JPS5994940A - Selective recording system of broadcast program - Google Patents

Abstract

PURPOSE:To attain recording capable of selecting automatically a broadcast program by inserting at least two kinds of frequencies in a frequency difference possible for discrimination by an audible frequency to a non-sound broadcast band to drive and control a pause mechanism of recording side. CONSTITUTION:Various control signals are transmitted in the non-sound broadcast band at the broadcast side. The broadcast radio wave is received on a receiver 6 via a receiving antenna 5 and broadcast from a speaker 8 via an amplifier 7. The control signals are transmitted to a signal discriminating circuit 10 via a preamplifier 9 and supplied to a control circuit 12 by a selecting means and a switching means 11 so as to be suitable for the control mode by discrimination and selection. The circuit 12 drives the pause mechanism drive means 14 of a recorder by an input signal for operating on/off and records the content of the broadcast program automatically with selection.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a broadcast recording system in which a pause machine of a recording device is automatically operated by a signal from the broadcasting side.

As is well known, recording of music programs on FM broadcasts,
When video recording in television broadcasts, commercials, unnecessary commentary, etc. get in the way during playback, so listeners who do not like such broadcasts that do not require recording manually operate a pause mechanism so that the relevant parts are not recorded.

However, manually excluding broadcast portions that do not need to be recorded from recording each time is inconvenient in that the operations are extremely complicated and troublesome, and it is difficult to accurately exclude them from recording.

The present invention aims to provide a broadcast recording system that can eliminate such inconveniences.

The system of the present invention will be explained below with reference to the accompanying drawings. Figure 1 is a contrast diagram showing the program structure on the broadcasting side and the operation of the pause mechanism on the recording side, and A shows changes over time in the program content on the broadcasting side. , B show changes over time in the music recording operation on the recording device side, and C shows changes over time in the recording operation on the same recording device side excluding only commercial broadcasts.

The above program structure A is composed of a desk jockey broadcast band DJ, a commercial broadcast band CM, a song title guide broadcast band MI, and a music broadcast band M. There is a predetermined time, for example, 0.5 seconds, between the broadcast bands of each part. A silent broadcast band S is interposed.

The broadcasting side transmits various control signals a, b, c%d during the silent broadcast band S, and these control signals cause the pause mechanism on the recording side to operate so as to stop the recording operation of the recording device ( (hereinafter referred to as an "on operation"), or an operation to restart the recording operation of the recording apparatus (hereinafter referred to as an "off operation").

In the embodiment, the signal a is transmitted before the desk jockey voice starts broadcasting the broadcast band DJ, and the signal a is the song title guide broadcast band M.
The pause mechanism is set to be turned on by signal a and turned off by signal a.

Therefore, in this B mode, only the song title and music can be selected and recorded on the recording device side, and desk jockeys and commercials are excluded from recording.

On the other hand, in C mode, the pause mechanism is turned on by the signal C transmitted before the broadcast of the commercial broadcast band CM.
In addition, the signal d transmitted after the commercial broadcast band CM is broadcast.
Since the pause mechanism is set to turn off,
On the recording device side, all broadcast contents except commercials are recorded.

In all of the above examples, commercial broadcasts are set as unnecessary broadcast bands, but depending on the case, the above pause mechanism may be configured to select and record only commercial broadcast bands. For example, it is possible to eliminate the inconvenience of having to watch the entire broadcast band for commercial monitoring.

Since the control signal needs to be generated within the broadcast frequency band, the following problems occur.

First, if the control signal coincides with a partial frequency signal in the audio signal or video signal being broadcast, the pause mechanism will malfunction, so the control signal must be created in a special manner within the broadcast frequency band.

Second, since the control signal is generated within the broadcast frequency band, there is a risk that it will be recorded as a recording signal such as an audio signal or a video signal.

For this reason, it is necessary to distinguish the control signal from the recording signal and set it so that it relates only to the pause mechanism.

In the present invention, in order to solve the first problem, two or more control signals are generated at two or more different frequencies, and these two frequencies are selected with a distinguishable frequency difference between them. be.

Next, in the present invention, in order to solve the second problem, when the control signal is generated at a frequency in the audible frequency band, the control signal is made into a low-level signal that is inaudible or difficult to hear.

