JPH05292417A - Tuning control method for tuner - Google Patents

Abstract

PURPOSE:To directly and easily control the tuning of a tuner by a personal computer at low cost without necessity for any special arrangement on a software on the side a microcomputer at a video equipment. CONSTITUTION:This method is provided with a printer output port 22 loading an IC to output parallel data composed of bits more than bits constituting a tuning control signal outputted from a microcomputer 10, the printer output port 22 is connected through PLL control signal lines 28 and 16 to a tuner 14 by using a personal computer 20 which can control these parallel data with a personal computer language, and the tuning control signal is outputted from the printer output port 22 through the PLL control signal lines 28 and 16 to the tuner 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning control method of a tuner in a video device in which the tuning of a tuner is controlled by a microcomputer, and more particularly to a method of controlling the tuning by a personal computer.

[0002]

2. Description of the Related Art As will be described with reference to FIG. 3, a television antenna 4 is used to tune a television receiver 2 whose tuner can be tuned by an infrared remote controller.
In order to select a TV radio wave of a channel of a desired broadcast program from a large number of TV radio waves received from each TV broadcasting station, a plurality of TV stations corresponding to each broadcasting station attached to this TV receiver 2 are selected. Channel tuning operation button 6
, Press the channel selection operation button corresponding to that selection, or select the channel selection operation button corresponding to the selection from the plurality of channel selection operation buttons attached to the infrared remote controller 8 for each broadcasting station. Press When the channel selection operation button 6 attached to the television receiver 2 is pressed, a channel selection command signal is given to the microcomputer 10 from the channel selection operation button 6 and a channel attached to the infrared remote controller 8 When the tuning operation button is pressed, the channel selection command signal output in the form of an optical signal from the infrared emission section of the infrared remote controller 8 corresponding thereto is supplied to the remote control signal input section 12 attached to the television receiver 2. Then, once converted into the form of an electric signal, a channel selection command signal is given from the remote control signal input unit 12 to the microcomputer 10.

The tuner 14 is three PLLs as shown in the figure.
From the microcomputer 10 connected via the control signal line 16, a tuning control signal of parallel data consisting of a plurality of bits corresponding to a given tuning command signal is input to the tuner 14. As is well known, the tuner 14 selects a television radio wave of a desired broadcast program in response to the input of the channel selection control signal, converts the television radio wave into an intermediate frequency signal, and outputs the video and audio in the subsequent stage. Output to the intermediate frequency stage circuit 18 of FIG. 1 and, by this, the television screen of the selected broadcast program is displayed on the television screen through the processing of other circuits not shown.

[0004]

In such a channel selection method in the television receiver 2, since the hardware and software are configured to have the above-described functions, the television receiver 2 is selected. The reception channel is selected by operating the channel selection operation button 6 attached to the receiver 2 itself, or the reception channel is selected by operating the channel selection operation button attached to the infrared remote controller 8. Even if it is possible, the personal computer can use the interface board inserted in the expansion interface of the personal computer or the RS-232C terminal of the personal computer to perform the tuning operation of the receiving channel. Conceivable.

However, since the expansion interface is provided by the personal computer because there is no room in outputting data for tuning the tuner 14 of the television receiver 2, a special interface is specified as an expansion type interface. Is required, which is expensive in terms of price. Moreover, since the RS-232C terminal transmits data for channel selection to the television receiver side 2 serially, the microcomputer 10 uses the serial selection. Tuner 14 after converting station data into parallel
Since it was necessary to output the data to the computer, special consideration in software on the side of the microcomputer 10 is required.

Therefore, in the present invention, the cost is not expensive, and no special consideration is required in software on the microcomputer side of the video equipment, and the tuner can be selected directly and easily by the personal computer. The purpose is to be able to control the station.

