Television – Bandwidth reduction system – Data rate reduction
Patent
1994-09-19
1996-07-02
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 750
Patent
active
055327478
ABSTRACT:
A method for decoding an encoded image signal supplied in the form of a series of encoded image frames, each of the encoded image frames being divided into a multiplicity of macroblocks of pixels, each of the macroblocks having an associated half-pixel resolution motion vector which represents a translatory motion of the macroblock between a present and its preceding frames of the encoded image signal to a half-pixel accuracy, comprises: providing differential pixels of a differential macroblock in a first predetermined scanning order by performing entropy decoding, inverse quantization and inverse transformation on the pixels in each macroblock of the present frame; scanning the differential pixels so as to provide scan converted differential pixels of a scan converted differential macroblock in a second predetermined scanning order; providing half-pixel resolution pixels of a half-pixel resolution macroblock in the second predetermined scanning order by accessing, under a control of the half-pixel resolution motion vector, the pixels in the previous frame in an order corresponding to the second predetermined scanning order and, depending on the half-pixel resolution motion vector, performing a spatial interpolation on the pixels in the previous frame; and adding, on a pixel-by-pixel basis, the scan converted differential macroblock to the half-pixel resolution macroblock, to thereby form a reconstructed macroblock of the present frame.
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Uramoto et al, "A Half-Pel Precision Motion Estimation Processor of NTSC-Resolution Video", Proceedings of the IEEE 1993 Custom Integrated Circuits Conference, May 1993.
Kwon Oh-Sang
Yoon Sang-Ho
Chin Tommy P.
Daewoo Electronics Co. Ltd.
Lee Richard
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