Patent ID: 8223844

Claim:
A method of generating an estimation of high-frequency information lost from an encoded block of an original image block, the method comprising: obtaining, via an acquisition processor, the encoded block of the original image block; initially decoding, via an enhancement processor, the encoded block into an initially-decoded block of the video frame, said initially-decoded block comprising a first plurality of transform coefficients including a set of zero-valued high-frequency transform coefficients that lost a set of non-zero values due to quantization of the original image block; predicting, via said enhancement processor, a high-frequency basis function according to at least some of said first plurality of transform coefficients, said high-frequency basis function including a plurality of predicted high-frequency non-zero coefficients that are not present in either of the encoded block or said initially-decoded block, wherein said predicted high-frequency non-zero coefficients are statistically similar to said set of non-zero values; and inserting, via said enhancement processor, said high-frequency basis function into said initially-decoded block to form a finally-decoded high-frequency-enhanced output block including said plurality of predicted high-frequency non-zero coefficients.