Interspeech'2005 - Eurospeech

Lisbon, Portugal
September 4-8, 2005

A New Structural Preprocessor for Low-Bit Rate Speech Coding

Joon-Hyuk Chang (1), Jong-Won Shin (2), Seung Yeol Lee (2), Nam Soo Kim (2)

(1) University of California at Santa Barbara, USA; (2) Seoul National University, Korea

In this paper, we apply a new structural approach to generalized analysis-by-synthesis (GAbS) for system identification as a preprocessor of a low-bit-rate speech coder. In our approach, the coder-decoder (CODEC) system is separately estimated and then applied to modify the current input signal. This is different from that originally proposed where the CODEC system is sequentially estimated and then applied to the next input signal. The proposed estimation scheme is compared to the conventional method in terms of the signal modification approach under the various noise data and in several SNR conditions, and shows better performance.

Full Paper

Bibliographic reference.  Chang, Joon-Hyuk / Shin, Jong-Won / Lee, Seung Yeol / Kim, Nam Soo (2005): "A new structural preprocessor for low-bit rate speech coding", In INTERSPEECH-2005, 2729-2732.