Patent ID: 8902974
Filing Date: 2014-12-02
Classification: H04N

Abstract:
1. A method of generating an estimation of high-frequency information lost from an encoded block of an original image in a computer comprising a memory, the method comprising: obtaining the encoded block of the original image; initially decoding the encoded block into an initially-decoded block of the image, said initially-decoded block comprising a first plurality of transform coefficients including a set of zero-valued high-frequency transform coefficients; predicting a plurality of high-frequency non-zero coefficients according to at least some of said first plurality of transform coefficients, said predicted high-frequency non-zero coefficients not having been present in either of the encoded block or said initially-decoded block; and inserting said plurality of predicted high-frequency non-zero coefficients into said initially-decoded block to form a finally-decoded high-frequency-enhanced output block.