منابع مشابه
Motion Compensation on DCT Domain
Alternative fully DCT-based video codec architectures have been proposed in the past to address the shortcomings of the conventional hybrid motion compensated DCT video codec structures traditionally chosen as the basis of implementation of standardcompliant codecs. However, no prior effort has been made to ensure interoperability of these two drastically different architectures so that fully D...
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The ability to construct intracoded frame from motion-compensated intercoded frames directly in the compressed domain is important for efficient video manipulation and composition. In the context of motion-compensated discrete cosine transform (DCT)-based coding of video as in MPEG video, this problem of DCT-domain inverse motion compensation has been studied and, subsequently, improved faster ...
متن کاملLook-up-table based DCT domain inverse motion compensation
DCT-based digital video coding standards such as MPEG and H.26x have been widely adopted for multimedia applications. Thus video processing in the DCT domain usually proves to be more ef£cient than in the spatial domain. To directly convert an inter-coded frame into an intra-coded frame in the DCT domain, the problem of DCT domain inverse motion compensation was studied in [1]. Since the data i...
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The feedback loop for temporal prediction of traditional implementations of an MPEG-compliant video coder requires conversion of images from the spatial domain to the transform domain and then back to the spatial domain due to the restriction of motion estimation schemes performed only in the spatial domain, severely limiting the throughput of the coder. However, it was shown that the low-compl...
متن کاملLocal bandwidth constrained fast inverse motion compensation for DCT-domain video transcoding
DCT-based digital video coding standards such as MPEG and H.26x are becoming more widely adopted for multimedia applications. Since the standards differ in their format and syntax, video transcoding, where a pre-coded video bit-stream is converted from one format to another format, is of interest for purposes such as channel bandwidth adaptation and video composition. DCT-domain video transcodi...
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ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2001
ISSN: 1687-6172,1687-6180
DOI: 10.1155/s1110865701000245