An embedded ACELP speech coding based on the AMR-WB codec

Kj Byun, Ik Soo Eo, Hee Bum Jeong, Minsoo Hahn

Research output: Contribution to journalLetterpeer-review

6 Citations (Scopus)


This letter proposes a new embedded speech coding structure based on the Adaptive Multi-Rate Wideband (AMR-WB) standard codec. The proposed coding scheme consists of three different bitrates where the two lower bitrates are embedded into the highest one. The embedded bitstream was achieved by modifying the algebraic codebook search procedure adopted for the AMR-WB codec. The proposed method provides the advantage of scalability due to the embedded bitstream, while it inevitably requires some additional computational complexity for obtaining two different code vectors of the higher bitrate modes. Compared to the AMR-WB codec, the embedded coder shows improved speech qualifies for two higher bitrate modes with a slightly increased bitrate caused by the decreased coding efficiency of the algebraic codebook

Original languageEnglish
Pages (from-to)231-234
Number of pages4
JournalETRI Journal
Issue number2
Publication statusPublished - Apr 2005
Externally publishedYes


  • speech coding
  • embedded speech coder
  • wideband speech
  • algebraic codebook AMR-WB

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