JPH0685595B2 - Control code transmission method - Google Patents

Description

The present invention relates to a method of transmitting a control code in a remote control transmitter such as a CATV converter.

(B) Conventional technology Fig. 2 shows a schematic block diagram of a CATV broadcast receiving system.
(1) is a CATV converter, (2) is a television receiver, (3) is an FM stereo receiver, and (4) and (4) are speakers. In this system, video signals and audio signals for a plurality of TV channels and audio signals for a plurality of radio channels are transmitted via the cable (5). Then, in TV reception mode, the CATV converter (1) is used to
The FM stereo receiver (3) receives the TV channel video signal, the TV channel audio signal is received by the FM stereo receiver (3), the CATV converter is stopped in the FM radio reception mode, and the FM stereo receiver (3) performs FM. Receives audio signals from radio channels.

Normally, the CATV converter (1) in the above system and
The FM stereo receiver (3) is controlled by the remote control transmitter (6), respectively.

This remote control transmitter can be improved in operability by making it common to a plurality of controlled devices as disclosed in Japanese Patent Laid-Open No. 58-97967.

On the other hand, in the system shown in FIG. 2, in the TV reception mode, for example, the CATV converter (1) using the same channel key
And FM stereo receiver (3) both need to be controlled simultaneously. FIG. 3 is a table showing the control codes for the CATV converter and FM stereo receiver corresponding to each channel key in the TV reception mode. The method of transmitting the control code will be described below.

Fig. 4 is a diagram showing a method of transmitting a control code when receiving a "12" channel. First, when the channel keys "1" and "2" of the remote control transmitter are pressed in sequence, the CATV converter for "1" is Control code (A1) for 3 times, same control code (A2) for “2” 3 times, then FM for “1”
The control code (B1) for the stereo receiver is transmitted three times, and the control code (B2) for "2" is transmitted three times. The same code is transmitted three times for the purpose of preventing malfunction.

In the above transmission method, the control code can be transmitted only after the operator has pressed both the "1" and "2" keys. Therefore, when the "1" key is pressed, the "" is displayed on the channel indicator. There is a drawback that the operation of displaying "1" and then pressing the key of "2" cannot display "12", and it takes time from pressing the key to displaying it and the operator feels uneasy. there were.

As a transmission method for eliminating the above-mentioned drawbacks, as shown in FIG. 5, after transmitting (A1) and (B1) three times each, (A2) and (B2) are transmitted.
It is conceivable to send a message every three times. However,
In this method, regarding the control code (A1), as a result of pressing the "1" key once, whether it was sent multiple times as a countermeasure against malfunction or was the "1" key pressed intermittently more than once (that is, " It has a drawback that it is difficult to distinguish whether "11" was selected.

(C) Problems to be Solved by the Invention The present invention has been made in view of the above-described points, and when operating a two-digit channel, the upper digit channel key is supported before the lower digit channel key is pressed. The present invention provides a method of transmitting a control code that can be displayed and that does not cause a malfunction.

(D) Means for Solving the Problems In the present invention, each of the first to fourth control codes is sequentially transmitted in a time-division manner as a control code group that is continuously repeated a plurality of times.

(E) Operation The control code representing the upper digit is transmitted by the above-mentioned means until the operation of both the two-digit channel keys is completed.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a method of transmitting a control code in the present embodiment. The control code for the CATV converter and the FM stereo receiver is the same as that in FIG. 3 and the "12" channel is received as in the conventional example. This is the case.

First, when the "1" key on the remote control transmitter is pressed, the control code (A1) is continuously transmitted multiple times. A unit of transmission composed of several consecutive control codes is called a packet (control code group). The packet (PA1) composed of the control code (A1) is followed by the control code (B
The packet (PB1) composed of 1) is transmitted. As a result, "1" is input to the CATV converter and the FM stereo receiver as the upper digit of the channel, and "1" is displayed on the channel display.

Next, when the "2" key is pressed, the packet (PA2) composed of the control code (A2) is transmitted, and then the packet (PB2) composed of the control code (B2) is transmitted.

As a result, "2" is entered as the lower digit of the channel, "12" is displayed on the channel indicator, and CATV
"12" channel is received.

(G) Effect of the Invention As described above, according to the present invention, when a two-digit channel is received in a remote control transmitter that controls a plurality of controlled devices, the upper digit of the lower digit is pressed before the lower digit channel key is pressed. The display corresponding to the channel key is possible, and the operator can immediately confirm the number corresponding to the pressed key.

Also, since each control code is transmitted as a packet in a time-division manner, it is easy to distinguish whether the same control code is transmitted multiple times or intermittently more than once as a result of pressing the channel key once. It is possible to prevent malfunction.

[Brief description of drawings]

FIG. 1 is a diagram showing a control code transmitting method in an embodiment of the present invention, FIG. 2 is a schematic block diagram of a CATV broadcast receiving system, and FIG. 3 is a control code table in a TV receiving mode. 4 and 5 are diagrams showing different conventional control code transmission methods, respectively. (1) …… CATV converter, (3) …… FM stereo receiver, (6) …… remote control transmitter

Claims (1)

[Claims] 1. A remote control transmitter for controlling the reception channels of a plurality of controlled devices transmits different control codes to each of the plurality of controlled devices by a single key operation, and at least two key operations are performed to obtain a single control code. In a method of transmitting a control code capable of performing an operation, a first control code indicating first control data of the single operation to a first controlled device and a first control code to a second controlled device. Transmitting a second control code indicating control data by a first key operation, a third control code indicating control data subsequent to the single operation to the first controlled device, and the second control code And a fourth control code indicating the next control data to the controlled device by the following key operation. Each control code is sequentially repeated as a control code group that is repeated a plurality of times. Method for transmitting control code and transmits the split.