JPH0271620A - Television receiver - Google Patents

Abstract

PURPOSE:To easily search each program in both ordinary TV broadcast and satellite broadcast by switching each channel of both broadcast sequentially successively by using a channel up/down key. CONSTITUTION:Each channel data of the ordinary TV broadcast and the satellite broadcast are registered on a successive channel address (a). The address (a) is incremented/decremented by the operation of the channel up/down keys 34A and 34B, and the channel data on a designated address (a) is read out. A switch circuit 6 to switch each video signal of the satellite broadcast and the ordinary broadcast and a switch circuit 7 to switch each audio signal are provided, and the circuits 6 and 7 are switched corresponding to the designated address (a). In such a way, it is possible to switch each channel of the satellite broadcast and the ordinary broadcast sequentially successively by using the keys 34A and 34B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television receiver with a built-in BS tuner.

[Summary of the invention]

The present invention provides a television receiver capable of receiving normal television broadcasting and satellite broadcasting, in which the normal television broadcasting channel and the satellite broadcasting channel can be successively switched by using the channel up/down key. This makes it possible to easily search for programs currently being broadcast on regular television broadcasting channels and satellite broadcasting channels.

[Conventional technology]

Satellite broadcasting is becoming widespread. Satellite broadcasting is -
This is television broadcasting using artificial satellites and is intended for direct reception by m viewers.

Satellite broadcasting uses satellites launched into a geostationary orbit 36,000 km above the equator, so it can reach all over the country, including remote islands, mountainous areas, and other hard-to-reach areas that are difficult to reach with terrestrial broadcasting. , can be covered as a service area. In addition, high-quality images can be reproduced without being affected by ghosts from surrounding buildings, etc. Furthermore, P CM (
Pulse Code Modulation), you can enjoy high-quality, powerful sound.

In satellite broadcasting, radio waves with a frequency of 12 GHz are used as carrier waves. In Japan, rBsIJ is a channel in the 12GH2 band that can be used for satellite broadcasting.
, rBs3J, rBs5. , rBs7J, rBs9J,
Eight channels are assigned: rBsll, +, rBsIJ, and rBs 15J.

In order to receive such satellite broadcasting, it has conventionally been necessary to provide a BS antenna and a BS converter, and to add a BS tuner to the television receiver. In contrast, in recent years, television receivers with a built-in BS tuner have appeared that can directly receive satellite broadcasting from the output of a BS converter without adding a new BS tuner.

A television receiver with a built-in S tuner like this has a tuning circuit for selecting regular broadcasting channels (VHFHF television broadcasting and UHF television broadcasting from a ground station) and a tuning circuit for selecting satellite broadcasting channels. There are two channel selection circuits, one for iJ<.

In a conventional television receiver with a built-in BS tuner, when the channel up/down key is used, these two channel selection circuits are operated separately, and the channel up/down key is used to switch between normal broadcast channels and satellite It was not possible to switch broadcast channels sequentially and continuously.

For example, FIG. 5 shows an example of a commander for operating a conventional television receiver with a built-in BS tuner. In FIG. 5, 51 is a power key for turning on/off the power. 52, 52, 52, . . . are direct channel selection keys for directly selecting satellite broadcast channels, and 53A and 53B are channel up/down keys for up/down channels within the satellite broadcast channels. It is. 54, 54, 54, . . . are direct channel selection keys for directly selecting a normal broadcast channel, and 55A and 55B are channel up/down keys for changing channels within the normal broadcast channel. be. 56A and 56B are up/down keys for volume adjustment.

In this way, the commander that operates a conventional television receiver with a built-in BS tuner has direct tuning keys 52, 52, 5 for selecting satellite broadcast channels.
2, . . . channel up/down keys 53A and 53B for up/down channels within the satellite broadcast channels, and direct channel selection keys 54, 54. 54,
...and a channel up/down key 5 for up/down channels within the normal broadcast channels.
5A and 55B are provided separately. To select a satellite broadcast channel, direct channel selection keys 52, 52, 52, . . . or channel up/down keys 53A and 53B are used, and to select a regular broadcast channel, the direct channel selection key 54.54.
54, ... or channel up/down key 55
A and 55B are used. In this way, the channel up/down keys 53A and 53B are used to turn up and down channels within satellite broadcasting channels, and the channel up/down key 55A is used to turn up and down channels within normal broadcasting channels. and 5
5B are provided separately, it is not possible to use a common channel up/down key to sequentially and continuously switch channels from the normal broadcast channel to the satellite broadcast channel.

