Matching pursuits with differential operator dictionaries
نویسندگان
چکیده
منابع مشابه
Matching pursuits with time-frequency dictionaries
We introduce an algorithm, called matching pursuit, that decomposes any signal into a linear expansion of waveforms that are selected from a redundant dictionary of functions. These waveforms are chosen in order to best match the signal structures. Matching pursuits are general procedures to compute adaptive signal representations. With a dictionary of Gabor functions a matching pursuit defines...
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Matching pursuits is a dictionary-based coding method, which has recently been demonstrated to outperform standard techniques, such as H.263, at low bit rate video compression. Unfortunately, the method involves an extremely high computational cost, compared to the DCT-based H.263. The contribution of this paper relies on reporting three new dictionaries for matching pursuits video coding, whos...
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\Matching Pursuits" is a signal expansion technique whose e ciency for video coding has already been demonstrated in the MPEG-4 community. In this paper, we foccus our attention on some aspects of the algorithm. Firstly, the relevance of the orthogonalization of the signal expansion is investigated. Secondly, a subband dictionary is proposed as an alternative to the Gabor dictionary, used up to...
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Matching pursuits over a basis of separable Gabor functions has been demonstrated to outperform DCT methods for displaced frame difference coding for video compression. Unfortunately, apart from very low bit-rate applications, the algorithm involves an extremely high computational load. This paper contains original contribution to the issues of dictionary selection and fast implementation for m...
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|\Matching Pursuits" is a signal expansion technique whose e ciency for video coding has already been largely demonstrated in the MPEG-4 framework. In this paper, our attention focuses on complexity issues. First, the most expensive step of the signal expansion process is signi cantly speeded up by exploiting results achieved in the wavelet and multiresolution theory. A subband dictionary is pr...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1994
ISSN: 0001-4966
DOI: 10.1121/1.411142