[0007]

In order to achieve such an object, in a tuner tuning control method according to a first aspect of the present invention, a tuning channel composed of a plurality of bits of parallel data from a microcomputer. In a method of controlling a tuner of a tuner of a PLL frequency synthesizer system by outputting a control signal in parallel via a PLL control signal line to a tuner of a video equipment for controlling the tuner of the tuner, A printer output port equipped with an IC for outputting parallel data having a number of bits larger than the number of bits constituting the tuning control signal output from the microcomputer is provided, and the parallel data is provided in a personal computer language. A controllable personal computer is used, and its printer output port is A tuning control signal similar to the tuning control signal given to the tuner from the microcomputer by operating the personal computer through this connection is connected to the PLL control signal line, and the configured tuning control signal is generated. PL from the printer output port
It is characterized in that the tuning of the tuner is controlled directly from the personal computer by outputting it to the L control signal line.

In the tuner tuning control method according to the second aspect of the present invention, the tuning control signal composed of parallel data of a plurality of bits is sent from the microcomputer to the PLL.
A method for controlling a tuner of a personal computer for a video device which outputs the signal to a tuner of a PLL frequency synthesizer system in parallel via a control signal line to control the tuner selection. An output port is connected to the microcomputer, a printer output port is made to output a tuning command signal to the microcomputer through this connection, and the tuner is responsive to the tuning command signal from the personal computer. It is characterized in that it outputs a tuning control signal for selecting the.

[0009]

According to the present invention, a printer output port equipped with an IC for outputting parallel data having a number of bits larger than the number of bits constituting the tuning control signal output from the microcomputer is provided, and , A parallel computer that can control this parallel data in a personal computer language is used, so there is enough data for outputting a tuning control signal, that is, without using a special interface such as an expansion interface, The tuner selection can be controlled by outputting the data to the PLL control signal line via the printer output port by the operation of the personal computer without the need of processing for converting the data from serial to parallel.

According to a second aspect of the present invention, the printer output port of the personal computer is connected to the microcomputer. Through this connection, the printer output port causes the microcomputer to output a tuning command signal, and the microcomputer outputs the channel selection command signal. Since a tuning control signal for tuning the tuner is output in response to the tuning command signal from the personal computer, the tuning command signal for controlling the tuning of the tuner is output by the personal computer, or, It is possible to control other operations in the video device, such as channel display and other controls.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram schematically showing main parts of a television receiver as a video device and a personal computer to which the tuning control method according to the embodiment of the present invention is applied. The portions corresponding to those of the conventional example are denoted by the same reference numerals, and detailed description of the portions having the same reference numerals is omitted.

In the television receiver 2 to which this embodiment is applied, as in the conventional television receiver shown in FIG.
P for the tuning control signal composed of bit parallel data
It is assumed that the channel selection of the tuner 14 is controlled by outputting in parallel to the tuner 14 of the PLL frequency synthesizer system via the LL control signal line 16.

The channel selection method of the embodiment will be described below. First, as the personal computer 20, an IC that outputs parallel data having a number of bits larger than the number of bits forming the channel selection control signal output from the microcomputer 10. Equipped with a printer output port 22 equipped with
In addition, the parallel data that can be controlled by a personal computer language is used. The printer output port 22 may be any one that outputs according to the specifications of Centronics, and a dedicated data output IC conforming to these specifications can directly output, for example, 8-bit parallel data in a personal computer language. Can be controlled. Then, such a printer output port is connected to the connector-equipped cable 24 to the connector 26 of the television receiver 2, and the PLL control signal line 28 from the tuner 14 is connected to this connector 26. Then, a keyboard control operation of the personal computer 20 through these connections generates a tuning control signal similar to the tuning control signal given to the tuner 14 from the microcomputer 10, and the generated tuning control signal is generated by the printer. Output from the output port 22 to the PLL control signal lines 28 and 16. As a result, the tuning of the tuner 14 can be controlled directly from the personal computer 22.

Therefore, according to this embodiment, the tuning operation of the tuner 14 is performed not only by the tuning control signal from the microcomputer 10 in the television receiver 2 but also by the personal computer 20 which is an external device. It can also be done by a control signal.

