JPH07118149B2 - 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, and more particularly to a digital audio signal of satellite broadcasting and a demodulation analog signal of a PCM decoder. This is to enable selective recording of and.

"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 solve the above-mentioned problems, and includes a terrestrial broadcasting television receiving circuit for receiving terrestrial television broadcasting, and this terrestrial broadcasting television receiving. A satellite television receiving circuit provided outside the device housing the circuit for receiving a video signal and an audio signal from a satellite, and an image for selecting an image signal from the terrestrial broadcasting television receiving circuit and the satellite television receiving circuit. A video magnetic recording / reproducing apparatus having a signal selecting circuit for recording / reproducing any video signal, and an audio signal selecting circuit for selecting an audio signal from the terrestrial broadcasting television receiving circuit and the satellite broadcasting television receiving circuit. ,
The satellite broadcast television receiving circuit comprises: a voice magnetic recording / reproducing apparatus having at least a PCM recording / reproducing circuit for supporting a voice program from the satellite broadcast television receiving circuit; and a system control circuit for controlling the entire apparatus. , BS tuner for receiving signals from satellites, and for demodulating voice signals received by this BS tuner into analog signals
A PCM decoder, a PCM digital output circuit for converting an audio signal received by the BS tuner into a digital signal for transmission to the PCM recording / reproducing circuit, and a receiving section for receiving a control signal from the system control circuit. , A control unit for decoding the received signal and controlling the satellite broadcast tuner unit, wherein the PCM recording / reproducing circuit has a digital input circuit for inputting a signal from the PCM digital output circuit and a satellite broadcast signal recording time. There is a PCM containing all the satellite broadcast audio programs received by the satellite broadcast receiving circuit tuner.
A digital code converter for converting a PCM audio signal input from the digital input circuit into a PCM recording signal format when directly recording an audio signal without demodulating, and a transmission signal for controlling the digital code converter in a transmission mode. Mode demodulator circuit and PCM received by the tuner of the satellite broadcast receiving circuit at the time of satellite broadcast signal recording
An audio signal is demodulated by a PCM decoder once, and when recording this demodulated analog signal, the demodulated analog signal of the PCM decoder is input through the audio signal selection circuit, and this demodulated analog signal is converted into a digital signal A / It consists of a D conversion circuit and a processor that selectively controls the output of these digital code converter signals and A / D conversion circuit signals.This processor converts the PCM digital signal from the tuner when the digital code converter is selected. The signal converted into the digital signal of the recording format by the digital code converter is output to the recording / reproducing amplifier, and when the A / D conversion circuit selects it, the analog signal once demodulated by the PCM decoder is digital signal by the A / D conversion circuit. The converted signal is output to the recording / reproducing amplifier, and the system control circuit
A CPU for arithmetic control, an input unit for inputting conditions for selecting a receiving station and a broadcast receiving mode of a satellite broadcast television receiving circuit, and for instructing selective output control of the processor, and from this input unit A memory for storing the input condition, a timer reservation circuit for inputting a reservation recording start signal to the CPU according to the time condition input from the input unit, the input condition, the stored condition and the timer reservation content And a display unit for displaying, and controls to switch the satellite broadcast television receiving circuit to the reserved channel in accordance with the conditions stored in the memory, and also controls the video signal selecting circuit and the audio signal selecting circuit. Switching according to the receiving circuit of the broadcast to be recorded, all the sound programs of the same channel of satellite broadcasting are independent as TV sound and independent sound. The PCM digital signals can be recorded as audio data is made so as to record and reproduce.

"Operation" Input a satellite program from the input section and reserve the recording.
The input condition is stored in the memory, and when the time condition is satisfied, the timer reservation circuit inputs the recording start signal to the CPU to start the control for recording the program. Then, the system control circuit controls the satellite broadcasting television receiving circuit to switch to the reserved channel according to the condition stored in the memory, and switches the video signal selecting circuit and the audio signal selecting circuit to the satellite broadcasting television receiving circuit side. The satellite broadcasting is recorded by the video magnetic recording / reproducing apparatus and the audio magnetic recording / reproducing apparatus. Also, when the recorded signal is reproduced, video and audio are output as in the conventional case.

