=gb-gplus-sharePatent US5142583 - Low-delay low-bit-rate speech coder
