JPH0738822A - Channel selecting device - Google Patents

Abstract

PURPOSE:To improve the operability by selecting channels in order according to the reception frequencies by referring to channel data in a storage means. CONSTITUTION:With a channel setting key 15, a remote control transmitter 11 supplies an indication to a control part 17 through a photodetection part 16. Then scanning operation is performed with channel up/down keys 13 and 14 and a tuner part 9 selects a channel. Then the channel is set with a channel selection key 12 and specific channel data are written in a memory 18. Thus, the channel is set. Channel data corresponding to respective keys 12 are read out with the keys 12 and a control signal for the selecting operation of the tuner part 9 is supplied. At the same time, information on the selected channel is supplied to a character generating circuit 8 and the channel number is sent to a video signal processing circuit 4 and displayed on the screen of a CRT 5. Thus, the operability at the time of channel feeding operation can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel selecting device for selecting a received wave corresponding to a predetermined station from received waves of a plurality of stations.

[0002]

2. Description of the Related Art Generally, a television receiver is provided with a channel selection device for selecting a reception wave of a predetermined station from reception waves from a plurality of stations received by an antenna.

The following is an example of a channel selection device. That is, a selection means having a tuner for selecting one channel from a plurality of channels, a plurality of channel selection keys for directly selecting one channel from the plurality of channels, and a predetermined number of keys in the up / down direction sequentially. A channel operation key for selecting a channel, key operation means for generating an operation instruction corresponding to each key each time these keys are operated, storage means for storing channel data, and the channel There is one provided with a channel setting means for storing channel data corresponding to each selection key in the storage means, and a control means for controlling a tuning operation based on an operation instruction from the key operation means.

The key operation means is generally provided in a remote control transmitter and has, for example, 12 channel selection keys, a channel up key and a channel down key.

Numbers from "1" to "12" are preliminarily assigned to the respective channel selection keys. For example, when the number "1" key is pressed at the time of channel selection, one channel (hereinafter,
It can be set so that the key number and the channel number match so that (1CH) channel is selected.

The channel up key and the channel down key are used when switching channels sequentially. For example, if the channel up key is manually operated, 1CH, 2CH,
Channels can be sequentially selected like 3CH, ..., 12CH. That is, switching is performed sequentially along a closed loop formed based on the order of the numbers assigned to the channel selection keys. This state is shown in FIG.

On the other hand, in recent years, many broadcasting stations such as UHF have been born, and with the increase in the number of broadcasting stations, it is required to simplify the tuning operation.

Therefore, in VHF, for example, these increased channels are assigned to the numeric keys corresponding to the unused channels. For example, as shown in FIG. 5, the selection key corresponding to the unused channel 2, which is currently numbered 2 in VHF, is set to the UHF broadcasting station 2
8CH is assigned, and similarly, 48CH is assigned to the channel selection key corresponding to channel 5. Therefore, channels corresponding to VHF band and UHF band broadcast stations received in the viewer's area are set in each channel selection key in a mixed manner.

However, when the channels are switched by the operation of the channel up key or the channel down key, the channels are selected in the order assigned to the channel selection keys. Therefore, for example, the VHF band 1CH is followed by the UHF band 28CH. Is selected, then channel 3 of the VHF band is selected again, and it is difficult to predict in which order the channels of VHF and UHF will be selected, which is not convenient for the viewer.

[0010]

As described above, in the conventional channel selecting apparatus, when the channel up key and the channel down key are successively selected, which broadcasting station is the next selected channel. It is difficult to predict that, and it is not convenient for the viewer. That is, the operability is poor.

It is an object of the present invention to provide a channel tuning device capable of improving operability during a channel feeding operation.

[0012]

The present invention is a channel selecting device for selectively receiving a broadcast wave of a desired predetermined channel from broadcast waves of a plurality of channels, the tuner including a tuner. Selecting means for selectively receiving a broadcast wave of one channel from among the broadcast waves of, a plurality of channel selection keys for directly selecting a desired channel from the plurality of channels, A channel operation key for sequentially selecting broadcast waves, key operation means for performing an operation instruction corresponding to each key each time the channel selection key and the channel operation key are operated, and each of the channels Storage means capable of storing the channel selection data necessary for receiving the broadcast wave and the channel selection keys are made to correspond to each other. When the channel setting means for storing the channel selection data in the storage means and the channel feed key of the key operation means are operated, the channel selection data in the storage means is referred to sequentially according to the order of magnitude of the reception frequency. And control means for controlling the selecting means to perform channel selection.

[0013]

[Operation] In the channel selection device of the present invention, when the channel feed key of the key operation means is operated, the channel data of the storage means is referred to and the channels are selected sequentially according to the order of magnitude of the reception frequency. The selection means is controlled as described above.

Therefore, when the VHF band broadcasting station and the UHF band broadcasting station are mixed, it is possible to select a channel of either one of the bands and then sequentially select the other channel. It is easy for the user to use, and the operability can be improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a television receiver in which an embodiment of the channel selecting apparatus of the present invention is used.

