JPH01213853A - Video tape recorder - Google Patents

Abstract

PURPOSE:To clarify the background of a recorded program by detecting the program information to be broadcast by superimposing over a particular period of a video signal and recording it in the beginning part of a picture recording or the beginning of winding a magnetic tape. CONSTITUTION:A base band video signal from a receiving circuit 2 is supplied to a program discriminating information detecting means 4 and detecting circuits 5 and 8 of a program list information detecting means 7 as well as a recording device 15, whereas a particular horizontal line signal of a vertical interval is extracted and then data-converted by decoders 6 and 9, so that bits of program discriminating information and program list information are supplied to a storage circuit 11 and a comparator circuit 13. A comparison is made between the program list information and the program discriminating information by the comparator circuit 13, which subsequently outputs a recording requesting signal. And, the program list information stored in a storage circuit 10 is restored to the video signal by an encoder 14, whereas the recording device 15 is put under operation by a recording control circuit 16, and the video signal from the receiving circuit 2 is superimposed with the video signal of the encoder 14 by a counting number of a signal of a timer device 12, so as to record a reservation program and its program list information onto the magnetic tape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention 1 (Field of Industrial Application) The present invention relates to a program reservation system for a home video recorder.

(Prior Art) West Germany employs a television signal system that transmits program identification information assigned to a program before the program is broadcast. Furthermore, a method is being planned in which program guide information is superimposed on the information and broadcast using teletext. Each piece of information is superimposed as digital data on a specific line in the vertical blanking period of the video signal. Therefore, it is possible to identify a program and obtain a program guide by detecting the information on the above-mentioned specific line.

Therefore, when recording a reserved program with a video tape recorder, the program identification information of the program to be recorded is stored in the video tape recorder itself in advance, and recording starts when a broadcast containing that program identification information starts. , it is possible to perform control so that the recording operation is performed as long as the identification information exists. This allows accurate scheduled recording even if the broadcast time of the program is shifted.

On the other hand, program guide information is information displayed on a television receiver as a program guide including program identification information, and by selecting a program with a desired program identification information from the displayed program guide with a cursor etc. The program identification information is recorded on the video tape recorder body. In other words, this makes it easy to reserve programs.

The above-mentioned apparatus has been proposed in the past, but this apparatus has a problem in that it records only the contents of the received broadcasts, and the history of when and what programs were recorded is unknown.

(Problems to be Solved by the Invention) As mentioned above, the above-mentioned VTR has a problem in that there is no history of recorded programs, when and what their contents were. The present invention aims to solve this problem and provide a VTR that can record history.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides that program information corresponding to a broadcast program is broadcast superimposed on a specific period of the video signal of the program, and that program guide information is superimposed on a specific period of the video signal of the program. a receiving circuit that extracts the video signal from a television signal that is broadcast in a superimposed manner during a period; a storage means that detects the program guide information from the video signal and selects and stores program information of a desired program from the information; a detection means for detecting program information from the video signal; a comparison circuit for detecting coincidence of each program information of the storage means and the detection means; an encoder for restoring the program information of the program detection means into a video signal; a recording device that inputs a video signal from a receiving circuit and the encoder; a recording control means that controls the start and stop of a recording state of the recording device based on the matching output of the comparison circuit; Achieve the purpose by equipping yourself with recording means.

(Function) In the present invention, program information including the time, title, etc. of the program preceding the program is detected, and if it matches the program information stored in advance, recording is started, and the received program information is recorded. This allows you to keep a record of your recordings.

(Example) Next, an example of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram showing one embodiment of the present invention. 2 is a receiving circuit that receives a television signal in which program information is broadcast with superimposition on a specific horizontal line of the vertical retrace period of the video signal prior to the program broadcast from antenna 1, and receives baseband video. Output a signal. 3 is a program information detection means, which is composed of a program identification information detection means 4 and a program guide information detection means 7. The program identification information detection means 4 includes a detection circuit 5 which inputs the video signal from the receiving circuit 2 and extracts a specific horizontal line, and a decoder 6 which inputs the output of the detection circuit 5 and extracts the program identification information. The program guide information detection means 7 includes a detection circuit 8 having the same function as the detection circuit 5, a decoder 9 that inputs the output of the detection circuit 8 and extracts program guide information, and a storage circuit 10 that holds this program guide information.
It becomes more. A storage circuit 11 stores program guide information.

