after a specified time further the timing when biphase demodulator 106 reads out the data from memory 107 may be determined by a video signal processing unit hereinafter another preferred embodiment where an audio signal is delayed when a resolution conversion is performed will be described with reference to fig6 in fig6 those having same reference numerals as those shown in fig1 have same functions so descriptions thereof will be omitted the audio signal delay apparatus in fig6 further includes video input terminal 600 image processor 601 for performing such processes as a resolution conversion on a video signal microcomputer 602 for controlling a resolution of the video signal and an amount of an audio signal delay time and video output terminal 603 when a video signal corresponding to the audio signal is inputted from video input terminal 600 microcomputer 602 sends an image resolution control signal to image processor 601 to convert a resolution of the inputted video signal into an optimal resolution for a tv set to be connected and an audio delay control signal to biphase modulator 106 so that an audio signal delay time can be determined based on a video signal delay time image processor 601 performs operations such as the resolution conversion or a scanning mode conversion more specifically the video signal delay time by the resolution conversion in image processor 601 is given in advance and microcomputer.