JPS628389A - Random access device - Google Patents

Abstract

PURPOSE:To make unnecessary a program list of another control converting the program list of the program recorded at a video tape to the character and displaying to a monitoring television. CONSTITUTION:When the electric power source of a random access control circuit 3 is ON or the video tape is inserted into a VTR 1, by an index control signal 26, an index reading circuit 12 functions and reads the index data. The read index data are stored in an index signal memory 13. The index data are added to a character generating circuit 14, converted to the character signal and outputted as a program list signal 28. For a video signal change-over circuit 21, by a video change-over signal 24, the program list signal 28 is selected, outputted as a monitor signal 8 and the program list can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a random access device for freely extracting and playing back any program from among a plurality of programs recorded on one tape using a video tape recorder. It is something.

BACKGROUND OF THE INVENTION In recent years, random access devices have been in increasing demand for product information at product exhibitions.

An example of the conventional random access device mentioned above will be described below. Conventional random access devices simply record multiple programs and random access data for accessing the programs on a tape, and the program list exists separately from the tape, and programs can be accessed while referring to the program list. was selected.

Problems to be Solved by the Invention For this reason, it is necessary to manage tapes and program lists in one-to-one correspondence, and as the number of tapes increases, it becomes difficult to manage them.

In view of the above problems, the present invention records a program list as index data at the beginning of a tape, reads the index data during playback, converts it into characters by a character generation circuit, and displays it as a program list on a monitor television. The present invention provides a random access device that eliminates the need for a conventional separately managed program list.

Means for Solving the Problems In order to solve the above problems, the random access device of the present invention includes index data to be recorded at the beginning of a videotape, a circuit for recording and reproducing the index data, and a character generating circuit. It is something.

Effect of the Invention With the above-described configuration, when a plurality of programs are recorded on one tape, the present invention can record program list data as index data at the beginning of the tape in addition to data for accessing any program. During playback, this index data is added to the character generation circuit and converted into characters, and the program list can be displayed on the monitor television, eliminating the need for the conventional separately managed program list.

Embodiment Hereinafter, a random access device according to an embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a random access device according to an embodiment of the present invention. In FIG. 1, 1 is a video tape recorder (hereinafter abbreviated as VTR), 2 is a monitor television,
3 is a random access control circuit. 4 is an audio signal;
6 is a reproduced data signal, and 6 is a video signal, both of which are signals output from the VTR 1. 7 is a recording data signal, which is data for random access and index display. 8 is a monitor signal, which is added to the monitor television 2. 9 is a VTR control signal, which is a signal used to control the VTR 1 during random access. 1Q is an operation switch, and 11 is an operation signal, which is a command to the random access control circuit 3.

FIG. 2 shows a detailed diagram of the random access control circuit 3, which is the main part of the present invention, and describes the operations of the present invention, such as reading index data and random access data, random access operations, and writing index data and random access data. I will explain in this order.

First, turn on the power of the random access control circuit 3 or
When a video tape is inserted into R1, the index reading circuit 12 operates in accordance with the index control signal 26 to read the index data.

13 is an index signal memory in which read index data is stored. The index data is applied to a character generation circuit 14, converted into a single character signal, and outputted as a program list signal 28. A video signal switching circuit 21 selects a program list signal 28 according to a video switching signal 24 and outputs it as a monitor signal 8 to display a program list.

Next, reading data for random access is performed in the same manner as reading the index data. 16 is a random access data reading circuit, and reproduced data signal 5
Read data from random access data memory 1
7, and preparation for random access is completed.

The random access operation is started by an operation signal 11. When a program is selected, the time code reading circuit 19 reads the position of the tape according to instructions from the VTR control circuit 2o, compares it with the position of the program stored in the random access data memory 17, and sets the VT according to the VTR control signal 9.
Controls R1, searches for programs, and plays them.

Finally, recording of index data and random access data will be explained. 16 is an index signal writing circuit, which is a circuit that converts the index data stored in the index signal memory 13 into an audio signal. Similarly, 18 is a random access data writing circuit, which is a circuit that converts the data stored in the random access data memory 17 into an audio signal. 22 is a recording data signal switching circuit; a recording data switching signal 26;
Either index data 29 or random access data 3o is selected and output as a recording data signal 7 to be recorded on a tape.

As described above, according to this embodiment, a program list can be displayed on a television monitor by providing an index data recording/reproducing circuit and a character generation circuit and converting the read index data into characters.

Effects of the Invention As described above, according to the present invention, a program list can be displayed on a monitor television, so an excellent effect can be obtained in that a program list written on paper is not necessary.

In addition, by adding a signal from the VTR control circuit to the character generation circuit, the operation of the VTFt can be displayed, and when a program is selected, the waiting time until the desired program is displayed can be displayed. be.

Furthermore, since the program list is displayed on the monitor television, the combination with a light pen has the effect of making program selection easier.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a random access device according to an embodiment of the present invention, and FIG. 2 is a detailed block diagram of an example of a random access control circuit that can be used in the present invention. 1...Video tape recorder (VTR), 2.
...Monitor television, 3...Random access control circuit, 12... Index signal reading circuit, 13... Index signal memory, 14
... Character generation circuit, 16 ... Index signal writing circuit, 16 ... Rung 4 access data reading circuit, 17 ... Random access data memory, 18 ...Random access data writing circuit, 19...Time code reading circuit, 2
0... VTR control circuit, 21... Video signal switching circuit, 22... Recording data signal switching circuit.

Claims (1)

[Claims] Using index data and random access data recorded at the beginning of the videotape, a circuit for recording and reproducing them, and a character generation circuit, the program list of the programs recorded on the videotape is converted into characters and displayed on the monitor TV. A random access device characterized by being configured as follows.