Search-free codebook mapping for artificial bandwidth extension

Heewan Park, Byungsik Yoon, Sangwon Kang, Andreas Spanias

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1479-1482
Number of pages4
JournalIEICE Transactions on Communications
Issue number4
StatePublished - Apr 2012


  • AMR
  • Artificial bandwidth extension
  • Codebook mapping
  • Speech enhancement

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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