Method of controlling encoding of display data

An apparatus for encoding display data, the apparatus configured to:

• perform at least a part of a first predetermined transform algorithm of a plurality of different transform algorithms on at least a first part of a first frame of display data to generate a first set of transform coefficients;
• analyse information relating to at least the first set of transform coefficients to determine whether a different transform algorithm of the plurality of different transform algorithms would be more suitable for encoding a second part of the first frame and/or a subsequent frame of the display data;
• if it is determined that a different transform algorithm of the plurality of different transform algorithms would be more suitable for encoding, encode the second part of the first frame and/or a subsequent frame of the display data using the different transform algorithm to generate an encoded first frame and/or subsequent frame;
• and
• if it is determined that a different transform algorithm of the plurality of different transform algorithms would not be more suitable for encoding, encode the second part of the first frame and/or a subsequent frame of the display data using the first predetermined transform algorithm to generate an encoded first frame and/or subsequent frame.

A system comprising:

• a non-transitory memory storing instructions;
• and
• one or more hardware processors coupled to the non-transitory memory and configured to execute the instructions from the non-transitory memory to cause the system to perform operations comprising:
• performing at least a part of a first predetermined transform algorithm of a plurality of different transform algorithms on at least a first part of a first frame of display data to generate a first set of transform coefficients;
• analysing information relating to at least the first set of transform coefficients to determine whether a different transform algorithm of the plurality of different transform algorithms would be more suitable for encoding a second part of the first frame and/or a subsequent frame of the display data;
• if it is determined that a different transform algorithm of the plurality of different transform algorithms would be more suitable for encoding, encoding the second part of the first frame and/or a subsequent frame of the display data using the different transform algorithm to generate an encoded first frame and/or subsequent frame;
• and
• if it is determined that a different transform algorithm of the plurality of different transform algorithms would not be more suitable for encoding, encoding the second part of the first frame and/or a subsequent frame of the display data using the first predetermined transform algorithm to generate an encoded first frame and/or subsequent frame.