JPH04133574A - Remote control transmitter - Google Patents

Abstract

PURPOSE:To provide viewers with a comfortable TV watching environment which is free from sounds and noise by providing a means which erases the sound output of a TV receiver through one time of key operation which is made when the CATV telecasting signal receiving state of the TV receiver is switched. CONSTITUTION:When a channel number key of a remote control transmitter 6 is pressed in order to switch the channel of CATV telecasting, the transmitter 6 first transmits a TV sound erasure controlling signal for erasing the sound of a TV receiver 2. As a result, the sound output of the receiver 2 is discontinued. Under such condition, the transmitter 6 transmits a channel switching controlling signal for controlling the channel switching of a CATV converter 1. Upon receiving the signal, the converter 1 executes channel selecting operations. Finally, the transmitter 6 transmits a TV sound erasure controlling signal for restoring the sound output of the receiver 2 after spending time for sufficiently stabilizing the output frequency of the converter 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a remote control transmitter (hereinafter referred to as a remote control transmitter), and in particular is capable of simultaneously controlling a CATV (cable television) converter and a television receiver. related to remote control transmitters.

[Conventional technology]

When viewing CATV television broadcast signals, a CATV converter 1 is required in addition to the television receiver 2, as shown in the block diagram of a CATV receiver in FIG. When a viewer selects a television broadcast signal sent from a CATV connection cable 3, a CATV converter 1 converts the signal into a signal that can be received by a television receiver 2 and outputs the signal.

This signal is generally ICH or 2CH of VHF television broadcasting.
and output to the television antenna terminal 4 of the television receiver 2. To watch CATV television broadcast signals,
Turn on the power to CATV converter 1. Normally, in conjunction with this, the commercial power output from the CATV converter 1 also powers the television receiver 2 through the television power supply court 5. Next, operate CATV converter 1 to convert CATV.
Select a TV channel. To adjust the volume of the television broadcast, the volume of the television receiver 2 is operated.

When stopping viewing, turn off the power to CATV converter 1. These operations are controlled by the remote control transmitter 6, but the CA
A remote control transmitter 6 is required for each of the TV converter 1 and the TV receiver 2.

Recently, in order to use only one remote control transmitter 6, a remote control transmitter 6 called a memory remote control or a learning remote control has been sold. This remote control transmitter 6 is CATV
It is possible to control the converter 1, the television receiver 2, or a VTR (video tape recorder) not shown, and has keys corresponding to the operations of each device, making operations convenient for the viewer.

FIG. 4 shows a CAT using the latter remote control transmitter 6.
This is a time chart of the output frequency of the CATV converter 1 when selecting a channel with the "v' converter 1. This figure shows that when the channel of CATV television broadcasting is changed, the output frequency changes before it stabilizes to the frequency after the channel change. This indicates that when the CATV converter 1 selects a channel, it takes time to set the frequency of its local oscillator to the required frequency for tuning, and the frequency is This is because the signal changes rapidly.As a result, noise is output to the audio output of the television receiver 2, etc.

Also, when turning off the power to CATV converter 1, if the power to CATV converter 1 is turned off while the power to TV receiver 2 is on, a signal containing noise is similarly output from CATV converter 1 to TV receiver 2. Therefore, noise is generated in the audio output of the television receiver 2, etc.

[Problem to be solved by the invention]

As mentioned above, when switching channels on CATV television broadcasts using a conventional remote control transmitter, noise is generated from the CATV converter and the TV receiver generates a large amount of noise, which can be extremely unpleasant for viewers. There was a drawback that it had to be done.

Also, when turning off the power to the CATV converter, if you turn off the power to the CATV converter while the TV is on,
Similarly, since the CATV converter outputs a signal containing noise to the television receiver, there is a drawback that noise is generated in the audio output of the television receiver.

[Means to solve the problem]

The remote control transmitter of the present invention uses a memory remote control, and when one key, for example, a number key is pressed for channel switching,
First, a TV sound erasure control signal is sent to erase the sound of the TV receiver, then a channel switching control signal is sent to the CATV converter to control channel switching of TV broadcasting, and finally the TV audio output is restored. In order to do so, the TV sound deletion control signal for TV sound deletion (recovery) is sent again. This makes it possible to cut off the audio output of the television receiver while the output frequency of the CATV converter is disturbed due to channel switching of CATV broadcasting.

