JPS6117241A - Magnetic recording and reproducing device provided with receiving device - Google Patents

Abstract

PURPOSE:To record exactly and automatically only a part which is deisred to record of a broadcast by transmitting a control signal for indicating each start and end, when a program is started and ended, in addition to a digitally processed sound signal or video signal from a broadcasting station, receiving this control signal, and controlling a magnetic recording and reproducing device. CONSTITUTION:In case of broadcasting by PCM system, immediately before the next program 16 is started, a program start control signal 15 is transmitted and received. This signal is amplified, detected and demodulated by a receiving circuit 5, outputted to an output terminal 7 of a control signal, inputted to an input terminal 9 of a control signal of a magnetic recording and reproducing device 10, applied to a controlling circuit 12, drives a magnetic tape, and recording is started. When an end control signal 17 is transmitted and received as soon as the program 16 is ended, it is operated so that a mechanism 13 is switched to an REC-PAUSE state from an REC-PLAY state. As a result, the running of the magnetic tape is stopped, and the recording is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus that more reliably and automatically performs recording when recording and reproducing broadcasts. , Conventional configurations and their problems In recent years, magnetic recording and reproducing devices such as tape recorders and VTRs have become widespread, and their main use is to record and reproduce broadcasts. The procedure for recording a broadcast is to carefully monitor the broadcast before the program starts, and then immediately start recording as soon as the desired program starts. In addition, if the program is not continuously monitored until the end and recording is stopped quickly when the program ends, extra programs will be recorded and extra tape will be used. Also, disc jockey on FM broadcast etc.
If you want to record only the music and not the commentary, etc., you can monitor the commentary carefully, wait for the commentary to end, start recording just before the music starts, and record at the same time as the music ends. must be stopped, but
It is very difficult to do this perfectly, and it very commonly happens that part of the commentary is recorded before the music starts, and part of the commentary is recorded after the music ends. Also, when recording your absence using a timer etc.
Conditions become even worse. First, the accuracy of the timer becomes a problem. The start time of recording depends on this accuracy. Also,
Even if the accuracy is good, turning on the timer will take time for the device to operate after the power is turned on and before the start of recording, and the start of recording will be delayed. Furthermore, it is impossible to cut commercials, and furthermore, it is impossible to stop recording even after the program ends because the timer runs out.

In this way, recording and reproducing broadcasts is a very common practice, but it is possible to record only the desired part.
OBJECT OF THE INVENTION The present invention is intended to solve the above-mentioned conventional problems, and to ensure that
It is an object of the present invention to provide a magnetic recording and reproducing device equipped with a receiving device that can automatically record and reproduce a target portion of a broadcast.

Structure of the Invention The present invention provides, in addition to digitally processed audio signals and image signals from broadcasting stations, at the start of a program, at the end of a program, at the start of a performance of music, etc., at the end of a performance, etc. Sending a control signal indicating the start and end of each, receiving this control signal, and controlling the magnetic recording/reproducing device to start or stop recording audio signals or image signals using this control signal. This makes it possible to automatically record only the part of the broadcast that you want to record, and
The control signal can be transmitted as an independent signal that does not affect the audio signal or image signal at all.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram of a magnetic recording and reproducing apparatus equipped with a receiving device according to an embodiment of the present invention. In Figure 1,
1 is a broadcasting station, and 2 is its transmitting antenna. 3 is a receiving antenna. 4. Receiving devices such as FM receivers and television receivers.

6 is a receiving circuit that performs amplification and detection. 6 is an output terminal for audio signals and image signals, and 7 is an output terminal for control signals. 1
0ge magnetic recording and reproducing device. This is an input terminal for the 8th sound signal and image signal, and the input terminal for the 9th stage control signal. Reference numeral 11 is a recording circuit, and reference numeral 12 is a control circuit for controlling the operation of the magnetic recording/reproducing device. 13 is a mechanism for driving a magnetic tape or the like. The output terminal 6 for audio signals and image signals of the receiving device 4 and the input terminal 8 for audio signals and image signals of the magnetic recording and reproducing device 10 are connected, and the receiving device 4
The output terminal 7 for the 0 control signal is connected to the input terminal 9 for the control signal of the magnetic recording/reproducing device 10.

The operation of this embodiment configured as above will be described below with reference to FIG. 2.

First, a program is transmitted from the broadcasting station 1 and the transmitting antenna 2 in FIG. 1 as shown in FIG. 2 (+a). In Figure 2 (l), 16 is the program you want to record, 14 is the previous program, commercials, etc. 1sHjB is the commercial after the program you want to record, or the next program. 15 is the program 16 you want to record. This is the start control signal for program 17 and the end control signal for program 16 to be recorded.The passage of time is written from left to right in Fig. 2.With this passage, as shown in Fig. The signal is broadcast from the receiving antenna 3 and received by the receiving device 4.The signal is amplified and detected by the receiving circuit 5, and an audio signal, an image signal, and a control signal are output. The signal is separately outputted to the output terminal 6 and the control signal is outputted to the output terminal 7.Then, the signal is inputted to the respective input terminals 8 and 9 of the magnetic recording/reproducing apparatus 1o.

