Patent ID: 7764845
Filing Date: 2010-07-27
Classification: G06F,H04N

Abstract:
1. A signal processing method for performing inverse orthogonal transform for a combination of orthogonal transform coefficients obtained by orthogonal-transforming a signal, the method comprising the steps of: storing in advance a signal value obtained by performing inverse orthogonal transform for at least one-predetermined combination of orthogonal transform coefficients (storing step); receiving combinations of orthogonal transform coefficients sequentially and determining whether or not each of the received combinations of orthogonal transform coefficients corresponds with the predetermined combination of orthogonal transform coefficients for which the signal value is stored in advance (determining step); and performing first inverse orthogonal transform in which a restored signal is output based on the signal value stored in advance if the received combination of orthogonal transform coefficients corresponds with the predetermined combination of orthogonal transform coefficients as a result of the determination, and performing second inverse orthogonal transform in which the received combination of orthogonal transform coefficients is subjected to inverse orthogonal transform by computation if the received combination of orthogonal transform coefficients does not correspond with the predetermined combination of orthogonal transform coefficients (processing step).