초록 ▼

A method for encoding and decoding still video frames, and a sequence of frames of digitized motion picture video data, using inter-frame analysis. Sequences of frames are encoded by first subdividing each frame within a set of adjacent frames into a plurality of blocks, each corresponding to at lea

A method for encoding and decoding still video frames, and a sequence of frames of digitized motion picture video data, using inter-frame analysis. Sequences of frames are encoded by first subdividing each frame within a set of adjacent frames into a plurality of blocks, each corresponding to at least one other block within at least one adjacent frame, so as to create a group of corresponding of blocks. A luminance component of each pixel within each group of corresponding blocks is averaged to generate a mean luminance value for each group of corresponding blocks. An upper color value for each group of corresponding blocks is determined, as well as a lower color value. A one-bit value is assigned to each pixel within each block. The one-bit value is set to a first binary level when the luminance component of an associated pixel value is greater in magnitude than the corresponding mean luminance value. The one-bit value is set to a second binary level when the luminance component of an associated pixel value is not greater in magnitude than the corresponding mean luminance value. In this manner, sets of adjacent frames may be represented in encoded form by a one-bit per pixel matrix, with a single upper color value and a single lower color value for each group of blocks.

대표청구항 ▼

A method for encoding a sequence of frames of digitized motion picture video data, the sequence of frames containing a plurality of sets of proximately-positioned frames within the sequence, each frame within the sequence of frames containing a plurality of digital pixel values, the method comprisin

A method for encoding a sequence of frames of digitized motion picture video data, the sequence of frames containing a plurality of sets of proximately-positioned frames within the sequence, each frame within the sequence of frames containing a plurality of digital pixel values, the method comprising the steps of: dividing each frame within each set of proximately-positioned frames of digitized motion picture video data into a plurality of blocks of pixels, each block corresponding to at least one other block within at least one proximately-positioned frame, so as to create a plurality of groups of corresponding blocks; averaging a luminance component of each of the pixel values within each group of corresponding blocks to generate a mean luminance value for each group of corresponding blocks; determining an upper color value for each group of corresponding blocks, the upper color value being equal to a combination of averages of color components of pixels within the group of corresponding blocks having a luminance component greater in magnitude than the mean luminance component for the group of corresponding blocks; establishing a lower color value for each group of corresponding blocks, the lower color value being equal to a combination of averages of color components of pixels within the group of corresponding blocks having a luminance component which is not greater in magnitude than the mean luminance component for the group of corresponding blocks; comparing the luminance components of each pixel within each block with the mean luminance value for the corresponding group of blocks; setting a one-bit value in a one-bit per pixel matrix to a first binary level when the luminance component of an associated pixel value is greater in magnitude than the corresponding mean luminance value; and setting a one-bit value in a one-bit per pixel matrix to a second binary level when the luminance component of an associated pixel value is not greater in magnitude than the corresponding mean luminance value; whereby each set of proximately-positioned frames may be represented in encoded form by a one-bit per pixel matrix for each frame, a single upper color value for each group of blocks, and a single lower color value for each group of blocks.