Patent ID: 9602826
Date: 2017-03-21
CPC Classifications: H04N

Claim:
1. A method of encoding data, the method comprising: encoding a first portion of an array of data to generate a first set of coefficients, using a first transform; decoding the first set of coefficients to generate a decoded approximation of the first portion, using the first transform; selecting a second transform from multiple candidate transforms based at least in part on a measure of encoding performance for each candidate transform used to encode the decoded approximation of the first portion; and encoding a second portion of the array of data in proximity to the first portion of the array of data to generate a second set of coefficients using the selected second transform; wherein a first candidate transform used to encode the decoded approximation of the first portion results in a particular set of coefficients, and the measure of encoding performance comprises a difference between the decoded approximation of the first portion and data decoded from the particular set of coefficients using the first candidate transform.