An Investigation and Software Implementation of Parametric Spatial Audio Codecs
Date Issued
2006
Date
2006
Author(s)
Chang, Chia-Hao
DOI
en-US
Abstract
The trend of information technology (IT) converges toward the digital home,
driven by the DVD movie multi-channel audio sound, next generation digital
multimedia content with high quality but low bit-rate multi-channel audio is surely to
be the main stream in the near future. Furthermore, lots of the new multi-channel
audio applications emerged in these years. For example, mobile applications, portable
devices, automotive applications, such as car audio playback setups even digital audio
broadcasting services, drive the demand of multichannel audio playback. A carefully
designed audio coding mechanism which minimizes transmission costs or provides
cost-efficient storage and gains best surround performance is therefore, of interest.
In fact, the complexity of the traditional audio coding schemes scale with the
number of audio channels, and the bitrate of legacy multi-channel coding techniques
are still considerable higher than mono signal. Under this circumstance, a new
imperative evolution of the digital audio coding scheme, the Parametric Spatial Audio
Coding, is proposed. The Parametric Spatial Audio Coding is a promising approach
which enables the transmission of multi-channel audio signals at data rates close to
the rates used for the representation of mono or stereo (or more) audio signals.
A thorough investigation of Parametric Spatial Audio Coding including spatial
hearing backgrounds, differences between Parametric Spatial Audio Coding
algorithms will be illustrated in the former part of this thesis. In the later part, it will
present a detail discussion on low complexity with satisfactory listening quality
implementation of a Parametric Spatial Audio Coding scheme.
Subjects
空間音訊
資料壓縮
多聲道
spatial audio
data compression
multi-channel
Type
thesis
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