JPH07118146B2 - Magnetic recording / reproducing device - Google Patents

Description

The present invention relates to a magnetic recording / reproducing apparatus capable of recording / reproducing terrestrial broadcasting and satellite broadcasting.

"Prior art" With the start of SHF band satellite broadcasting using geostationary satellites, satellite broadcasting can be received even on ordinary TV receivers by adding a parabolic antenna and adapter. . In this satellite broadcasting, the audio signal is converted into a PCM signal so that high quality reproduced audio can be obtained. The A mode having four channels with a frequency band of 15 kHz and the B mode having two channels with a frequency band of 20 kHz. There are two modes.

Furthermore, there are TV audio, independent audio, and main-sub audio depending on how the channels are assigned. Assuming that each channel is the first, second, third, and fourth channels, for example, in the case of A mode, in addition to the realistic 4-channel stereo broadcast in which all the first to fourth channels are assigned, And assign the second and second channels to stereo TV audio,
Broadcasts in which the third and fourth channels are assigned as stereo independent voices to the second voice or BGM, or the first or third channel is assigned to the monaural main voice, and the second or fourth channel is assigned to the monaural voice. There are primary and secondary audio broadcasts assigned to foreign languages and commentary as secondary audio. In the B mode, a stereo music program that emphasizes sound quality using a wide band is mainly broadcast. Therefore, unlike in the A mode described above, channels are rarely divided, but broadcasting is performed with main and sub audio. You can also The channel combination mode of audio signals can be set with a BS (broad satellite: satellite broadcasting) tuner.

An example of the channel combination mode of this audio signal will be given.

(1) In the case of 4-channel stereo broadcasting in A mode Play back in 4-channel stereo.

Play only the front two channels on the first and second channels.

The front two channels and the rear two channels are combined and reproduced on the first and second channels.

(2) In the case of broadcasting by A mode TV sound and independent sound TV sound is reproduced on the first and second channels.

Independent audio is played on the first and second channels.

The TV sound and the independent sound are combined and reproduced on the first and second channels.

Television sound is reproduced on the first and second channels, and independent sound is reproduced on the third and fourth channels.

(3) In the case of broadcasting by A mode television sound only Television sound is reproduced on the first and second channels.

(4) In the case of A-mode and B-mode main-sub audio broadcasting, the main audio is reproduced on the first and second channels.

The sub audio is reproduced on the first and second channels.

The main voice and the sub voice are synthesized and reproduced on the first and second channels.

(5) In the case of B mode stereo broadcasting, it is played back in 2 channel stereo.

Note that when playing back only on the first and second channels, the third
And the same signal may be reproduced on the fourth channel. When the first and second channels are stereo audio signals, they may be combined and reproduced as monaural audio.

In a conventional magnetic recording / reproducing apparatus compatible with satellite broadcasting, when a broadcasting station is selected by a BS tuner, a video signal and an audio signal output from the BS tuner are recorded. However, for audio signals, the BS tuner decodes satellite broadcast audio signals sent as PCM signals into 4-channel or 2-channel audio signals according to the broadcast mode (A or B), but magnetic recording is performed. The channel combination mode of the audio signals output to the playback device was determined by the combination set by the BS tuner.

"Problems to be solved by the invention" Since the conventional magnetic recording / reproducing apparatus does not have a built-in BS tuner, control of satellite broadcast recording by selecting the channel combination mode of the receiving station and the audio signal from the magnetic recording / reproducing apparatus side. I can't. In other words, when attempting to make time reservations for multiple programs continuously with timer recording, it is limited to the channel combination mode of the receiving station and audio signal that was initially set, and audio recording and playback of various combinations cannot be performed, and I could not take advantage of satellite broadcasting.

It is an object of the present invention to obtain a magnetic recording / reproducing device capable of reproducing an audio signal in any channel combination mode when reproducing a program.

