JP3036158B2 - Television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver for clear vision broadcasting and satellite broadcasting.

[0002]

2. Description of the Related Art In recent years, satellite broadcasting has been started and has been well received, but new satellite broadcasting by a pay system has also been started and has been well received.

On the other hand, clear-vision broadcasting by terrestrial broadcasting has also started, and television receivers corresponding to this broadcasting are also on the market.

[0004] However, the pay-based satellite broadcasting requires a descramble decoder (hereinafter abbreviated as descrambler) when the signal is scrambled and viewed. In contrast to the conventional NTSC system television broadcasting, one field is composed of 262.5 scanning lines at 60 Hz, whereas the clear vision broadcasting has 5 scanning lines at 60 Hz.
The image quality is improved by configuring one field with 25 lines. Further, a ghost countermeasure reference signal (hereinafter abbreviated as GCR) is included in the broadcast.

In order to improve the ghost, a method is used in which a ghost reducer is used to perform waveform equalization using a plurality of taps on the video signal with reference to the GCR to obtain a ghost-reduced video signal. The ghost countermeasure in the clear vision is only for the video signal, and there is no countermeasure for the audio signal.

A conventional satellite television receiver for clear vision ghost removal will be described below with reference to the drawings.

As shown in FIG. 4, an antenna 1 for receiving a terrestrial television broadcast, a UV tuner 2 for receiving and selecting a terrestrial television broadcast, and a video signal from the UV tuner 2 are output to a ghost reducer. GR for
An output terminal 3, a GR input terminal 4 for inputting a ghost-reduced video signal from the ghost reducer, a connection detection 5 for detecting a connection of the ghost reducer, a video signal from the UV tuner 2 and a video signal from the GR input terminal 4. Changeover switch 6 for switching between video signals, B including outdoor unit
S antenna 7, BS tuner 8 for detecting a satellite broadcast signal from BS antenna 7, detection output terminal 9 for outputting a detection output of BS tuner to a descrambler for decoding a scrambled signal of pay satellite broadcasting, BS tuner 8, an extended input terminal 11 for inputting a video signal decoded by the descrambler, a connection detection 12 for detecting the connection of the descrambler, and a signal from the BS tuner 8. A changeover switch 13 for switching between a video signal and a video signal from the extension input terminal 11, a first external video input terminal 14 for inputting an external video signal, and a second external video for inputting an external video signal Input terminal 15, switches 6, 13 and first external video input terminal 14 and second external video input terminal 1 Input switching unit 16 for switching the input of each video signal from the CPU, a video processing unit 17 for video processing and displaying the video signal from the input switching unit 16, and a display for displaying the signal processed by the video processing unit 17. The display 18, the control unit 1 that performs various control processes such as channel selection of each tuner, video signal switching, and key input correspondence.
9, a key input unit 20 for performing key input, a GR setting switch 21 for selecting a ghost removal process for each channel, and a GR setting switch for storing a GR setting content for selecting a ghost removal process for each channel It comprises a GR channel attribute memory 22 and the like.

[0008] The relationship and operation of each component of the conventional clear television ghost removal compatible satellite broadcast television receiver comprising the above components will be described below.

Normally, when the input of a television signal is selected by the key input section 20, the control section 19 switches the input switching section 16 in accordance with the key input, and switches 6, 13 and the first external video signal input terminal 14 Further, an arbitrary video signal from the second external video signal input terminal 15 is switched, and the video signal is processed by the video processing unit 17 and displayed on a display 18 such as a cathode ray tube.

When terrestrial broadcasting is selected by the key input unit 20, the control unit 19 sets an arbitrary channel for the UV tuner 2 and simultaneously selects the input switching unit 16 to the switch 6. At this time, when the ghost reduction tuner is connected to the outside (not shown), the video signal output of the UV tuner 2 is output to the ghost reduction tuner connected from the GR output terminal 3 and the ghost-removed video is output. The signal is returned to the GR input terminal 4 as a signal. This state is detected by the connection detection 5 and input to the control unit 19. When a ghost reduction tuner is connected, the ghost removal setting can be performed for each arbitrary channel by the GR setting switch 21 for each channel. This is because even if the ghost is the same television receiver, the state differs for each channel, and if the ghost state is good, ghost removal is not necessary. At this time, the ghost-removed channel is stored in the GR channel attribute memory 22 via the control unit 19. When the ghost reduction tuner connection is detected by the connection detection 5 and the ghost removal setting is performed by the GR channel attribute memory 22, the control unit 19 selects the video signal in which the switch 6 is switched to the GR input terminal 4 side.