In addition, in the built-in television reception in the BS tuner,
As shown in FIG. 5, there are up/down keys 53A and 53B for up/down channels within satellite broadcast channels, and channel up/down keys for up/down channels within normal broadcast channels.
Some devices do not have separate down keys 55A and 55B, but instead use a common channel up/down key to switch between satellite broadcast channels or regular broadcast channels.

However, with conventional television receivers like this with a built-in S tuner, when receiving satellite broadcasts, the channel up/down within the satellite broadcast channel is done by operating the channel up/down key, and the normal When receiving television broadcasting, the channel up/down within the normal broadcast channels is performed by operating the channel up/down key. Therefore, it is not possible to sequentially and continuously switch channels from the normal broadcast channel to the satellite broadcast channel using the channel up/down keys.

In other words, on a television receiver with a built-in S tuner like this, if you press the channel up key while receiving satellite broadcasting, for example, rBs1 → BS3 →
BS5→BS7→BS9→B51l→B513→B51
5...'', the set channel is switched within the satellite broadcasting channel. When receiving normal broadcasts, pressing the up key will display the message '1→3→4.
→ 6 → 10 → 16 → 12...'', the set channel is switched within the normal TV broadcast channel.

[Problem to be solved by the invention]

In this way, with conventional television receivers equipped with a built-in BS tuner, you can use the channel up/down keys to sequentially switch from regular broadcast channels to satellite broadcast channels.
Unable to switch channels continuously.

The channel up/down key is often used to search what programs are currently being aired on each station and set the channel to the program you most want to watch.
Therefore, using the channel up/down keys,
It is desirable to be able to sequentially and continuously switch channels from regular broadcast channels to satellite broadcast channels.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a television receiver that can sequentially and continuously change channels from a normal broadcast channel to a satellite broadcast channel using a channel up/down key.

[Means to solve the problem]

This invention provides a television receiver capable of receiving normal television broadcasting and satellite broadcasting, in which the normal television broadcasting channel and the satellite broadcasting channel can be successively switched by using the channel up/down key. This television receiver is characterized in that it is provided with a means for switching to.

[Effect]

Channel data of a normal broadcast channel and channel data of a satellite broadcast are registered in consecutive channel addresses a.

Channel address a is incremented or decremented by operating channel up/down keys 34A and 34B. In this way, the channel data of the designated channel address a is read out.

A switch circuit 6 that switches between a video signal from satellite broadcasting and a video signal of normal broadcasting, and a switch circuit 7 that switches between an audio signal of satellite broadcasting and an audio signal of normal broadcasting are provided, and the channel of the designated channel address a is provided. These switch circuits 6 and 7 are switched depending on whether the data is a satellite broadcast channel or not.

Thereby, it is possible to sequentially and continuously switch between the satellite broadcast channel and the normal broadcast channel using the channel up/down keys 34A and 34B.

〔Example〕

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

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, 1 is a BS antenna 0. For example, the BS antenna 1 receives satellite broadcast radio waves sent from a satellite launched into a geostationary orbit at 36,000 km above the equator at 110 degrees east longitude. The received output of the BS antenna 1 is supplied to the BS converter 2.

The BS converter 2 converts the 12 GHz frequency band signal received by the BS antenna 1 into a BS-I frequency band signal.
This converts the signal by F times. The output of this BS converter 2 is supplied to a BS tuning circuit 3.

The BS tuning circuit 3 receives the B output from the BS converter 2.
After selecting a desired satellite broadcasting channel signal from the S-IF multiplied signal and converting it to a second intermediate frequency, this is FM restored to extract a composite color video signal and an audio PCM subcarrier signal. The satellite broadcast channel is set based on channel selection data D1 from the microcomputer 10.

The BS channel selection circuit 3 outputs a composite color video signal and an audio PCM subcarrier signal.

This composite color video signal is transmitted to the BS video signal processing circuit 4.
The audio PCM subcarrier signal is supplied to the PCM decoder 5.

The BS video signal processing circuit 4 performs processes such as de-emphasis and removal of energy spread signals. The composite color video signal passed through the BS video signal processing circuit 4 is supplied to the input terminal 6A of the switch circuit 6.

PCM decoder 5 outputs audio P from BS channel selection circuit 3
The CM11J carrier signal is phase-detected, subjected to processes such as descrambling, deinterleaving, error correction, etc., and the digital audio signal is decoded. Then, the decoded digital audio signal is D/A converted,
converted back to an analog audio signal. This analog audio signal is supplied to the input terminal 7A of the switch circuit 7.

Reference numeral 11 denotes a television antenna that receives normal television signals from terrestrial broadcasting stations. A signal received by the television antenna 11 is supplied to a channel selection circuit 12. A channel selection circuit 12 selects a desired channel signal from among the signals received by the television antenna 11. The channel setting at this time is made based on the channel selection data D2 from the microcomputer 10.