Next, as the audio signal, the PCM audio signal is recorded on the tape, but the analog signal demodulated by the PCM decoder and the digital signal output from the tuner and converted into the PCM recording signal format by the digital code converter are instructed from the input section. Is selectively output and recorded. PCM input from the tuner via the PCM digital output circuit and PCM digital input circuit output
When a signal is converted into a PCM recording signal format with a digital code converter and recorded, all audio programs of the same channel of satellite broadcasting are independent audio data as TV audio and independent audio by one PCM audio signal. Can be recorded as

[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 receiving circuit) for receiving terrestrial television broadcasting. (2) is a satellite broadcasting television receiving circuit (2) (hereinafter referred to as BS receiving circuit) for receiving satellite television broadcasting, which is provided separately from the BC receiving circuit (1) and is a video signal. BS tuner (2
a), a PCM decoder (2b) for demodulating the PCM audio signal received by the BS tuner (2a) into an analog signal, and the BS
PCM digital output circuit (2c) that converts the PCM audio signal received by the tuner (2a) into another digital signal and outputs it
And a receiving unit (2e) for receiving the control signal, and this receiving unit (2e)
It comprises a control unit (2d) for decoding the reception control signal in e) and controlling the PCM decoder (2b).

The video signal output terminals (3) and (4) of the BC receiving circuit (1) and the BS receiving circuit (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 receiving circuit (1)
(7), the TV audio signal output terminals (8) and (9) and the independent audio signal output terminal (10) of the PCM decoder (2b)
(11) is coupled to the audio signal selection circuit (20) of the audio magnetic recording / reproducing device (12). Of these, the TV audio signal output terminals (8) and (9) and the independent audio signal output terminals (10) and (11) of the PCM decoder (2b) are not related to the recording and reproducing devices (5) and (12). It is also coupled to a voice mode selection circuit (43) for sending a voice signal to the device.

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 / reproducing processor (15), a recording / reproducing amplifier (17), a video head (18), and a video output terminal (19).
Consists of.

The audio magnetic recording / reproducing apparatus (12) includes the audio signal selection circuit (20), PCM recording / reproducing circuit (21), recording / reproducing amplifier (23), audio head (24), PCM output terminal (25), FM.
An audio recording / reproducing circuit (26), a recording / reproducing amplifier (28), an audio head (29), and an FM output terminal (30). The PCM recording / reproducing circuit (21) is a digital PCM audio signal (for example, 1
Digital code converter (4 bit sampling frequency 48KHz (so-called B mode), 16-bit 32KHz (so-called A mode)) is converted to the PCM recording signal format of this device (eg 14bit sampling frequency 44.1KHz) (4
6), a transmission signal mode demodulation circuit (50) for instructing the digital code converter (46) by determining whether the mode is the A mode or the B mode, determining whether to prohibit dubbing,
A / D conversion circuit (47a) (47a) (47a) that converts the analog signal demodulated by the PCM decoder (2b) into a digital signal in the recording format
b), a PCM audio recording / reproducing processor (22) for selectively outputting these two digital signals and controlling switching of the reproduced signal to the output terminals (25) (25), the C
It is composed of an internal controller (48) that controls the inside by receiving a signal from the PU (31).

The system control circuit (13) includes an arithmetic control CPU (31), R
The OM (32), which comprises an input section provided on the main unit and an input section for remote control, commands the satellite broadcast channel and broadcast reception mode, and also the audio mode of the external audio mode selection circuit (43). Command independently,
Furthermore, the internal controller (4
8) Input section (33) for commanding, RAM (34) for storing the input condition, timer reservation circuit for inputting a reservation recording start signal to the CPU according to the time condition input from the input section (35), a display unit (36) for displaying the input condition, the stored condition and the timer reservation, an I / O circuit (37) for input / output to an external circuit, and the satellite broadcast television receiving circuit (2) ), A transmission section (37a) for transmitting a control signal for controlling.

An output terminal (45) coupled to an external device via an output amplifier (44) is provided on the output side of the audio mode selection circuit (43).

The video signal selection circuit (14), as shown in FIG.
A first switch (38) having a BC tuner terminal (BC) and a BS tuner terminal (BS), a Hi-Fi terminal (Hi-Fi), and a PCM
It is composed of a second switch (39) having a terminal (PCM), and a common terminal of the second switch (39) is connected to the video recording / reproducing processor (15).

