| 摘要 |
PURPOSE:To improve the reproducing function by putting sound recording information on a synchronizing signal in a composite signal. CONSTITUTION:A 4-bit data synchronizing signal DS, 128-bit PCM audio data signal D, and 4-bit white level reference signal WR are constituted in the period of a video signal. A 5-bit pedestal level P is provided before a horizontal synchronizing signal H and a 13-bit pedestal level P is provided after it, and program data PD of the total number of musics, the playing time, music numbers, etc. is superposed onto the signal H, and the amplitude of data PD is made narrower than that of the signal H for the purpose of distinguishing them from each other. An intermediate voltage between the level P and the high level of data PD is set as a separation level VL1 of the signal, and an intermediate voltage of data PD is set as a read reference voltage VL2 of data PD, thereby separating and taking out the signal H and data PD. |
