Open AccessJournal Article
AC-3: Flexible Perceptual Coding for Audio Transmission and Storage
Craig C. Todd,Grant Allen Davidson,Mark Franklin Davis,Louis Dunn Fielder,Brian David Link,Steve Vernon +5 more
TLDR
Dolby AC-3 is a flexible audio data compression technology capable of encoding a range of audio channel formats into a low rate bit stream, based on a transform filter bank and psychoacoustics.Abstract:
Dolby AC-3 is a flexible audio data compression technology capable of encoding a range of audio channel formats into a low rate bit stream. Channel formats range from monophonic to 5.1 channels, and may include a number of associated audio services. Based on a transform filter bank and psychoacoustics, AC-3 includes the novel features of transmission of a variable frequency resolution spectral envelope and hybrid backward/forward adaptive bit allocation.read more
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Wavelets and Subband Coding
Martin Vetterli,Jelena Kovacevic +1 more
TL;DR: Wavelets and Subband Coding offered a unified view of the exciting field of wavelets and their discrete-time cousins, filter banks, or subband coding and developed the theory in both continuous and discrete time.
Journal ArticleDOI
Perceptual coding of digital audio
T. Painter,Andreas Spanias +1 more
TL;DR: This paper reviews methodologies that achieve perceptually transparent coding of FM- and CD-quality audio signals, including algorithms that manipulate transform components, subband signal decompositions, sinusoidal signal components, and linear prediction parameters, as well as hybrid algorithms that make use of more than one signal model.
Patent
Multi-channel predictive subband audio coder using psychoacoustic adaptive bit allocation in frequency, time and over the multiple channels
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Advances in speech and audio compression
TL;DR: Current activity in speech compression is dominated by research and development of a family of techniques commonly described as code-excited linear prediction (CELP) coding, which offer a quality versus bit rate tradeoff that significantly exceeds most prior compression techniques.
Patent
Multichannel audio coding
TL;DR: In this article, the authors proposed an improved decorrelation of multiple audio channels derived from a monophonic audio channel or from multiple channels of audio along with related auxiliary information from which multiple channels can be reconstructed.