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Inter-block interpolation prediction coder, decoder, coding method and decoding method

A coding device and inter-prediction technology, applied in digital video signal modification, image coding, television, etc.

Inactive Publication Date: 2004-06-02
VICTOR CO OF JAPAN LTD
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This sequence of operations is repeated until the entire image is encoded

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  • Inter-block interpolation prediction coder, decoder, coding method and decoding method
  • Inter-block interpolation prediction coder, decoder, coding method and decoding method
  • Inter-block interpolation prediction coder, decoder, coding method and decoding method

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[0080] A first embodiment of the interblock interpolation predictive encoding apparatus according to the present invention will be described below with reference to the overall system block diagram of FIG. In FIG. 1, a raster-scanned digital video signal of the usual type is supplied to an input 1 and the resulting code is supplied to an output 7. In FIG. Subtractor 4 and predictive adder 17 basically perform the same functions as the correspondingly specified components in the prior art example of FIG. 16 described above. In addition, this embodiment includes a block conversion section 2, switches 3, 5, 10, and 16, and an encoding section 6, block memories 9, 11, and block line memory 15, multipliers 12 and 14, and adder 13, and predictive signal generation part 20, and prediction control part 8 and decoding part 18. The operations of the block conversion section 2, the encoding section 6, the prediction control section 8, and the decoding section 18 are substantially differ...

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Abstract

An image encoding apparatus for application to images expressed as respective frames of a digital video signal, whereby an image is converted into an array of blocks with specific blocks predetermined as being independent internally encoded blocks (D) and the remainder as predictively encoded blocks (A, B, C), with predicted pixel signal values for a predictively encoded block being derived by interpolation from pixel signal values of at least one pair of blocks which have been already encoded and enclose that predictively encoded block along the row or column direction or both the row and column directions. Encoding efficiency is enhanced by applying Discrete Sine Transform processing along the interpolation direction, when encoding an array of prediction error signal values derived for a block, and by executing adaptive prediction by determining an optimum interpolation direction, when there are two possible directions for deriving predicted pixel signal values for a block.

Description

technical field [0001] The present invention relates to image encoding devices and methods and corresponding decoding devices and methods, based on the operation of dividing an image into a plurality of pixel blocks and decoding and encoding these blocks, these devices and methods are for an image represented as a plurality of pixels Encoding and subsequent decoding are performed. Background technique [0002] In particular, the present invention relates to inter-block interpolation predictive coding apparatus and methods whereby coding efficiency is improved by applying inter-block interpolation to predict pixel values ​​of certain image blocks for which only the resulting set of prediction error values to encode. [0003] One of the basic methods of data compression commonly applied to images transmitted as individual digital video signal frames is to treat each image as a plurality of pixel blocks and to use the correlation that usually occurs within each block to reduce...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00H04N19/593
CPCH04N19/00763H04N7/345H04N19/593
Inventor 高冈胜美杉山贤二
Owner VICTOR CO OF JAPAN LTD
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