JP2800895B2 - Video signal recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording / reproducing apparatus (hereinafter, referred to as VTR) by electrically switching the connection of a television signal when conversion of the television signal is required. The present invention relates to a video signal recording / reproducing apparatus having a circuit that can be connected to a video signal and does not require a mechanical connection change. [Prior Art] Conventionally, when decoding a television signal, a decoder is connected to a television receiver (hereinafter, referred to as TV),
When decoding a VTR television signal, a decoder was connected to the VTR. FIG. 3 and FIG. 4 show how this connection is made. FIG. 3 is a block diagram when a TV and a decoder are connected, and FIG. 4 is a block diagram when a decoder and a VTR are connected. It is. Conventionally, when decoding a TV signal, the TV2 and the decoder 3 are connected by the connection cable 5 as shown in FIG.
a is connected by the RF connection cable 6, and when decoding the VTR signal, as shown in FIG. 4, the VTR 1a is connected to the decoder 3 connection cable 4, and the VTR 1a and the TV 2 are connected by the RF connection cable 6. doing. Normally, in the case of a VTR capable of receiving a television signal, recording on a channel different from the channel being received on the TV becomes possible. At this time, the connection of the decoder is made such that the connection shown in FIG. 3 is made when the television signal receives a channel which needs to be decoded by the TV, and the connection shown in FIG. 4 when the signal is received by the VTR. Must be changed. [Problems to be Solved by the Invention] Since the conventional VTR is configured as described above, the connection of the decoder 3 must be changed depending on the channel to be received, which is very complicated. The present invention has been made in order to solve such a problem, and the decoder connected to the VTR is electrically connected to the TV or the decoder by operating the changeover switch of the VTR while the decoder is connected to the VTR. It is an object of the present invention to obtain a video signal recording / reproducing apparatus which can switch between a VTR and a decoder. [Means for Solving the Problems] A video signal recording / reproducing apparatus according to the present invention includes a tuner for receiving a television signal (TV signal) and a scrambled television signal received by the tuner. 3) a first output section (terminal 81) for outputting to a third input section and a first input section (terminal 82) for inputting a descrambled signal from a decoder device, and recording for recording and reproducing the signal; Reproduction means (VTR1a)
And a second output section (terminal 61) for outputting a signal to be recorded / reproduced by the recording / reproducing means, and a first output section (terminal 51) for outputting a scrambled television signal to a decoder device. And a first input section (terminal 52) for inputting a signal descrambled by the decoder device and a second input section (terminal 53) for inputting a signal output from the second output section (terminal 61). Display device with TV (TV2)
And a scrambled television signal from a first output unit (terminal 51) of the display device or a first output unit (terminal 81) of the recording / reproducing means. A third output unit (terminal 41) for outputting to the decoder device, a second input unit (terminal 42) for inputting the signal descrambled by the decoder device, and a first output unit (terminal 51) of the display device. The scrambled television signal to be output is supplied to the decoder device, and the signal descrambled by the decoder device is set to be supplied to the first input section (terminal 52) of the display device. Alternatively, a scrambled television signal output from a first output section (terminal 81) of the recording / reproducing means is supplied to the decoder device, and the decoder device outputs the scrambled television signal. The tumble signal is characterized in that a changeover switch (7A, 7B) to set the state for supplying to a first input of said recording and reproducing means (pin 82). [Operation] A television signal from a display device is descrambled by a decoder device and output to the display device without changing a cable, or a television signal received by a tuner provided with recording / reproducing means is decoded. Whether to descramble the data by the device and supply it to the re-recording / reproducing means can be selected by a changeover switch. Thus, it is possible to share the decoder device in the above two states without changing the cable. Hereinafter, an embodiment of a video signal recording / reproducing apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a connection relationship between a VTR, a TV, and a device for decoding or encoding (hereinafter, referred to as a decoder) in one embodiment, and FIG. 2 is a connection diagram showing a connection relationship between the signals. In FIGS. 1 and 2, the same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals. First, in FIG. 1, the VTR 1 and the TV 2 are connected by a connection cable 5 and also by an RF connection cable 6 connected by a high-frequency television signal. The VTR 1 and the decoder 3 are connected by a connection cable 4. In the present invention, VTR1, TV2 and decoder 3 are the first
If connected as shown in the figure, the TV2 can receive the decoded signal, and the VTR1 can also receive the decoded signal. Next, FIG. 2 shows a more detailed signal flow of the present invention. In FIG. 2, 4a is a decoder input signal cable, 4b is a decoder output signal cable,
And the changeover switches 7A and 7B are connected to the movable terminals 7A1 and 7B1, respectively. The changeover switches 7A and 7B are provided in the VTR 1, and have movable terminals 7A1 and 7B1 and two fixed terminals 7A2, 7A3, 7B2 and 7B3, respectively. The fixed terminal 7A2 of the changeover switch 7A is connected to the TV2 via the TV output signal cable 5a.