The PLL control signal lines 16 and 28 are composed of three lines, and a CE signal (enable signal) which is active high during control of the tuning operation is given to the first control signal line. The second control signal line is supplied with a clock signal for controlling the basic timing of the channel selection operation, and the third control signal line is supplied with a data signal regarding channel selection. Such signals are transmitted to the microcomputer 1 in the television receiver 2.
It is generated by the personal computer 20 outside the television receiver 2. Then, the microcomputer 1 in the television receiver 2
The generation at 0 is performed in accordance with the above-described signal generation programs that have been determined from the beginning.
The external personal computer 20 may be programmed in accordance with the program corresponding to the microcomputer 10 and output to the television receiver 2. The PLL control signal lines 16 and 28 are composed of two lines in Europe and the like.

In the above-described tuning method, the tuning control signal is directly output from the printer output port 22 of the personal computer 20 to the PLL control signal lines 28 and 16, but as shown in FIG. Is connected to the microcomputer 10 via the connector 26 and the connection line 30 of the television receiver 2, and a tuning command signal is output from the printer output port 22 to the microcomputer 10 to perform tuning control. You can In such a connection, the tuner 14 of the television receiver 2 is operated by the personal computer 20.
It is possible to output to the microcomputer 10 data for controlling not only the channel selection control but also the display of the channel sign of the television receiver 2 and other controls.

[0018]

As described above, according to claim 1 of the present invention, an IC for outputting parallel data having a number of bits larger than the number of bits constituting the tuning control signal output from the microcomputer is mounted. A personal computer equipped with a printer output port and capable of controlling this parallel data in a personal computer language is used, and the data of the tuning control signal is output in parallel from the printer output port to the PLL control signal line. Therefore, it is not necessary to use data for outputting the tuning control signal with a margin, that is, it is not necessary to use a special interface such as an expansion interface, which is advantageous in terms of cost, and data can be converted from serial to parallel. Since no conversion processing is required, Consideration of software processing for the station control is also unnecessary.

According to a second aspect of the present invention, the printer output port of the personal computer is connected to the microcomputer, and the printer output port causes the microcomputer to output a tuning command signal through the connection. Since the microcomputer outputs the tuning control signal for tuning the tuner in response to the tuning command signal from the personal computer,
Not only the tuning command can be output by the personal computer to control the tuning of the tuner, but also the tuning can be controlled, and it is also possible to control other operations in the video device, such as channel display and other controls. Becomes

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing main parts of a television receiver and a personal computer to which a method according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram schematically showing main parts of a television receiver and a personal computer to which a method of another embodiment of the present invention is applied.

FIG. 3 is a block diagram schematically showing a main part of a television receiver according to a conventional example method.

[Explanation of symbols]

 2 Television receiver 10 Microcomputer 14 Tuner 16, 28 PLL control signal line 20 Personal computer 22 Printer output port 26 External connector

Claims (2)

[Claims] 1. A video for outputting a tuning control signal composed of parallel data of a plurality of bits from a microcomputer to a tuner of a PLL frequency synthesizer system in parallel through a PLL control signal line to control tuning of the tuner. A method of controlling tuning of the tuner mounted on a device, comprising: mounting an IC for outputting parallel data having a number of bits larger than the number of bits forming a tuning control signal output from the microcomputer. A personal computer equipped with a printer output port and capable of controlling this parallel data in a personal computer language is used. The printer output port is connected to the PLL control signal line, and the personal computer is connected via this connection. The operation of the micro A tuning control signal similar to the tuning control signal given from the computer to the tuner is configured, and the tuning control signal thus configured is output to the PLL control signal line from the printer output port to directly personalize the tuner tuning. A tuner tuning control method characterized by being controlled from a computer. 2. A video for outputting a tuning control signal composed of a plurality of bits of parallel data from a microcomputer in parallel to a tuner of a PLL frequency synthesizer system via a PLL control signal line to control tuning of the tuner. In a method of controlling tuning of the tuner installed in a device, a printer output port of a personal computer is connected to the microcomputer, and a command from the printer output port to the microcomputer is issued from this connection. A tuner tuning control method, wherein a signal is output, and a tuning control signal for tuning the tuner is output from the microcomputer in response to a tuning command signal from the personal computer.