JP2834972B2 - Dubbing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dubbing control device, and more particularly to a dubbing control device for dubbing a signal from a transmitting device having a digital audio interface output at a receiving device.

[0002]

2. Description of the Related Art In recent years, DAT players, CD players,
Digital playback devices such as MD players and DCC players have been widely put into practical use, and accordingly, it has become necessary to limit dubbing from these digital playback devices to a recording device on the receiving side. Therefore, a digital audio interface (DAI) compliant with the SCMCC (Serial Copy Management System) standard is provided, and the category code and digital copy bit in the channel status included in the output signal (DAT-TX signal) from the DAI are set. It controls dubbing (recording) permission and prohibition copy by adjusting.

[0003] Even in a dubbing permission state, a dubbing operation is the same as a normal recording operation operation.
It has been performed through complicated operation procedures such as controlling the operations of the T-sending device and the receiving-side recording device.

[0004]

As described above, the dubbing control from the transmitting device having the conventional DAI to the receiving device must be performed by the user while monitoring the reproduced sound, and the operation is complicated. Met. Further, when the reproduced sound is insignificant information, for example, when the transmitting side (reproducing side) device is in a stop state or in a search state, the reproduced sound is insignificant information.
If dubbing is permitted, dubbing is performed directly on the receiving (recording) device, and there is a problem that efficient dubbing cannot be performed.

It is an object of the present invention to provide a dubbing control device which does not require a complicated operation and can efficiently dub only significant information.

[0006]

In order to solve the above-mentioned problems, a dubbing control apparatus according to the present invention adds and sets a category code and a digital copy bit to a reproduction signal via a digital audio interface unit and sets the duplication control signal on a receiving side. In a dubbing control device for permitting / prohibiting recording of a device, the category code and the digital copy bit are set to prohibit the recording when the reproduction signal is not significant information. Also, a timer for setting an arbitrary time is provided, and the recording of the category code and the digital copy bit is permitted until the set time elapses, and the recording is prohibited after the set time elapses. It can be set as follows. At this time, the timer operation of the timer can be stopped when the reproduction signal is not significant information.

[0007]

According to the present invention, when insignificant information is output, such as when there is no audio data or when an output signal during a special operation other than a reproducing operation such as a search is being output from a reproducing system, the DAI is output. A category code and a digital copy bit are added and set in the signal via the digital audio interface unit to prohibit recording by the receiving device. In addition, a timer is provided in the reproduction system, and a desired time length of the significant information signal can be recorded by setting an arbitrary time length determined by the user.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of a dubbing control device according to the present invention. In the present embodiment, a case where a DAT is used as the DAI transmitting side device 100 is described. In the transmission side device (DAT) 100, the RF signal read from the tape 1 via the magnetic head of the magnetic drum 2 is amplified by the RF amplifier 3 and sent to the signal processing unit 7. The signal processing unit 7 receives the signal from the RF amplifier 3, performs demodulation processing, de-increving processing, error correction processing, and the like, obtains a reproduced digital signal, and outputs the reproduced digital signal to the analog signal processing unit 8 and the DAI unit 9. The analog signal processing unit 8 converts the reproduced digital signal from the signal processing unit 7 into an analog signal, performs necessary predetermined analog signal processing, and supplies the analog output signal to the analog output terminal LINE OUT.

The DAI unit 9 modulates the reproduced digital signal from the signal processing unit 7 in accordance with a predetermined known DAI format, and converts the DAT output as a DAI signal via the output terminal TX to the digital device as the receiving device 200. It is supplied to the input terminal RX of the recording device. The receiving device 200
The DAI signal received from the receiving terminal RX is demodulated and recorded on a predetermined recording medium. The servo unit 6 includes a drum motor 4 for rotating the drum 2 under the control of the system controller 10 via the signal processing unit 7 and a motor 5 for rotating the capstan and the reel.

The system controller 10 controls the DAT operation. The system controller 10 controls the operation of the DAT based on operation instruction information from the key 12, displays the operation state on the display unit 11, and controls the operation as described below. I do. The transmitting device 100 is connected to an external analog input terminal LINE during a recording operation.
It has an IN and a digital input terminal RX, and performs a recording operation reverse to the above.

In the above configuration, considering the digital dubbing operation from the DAI-TX transmitting device 100 to the DAI-RX receiving device 200, if the reproduced signal from the RF amplifier 3 is significant information, the DAI unit 9 At
The state of the combination of the category code and the digital copy bit in the channel status included in the DAI signal is set to a state where digital recording is permitted (in this case, the category code is "DAT-P" and the digital copy bit is "prohibited"). The setting is made to enable recording on the receiving device 200. Here, whether or not the information is significant information is determined by the system controller 1.
0.

Also, the transmitting device 100 is reproducing non-significant information (for example, "00" data reproduction in a silent state).
Or, when a special operation other than the reproduction operation is being performed, for example, during a search operation, the category code and digital copy bit in the channel status included in the DAI signal are set in order to inhibit the recording operation of the receiving device 200. Is set to a state where digital recording is prohibited (for example, the category code is “DAT” and the digital copy bit is “prohibited”). Upon receiving this signal, the receiving device 200
Usually, a recording waiting period (REC PAUSE) state is set.

By performing such recording permission / prohibition control depending on whether the reproduction information is significant or not, the receiving device 200 excludes the recording of non-significant information and enables efficient dubbing of only significant information. .

When the user wants to record on the receiving device 200 for a predetermined time length, the user sets the time in the timer 13 of the transmitting device 100,
The above operation may be performed through the control of the system controller 10. In this case, the timer operation of the timer 13 is interrupted during reproduction of insignificant information or during a special operation other than reproduction such as a search operation.

[0015]

As described above, in the dubbing control device according to the present invention, insignificant information (output signal at the time of absence of audio data or at the time of special operation other than reproduction operation such as search) is output from the reproduction system. When you are, DA
Information for instructing recording prohibition is inserted into the I signal to prohibit the recording operation of the receiving device. In addition, a timer is provided in the reproduction system, and the desired time length of the significant information signal can be recorded by setting an arbitrary time length determined by the user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a dubbing control device according to the present invention, and shows an example in which a reproduction signal from a DAT is digitally recorded by a receiving device.

[Explanation of symbols]

Reference Signs List 1 tape 2 drum 3 RP amplifier 4 drum motor 5 capstan / reel motor 6 servo unit 7 signal processing unit 8 analog signal processing unit 9 DAI
Unit 10 system controller 11 display unit 12 key unit 13 timer 100 DAI transmitting device 200 DAI
Receiver device

Claims (3)

(57) [Claims] 1. A dubbing control device for adding and setting a category code and a digital copy bit to a reproduction signal through a digital audio interface unit to permit or prohibit recording of a receiving device, wherein the reproduction signal has significant information. If not, the dubbing control device sets the category code and digital copy bit so as to prohibit the recording. 2. A timer for setting an arbitrary time in a dubbing control device for adding and setting a category code and a digital copy bit to a reproduced signal via a digital audio interface unit to permit / prohibit recording of a receiving device. And setting the category code and the digital copy bit to be in the recording enabled state until the set time elapses, and setting the recording to be in the prohibited state after the set time elapses. Features a dubbing control device. 3. The dubbing control device according to claim 2, wherein the timer operation of the timer is stopped when the reproduction signal is not significant information.