Abstract: A system and method of a forward and/or inverse discrete cosine transform in a video system. In one embodiment, an array of DCT transform coefficients are converted to a two dimensional array of spatial data. The array of DCT transform coefficients are first operated upon by a pre-scale computation unit (implemented in either hardware or software) which multiplies a set of predetermined pre-scale constants with the input coefficients. The pre-scale constants multiplied by the input DCT coefficient matrix form a symmetric pre-scale array. Upon pre-scaling using the symmetric pre-scale factor array, an intermediary array is composed by performing intermediary calculations upon each column vector of the pre-scaled array. The output of this intermediary calculation is composed to form an intermediary array. Subsequently, a set of calculations are performed row-wise upon each row vector of the intermediary array to thereby form the output array of spatial data.

Abstract: A system and method of a forward and/or inverse discrete cosine transform in a video system. In one embodiment, an array of DCT transform coefficients are converted to a two dimensional array of spatial data. The array of DCT transform coefficients are first operated upon by a pre-scale computation unit (implemented in either hardware or software) which multiplies a set of predetermined pre-scale constants with the input coefficients. The pre-scale constants multiplied by the input DCT coefficient matrix form a symmetric pre-scale array. Upon pre-scaling using the symmetric pre-scale factor array, an intermediary array is composed by performing intermediary calculations upon each column vector of the pre-scaled array. The output of this intermediary calculation is composed to form an intermediary array. Subsequently, a set of calculations are performed row-wise upon each row vector of the intermediary array to thereby form the output array of spatial data.