The fixed terminal 7B2 and TV2 are connected via a TV input signal cable 5b. Also, the conventional VTR 1a and the fixed terminal 7A3 of the changeover switch 7A are connected via a decoder input signal cable 8a,
The fixed terminal 7B3 of the changeover switch 7B and the VTR 1a are connected via a decoder output signal cable 8b. An output signal from the TV 2 is sent to the TV output signal cable 5a, and an input signal to the TV 2 is sent to the TV input signal cable 5b. The decoder input signal cable 8a receives a decoder input signal from the VTR 1a to the decoder, and the decoder output signal cable 8b sends a decoder output signal from the decoder 3 to the VTR 1a. The state where the movable terminals 7A1 and 7B1 of the changeover switches 7A and 7B of FIG. 2 are connected to the fixed terminals 7A2 and 7B2, respectively, that is, the state shown in the drawing shows the state where the TV 2 and the decoder 3 are connected. . At this time, the signal to be decoded from TV2, that is, the TV output signal is the TV output signal cable 5a, the changeover switch.
Decoder 3 via 7A and decoder input signal cable 4a
Is input to The TV output signal input to the decoder 3 is
And is input to the TV 2 via the decode output signal cable 4b, the changeover switch 7B, and the TV input signal cable 5b. Next, when the VTR1 (VTR1a) and the decoder 3 are connected, the movable terminals 7A1 and 7B1 of the changeover switches 7A and 7B are switched to the fixed terminals 7A3 and 7B3, respectively, that is, the broken lines in the drawing. As a result, the tuner output signal of the VTR 1a is input to the decoder 3 via the data input signal cable 8a, the changeover switch 7A, and the decoder input signal cable 4a, and is decoded by the decoder 3. This decoded signal is the decoder output signal cable
4b, a changeover switch 7B, and a decoder output signal cable 8b, which are input to the VTR 1a. In this way, by connecting the changeover switches 7A and 7B as shown in FIG. 2, the connection of the decoder 3 can be changed electrically while the decoder 3 is still connected to the VTR 1. The complexity of changing each time can be solved. The video signal recording / reproducing apparatus of the present invention will be described in more detail with reference to FIG. First, the VTR1 as the video signal recording / reproducing device of the present invention
The TV 2 as a display device connected to the first and second terminals includes a first output terminal 51 for outputting a scrambled TV signal to the decoder 3 and a first input terminal 52 for inputting a signal descrambled by the decoder 3. A second input terminal for inputting a signal output from a second output terminal 61 of a VTR 1 described later.
53 and. The VT as the video signal recording / reproducing device of the present invention
R1 is a tuner for receiving a TV signal, a first output terminal 81 for outputting the scrambled TV signal received by the tuner to the decoder 3, and a descrambled signal from the decoder 3. First input terminal 82
A VTR 1a as a recording / reproducing means for recording / reproducing a signal, a second output terminal 61 for outputting a signal recorded / reproduced by the VTR 1a to a second input terminal 53 of the TV2, and a first output terminal of the TV2.
A third output terminal for outputting the scrambled TV signal from the output terminal 51 or the first output terminal 81 of the VTR 1a to the decoder 3.
An output terminal 41, a second input terminal 42 for inputting a signal descrambled by the decoder 3, and changeover switches 7A and 7B are provided. The changeover switches 7A and 7B connect the scrambled TV signal output from the first output terminal 51 of the TV2 to the decoder 3.