That is, by operating a key (not shown) provided on the timer device 12, a trigger signal is supplied from the timer device 12, and program guide information is stored at that timing. As described above, this program guide information is program identification information of a desired program selected from among a plurality of program information displayed by a television receiver (not shown). Furthermore, the storage circuit 11 periodically captures and stores program identification information in a broadcast signal received during scheduled recording standby. This storage is also automatically performed under control from the timer device 12. 12 is a timer device that generates a trigger signal that causes the storage circuit 11 to hold each piece of information.

Reference numeral 13 denotes a comparison circuit which inputs the program identification information and program list information inputted from the storage circuit 11, and outputs a recording request signal when it detects a match between the two.

14 is an encoder that inputs program guide information from the storage circuit 10 and restores it to a video signal. 15 is a recording device that inputs and records video signals from the receiving circuit 2 and encoder 14; 16 is a recording control circuit that controls the recording device 15 to a recording state or a recording stop state; When input from the comparator circuit 13, the recording device 15 is put into a recording state, and the video signal from the encoder 14 is superimposed on the video signal from the receiving circuit 2 for a predetermined period.

Next, the operation of this embodiment will be explained. In the television signal received by the receiving circuit 2, program identification information and program guide information are transmitted superimposed on a certain horizontal line in a vertical retrace period.

The baseband video signal from the receiving circuit 2 is sent to the recording device 1.
5. This recording device 15 has a recording control circuit 16
It enters a recording state or a recording stop state in response to a control signal from. Furthermore, the baseband video signal from the receiving circuit 2 is supplied to the detection circuit 5 of the program identification information detection means 3 and the detection circuit 8 of the program guide information detection means 7, and signals of specific horizontal lines in the vertical retrace period are not shown. The gate circuit extracts the data, the data is converted by the decoder 6, and the program identification information and program list information are stored in the storage circuit 11 and the comparison circuit 1.
Supply to 3. In this case, since the trigger signal is not inputted to the memory circuit 11 from the timer device 12, no storage is performed.

The comparison circuit 13 compares the program list information input manually into the storage circuit 11 with the program identification information and outputs a recording request signal. Further, the program guide information is inputted from the decoder 9 to the storage circuit 10 of the program guide information detecting means 7 and stored therein. This program guide information in the storage circuit 10 is restored to a video signal by the encoder 14 and supplied to the recording device 15. When the recording request signal is input from the comparator circuit 13, the recording control circuit 16 puts the recording device 15 into operation, and adds the video signal of the encoder 14 to the video signal of the receiving circuit 2 for several seconds by counting the signal of the timer device 12. Control is performed to record in a superimposed manner. In this way, records of reserved programs and their program guide information are recorded on the magnetic tape.

In another embodiment, the recording control circuit 16 causes the recording device 15 to skip forward to the beginning of the magnetic tape, record the program list information on the encoder 14, and then causes the recording device 15 to rewind to the original position. By recording the video signal of the receiving circuit 2, an index is formed at the beginning of winding of the magnetic tape.

[Effects of the Invention] As explained above, by recording the time and title of the program guide information at the beginning of recording or at the beginning of winding of the magnetic tape, a recording history can be obtained, and by simply playing back the history. You can know the contents of the recording.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the video tape recorder of the present invention. 1... Antenna 2... Receiving circuit 3... Program information detection means 4... Program identification information detection means 5.8... Detection circuit 6, 9... Decoder 7...
Program guide information detection means 10.11...Storage circuit 12.
... Timer device 13 ... Comparison circuit 14 ... Encoder 15 ... Recording device 16 ... Recording control circuit Agent Patent attorney Noriyoshi Chika Yudo Hiroshi Uji

Claims (1)

[Claims] Receiving for extracting the video signal from a television signal in which program information corresponding to a broadcast program is broadcast superimposed on a specific period of a video signal of the program, and program guide information is broadcast superimposed on a specific period of the video signal. a circuit; a storage means for detecting the program guide information from the video signal and selecting and storing program information of a desired program from the information; a detection means for detecting program information from the video signal; a comparison circuit for detecting coincidence of each program information of the detection means; an encoder for restoring the program information of the program detection means into a video signal; a recording device for inputting the video signal from the reception circuit and the encoder; and the comparison circuit. A video tape recorder comprising: recording control means for controlling start and stop of a recording state of the recording apparatus according to coincidence outputs; and recording means for recording a video signal from the encoder for a predetermined period.