Method And An Apparatus for Encoding and Decoding of Digital Image/Video Material

A method comprising:

• determining a horizontal dimension of a transform block corresponding to a horizontal direction of the transform block and a vertical dimension of the transform block corresponding to a vertical direction of the transform block;
• determining a first transform and a second transform, wherein the first transform has smaller first coefficient for its first basis function compared to a first coefficient of a first basis function of the second transform;
• selecting the first transform having smaller first coefficient for its first basis function for the direction with the smaller dimension of the transform block and selecting the second transform having larger first coefficient for its first basis function for the direction with the larger dimension of the transform block.

A non-transitory computer readable medium including instructions stored thereon for performing at least the following:

• determining a horizontal dimension of a transform block corresponding to a horizontal direction of the transform block and a vertical dimension of the transform block corresponding to a vertical direction of the transform block;
• determining a first transform and a second transform, wherein the first transform has smaller first coefficient for its first basis function compared to a first coefficient of a first basis function of the second transform;
• selecting the first transform having smaller first coefficient for its first basis function for the direction with the smaller dimension of the transform block and selecting the second transform having larger first coefficient for its first basis function for the direction with the larger dimension of the transform block.