Search-Free Codebook Mapping for Artificial Bandwidth Extension

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概要

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• A new codebook mapping algorithm for artificial bandwidth extension (ABE) is introduced in this paper. We design a wideband line spectrum pair (LSP) codebook which is coupled with the same index as the LSP codebook of a narrowband speech codec. The received narrowband LSP codebook indices are used to directly induce wideband LSP codewords. Thus, the proposed scheme eliminates codebook search processing to estimate the wideband spectrum envelope. We apply the proposed scheme to bandwidth extension in adaptive multi-rate (AMR) compressed domain. Its performance is assessed via the perceptual evaluation of speech quality (PESQ), informal listening tests, and weighted million operations per second (WMOPS) calculations.

著者

• SPANIAS Andreas

  School of Electrical, Computer and Energy Eng., Arizona State Univ.

• PARK Heewan

  Department of Electronics and Communication Engineering, Hanyang Univ.

• KANG Sangwon

  Department of Electronics and Communication Engineering, Hanyang Univ.

• YOON Byungsik

  Department of Electronics and Communication Engineering, Hanyang Univ.

関連論文

• Search-Free Codebook Mapping for Artificial Bandwidth Extension
• Search-Free Codebook Mapping for Artificial Bandwidth Extension

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