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)
(42), the common terminal of the third switch (40) is
The second switch (3) of the video signal selection circuit (14) is connected to the inputs of the A / D conversion circuits (47a) (47b).
9) Connected to the PCM terminal (PCM). The common terminals of the fourth and fifth switches (41) (42) are connected to the FM voice recording / reproducing circuit.

The operation of the above configuration will be described.

A command signal from the input section (33) of the system control circuit (13) is sent directly from the transmission section (37a) to the reception section (2e) via the CPU (31) and the input / output I / O circuit (37). Output.
Then, the BC receiving circuit (1), the BS receiving circuit (2), the video signal selecting circuit (14), the audio signal selecting circuit (20), and the PCM recording / reproducing circuit (21) are controlled by the command.

When a program with satellite broadcast is reserved and recorded, the broadcast type (satellite broadcast) of the desired program, the receiving station, and the start / end time conditions are input from the input unit (33). Then, the broadcast type and the condition of the receiving station are stored in the RAM (34), and the conditions of the start / end time are stored in the timer reservation circuit (35) and displayed on the display unit (36). Then, at a predetermined time, a signal is output from the timer reservation circuit (35) to the CPU (31),
A system control circuit (13) starts control for recording a program.

The CPU (31) is connected to the BS reception circuit (2) via the I / O circuit (37).
To output the conditions of the receiving station and command the start of satellite broadcast reception. Then, the BS receiving circuit (2) starts receiving the command from the receiving station from the CPU (31), and the video signal selecting circuit (14) receives the video signal, and the audio signal selecting circuit (20) receives the television audio signal and the independent signal. Output an audio signal.

On the other hand, the CPU (31) inputs control signals to the video signal selection circuit (14) and the audio signal selection circuit (20) via the I / O circuit (37) to control to record satellite broadcast. . That is, in the video signal selection circuit (14), the first switch (3
Select the BS tuner terminal (BS) with 8) and select the Hi-Fi terminal (Hi-Fi) with the second switch (39) to transfer the video signal from the BS receiving circuit (2) to the video recording / playback processor ( 1
5), recording amplifier (17) and head (18) to record on tape.

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 receiving circuit (2) with the PCM recording and reproducing circuit (21). Recording is performed on the tape via the recording amplifier (23) and the head (24).

Further, the TV audio signal (independent sound) or the TV audio signal from the BS receiving circuit (2) is selected by selecting the TV audio terminal (TV sound) or the independent audio terminal (independent sound) with the fourth and fifth switches (41) and (42). FM
FM modulation is performed by the audio recording / reproducing circuit (26), and the tape is recorded via the recording amplifier (28) and the head (29). PCM
Will be described later.

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 recording / playback processor (17), video output terminal (1
It is output from 9) and played. Whether the audio signal is PCM, Hi-Fi, or linear, each playback amplifier (23) or (28), recording / playback circuit (21) or (26)
And output from the output terminal (25) or (30).

Next, it is assumed that the digital code converter (46) is selected via the internal controller (48) of the PCM recording / reproducing circuit (21) by a command from the input section (33). Then BS
The PCM digital signal from the tuner (2a) is converted to a recording format digital signal by the PCM digital output circuit (2c),
Input to the M digital input circuit (49). The transmission signal mode demodulation circuit (50) determines whether the input signal is the A mode or the B mode, and instructs the digital code converter (46) to convert the input signal again into a predetermined digital signal.
Audio recording / playback processor (22), recording / playback amplifier (2
3), recorded on the tape via the head (24). When the input signal is in the A mode, the PCM digital signal is recorded by the PCM digital signal as independent audio data of the television sound and the independent audio, like the PCM digital audio signal by satellite broadcasting.

Similarly, the internal controller (48) uses the A / D conversion circuit (47a).
When (47b) is selected, the analog signal once demodulated by the PCM decoder (2b) is converted into a digital signal and recorded. The recorded audio signal passes through the recording / reproducing amplifier (23) or (28), the recording / reproducing circuit (21) or (26) regardless of which of PCM, Hi-Fi and linear is selected, and the output terminal (25 ) Or (30) and play.

Next, when extracting only the audio signal from the satellite and supplying it to an external device, the audio mode selection circuit (43) is activated by a command from the input section (33), and either the TV audio or the independent audio is first activated. To be selected. When either is selected,
Either main (for example, Japanese), sub (for example, English), or main + sub (for example, stereo) is selected and output from the output terminal (45).

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).

