Patent ID: 8866646
Filing Date: 2014-10-21
Classification: G06F,G06K,G06T,H04N

Abstract:
1. A compression unit comprising: a data buffer coupled to receive image data; a transform circuit coupled to the data buffer and configured to transform the image data in the data buffer according to one or more transformation algorithms, wherein a result of the one or more transformation algorithms is a set of coefficients; a coefficient links memory configured to store pointers to coefficients in the set of coefficients; a plurality of registers configured to store initial coefficient pointers and last coefficient pointers; and a control circuit coupled to the data buffer, the coefficient links memory, and the plurality of registers, wherein the control circuit is configured to generate a linked list of coefficients for each significance group in the set of coefficients using the coefficient links memory and the plurality of registers, wherein coefficients in a given significance group have a same combination of one or more most significant set bits dependent on a sign bit, and wherein the control circuit is configured to transmit the coefficients by traversing the linked lists for each significance group.