Similarly, when turning off the power to the CATV converter, this remote control transmitter first transmits a TV sound cancellation control signal to control the sound cancellation of the TV receiver, and then
By transmitting a power cut-off control signal for turning off the power to the ATV converter, it is possible to cut off noise generation from the television receiver when the power to the CATV converter is turned off.

As described above, the remote control transmitter of the present invention has means for erasing the audio output from the television receiver by one key operation when switching the reception state of the CATV television broadcast signal receiving device. .

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram of the above-mentioned CATV receiving apparatus, and FIG. 2 is a time chart for explaining a control method using a remote control transmitter according to the present invention. Figure 2 is CAT
An example of channel switching for V television broadcasting is described. When a viewer of television broadcasts sent from the CATV system presses the channel number key on the remote control transmitter 6 to change the channel of the CATV television broadcast, the remote control transmitter 6 first cancels the sound on the television receiver 2. Sends a TV audio cancellation control signal for the TV. As a result, the audio output of the television receiver 2 is cut off. In this state, the remote control transmitter 6 subsequently transmits a channel switching control signal for channel switching control of the CATV converter 1. When CATV converter 1 receives this signal, it performs a channel selection operation. At that time, the output frequency of CATV converter 1 fluctuates. However, since the audio output of the television receiver 2 is cut off, no audio noise is emitted from the speakers of the television receiver 2. Finally, after the output frequency of the CATV converter 1 has sufficiently stabilized, the remote control transmitter 6 erases the TV sound in order to restore the audio output of the TV receiver 2. Usually, the remote control transmitter 6 continues to send the sound cancellation control signal. (Recovers when received) control signal.

FIG. 3 is a time chart for explaining the state of the control signal transmitted from the remote control transmitter according to the present invention, and shows the state of the control signal at the time of channel switching of the above-mentioned CATV television broadcast. At the beginning, a TV sound erasure control signal is transmitted to the TV receiver 2, followed by a channel switching control signal, and then the CATV converter 1
Finally, after a time T1 in which the output frequency of the TV is sufficiently stabilized, a TV sound erasure (restoration) control signal is transmitted. still,
Each control signal includes a reader code, a custom code, and a data code so that it can be recognized by the CATV converter 1 and the remote control receiving side of the television receiver 2.

Similarly, when turning off the power to the CATV converter 1 and the television receiver 2, the remote control transmitter 6 first transmits a television sound deletion control signal for controlling the sound deletion of the television receiver 2, and then the CAT CAT by sending a power-down control signal to power down converter 1.
When the power of V-controller A-1 is turned off, the TV receiver 2
It is possible to cut off noise generation from

In this manner, the remote control transmitter 6 of this embodiment can erase the audio output from the television receiver 2 by one key operation when switching the CATV receiver.

〔Effect of the invention〕

As explained above, the present invention enables a single key operation to control the audio output of a television receiver while the output frequency of the CATV converter is disturbed during the transition period of the reception state when the CATV converter changes channels of television broadcasting or when the power is cut off. This has the effect of providing viewers with comfortable television viewing without audio noise.

[Brief Description of the Drawings] Fig. 1 is a block diagram of a CATV receiving device, Fig. 2 is a time chart for explaining a control method using a remote control transmitter according to the present invention, and Fig. 3 is a remote control transmission according to the present invention. FIG. 4 is a time chart for explaining the state of control signals transmitted from the equipment, and FIG. 4 is a time chart of the CATV output frequency when the CATV converter selects a channel. 1...CATV converter, 2...TV receiver,
3... CATV connection cable, 4... TV antenna terminal, 5... TV power cord, 6... Remote control transmitter.

Claims (1)

[Scope of Claims] 1. A remote control transmitter that controls a CATV receiving device including a CATV converter that receives television broadcast signals broadcasted in a CATV system and a television receiver connected to the CATV converter with one unit, CA
A remote control transmitter comprising a means for erasing the audio output from the television receiver simultaneously with the switching operation by one key operation when switching the TV receiver. 2. The means for cutting off the audio output from the television receiver is means for transmitting a television audio control signal for erasing the audio output of the television receiver during a transition period of switching the reception state of CATV broadcasting by the switching operation. A remote control transmitter according to claim 1, characterized in that: