Lossless scalable audio coding and quality enhancement

Takehiro Moriya*, Akio Jin, Takeshi Mori, Kazunaga Ikeda, Takao Kaneko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This paper proposes a lossless scalable audio coding scheme and quality enhancement processing at the decoder to compensate for some missing scalable units of information. The bit rate scalability is achieved by combining high-compression coding, such as MPEG-4, and horizontal bit slicing of the PCM-coded error signal between the original waveform and the locally reconstructed MPEG-4 signal. The horizontally sliced stream may be transported through an IP network with priority. Even if some units are missing at the decoder, reasonable quality waveform can be reconstructed by means of preserving the important packets. In addition, quality enhancement procedures including scale adjustment and post-processing have been proposed. The scale adjustment eliminates unnecessary zero's, and the post-processing recovers the spectral envelope characteristics of the original input signal. As a result of objective quality evaluation, the two techniques are confirmed to be useful for quality enhancement when lower priority packets are lost. This scheme enables graceful degradation by supporting lossless, near lossless, and high-compression coding within a single scalable framework, and is useful for narrowband to broadband audio streaming.

Original languageEnglish
Pages (from-to)425-429
Number of pages5
JournalIEICE Transactions on Information and Systems
Issue number3
Publication statusPublished - 2003 Mar
Externally publishedYes


  • Audio coding
  • Lossless
  • MPEG-4
  • Scalable

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence


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