Abstract: A video library system in an apparatus using a video tape informs of index information about the video tape, and a method for embodying the system is provided. A library corresponding to an index code loaded in a vertical blanking period of a composite video signal is received from a memory to a microcomputer to display on a screen during playing, and the index code received from the memory to the microcomputer is increased to be combined with the composite video signal in an adder during recording, thereby capable of recording and reproducing index information in the vertical blanking period without requiring a label, VISS or VASS.

Abstract: A video library system for an apparatus using a video tape accumulates index information regarding the video tape and includes a memory storing the library data, a microcomputer, an on screen display circuit and a pair of adders. Index information is added via the first adder to the vertical blanking interval of the composite video signal under the control of the microcomputer and the library data is built and stored in the memory with library data corresponding to the index information. The microcomputer also permits the library data to be output to a monitor via on screen display circuit and the second adder.

Abstract: A video cassette recorder, in which the head-drum angle is controlled by a control voltage which varies according to the tape speed detected from the frequency or a capstan motor applied by a frequency detecting portion at a first stage. Then, based upon the Fuzzy theory, the video head of head-drum can be maintained at a constant angle with the pitch (P) of a video tape independent of the tape speed by reproducing the control voltage by means of a detected membership function detected according to the gain difference (G) coming from a gain detecting portion.