The magnetic recording/reproducing device 10 is already in a state where current is applied and the recording state is in a so-called RIC-PAUSE state. Program 14 is currently being transmitted and received. Immediately after this program 14 ends and the next program 16 begins, a program start control signal 16 is transmitted and received. This signal is amplified, detected, and demodulated by the receiving circuit 6, outputted to the control signal Ω output terminal 7, and inputted to the control signal input terminal 9 of the magnetic recording/reproducing apparatus 1o. This signal is applied to the control circuit 12 which changes the mechanism 13 for driving the magnetic tape from the REC-PAUIK state to the REG-PI to REG-PI state.
Switch to AY state and start magnetic tape running. At this time, audio signals and image signals have already been input to the recording/recording circuit 11 from the input terminal 8 and have reached the recording head of the mechanism 13, and recording starts at the same time as the magnetic tape is running.

Simultaneously with the end of the program 16, the end control signal 17 is transmitted and received as shown in FIG. from the output terminal 7 of the control signal of the magnetic recording/reproducing device 1.
00 input terminal 9 to the control circuit 12, which in turn changes the mechanism 13 from the REC-PLAY state to the RI
It operates to switch to the C-PAUSE state. As a result, the magnetic tape stops running and recording stops. With the above operation, only the period from when the broadcast station transmits the start control signal until the end control signal is transmitted is
It will be recorded automatically.

FIG. 2(b) shows an example of a program such as a music disc jockey. FIG. 2(b) shows the state of transmission from the broadcasting station. 19 is an explanation etc. before the music performance begins. Thereafter, the start control signal 2o is generated, and the performance 21 starts immediately after that. Immediately after the performance 21 ends, there is an end control signal 22, after which the commentary 23 begins. Start control signal 24 immediately before the beginning of the musical performance 26
Tomorrow, at the same time as the performance 2g ends, there is an end control signal 26. After that, the second explanation begins again. Broadcast σ like this
, the operation of this embodiment is as follows:
In the PAUSE state, a start control signal of 20 causes the REO
- PLAY, and the end control signal 22 causes the RH to turn again.
O-PAUSE, and then R again due to the start control signal 24.
It becomes EC-PLAY. Then, the end control signal 26 causes R11-P to enter USK, and the operation is repeated.

As a result, only Performances 21 and 26 were recorded, and Commentary 1
9, 23, and 27 cannot be recorded at all.

Next, a method of broadcasting the control signal will be explained. Digital broadcasting is being planned as a means of broadcasting high-quality audio. This f'L converts audio into a digital signal such as the POM system and broadcasts it.

The audio level at the instant of U and S is expressed as a coded pulse train, and by transmitting and receiving audio level data at that instant and the next instant, the original audio is reproduced. be. The pulses of this pulse train are called bits, and if the data representing the audio level is made up of 16 pulse trains, then the 16-bit PCM system is used. By roughly increasing the number of bits in this pulse train, it is also possible to simultaneously transmit and receive various information in addition to audio data. This pulse train of audio data, etc. for 1 frame is called one frame, and it is necessary to decide in advance what position and position in one frame are audio data, and from what position to what position are other information. Take it out depending on the purpose,
By performing each process, it is possible to reproduce the desired information.

FIG. 3 shows an example of one frame.

In FIG. 3, 51 is a synchronization bit, which indicates the start of one frame. 53 is a data bit of the audio signal level. Reference numeral 62 is a bit for other information, and control signal information indicating the start or end of a program can be placed in this part. After transmitting in this way, on the receiving side, the audio demodulation circuit extracts only the data bit 53 part of the audio signal level and demodulates it, and the control signal receiving circuit extracts the data bit 53 part containing the control signal information.
By extracting only the second part and obtaining the control signal output, it is possible to obtain the audio signal and the control signal completely independently. Note that although only audio signals have been described above, image signals can also be transmitted and received as digital data, and can be easily applied to digital image broadcasting and the like.

Effects of the Invention According to the present invention, in addition to audio signals and image signals that have been digitally processed from a broadcasting station, it is possible to receive signals at the start of a program, at the end of a program, at the start of a performance of music, etc., and at the end of a performance. Control signals indicating the start and end of each signal are transmitted and received, and the magnetic recording and reproducing device is controlled to start and stop recording audio and image signals based on these control signals. By controlling the system, it is possible to reliably and automatically record only the part of the broadcast that you want to record, without having to constantly carefully monitor and quickly operate the equipment. Roughly speaking, even if you are not present, turn on the magnetic recording/reproducing device to REC-PA a little before the part you want to record starts.
If you set it to the USE state, you can automatically record the desired part without touching it afterwards, and you can reduce the use of extra magnetic tape to the minimum necessary.

Furthermore, the control signals indicating the start and end of the transmission can be output completely separately from the audio and image signals received at the same time, so they have no effect on the recorded audio and image signals. It can be implemented.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a magnetic recording and reproducing device equipped with a receiving device according to an embodiment of the present invention, Fig. 2 is a waveform diagram for explaining a broadcast signal, and Fig. 3 is one frame of a digital signal such as the 1dPcM system. FIG. 5... Receiving circuit, 11... Recording circuit, 1
2...control circuit, 13...mechanism.

Claims (1)

[Claims] In broadcasting by converting audio signals and image signals into digital signals such as PCM system, in addition to the bits for audio signal data and image signal data, there is also a bit for control signals, and this bit is used to control the program. At the start of a program, at the end of a program, or at the start or end of a performance of music, etc.
By transmitting a control signal representing the start and end of each, and receiving the control signal representing the start, recording of the transmitted audio signal or image signal is started, and by receiving the control signal representing the end. , a magnetic recording and reproducing device comprising a receiving device configured to stop recording of transmitted audio signals and image signals.