An image forming apparatus includes a main board, a power supply board, a base member, a first shielding member and a second shielding member. The main board controls an image forming operation. The power supply board is disposed adjacent to the main board to supply power to the main board. On the base member, the main board and the power supply board are supported. The first shielding member is fixed on the base member so as to cover the main board and the power supply board. The second shielding member is fixed on the base member between the main board and the power supply board.

An electronic device for encoding a picture is described. The electronic device includes a processor and instructions stored in memory that are in electronic communication with the processor. The instructions are executable to encode a step-wise temporal sub-layer access (STSA) sample grouping. The instructions are further executable to send and/or store the STSA sample grouping.

An electronic device for encoding a picture is described. The electronic device includes a processor and instructions stored in memory that are in electronic communication with the processor. The instructions are executable to encode a step-wise temporal sub-layer access (STSA) sample grouping. The instructions are further executable to send and/or store the STSA sample grouping.