Patent ID: 9118898
Filing Date: 2015-08-25
Classification: G06F,H04N

Abstract:
1. A method comprising: receiving coded media data with a coding device, wherein the coded media data comprises one or more of coded image data and coded video data; applying first and second scaled factors (μ,η) with an inverse quantization unit to one or more quantized DCT coefficients of the coded media data to determine one or more DCT coefficients; and performing a 8-point inverse discrete cosine transform (IDCT) with an 8-point IDCT hardware unit of the coding device to transform the determined one or more DCT coefficients of the coded media data from a frequency domain to a spatial domain so as to determine residual media data, wherein the 8-point IDCT hardware unit includes: an even portion comprising first and second internal factors (A, B) that are related to the first scaled factor (μ) in accordance with a first relationship, wherein the first relationship is defined such that the first scaled factor equals a square root of a sum of a square of the first internal factor plus a square of the second internal factor; and an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to the second scaled factor (η) in accordance with a second relationship, wherein the second relationship is defined such that the second scaled factor equals a square root of a sum of a square of the third internal factor plus a square of the fourth internal factor, and wherein the second relationship also is defined such that the second scaled factor equals a square root of a sum of a square of the fifth internal factor plus a square of the sixth internal factor.