"Means for Solving Problems" The present invention has been made to explain the problems as described above, and a terrestrial broadcasting television receiving circuit for receiving terrestrial television broadcasting and this terrestrial broadcasting television receiving. A satellite broadcast television receiving circuit for receiving television broadcast from a satellite provided outside the device housing the circuit, and a video signal selecting circuit for selecting a video signal from the terrestrial broadcast television receiving circuit and the satellite broadcast television receiving circuit. A video magnetic recording / reproducing apparatus for recording / reproducing any video signal, an audio signal selecting circuit for selecting an audio signal from the terrestrial broadcasting television receiving circuit and the satellite broadcasting television receiving circuit, and a PCM recording A magnetic recording / reproducing apparatus for audio having two magnetic recording / reproducing systems, a reproducing system and an FM recording / reproducing system, for recording / reproducing an audio signal of either terrestrial broadcasting or satellite broadcasting. A system control circuit for controlling the entire apparatus, wherein the satellite broadcast television receiving circuit receives a satellite broadcast tuner and a control signal sent from the system control circuit via a serial or parallel transmission line. And a control unit for decoding the received signal and controlling the satellite broadcast tuner unit. The system control circuit includes a CPU for arithmetic control, a receiving station and a broadcast receiving mode of the satellite broadcast television receiving circuit. An input unit for inputting the conditions for selecting, a memory for storing the conditions input from the input unit, a display unit for displaying the input conditions and the stored conditions, and the satellite broadcast. A satellite broadcasting television receiving circuit is reserved according to the conditions stored in the memory, which comprises a transmitting portion for transmitting a control signal for controlling the television receiving circuit. Control so as to switch to a receiving station, and switch the video signal selecting circuit and the audio signal selecting circuit in accordance with the receiving circuit of the broadcast for recording, and the control signal by the transmission line is the power source of the satellite broadcasting television receiving circuit. Power on / off, which is a non-compulsory command to turn on / off, a compulsory command on, which is a compulsory command to prevent the satellite broadcast television receiving circuit from accepting any command other than the compulsory command, It has at least five commands: a forced command release, which is a forced command to be accepted, and a receiving station selection, which is a non-forced command that selects the receiving station of the satellite broadcast television receiving circuit, and is forced by the control signal receiving section. When command ON is received, this command is given priority and commands other than the forced command are not accepted and forced. When a command release is received, it returns to the normal routine that accepts commands other than the compulsory command.

"Operation" Input the conditions of the desired program of satellite broadcasting from the input unit and reserve the recording. The input condition is stored in the memory and the control is started for recording the program when the time condition is satisfied. Then, the system control circuit outputs a control signal (command) necessary for allowing the satellite broadcast television receiving circuit to record the reserved program according to the conditions stored in the memory.

This command includes power-on to turn on the BS tuner, power-off to turn off the power as well, after which commands other than forced commands are not accepted and forced command on prioritizing satellite broadcast recording and forced command release The command has at least five commands: forcible command release to return to the normal routine for accepting the above command, and reception station selection for selecting the reception station of the BS tuner section. These commands are received by the receiving section of the satellite broadcast television receiving circuit, and are decoded to control the tuner to select the target broadcasting station.

On the other hand, the video signal selection circuit and the audio signal selection circuit are switched to the satellite broadcast television reception circuit side, and the program is recorded by the video magnetic recording / reproducing apparatus and the audio magnetic recording / reproducing apparatus.

The video signal and the Hi-Fi audio signal are recorded on the video tape in the magnetic recording / reproducing circuit for the video signal. Also, when the recorded video signal is reproduced, video and audio are output as in the conventional case. Next, in the audio magnetic recording / reproducing circuit, both are separately recorded on the tape by the two magnetic recording / reproducing systems of the PCM recording / reproducing system and the FM recording (Hi-Fi and linear) reproducing system. When reproducing the recorded audio signal, both the audio signal by PCM recording and the audio signal by FM recording (Hi-Fi and linear) are reproduced and selectively output.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1) is a terrestrial broadcast television receiving circuit (hereinafter, referred to as a BC tuner) for receiving a terrestrial television broadcast, and (2) is provided outside the device accommodating the BC tuner (1), Satellite broadcasting TV receiving circuit for receiving satellite TV broadcasting, BS tuner (2a) for receiving satellite broadcasting, receiving unit (2c) for receiving control signal, decoding reception control signal at this receiving unit (2c) Shi said BS tuner (2a)
The control unit (2b) for controlling the.

