The invention is directed to methods of promoting neurogenesis by contacting neuronal tissue with neurogenesis modulating agents. The hearing aid module contains a speaker or auditory transducer, a battery or other power source powering the module, signal processing circuitry, and a microphone. A coding distortion in a block which is included in a macroblock of the field structure, and which is not adjacent to a boundary of a macroblock of the frame structure is then removed, and a coding distortion in a block which is adjacent to both a macroblock of the frame structure and a macroblock of the field structure is removed.