In this paper we present an efficient coding method for the upper band(4-7kHz) of wideband(0.5-7kHz) speech coding based on a band-split approach. Due to the impulselike characteristics in upper band signal, it is very difficult to efficiently quantize the signal at low bit-rate when we use transform coding techniques. We propose two temporal normalization techniques, direct temporal energy normalization and frequency domain linear prediction, to reduce the extremely noticeable artifacts. Simulation results show that the proposed algorithm successfully encodes the upper band signal, and the new split-band type wideband coder adopting the proposed technology provides better quality than 56 kbit/s ITU-T G. 722 at the bitrate of 20 kbit/s.
|Number of pages||4|
|Publication status||Published - 2004|
|Event||8th International Conference on Spoken Language Processing, ICSLP 2004 - Jeju, Jeju Island, Korea, Republic of|
Duration: 2004 Oct 4 → 2004 Oct 8
|Other||8th International Conference on Spoken Language Processing, ICSLP 2004|
|Country/Territory||Korea, Republic of|
|City||Jeju, Jeju Island|
|Period||04/10/4 → 04/10/8|
Bibliographical noteFunding Information:
This work was supported by the Electronics and Telecommunications Research Institute (ETRI).
All Science Journal Classification (ASJC) codes
- Language and Linguistics
- Linguistics and Language