As shown in FIG. 1, the television receiver 1 selects an antenna 2 for receiving the received waves of a plurality of stations and a received wave of a predetermined station from the received waves of the respective stations received by the antenna 2. Then, the channel tuning device 3 for converting the selected received wave into an intermediate frequency signal (hereinafter, referred to as an IF signal)
And a video signal processing circuit 4 for performing processing such as separation of the video signal from the IF signal and amplification of the video signal, and a cathode ray tube to which the video signal from the video signal processing circuit 4 is supplied (hereinafter,
CRT) 5 and separation of audio signal from IF signal,
An audio signal processing circuit 6 that performs processing such as amplification of the audio signal, a speaker 7 to which the audio signal from the audio signal processing circuit 6 is supplied, and characters such as characters and figures for superimposing on the screen of the CRT 5. Is generated, and this character signal is generated by the video signal processing circuit 4
And a character signal generation circuit 8 for outputting to.

The channel selection device 3 has a tuner section 9 for selecting a reception wave of a predetermined station by selecting one channel from reception waves of a plurality of channels received by the antenna 2. The operation instruction for the selection operation of the tuner unit 9 is output from the operation unit 10 and the remote control transmitter 11.

The operation unit 10 is provided on the front panel of the main body of the television receiver 1. The operation unit 10 is
A switch (not shown) for selecting a channel,
Includes a switch (not shown) for turning the main power on and off, a switch (not shown) for setting the volume, etc. By operating each switch, operation instructions corresponding to each switch are generated. To be done.

On the other hand, the remote control transmitter 11 is provided with, for example, twelve channel selection keys 12, a channel up key 13 and a channel down key 14, and a channel setting key 15 which are manually operated. There is.

Each channel selection key 12 is assigned a number from "1" to "12", for example, "1".
When the channel selection key 12 numbered with is pressed, an operation instruction for selecting 1CH is generated.

The channel up key 13 is an operation key for generating an operation instruction for sequentially switching from the currently selected channel to a higher frequency channel each time it is manually operated. On the other hand, the channel down key 7 is an operation key for generating an operation instruction for sequentially switching from the currently selected channel to a channel of a low frequency each time it is manually operated.

The channel setting key 15 is an operation key for associating a predetermined channel with each channel selection key 12, and by operating this key, for example, the selection key of the number "1" is set to 1CH and other numbers are set. Similarly, an arbitrary channel is set to the key of. An operation instruction from the remote control transmitter 11 is converted into an infrared modulated signal, and this modulated signal is given to the light receiving unit 16.

The light receiving section 16 demodulates the modulated signal from the remote control transmitter 11 and generates an operation instruction indicated by the modulated signal.

Operation instructions from the light receiving section 16 and the operation section 1
The operation instruction from 1 is given to the control unit 17. Control unit 1
Reference numeral 7 denotes a channel selection control for controlling a channel selection operation, a channel setting control for setting a channel, a brightness and contrast control for the video signal processing circuit 4, and a sound volume for the audio signal processing circuit 6. Etc. and character signal generation control such as a channel number for the character signal generation circuit.

Two modes are set for the channel selection control. The first mode is direct channel selection by operating the channel selection key 12, each channel data preset in the channel selection key 12 is read from the memory 18, and the selection operation of the tuner unit 9 is performed based on this channel data. This is the control mode.

On the other hand, the second mode is sequential channel selection, in which the channel up key 13 or the channel down key 14 is used to sequentially switch from the currently selected channel to a channel having a higher frequency, and vice versa. It is a mode that switches to a channel with a low frequency.

The channel setting control is executed by operating the channel setting key 15. For example, after operating the channel setting key 15, the received wave of a predetermined station is received by the scan operation using the up / down keys, and in that state, the predetermined channel selection key 12 is pressed to select the channel selection key. The channel corresponding to the station is set. At the same time when this channel setting is performed, the channel data of the set channel is written in the memory 18.

Next, channel setting control and channel selection control will be described with reference to the drawings. 2 is a flow chart for explaining channel setting control of the channel tuning apparatus of FIG. 1, FIG. 3 is a flow chart for explaining channel tuning control of the channel tuning apparatus of FIG. 1, and FIG. 4 is a channel of FIG. It is a figure for demonstrating the sequential channel selection operation | movement of the channel of a channel selection apparatus.

In the channel selection key 12, 1CH is set to the channel key assigned with the number "1", for example, according to the order of frequencies, and so on. 3C, 4C for the key with the number "4"
H, 6CH for the "6" number key, 8CH for the "8" number key, 10CH for the "10" number key,
The same number is set to the key with the number "12", such as 12CH. For the key with the number "2", for example, the UHF band broadcasting station 28CH is set, and for the key with the number "5", 48CH is set.

