Patent ID: 7054493
Filing Date: 2006-05-30
Classification: G06F,G06K,H03M,H04N

Abstract:
1. A context model for generating a context, the context model comprising: a first input for information indicative of a current bitplane for which contexts are to be generated; a second input of coefficients from a memory; a unit coupled to the first and second inputs to determine whether a one bit in the coefficient bits being input and identifies the location of the one bit if located, the unit having an output indicative of whether a first non-zero magnitude bit has been observed and the bit plane in which it was observed, if so; a plurality of registers coupled to the unit and to receive bits of coefficients from the memory to store data corresponding to neighboring coefficients that comprise coefficients above, below and to the left of a current coefficient for which a context is being generated, wherein outputs of the plurality of registers form the context based on the data corresponding to neighboring coefficients and based on the outputs of the unit.