JPH0819059A - Electronic equipment - Google Patents

Abstract

PURPOSE:To provide the electronic equipment able to display even information related to an electronic device not equipped with an OSD control circuit. CONSTITUTION:A caption 1 is a cable box and a caption 2 is a VCR for reception and channel selection of a CATV signal. Captions 16, 31 are I/O interfaces provided respectively to the box 1 and a VCR 2. The I/O interfaces 16, 31 are connected by an interface bus 6. Information related to the box 1 outputted from a microcomputer 13 of the box 1 (information such as selected channel, pressure of video signal, propriety of release of scrambling, component fault state) is fed to a microcomputer 2 of the VCR 2 via the I/O interface 16, the interface bus 6 and the I/O interface 31. The microcomputer 22 controls an OSD control circuit 26 and displays the information related to the box 1 onto a TV monitor 4. The information related to the box 1 not provided with the OSD control circuit is displayed on the TV monitor 4 and then the state of the box 1 is easily grasped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio / video device (AV device) which is connected to each other.
The present invention relates to an electronic device suitable for application to a V system.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a CATV signal receiving system. In the figure, reference numeral 1 is a cable box for channel selection processing and descrambling processing for CATV signals. The CATV signals of a plurality of channels transmitted by a cable (not shown) are supplied to the tuner 12 via the input terminal 11. In the tuner 12, tuning is performed under the control of the control microcomputer 13, and the tuner 12
Outputs the video signal of the selected channel.
The tuner 12 is provided with a descrambler, and descrambles the scrambled video signal.

Reference numeral 14 is a remote control signal receiving section, and the remote control signal receiving section 14 is supplied with a remote control signal (infrared signal) output from an infrared light emitting section which will be described later. Then, the remote control signal receiving unit 14 controls the control microcomputer 13
Information such as tuning and power on / off is supplied to.

The video signal output from the tuner 12 is supplied to the RF modulator 15 and converted into a broadcast signal of a predetermined channel, for example, 3 channel or 4 channel, and then VCR.
It is supplied to the antenna terminal of the second tuner 21. In the tuner 21, the channel of the broadcast signal output from the RF modulator 15 of the cable box 1 is selected by the control of the control microcomputer 22.

An NTSC video signal output from the tuner 21 is supplied to a recording / reproducing signal processing circuit 23. The operation of the signal processing circuit 23 is controlled by the control microcomputer 22. During recording, the video signal supplied from the tuner 21 is processed by the signal processing circuit 23 to form a recording signal, and the recording signal is recorded on the magnetic tape 25 by the magnetic head 24. During reproduction, the signal reproduced by the magnetic head 24 from the magnetic tape 25 is processed by the signal processing circuit 23 to form a reproduced video signal.
This reproduced video signal is supplied to the on-screen display control circuit (hereinafter referred to as “OSD control circuit”) 26 and R.
It is supplied to the TV monitor 4 via the F modulator 27 to display a reproduction screen.

Reference numeral 28 is a cable box control driver. The control microcomputer 22 controls the driver 28, whereby a predetermined remote control signal is supplied to the cable box 1 from the infrared light emitting section 5, and the VCR 2 side controls power-on / off of the cable box 1 and channel selection operation. A mechanical control microcomputer 29 controls the head drive system, reel drive system, tape running system, and the like.

Reference numeral 30 is a data decoder for caption data (caption data). The video signal output from the tuner 21 is supplied to the decoder 30. Caption data is inserted in a predetermined line of the vertical blanking period of the video signal. As shown in FIG. 3, the caption data includes a clock run-in signal of 7 cycles (503 kHz) and a logic level "1" of 1 bit (S3) after a logic level "0" of 2 bits (S1, S2).
Start bit and 16-bit NRZ data (data code).

The clock run-in signal and the data code are in phase with each other. The 16-bit NRZ data is composed of two combinations of 7-bit ASCII codes b1 to b7 and 1-bit parity code P. HD is a horizontal synchronizing signal and SC is a color burst signal.

When the caption data is multiplexed on a predetermined line of the vertical blanking period of the video signal output from the tuner 21, 16-bit NRZ data is extracted by the decoder 30 and BCD is extracted from the hexacode.
After being decoded into a code, it is supplied to the control microcomputer 22 as subtitle data. In this case, for example, subtitles are displayed on the screen in units of a predetermined frame for each break of a sentence, so that subtitle data is stored in a RAM (not shown) in the microcomputer 22 in units of a predetermined frame.