The video signal output terminals (3) and (4) of the BC tuner (1) and the BS tuner (2) are connected to a video magnetic recording / reproducing device (5) for recording / reproducing the video signal. Also, the audio signal output terminal (6) of the BC tuner (1)
(7) and the TV audio signal output terminals (8) and (9) and the independent audio signal output terminals (10) and (11) of the BS tuner (2)
Is coupled to an audio magnetic recording / reproducing device (12).

Further, (13) is a system control circuit for controlling the entire apparatus.

The video magnetic recording / reproducing apparatus (5) includes a video signal selection circuit (14), a video recording and reproducing process section (15) (1).
6), recording and playback amplifier (17), video head (1
8), video output terminal (19).

The audio magnetic recording / reproducing apparatus (12) includes an audio signal selection circuit (20), a PCM recording and reproducing process section (21) (2).
2), recording and playback amplifier (23), voice head (2
4), PCM output terminal (25), FM voice recording and playback process section (26) (27), recording and playback amplifier (28), voice head (29), FM output terminal (30).

The system control circuit (13) includes an arithmetic control CPU (31), R
OM (32), input unit (33) for specifying the channel combination mode of reception and audio signals, RAM (34) for storing input conditions, start of reservation recording according to the time condition input from the input unit Timer reservation circuit (35) for inputting signals to CPU, display section (36) for displaying input conditions, storage conditions and timer reservation, I / O circuit for input / output to external circuit (37), satellite broadcasting TV receiver circuit (2)
It is composed of a transmission section (37a) for transmitting a control signal for controlling, and is coupled to the reception section (2c) via a serial or parallel transmission line (37b).

As shown in FIG. 2, the video signal selection circuit (14) has a BC
It is composed of a first switch (38) having a tuner terminal (BC) and a BS tuner terminal (BS), and a second switch (39) having a Hi-Fi terminal (Hi-Fi) and a PCM terminal (PCM). .
The audio signal selection circuit (20) is a BC tuner terminal (BC),
Third, fourth and fifth switches (40) (41) each having a TV audio terminal (TV sound) and an independent audio terminal (independent sound)
It consists of (42).

The operation of the above configuration will be described.

When conditions such as the start / end time of reception of the desired program are input from the input section (33) of the system control circuit (13), the CPU
These conditions are stored in the RAM (34) via (31). Then, when the condition of the start time is satisfied, a signal is output from the timer reservation circuit (35) to the CPU (31), and a control signal (command) necessary for recording a designated program is sent to the CPU (3
1) Input / output I / O circuit (37), transmitter (37a), serial or parallel transmission line (37b), and video signal selection circuit via I / O circuit (37) Control signals are sent to the audio signal selection circuit (20) (14). The control signal transmitted from the transmitter (37a) is received by the receiver (2c), decodes the received signal and sends it to the controller (2b), and the controller (2b) uses the BS tuner (2a). Is controlled.

Then, the BS tuner section (2a) starts reception of the designated broadcasting station, and outputs a video signal to the video signal selection circuit (14) and an audio signal to the audio signal selection circuit (20).

There are nine types of commands for controlling the BS tuner section (2a) as follows.

(1) Turn on the power of the BS tuner (2a) "Power on" (2) Similarly, "Power off" (3) After that, commands other than "forced commands (on and release)" are not accepted and the satellite broadcast "Forced command on" that gives priority to recording (to prevent the status of the tuner such as the receiving station from changing during recording) (4) After that, a normal routine that accepts commands other than "forced command (on and cancel)" Return "Forced command release" (5) "Direct receiving station command" that commands the receiving station of the BS tuner (2a) (6) "Receive station command up / down" (7) that also raises / downs the receiving station position "TV sound" in which the audio output of the BS tuner (2a) in the A mode is TV sound (8) Similarly, "independent sound" in which independent sound is output (9) L and R sounds are output independently -Sub "9 types As an example of control by a command signal, (A) In the case of timer recording, (1) → (5) → (3) → (4) → (2) Fig. 3 shows from the transmitter (37a) to the receiver ( 2
The command signal to c) and the waveform example of the recording mode are shown. The command signal includes a "header" indicating the beginning of the command, a "device code" indicating which device the command is for, and a "command" indicating the command. There is a code.
The power of the BC tuner (1) is turned on by the command of "power on", and the reception is switched to a predetermined broadcasting station by the command of "direct receiving station command". Then, the command other than the "forced command" is not accepted by the "forced command on", and the recording of the program is started by the video magnetic recording / reproducing apparatus and the audio magnetic recording / reproducing apparatus.