For example, the above signal is made into a composite signal of a pulse signal made at a frequency of 40011z and a pulse signal of, for example, 50 GHz, which has a frequency difference of 10% or more from this pulse signal, and this is converted to an average modulation level, that is, an average audio level. On the other hand, if it is transmitted as a low-level signal of -40 db, firstly, it is transmitted during the silent broadcast band S, so malfunctions caused by audio signals can be prevented, and since it is a combination of multiple signals, the accuracy of the signal can be improved. This solves the first problem by increasing the signal level, and at the same time, it is a low-level signal that reaches the audible frequency range, so it cannot be heard by ordinary listeners.
Therefore, the second problem can be solved by this.

In order to make the above-mentioned low-level signal even more inaudible or inaudible, it is only necessary to limit the signal between stations in the inaudible frequency band.

Next, the method of transmitting the control signal from the broadcasting side and the receiving method on the recording device side will be described with reference to FIG.

In this embodiment, l is a control signal generator, and the signal a
, b, c, and d are connected to the switch device 2 for inserting numbers into the program.

The switch device 2 is connected to the program composition section 3,
The program composition section 3 is equipped with a mixing device, a tape editing console, etc., and is configured to selectively insert the control signal into the silent broadcast band S.

The program composed by the program composing section 3 is modulated and broadcasted from the transmitting section 4 in the same manner as in the past, and the broadcast radio waves are received by, for example, an FM receiver 6 via an antenna 5 on the receiving side.

The broadcast radio waves received in this way are broadcast from the speaker 8 via the integrated amplifier 7 as before, but the control signals a, b% c, d are sent to the signal identification circuit 10 via the preamplifier 9. The signals are identified by this circuit, and are selected by a selection means, for example, the switch means 11, to be suitable for the B mode or the C mode, and are supplied to the control circuit 12.

Since the control signals a to d are multiple waves, this signal identification circuit 10 is actually constructed using a plurality of filters for each signal, and the signals identified here are further used through a logic circuit. It is designed like this.

In order to ensure the signal discrimination operation described above, a level discrimination circuit 13 is inserted between the preamplifier 9 and the signal discrimination circuit 10, and this circuit prevents signals above a certain level from passing through. By doing this, since the control signal is a low level signal, the input signal to the control circuit 12 can be limited to only the control signal.

The control circuit 12 drives a pause mechanism driving means 14 in a recording device such as a tape deck by an input signal. For example, if the switch means 11 selects the B mode as shown in the figure, the control circuit 12 pauses by a control signal a1b. Machine'!
Turns IIt on or off.

In the above, other methods may be used as the control signal identification method. For example, in the case of stereo broadcasting, if the control signal is incorporated only in either the R side or the L side, this Since it is easy to separate the control signals on the receiving side, malfunctions of the pause mechanism can be reliably prevented.

In this way, the present invention method inserts at least two types of frequencies that belong to the audio frequency range and have a mutually distinguishable frequency difference into the silent broadcast band 8 that exists in the program structure as low-level signals. However, since these two types of low-level signals drive and control the pause mechanism on the recording device side, it is possible to automatically select and record the content of the broadcast program on the recording side, and also to use the control signal. There is an advantage in that it can be reliably identified during a silent broadcast band, and there is also an advantage in that this control signal hardly interferes with the audio signal.

Furthermore, the method of the present invention can be applied to broadcasting systems currently in use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram comparing the program structure of the system of the present invention and the operation of a pause mechanism on the recording side, and FIG. 2 is a block diagram showing the configuration of the system of the present invention. In the figure, A is the program structure, S is the silent broadcast band, a, b,
c. d indicates a control signal, respectively.

Claims (1)

[Claims] Several types of broadcast bands are successively arranged, and a silent broadcast band is interposed between predetermined broadcast bands, and in this silent broadcast band, control signals generated at at least two different frequencies belonging to the audible frequency band are transmitted. The recording device that receives the broadcast radio waves of the program is provided with a pause mechanism whose operation is controlled by the control signal in the program configuration, and the receiving side records while the program is being broadcast. In a selective recording method for broadcast programs in which the recording operation of the apparatus is controlled by the operation of the pause mechanism, the control signal is generated at at least two mutually distinguishable frequencies in the audible frequency band, and the control signal is generated at at least two mutually distinguishable frequencies in the audible frequency band, and A selective recording method for broadcast programs characterized by a low-level signal that is difficult to hear.