The intermediate frequency signal from the tuning circuit 12 is transmitted to the intermediate frequency amplifier circuit 1.
3 and is supplied to the video detection circuit 14. A video detection circuit 14 detects the composite color video signal. A composite color video signal from video detection circuit 14 is supplied to input terminal 6B of switch circuit 6.

Further, the output of the intermediate frequency amplification circuit 13 is supplied to the audio signal processing circuit 15. Audio signal processing circuit 15
Then, an audio signal is detected from a beat component with a frequency of 4.5 MHz. This audio signal is supplied to the input terminal 7B of the switch circuit 7.

Switch circuit 6 and switch circuit 7 are switched by a select signal SL from microcomputer 10. For example, when the select signal SL is at "L" level,
Input terminal 6A and output terminal 6C of switch circuit 6 are connected, and input terminal 7A and output terminal 7C of switch circuit 7 are connected.

When the input terminal 6A of the switch circuit 6 and its output terminal 6C are connected, the switch circuit 6 outputs a video signal based on the program of the satellite broadcast channel selected by the channel selection circuit 3. Further, when the input terminal 7A and the output terminal 7C of the switch circuit 7 are connected, the switch circuit 7
An audio signal based on the program of the satellite broadcasting channel selected by the channel selection circuit 3 is output.

For example, when the select signal SL is at the "H" level, the input terminal 6B and output terminal 6C of the switch circuit 6 are connected, and the input terminal 7B and output terminal 7C of the switch circuit 7 are connected.

When the input terminal 6B of the switch circuit 6 and its output terminal 6C are connected, the switch circuit 6 outputs a video signal based on the program of the normal broadcast channel selected by the channel selection circuit 12. Further, when the input terminal 7B and the output terminal 7C of the switch circuit 7 are connected, the switch circuit 7 outputs an audio signal based on the program of the normal broadcast channel selected by the channel selection circuit 12.

The output of the switch circuit 6 is supplied to a video signal processing circuit 16. The video signal processing circuit 16 separates a luminance signal Y and a chroma signal C from the composite color video signal, demodulates color difference signals R-Y and B-Y from the separated chroma signal C, and demodulates the luminance signal Y and color difference signal Three primary color signals R, G, and B are formed from R-Y and B-Y by a matrix circuit.

Three primary color signals R, G, and B from the video signal processing circuit 16 are supplied to a color picture tube 17.

The output of the switch circuit 7 is supplied to an audio amplifier 18, and the audio signal passed through the switch circuit 7 is amplified by the audio amplifier 18. The output of audio amplifier 18 is supplied to speakers 19A and 19B.

21 is a commander. A command signal from the commander 21 is received by the receiving circuit 22. The output of the receiving circuit 22 is supplied to the microcomputer 10. Various operation settings are made by command signals from the commander 21.

Character data is output from the microcomputer IO according to the setting mode. This character data is supplied to the character generator 23. The character signal from the character generator 23 is superimposed on the video signal from the video signal processing circuit 16.

FIG. 2 shows an example of the commander 21. As shown in Figure 2, the commander 21 has power on/off controls.
Power key 31 for turning off, direct channel selection key 32 for directly selecting satellite broadcast channels.
32, . . . Direct channel selection keys 33. 33. 33, . . . Channel up/down keys 34A, 34B, Up/down keys 35A for volume adjustment, 35B is arranged.

In the memory of the microcomputer 10, for example, as shown in FIG.
Continuous channel dresses a are prepared up to. Channel data is registered in advance corresponding to this channel address a. Note that channel data "0" is registered in an empty channel. Direct selection key 32.32
．． 32,... or direct selection key 33.33
．． 33, . . . is pressed, channel address a is designated, and the channel selection data D1 or D2 of the designated channel address a is output from the microcomputer 10. This allows the desired channel to be directly set.

Additionally, in one embodiment of the present invention, the channel up/down keys 34A and 34B can be used to sequentially and continuously switch between satellite broadcast channels and regular broadcast channels. FIG. 4 is a flow chart for explaining such control.

Note that this example shows the processing when the channel up key 34A is pressed. Channel down key 34
The same applies to the case where B is pressed.

For example, assume that the channel up key 34A is pressed.

When the channel up key 34A is pressed, the channel data of the current channel address a is read out (
Step ■).

Then, channel address a is the final address "
20'' (step ■).

If channel address a is not the final address "20", channel address a is incremented (
Step (2), if channel address a is the final address "20", channel address a is set to the first address "1" (step (2)).

