Patent
Multiple block-size transform video coding using an asymmetric sub-band structure
TLDR
In this paper, a sub-band coder for video signals is disclosed, which uses sets of two-tap finite impulse response (FIR) filters having equal-magnitude coefficients to decompose the video signal at multiple stages.Abstract:
A sub-band coder for video signals is disclosed, which is easily realizable in VLSI due to its simple structure. The coder uses sets of two-tap finite impulse response (FIR) filters having equal-magnitude coefficients to decompose the video signal at multiple stages. In the preferred embodiment the sub-band coder has an asymmetrical structure. With the arrangement, the sub-band decomposition effects what is equivalent to a multiple block-size Hadamard transform of the video signal in which coefficients are transmitted from various block-sized transforms of larger blocks of pixel data.read more
Citations
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Patent
Audio and video transmission and receiving system
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Patent
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
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Patent
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TL;DR: In this article, a reversible wavelet filter is used to generate coefficients from input data, such as image data, and an entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
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Apparatus for compression using reversible embedded wavelets
TL;DR: A method and apparatus for encoding and decoding data is described in this paper, where the transformed signals are generated using a reversible wavelet transform and the decomposition may be performed using multiple one-dimension filters.
References
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Journal ArticleDOI
Discrete Cosine Transform
TL;DR: In this article, a discrete cosine transform (DCT) is defined and an algorithm to compute it using the fast Fourier transform is developed, which can be used in the area of digital processing for the purposes of pattern recognition and Wiener filtering.
Journal ArticleDOI
A Fast Computational Algorithm for the Discrete Cosine Transform
TL;DR: A Fast Discrete Cosine Transform algorithm has been developed which provides a factor of six improvement in computational complexity when compared to conventional DiscreteCosine Transform algorithms using the Fast Fourier Transform.
Patent
Sub-band coding of images with low computational complexity
TL;DR: In this paper, a class of filters for use in connection with the sub-band coding of a video signal is disclosed, which are of short length, symmetric and have coefficients in the form of an integer divided by a power of two.
Patent
HDTV Sub-band coding using IIR filter bank
Rashid Ansari,Antonio Fernandez +1 more
TL;DR: In this paper, a technique for the sub-band decomposition and reconstruction of video signals is described, where each field of a video signal is decomposed into sub-bands utilizing a polyphase filter bank unit including an infinite impulse response all-pass filter with coefficients that are powers of two.
Patent
Quadrature mirror filters with staggered-phase subsampling
TL;DR: By staggering the phases of the decimations of the subbands in a quadrature mirror filter bank odd-tap kernels may be usefully employed as mentioned in this paper, which is a technique used in many applications.