In such channel setting, as shown in FIG. 2, first, the channel setting key 15 is operated (step 101). Along with this, an operation instruction from the Remoto control transmitter 11 is given to the control unit 17 via the light receiving unit 16 (step 102). Next, the channel up / down keys 13 and 14 are operated to sequentially perform the scan operation (step 103), and the tuner unit 9 is operated.
Then, a predetermined channel is selected (step 104).

Next, a predetermined channel selection key 12 is pressed, and, for example, the key numbered "2" is changed to 2
8CH is set (step 105). When this channel setting is performed, 28C set in the memory 18 is set.
Channel data of H is written (step 10)
6). In this way, a desired channel is set for each channel selection key 12.

Next, channel selection control will be described with reference to FIGS. 3 and 4.

First, the channel selection key numbered "2" is set to the UHF band broadcasting station 28CH, and the channel selection key numbered "5" is set to the UHF band broadcasting station. It is assumed that 48CH is set.

When the channel selection key 12 is operated, the first mode is executed, the channel data corresponding to each channel selection key 12 is read from the memory 18, and the selection operation of the tuner section 9 is performed based on this channel data. A control signal for controlling is generated. This control signal is given to the tuner section 9. Along with the generation of this control signal, channel information for representing the currently selected channel is generated, and this channel information is given to the character signal generation circuit 8. The character signal generation circuit 8 gives a signal indicating a channel number to the video signal processing circuit 4 based on the channel information, and the currently selected channel number is displayed on the screen of the CRT 5 together with the video.

When the channel up key 13 or the channel down key 14 is operated, the second mode is executed. For example, when the channel up key 13 is operated (step 201), as shown in FIG. 3, the presence or absence of a set channel having a frequency higher than that of the currently selected channel is detected (step 202). The presence / absence of the set channel is detected by referring to the channel data stored in the memory 18.

When there is a set channel having a high frequency, the channel data of the lowest frequency is selected from them (step 203).

When there is no setting channel having a frequency higher than the frequency of the currently selected channel, the channel data having the lowest frequency is selected from the channel data of all the settings stored in the memory 18. (Step 204).

After selecting the channel data, the tuner unit 9
Selects the channel corresponding to the selected channel data and switches from the current channel to the selected channel (step 205).

After the channel selection operation is completed, the image of the selected channel is displayed on the screen of the CRT 5 (step 206).

When the channel down key is operated, the presence or absence of a setting channel having a frequency lower than the frequency of the currently selected channel is detected, and when a setting channel having a low frequency exists, The channel data having the highest frequency is selected from them. If there is no setting channel having a frequency lower than the currently selected channel, the channel data having the highest frequency is selected from all the setting channel data stored in the memory 18.

In this way, the channel feed path when the channels are selected sequentially by channel up or channel down is as shown in FIG. After the channels corresponding to the channel selection keys 12 of “1”, “3”, “4”, “6”, ... A closed loop is formed from the channel (28CH) corresponding to the channel selection key 12 and the channel (48CH) corresponding to the channel selection key 12 of number "5" to the channel of number "1".

As described above, for example, when the VHF band channel and the UHF band channel are mixed, the channels are sequentially selected in ascending order of frequency or in the order of increasing frequency. Therefore, the VHF channels are selected in order. It is possible to select the UHF channel after selecting the VHF channel without interrupting the next UHF channel during the operation. Therefore, the usability is improved for the viewer and the operability can be improved.

[0044]

As described above, according to the channel selecting apparatus of the present invention, the operability during the channel feeding operation can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a television receiver in which an embodiment of a channel selection apparatus of the present invention is used.

FIG. 2 is a flowchart for explaining channel setting control of the channel selection device of FIG.

3 is a flow chart for explaining channel tuning control of the channel tuning apparatus of FIG.

FIG. 4 is a diagram for explaining the sequential channel selection operation of the channel channel selection device of FIG.

FIG. 5 is a diagram for explaining a channel sending order in a channel sending operation of a conventional channel tuning device.

[Explanation of symbols]

 2 antenna 3 tuner tuning device 9 tuner unit 10 operation unit 11 remote control transmitter 12 channel selection key 13 channel up key 14 channel down key 15 channel setting key 16 light receiving unit 17 control unit 18 memory

Claims (1)

[Claims] 1. A channel selection apparatus for selectively receiving a broadcast wave of a desired predetermined channel from broadcast waves of a plurality of channels, the tuner including a tuner, and one channel of the broadcast waves of the plurality of channels. Selecting means for selectively receiving broadcast waves, a plurality of channel selection keys for directly selecting a desired channel from among the plurality of channels, and for sequentially selecting broadcast waves of a plurality of channels A channel operation key, key operation means for giving an operation instruction corresponding to each key each time the channel selection key and the channel operation key are operated, and channel selection necessary for receiving the broadcast wave of each channel. Storage means capable of storing station data, and each channel selection data is stored in advance in correspondence with each channel selection key. When the channel setting means to be stored in the storage means and the channel feed key of the key operation means are operated, the channel selection data in the storage means is referred to and the channels are sequentially selected according to the order of magnitude of the reception frequency. And a control means for controlling the selection means.