Patent ID: 8199818
Filing Date: 2012-06-12
Classification: H04N

Abstract:
1. An intra prediction system of a video encoder which allows intra encoding when each macro block is encoded, comprising: a frequency component extraction unit having, as inputs, a pixel value array of an encoded adjacent macro block and a prediction direction for extracting a portion or all of an alternating current frequency component of an orthogonal conversion coefficient, the orthogonal conversion coefficient is obtained by a pixel value included in the pixel value array of the encoded adjacent macro block along the prediction direction and made one-dimensional, then subjected to a one-dimensional orthogonal conversion; and a prediction value calculation unit having, as inputs, the pixel value array of the encoded adjacent macro block, the prediction direction, and the alternating frequency component outputted from the frequency component extraction unit for generating a prediction value using the orthogonal conversion coefficient which comprises a direct current frequency component equivalent to the pixel value or an average value of two or more pixel values included in the pixel value array of the encoded adjacent macro block and the alternating current frequency components outputted from the frequency component extraction unit subjected to an inverted orthogonal conversion.