Efficient bit assignmet strategy for perceptual audio coding

Cheng Han Yang*, Hsueh-Ming Hang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

For the purpose of efficient audio coding at low rates, a new bit allocation strategy is proposed in this paper. The basic idea behind this approach is "Give bits to the band with the maximum NMR-Gain/bit" or "Retrieve bits from the band with the maximum bits/NMR-Loss". The notion of "bit-use efficiency" is suggested and it can be employed to construct a bit assignment algorithm operated at band-level as compared to the traditional frame-level bit assignment methods. Based on this strategy a new bit assignment scheme, called Max-BNLR, is designed for the MPEG-4 AAC. Simulation results show that the performance of the Max-BNLR scheme is significantly better than that of the MPEG-4 AAC Verification Model (VM) and is close to that of TB-ANMR [3], which is the (nearly) optimal solution. Moreover, the Max-BNLR scheme has the advantages of low computational complexity comparing to TB-ANMR.

Original languageEnglish
Article number1199992
Pages (from-to)405-408
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume5
DOIs
StatePublished - 6 Apr 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: 6 Apr 200310 Apr 2003

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