The channel data of the channel address a set in step ■ or step ■ is read out, and it is determined whether this channel data is "0" (step ■)
. As mentioned above, channel data "0" is
Indicates an empty channel.

If the channel data of channel address a is r□, return to step ■.

If the channel data of channel address a is other than "0", it is determined whether the channel data of channel address a is a satellite broadcasting channel (step 2).

If the channel data of the channel address a is a satellite broadcasting channel, the select signal SL given to the switch circuit 6 and the switch 7 is set to "L" level (step
). When the select signal SL is set to the "L" level, as described above, the input terminal 6A of the switch circuit 6 and its output terminal 6C are connected, and the input terminal 7A of the switch circuit 7 and its output terminal 7C are connected. .

Then, the BS channel selection circuit 3 is given the channel selection data D1 corresponding to the channel data of the channel address a at that time (step 2).

In this case, since the input terminal 6A of the switch circuit 6 and its output terminal 6C are connected, a video signal based on the program of the satellite broadcast channel selected by the channel selection circuit 3 is outputted from the switch circuit 6, and this satellite broadcast Images of the channel's programs are projected onto a color picture tube 17. Further, since the input terminal 7A and the output terminal 7C of the switch circuit 7 are connected, an audio signal based on the program of the satellite broadcast channel selected by the channel selection circuit 3 is outputted from the switch circuit 7, and the audio signal based on the program of the satellite broadcast channel selected by the channel selection circuit 3 is output from the switch circuit 7. audio output is obtained from speakers 14A and 14B.

If the channel data of the channel address a is not a satellite broadcasting channel, the select signal SL given to the switch circuit 6 and the switch circuit 7 is set to "Hj level (
Step ■). When the select signal SL is set to the rH level, as described above, the input terminal 6B of the switch circuit 6
and its output terminal 6C are connected, and the input terminal 7B of the switch circuit 7 and its output terminal 7C are connected.

Then, the channel selection circuit 12 receives the current channel address a.
The channel selection data D2 corresponding to the channel data of is given (step [phase]).

In this case, since the input terminal 6B of the switch circuit 60 and its output terminal 6C are connected, a video signal based on the normal television broadcast program tuned by the channel selection circuit 12 is output from the switch circuit 6. The image of the program on the selected channel is displayed on the color picture tube 17. Further, since the input terminal 7B and the output terminal 7C of the switch circuit 7 are connected, an audio signal based on a normal television broadcast program tuned by the channel selection circuit 12 is output from the switch circuit 7, and this audio signal is output from the switch circuit 7. Output is speaker 14
A and 14B.

The set channel number is displayed on the color picture tube 17 (step 0). Then, the set channel address a is stored (step @).

As described above, in one embodiment of the present invention, the satellite broadcast channel and the regular broadcast channel can be sequentially and continuously switched by operating the channel up/down keys 34A and 34B.

For example, if the channel data is registered as shown in FIG.
→12'', and then rBs1 → BS3 → BS5 → BS7 →
The satellite broadcasting channels are sequentially switched in the order of BS9→B51l→B513→B515J. Then, when the channel up key 34A is further pressed, “1→3→4→
...'', the channel is switched back to the normal broadcast channel.

Note that the order in which channels are switched can be freely set depending on how channel addresses are registered.

Alternatively, the number of channel addresses may be set to "12" and the satellite broadcast channel may be set to an empty channel of the normal television channel.

〔Effect of the invention〕

According to the invention, channel up/down-I--
34A and 34B can be used to sequentially and continuously switch channels from regular television broadcast channels to satellite broadcast channels. By using the channel up/down keys 34A and 34B to sequentially and continuously change channels from the regular broadcast channel to the satellite broadcast channel, you can change the current regular television broadcast and satellite broadcast programs. Easy to search.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of this invention, FIG. 2 is a plan view of an example of a commander in an embodiment of this invention,
FIG. 3 is a route map used to explain an embodiment of the present invention, FIG. 4 is a flowchart used to explain an embodiment of the invention, and FIG. FIG. 3 is a plan view used for explanation. Explanation of main symbols in the drawings 1: BS antenna, 2: BS converter 3: BS channel selection circuit, 6, 1: switch circuit, 10: microcomputer, 11: television antenna. 12: Tuning circuit, 21: Commander 34A, 34B 2 channel up/down key + Manner 1 4-tonto All East Fig. 3 70- + Mart Fig. 4 Shibako commander Fig. 5

Claims (1)

[Claims] Channel up/down on television receivers that can receive regular television broadcasts and satellite broadcasts.
1. A television receiver comprising means for sequentially and continuously switching between the normal television broadcasting channel and the satellite broadcasting channel using a down key.