When the condition for the recording end time is met, a signal is output from the timer reservation circuit (35) to the CPU (31), and the video magnetic recording / reproducing apparatus and audio magnetic recording / reproducing apparatus end recording. When the recording is completed, the "forced command release" command is used to accept a normal routine, that is, a command other than the "forced command" is accepted, and the "power off" command turns off the power of the BS tuner unit (2a).

(B) In case of selecting the broadcasting station of the BS tuner section (2a), (1) → (5) → (9) → (2) or (1) → (6) → (9) → (2) Switching of (38) to (42) of the first to fifth switches will be described. When recording a terrestrial broadcast program, the CPU (31) inputs a control signal to the video signal selection circuit (14) and the audio signal selection circuit (20) via the I / O circuit (37), and the terrestrial broadcast Control to record. That is, in the video signal selection circuit (14), BC is selected by the first switch (38).
Select the tuner terminal (BC) and use the second switch (39)
The Hi-Fi terminal (Hi-Fi) is selected to record the video signal from the BC tuner (1) on the tape via the video recording process section (15), recording amplifier (17) and head (18).

In the audio magnetic recording / reproducing apparatus (12), the third switch (4
0) selects the BC tuner terminal (BC), encodes the audio signal from the BC tuner (1) into a PCM signal by the PCM recording process unit (21), and passes through the recording amplifier (23) and head (24) to tape. To record. Also, the fourth and fifth
Select the BC tuner terminal (BC) with the switches (41) (42), FM-modulate the audio signal from the BC tuner (1) by the FM audio recording process section (21), and record amplifier (28), head (29) ) And record it on the tape.

When recording a program with satellite broadcasting, the CPU (31) uses I / O
A control signal is input to a video signal selection circuit (14) and an audio signal selection circuit (20) via a circuit (37) to control to record satellite broadcasting. That is, the video signal selection circuit (14)
Then, select the BS tuner terminal (BS) with the first switch (38), and select the Hi-Fi terminal (Hi-Fi) with the second switch (39).
Is selected to record the video signal from the BS tuner (2) on the tape via the video recording process section (15), recording amplifier (17) and head (18).

In the audio magnetic recording / reproducing apparatus (12), the third switch (4
Select the TV audio terminal (TV sound) or independent audio terminal (independent sound) with 0) and PCM-modulate the TV audio signal or the independent audio signal from the BS tuner (2) with the PCM recording process section (21), Recording is performed on the tape via the recording amplifier (23) and the head (24).

Also, select the TV audio terminal (TV sound) or independent audio terminal (independent sound) with the 4th and 5th switches (41) (42) to select the TV audio signal or the independent audio signal from the BS tuner (2). FM
FM is modulated by a voice recording process section (21) and recorded on a tape via a recording amplifier (28) and a head (29).

In addition, when the PCM terminal (PCM) is selected by the second switch (39), regardless of which the first switch (38) selects.
Only PCM audio is recorded on the video tape.

The video signal recorded as described above is reproduced by the amplifier (1
7), video playback process section (16), video output terminal (19)
It is output from and played. For the audio signal, regardless of whether you select PCM, Hi-Fi, or linear, each playback amplifier (2
3) or (28), regeneration process section (22) or (27)
And then output and played.

Although the timer reservation circuit (35) is composed of an independent circuit in the above embodiment, it may be composed of a part of the ROM (32) and a part of the RAM (34).