Then, the caption data is read from the RAM of the control microcomputer 22, supplied to the OSD control circuit 26, and converted into character data (dot data).
The OSD control circuit 26 forms a superimpose signal according to the character data at the timing of the display position on the screen and superimposes it on the video signal supplied from the tuner 21 via the signal processing circuit 23. Thereby, when the caption data is multiplexed in the video signal output from the tuner 21, the subtitle is displayed at a predetermined position on the screen of the television monitor 4.

In addition to the above-mentioned caption display, the control microcomputer 22 controls the OSD control circuit 26 to display character and graphic information related to the operation of the VCR 2 during recording and reproduction. be able to.

[0012]

In the above-described CATV signal receiving system, the cable box 1 does not have the OSD control circuit and cannot display the information related to the cable box 1. It was difficult to grasp. The information related to the cable box 1 includes, for example, channel selection, presence / absence of video signal, presence / absence of audio signal, availability of descramble,
This is information such as the failure status of parts.

Therefore, the present invention provides an electronic device apparatus capable of displaying information related to an electronic device which does not have an OSD control circuit.

[0014]

According to another aspect of the present invention, there is provided an electronic device apparatus in which a plurality of electronic devices are connected via an interface bus, and at least one of the plurality of electronic devices includes an on-screen control means. Information from an electronic device that does not include the on-screen control means is transmitted to and displayed on the electronic device that includes the on-screen control means via the interface bus.

According to a second aspect of the present invention, in the electronic equipment according to the first aspect of the invention, information from the electronic equipment which does not include the on-screen control means is transmitted by being multiplexed with a video signal.

According to a third aspect of the present invention, there is provided an electronic apparatus according to the second aspect, wherein the electronic apparatus having an on-screen control means has a closed caption format data decoding means and an on-screen control means. Information from electronic devices that are not open is to be transmitted in closed caption format data.

In the electronic equipment device according to the fourth aspect of the present invention, the information from the electronic equipment having no on-screen control means is transmitted separately from the video signal.

[0018]

According to the first aspect of the present invention, information from the electronic device not having the on-screen control means is transmitted to the electronic device having the on-screen control means via the interface bus and displayed. Therefore, it becomes possible to easily grasp the state of the electronic device that does not include the on-screen control means.

According to the second aspect of the present invention, the information from the electronic device which is not provided with the on-screen control means is transmitted by being multiplexed with the video signal, so that the number of transmission lines can be reduced.

According to the third aspect of the invention, the electronic device having the on-screen control means has the data decoding means of the closed caption format, and the information from the electronic equipment not having the on-screen control means is the closed caption format. Since it is transmitted as data, it is possible to display information in the same manner as subtitle display.

According to the invention of claim 4, the information from the electronic device which is not provided with the on-screen control means is transmitted separately from the video signal, and the information can be transmitted on the on-screen control means without the video signal. It becomes possible to transmit and display to the electronic equipment provided with.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. This example is an example applied to a CATV signal receiving system. In FIG. 1, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, 16 is an I / O interface provided in the cable box 1. Tuner 12
The video signal output from the I / O interface 16
And the I / O interface 16 is connected to the control microcomputer 13. Also, 31 is a VCR
2 is an I / O interface. The video signal output from the I / O interface 31 is supplied to the signal processing circuit 23 and the data decoder 30, and the I / O interface 31 is connected to the control microcomputer 2
Connected to 2.

Reference numeral 6 is an interface bus. The cable box 1 and the VCR 2 are connected via the interface bus 6. That is, one end and the other end of the interface bus 6 are connected to the I / O interfaces 16 and 31, respectively. The interface bus 6 transmits video signals and other information, as well as control data and the like. For example, the video signal output from the tuner 12 is an I / O interface 16, an interface bus 6,
It is supplied to the signal processing circuit 23 and the data decoder 30 via the I / O interface 31.

