A television apparatus comprising: a first image processor which is configured to perform first image processing operations on an image signal; a display which is configured to display the processed image signal; and a controller; a connector configured to connect to an upgrading apparatus, the upgrading apparatus comprising a second image processor to perform a plurality of second image processing operations, the second image processor being upgraded compared to the first image processor; and the controller being configured, in response to the upgrading apparatus being connected to the connector: to communicate with the upgrading apparatus, to receive a first user interface screen generated by the upgrading apparatus, the first user interface screen comprising a first list of a plurality of second image processing operations available at the upgrading apparatus, to control the display to display the first received user interface screen, and in response to a user input selection of at least one of the plurality of second processing operations in the first list, to control the second image processor in the upgrading apparatus to perform the selected at least one of the plurality of second processing operations on the image signal on behalf or in replacement of the first image processor. a first image processor which is configured to perform first image processing operations on an image signal; a display which is configured to display the processed image signal; and a controller; a connector configured to connect to an upgrading apparatus, the upgrading apparatus comprising a second image processor to perform a plurality of second image processing operations, the second image processor being upgraded compared to the first image processor; and the controller being configured, in response to the upgrading apparatus being connected to the connector: to communicate with the upgrading apparatus, to receive a first user interface screen generated by the upgrading apparatus, the first user interface screen comprising a first list of a plurality of second image processing operations available at the upgrading apparatus, to control the display to display the first received user interface screen, and in response to a user input selection of at least one of the plurality of second processing operations in the first list, to control the second image processor in the upgrading apparatus to perform the selected at least one of the plurality of second processing operations on the image signal on behalf or in replacement of the first image processor. to communicate with the upgrading apparatus, to receive a first user interface screen generated by the upgrading apparatus, the first user interface screen comprising a first list of a plurality of second image processing operations available at the upgrading apparatus, to control the display to display the first received user interface screen, and in response to a user input selection of at least one of the plurality of second processing operations in the first list, to control the second image processor in the upgrading apparatus to perform the selected at least one of the plurality of second processing operations on the image signal on behalf or in replacement of the first image processor.