In the above-described embodiment, the "device code" included in the command signal indicates which device the command is for (BC tuner, BS tuner, etc.).
The command may be output only to the device to be controlled. However, in this case, a hardware gate circuit is required.

"Effects of the Invention" Since the present invention is configured as described above, it is possible to record and reproduce not only terrestrial television broadcasting but also satellite television broadcasting. In particular, satellite broadcasting has a 2-channel independent audio signal in addition to a video signal and 2-channel television audio signal. The audio magnetic recording / reproducing apparatus has two systems, a PCM recording / reproducing system and an FM recording / reproducing system. Since it has a magnetic recording / reproducing system, all audio signals can be recorded, and it is possible to select TV audio, independent audio, main / sub audio, etc. during reproduction.

In addition, satellite broadcasting is "powered on" via the transmission line,
The BS tuner unit connected to the outside can be effectively controlled by a combination of five command signals of "power off", "forced command on", "forced command release", and "reception station selection".

That is, a general VCR with a built-in tuner does not accept operations other than recording stop during recording, but if the BS tuner is provided externally as in the premise of the present invention, the BS tuner is not available. There is a possibility that the receiving state of the receiving station or the like may be changed by the operating means provided in itself. In the present invention, the BS tuner connected to the outside is controlled to be prohibited or permitted by "forced command on" and "forced command release", so that the BS tuner can be effectively controlled.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention, FIG. 2 is a concrete circuit diagram of a video / audio signal selection circuit, and FIG. 3 is an operation waveform diagram of recording and command signals. . (1) …… terrestrial broadcast television receiver circuit (BC tuner), (2) …… satellite broadcast television receiver circuit, (2a) …… BS tuner, (2b) …… control unit, (2c) …… receiver unit, (5) ... magnetic recording and reproducing device for video, (12) ... magnetic recording and reproducing device for audio, (13) ... system control circuit.

Claims (1)

[Claims] 1. A terrestrial broadcast television receiving circuit for receiving a terrestrial television broadcast, and a satellite broadcast television receiving for receiving a television broadcast from a satellite provided outside a device accommodating the terrestrial broadcast television receiving circuit. A circuit and a video signal selection circuit for selecting a video signal from the terrestrial broadcast television receiving circuit and the satellite broadcast television receiving circuit,
A magnetic recording / reproducing apparatus for video recording / reproducing any one of the video signals, an audio signal selecting circuit for selecting an audio signal from the terrestrial broadcasting television receiving circuit and the satellite broadcasting television receiving circuit, a PCM recording / reproducing system and FM. An audio magnetic recording / reproducing apparatus for recording / reproducing an audio signal of either terrestrial broadcasting or satellite broadcasting, and a system control for controlling the entire apparatus, which has two magnetic recording / reproducing systems including a recording / reproducing system. The satellite broadcast television receiving circuit comprises a satellite broadcast tuner, a receiver for receiving a control signal sent from the system control circuit via a serial or parallel transmission line, and a received signal. The system control circuit decodes and controls the satellite broadcast tuner unit. An input unit for inputting a condition for mode selection, and a display unit for displaying a memory for storing the input condition from the input unit, the input conditions and storage conditions,
And a control unit for transmitting a control signal for controlling the satellite broadcast television receiving circuit, controlling the satellite broadcast television receiving circuit to switch to a reserved receiving station according to the condition stored in the memory, and The video signal selection circuit and the audio signal selection circuit are switched in accordance with the receiving circuit of the broadcast for recording, and the control signal by the transmission line is a non-compulsory command for turning on / off the power of the satellite broadcast television receiving circuit. ON, OFF, forced command that is a compulsory command that the satellite broadcast TV receiving circuit does not accept other than compulsory commands. ON, forced command that is a compulsory command that allows the satellite broadcast TV receiving circuit to accept other than compulsory commands. , The satellite broadcasting television receiving circuit is a non-forced command to select a receiving station, which is a receiving station selection, At least five commands are provided, and when the control signal receiving unit receives a compulsory command ON, it gives priority to this command and does not accept any command other than the compulsory command. A magnetic recording / reproducing apparatus characterized in that a normal routine for receiving is returned.