Information relating to the cable box 1 output from the control microcomputer 13 of the cable box 1 (for example, channel selection, presence / absence of video signal, presence / absence of audio signal, descramble availability, failure status of parts, etc.) Information) is supplied to the control microcomputer 22 via the I / O interface 16, the interface bus 6, and the I / O interface 31. Further, control data such as power-on / off of the cable box 1 and channel selection operation output from the control microcomputer 22 of the VCR 2 at the time of reserved recording are transmitted via the I / O interface 31, the interface bus 6, and the I / O interface 16. Are supplied to the control microcomputer 13.

Even if not mentioned above, the control microcomputer 2 for the VCR 2
2 can use the interface bus 6 to request the control microcomputer 13 of the cable box 1 to transmit the information related to the cable box 1 described above. Then, when the information relating to the cable box 1 is sent to the control microcomputer 22 in response to the request, the control microcomputer 22 executes the OS.
The D control circuit 26 is controlled so that the information is displayed on the TV monitor 4.
Is displayed in.

As described above, in this example, by transmitting the information regarding the cable box 1 not including the OSD control circuit to the VCR 2 including the OSD control circuit 26 through the interface bus 6, the information is transmitted to the TV monitor 4. Can be displayed, and the state of the cable box 1 can be easily grasped.

In the above embodiment, the information related to the cable box 1 is transmitted separately from the video signal, but it is multiplexed in the vertical blanking portion of the video signal output from the tuner 12, for example. It can also be transmitted. In this case, there is an advantage that the number of transmission lines forming the interface bus 6 can be reduced. However, in this case, if the tuner 12 does not output a video signal, there is a disadvantage that information cannot be transmitted.

When the information related to the cable box 1 is multiplexed and transmitted in the vertical blanking portion of the video signal, the information can also be transmitted by the data of the above-mentioned closed caption format. In that case, the data decoder 30 for the closed caption data of the VCR 2 can be used as it is, and the information can be displayed in the same manner as the subtitle display without changing the VCR 2 side.

In the above embodiment, the present invention is applied to the CATV signal receiving system including the cable box 1 and the VCR 2. However, the present invention is applicable to two or more electronic devices (at least one is OSD control). It is needless to say that the present invention can be similarly applied to an electronic apparatus device in which circuits (having circuits) are connected to each other.

[0031]

According to the invention of claim 1, the information from the electronic device which does not have the on-screen control means is transmitted to the electronic device which has the on-screen control means via the interface bus and is displayed. Therefore, it is possible to easily grasp the state of the electronic device that does not include the on-screen control means.

According to the second aspect of the present invention, the information from the electronic device which is not provided with the on-screen control means is transmitted by being multiplexed with the video signal, so that the number of transmission lines can be reduced.

According to the third aspect of the present invention, the electronic device having the on-screen control means has the data decoding means of the closed caption format, and the information from the electronic equipment not having the on-screen control means is closed caption. Since it is transmitted as format data, information can be displayed in the same way as caption display by using the caption data processing means.

According to the invention of claim 4, the information from the electronic device which is not provided with the on-screen control means is transmitted separately from the video signal, and the information is on-screen controlled even without the video signal. It can be transmitted to an electronic device equipped with the means and displayed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an electronic device apparatus according to the present invention.

FIG. 2 is a block diagram showing a conventional CATV signal receiving system.

FIG. 3 is a diagram for explaining caption data.

[Explanation of symbols]

 1 Cable Box 2 VCR (Video Cassette Recorder) 4 TV Monitor 6 Interface Bus 11 Input Terminal 12 Tuner 13, 22 Control Microcomputer 16, 31 I / O Interface 23 Recording / Playback Signal Processing Circuit 24 Magnetic Head 26 On-Screen Display Control Circuit 30 data decoder

Claims (4)

[Claims] 1. A plurality of electronic devices are connected via an interface bus, at least one of the plurality of electronic devices includes an on-screen control unit, and information from an electronic device not including the on-screen control unit is provided. An electronic device apparatus, wherein the electronic device is transmitted and displayed via the interface bus to an electronic device having the on-screen control means. 2. The electronic device apparatus according to claim 1, wherein the information is transmitted by being multiplexed with a video signal. 3. The electronic device equipped with the on-screen control means has data decoding means in closed caption format, and the information is transmitted as data in closed caption format. Electronic devices. 4. The electronic device apparatus according to claim 1, wherein the information is transmitted separately from the video signal.