"Effects of the Invention" Satellite broadcasting has an independent audio signal of two channels in addition to a video signal and a television audio signal of two channels. However, since the present invention is configured as described above, the satellite broadcasting television receiving circuit. When is provided separately,
Whether the satellite broadcast PCM audio signal is a digital signal received by a BS tuner or an analog signal demodulated by a PCM decoder can be selectively recorded and played back, and the PCM signal output from the tuner can be digitally recorded. 1 when converted to the PCM recording signal format with a code converter and recorded
With each PCM recording / reproducing amplifier, all audio programs of the same channel of satellite broadcasting can be recorded as independent audio data as TV audio and independent audio. Further, there is an effect that the condition of the recording reservation can be inputted from the input unit, the contents thereof can be stored and the designated satellite broadcast program can be recorded when the time condition is satisfied.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention, and FIG. 2 is a concrete circuit diagram of a video / audio signal selection circuit. (1) ... Terrestrial broadcast television receiver circuit (BC receiver circuit), (2) ... Satellite broadcast television receiver circuit (BS receiver circuit), (5) ... Magnetic recording and reproducing device for video, (12) ... Audio Magnetic recording / reproducing device for computer, (13) …… System control circuit, (21) …… PCM recording / reproducing circuit.

Claims (1)

[Claims] 1. A terrestrial broadcast television receiving circuit for receiving a terrestrial television broadcast, and a satellite for receiving a video signal and an audio signal from a satellite provided outside a device accommodating the terrestrial broadcast television receiving circuit. A broadcast television receiving circuit, and a video signal selecting circuit for selecting a video signal from the terrestrial broadcasting television receiving circuit and the satellite broadcast television receiving circuit,
A video magnetic recording / reproducing apparatus for 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, and a satellite broadcasting television receiving circuit In order to correspond to the audio program of, a magnetic recording / reproducing apparatus for audio having at least a PCM recording / reproducing circuit, and a system control circuit for controlling the entire apparatus are provided, and the satellite broadcast television receiving circuit receives signals from the satellite. A BS tuner to be received, a PCM decoder for demodulating an audio signal received by this BS tuner into an analog signal, and an audio signal received by the BS tuner is converted into a digital signal for transmission to the PCM recording / reproducing circuit. PCM digital output circuit for receiving, a receiving unit for receiving a control signal from the system control circuit, and a satellite broadcast for decoding the received signal. The PCM recording / reproducing circuit comprises a digital input circuit for inputting a signal from the PCM digital output circuit, and a tuner of the satellite broadcast receiving circuit at the time of satellite broadcast signal recording. And a digital code converter for converting the PCM audio signal input from the digital input circuit into a PCM recording signal format when directly recording without demodulating the PCM audio signal including all the satellite broadcasting audio programs received in , A transmission signal mode demodulation circuit that controls this digital code converter according to the transmission mode, and a PCM decoder that temporarily demodulates the PCM audio signal received by the tuner of the satellite broadcast reception circuit at the time of satellite broadcast signal recording, When recording the demodulated analog signal
The demodulated analog signal of the PCM decoder is input through the audio signal selection circuit, and the A / D conversion circuit that converts this demodulated analog signal into a digital signal and the signals of these digital code converters and the signals of the A / D conversion circuit are input. When the digital code converter is selected, this processor outputs a signal obtained by converting the PCM digital signal from the tuner into a recording format digital signal by the digital code converter to the recording / reproducing amplifier. When the A / D conversion circuit selects, the analog signal once demodulated by the PCM decoder is converted into a digital signal by the A / D conversion circuit and is output to a recording / reproducing amplifier. And the conditions for selecting the receiving station and the broadcast receiving mode of the satellite TV receiving circuit and the CPU for An input unit for instructing the selective output control of the processor, a memory for storing the condition input from the input unit, and a CPU for sending a start signal for reservation recording according to the time condition input from the input unit. The timer reservation circuit to be input to and the input conditions,
A display section for displaying stored conditions and timer reservation contents, controlling the satellite broadcast television receiving circuit to switch to the reserved channel according to the conditions stored in the memory, and selecting the video signal. The circuit and audio signal selection circuit are switched according to the broadcast receiving circuit for recording, and all audio programs of the same channel of satellite broadcasting can be recorded and reproduced by PCM digital signals that can be recorded as independent audio data as TV audio and independent audio. A magnetic recording / reproducing apparatus characterized in that