To provide a signal descrambled by the decoder 3 to the first input terminal 52 of the TV 2 or a scrambled TV signal output from the first output terminal 81 of the VTR 1a. Is supplied to the decoder 3, and the signal descrambled by the decoder 3 is supplied to the VTR1.
This is set to a state where it is supplied to the first input terminal 82 of a. Therefore, the scrambled TV signal from the TV2 is descrambled by the decoder 3 by operating the change-over switches 7A and 7B without changing the cable.
Output to VTR1a
Scrambled received by the built-in tuner
It is also possible to set a state in which the TV signal is descrambled by the decoder 3 and supplied to the VTR 1a. In other words, it is possible to set the above two states simply by operating the changeover switches 7A and 7B without changing the cables, and it is possible to share the decoder 3 in the two states. For example, a VTR 1 with a built-in BS tuner, a TV 2 with a built-in BS tuner, and a descramble decoder 3 for descrambling the BS scramble (= encryption) of the BS broadcast are interconnected by cables 4 and
Changeover switch 7 provided on VTR1 when connected with 5,6
By operating A and 7B on the TV side, the scrambled B received by the TV2 is shared by one TV3.
It can descramble the S channel TV signal and supply the descrambled output signal to the TV2 independently of the VTR1, and display the BS broadcast image on the TV2. , 7B to the VTR side, descrambles the scrambled BS channel TV signal received by the VTR1a built-in tuner,
Independently of TV2, the descrambled output signal can be supplied to VTR1a. In the above embodiment, the method of switching the changeover switches 7A and 7B is not specified, but this switching method is a mechanical or electrical switching method, and does not lose the generality of the present invention. In addition, the switching signal causes TV2
The same applies to the case where a function of switching the input / output of the VTR 1 is added. [Effects of the Invention] As described above, according to the present invention, there is no need to change the cable from the decoder device regardless of the receiving mode of the television signal. The scrambled television signal can be descrambled by a decoder device and output to a display device, or the scrambled television signal received by a tuner provided with recording / reproducing means can be decoded. An easy-to-use video signal recording / reproducing apparatus which can be set to a state where it is descrambled by the apparatus and supplied to the recording / reproducing means can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a connection relationship between a VTR, a TV and a decoder in a video signal recording / reproducing apparatus according to an embodiment of the present invention, and FIG. Connection diagram showing the connection relationship of the signal path between the VTR and
FIG. 4 is a block diagram showing a connection relationship between a TV and a decoder, and a TV and a VTR in a conventional video signal recording / reproducing device. FIG. 4 is a connection diagram showing a connection relationship when decoding a VTR signal in the conventional video signal recording / reproducing device. FIG. 1,1a VTR, 2 TV, 3 decoder, 4a decoder input signal cable, 4b decoder output signal cable, 5a TV output signal cable, 5b TV input signal cable, 7A , 7B ... changeover switch, 8a ... decoder input signal cable, 8b ... decoder output signal cable. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] A tuner for receiving a television signal, a first output unit for outputting a scrambled television signal received by the tuner to a decoder device, and a first output unit for inputting a descrambled signal from the decoder device Recording / reproducing means for recording / reproducing a signal, and a second output unit for outputting a signal recorded / reproduced by the recording / reproducing means, wherein the scrambled television signal is supplied to a decoder device. A first output section for outputting a signal, a first input section for inputting a signal descrambled by the decoder device, and a second input section for inputting a signal output from the second output section. What is claimed is: 1. A video signal recording / reproducing device connected to a display device, wherein a scramble from a first output portion of the display device or a first output portion of the recording / reproducing means is provided. A third output unit for outputting a decoded television signal to the decoder device; a second input unit for inputting a signal descrambled by the decoder device; and a scramble output from a first output unit of the display device. To the decoder device, and set the signal descrambled by the decoder device to be supplied to the first input unit of the display device. (1) A scrambled television signal output from one output unit is supplied to the decoder device, and a signal descrambled by the decoder device is set to be supplied to a first input unit of the recording / reproducing means. A video signal recording / reproducing device comprising a switch.