Patent ID: 9232225
Filing Date: 2016-01-05
CPC Classification: H04N

Claim Text:
1. A method comprising: receiving a plurality of input images; determining, by an encoder having a processor and memory, a set of subbands associated with an input image of the plurality of input images; determining a set of wavelet coefficients associated with each subband of the plurality of subbands; generating, by the processor, a wavelet tree, the wavelet tree comprising a set of nodes, wherein each node of the set of nodes of the wavelet tree is associated with a wavelet coefficient of the set of wavelet coefficients; generating, by the processor, a maximum quantization level for a set of descendants of the set of nodes of the wavelet tree; determining, by the processor, if the maximum quantization level is less than a threshold and then setting the wavelet coefficient to zero if it is not, otherwise encoding the maximum quantization level; encoding the set of wavelet coefficients; and transmitting a bit stream, wherein the bit stream comprises the encoded maximum quantization level and the encoded set of wavelet coefficients.