When satellite broadcasting is selected by the key input unit 20,
The control unit 19 performs an arbitrary channel setting on the BS tuner 8 and, at the same time, selects the input switching unit 16 on the switch 13 side. At the time of receiving satellite broadcasts, since a broadcast radio wave is directly received from a broadcast satellite, no countermeasures for ghost removal are required. On the other hand, in satellite broadcasting, it is necessary to receive a broadcast employing a pay broadcasting system (hereinafter referred to as pay broadcasting). In this method, a pay broadcast is obtained by scrambling a broadcast signal and decoding the broadcast signal by a dedicated descramble decoder (not shown).
For this purpose, the BS tuner 8 has a detection output terminal 9 and a bit stream terminal 10, which are connected to a descramble decoder. The descramble decoder outputs a video signal and an audio signal (omitted), and the video signal is connected to the switch 13 via the extension input terminal 11. Upon detecting a signal input, the extension input terminal 11 switches the switch 13 to the extension input terminal 11 side.

[0012]

However, in the above-described conventional configuration, a dedicated adapter is required to receive a pay broadcast, and the satellite television receiver for clear vision ghost removal performs ghost removal. Therefore, when a ghost reduction tuner is connected, a ghost removal setting is required for each arbitrary channel.

That is, even if there is a difference between terrestrial broadcasting and satellite broadcasting, even when using the same broadcasting system media, the terrestrial broadcasting system can set a ghost for each channel using a dedicated key. There is a problem that the user is inconvenient, for example, the key becomes meaningless. In addition, when a descrambling decoder for satellite broadcasting is connected, the processing after the detection output and bit stream are not performed by the BS tuner side. There is a problem in that it becomes the descramble decoder side, and audio switching and the like cannot be set by a key input unit attached to the television receiver body.

Further, when an arbitrary channel is set to a ghost removal setting when the ghost reduction tuner is connected, the setting is not displayed on the on-screen display. If it is turned off, only the channel for which ghost removal is set will not be displayed, and the cause will be difficult to understand, giving rise to anxiety during use. Also, software processing for terrestrial broadcasting and satellite broadcasting will be complicated. There is a problem that the program capacity is significantly increased.

The present invention solves the above-mentioned conventional problems. Since the ghost removal channel setting and the descrambling decoder connection channel setting can be executed by the same operation procedure, the key operation can be simplified, so that the television reception for satellite broadcast reception can be performed. The purpose is to provide a machine.

[0016]

In order to achieve the above object, a television receiver according to the present invention comprises means for storing channel attributes corresponding to each of terrestrial and satellite broadcast channels, ghost elimination, and descrambling decoder. Dedicated key means for making connection settings, means for storing display data for ghost removal on-screen display, control means having a satellite broadcast descramble decoder connection detection port, BS tuner video signal switch controlled by the control part A video signal having no ghost removal, a video signal having been subjected to ghost removal processing, a video signal from a satellite broadcast receiving tuner, a video signal from a descramble decoder, and a video signal from a descramble decoder which can be controlled by the control unit. Input signal such as switching means for input signal and corresponding audio signal switching means It has a configuration such that it can switch between original manner.

[0017]

According to the present invention, the ghost elimination channel setting and the pay broadcast descramble decoder connection channel can be set using one dedicated key in the above configuration, and the connection state can be displayed on-screen for each channel. In addition, the software processing can be significantly reduced by unifying the changeover switch separately.

[0018]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the same components as those shown in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, a channel attribute switch 31 for setting a ghost removal channel and a pay broadcast descramble decoder connection channel is provided, and the contents thereof are stored in a channel attribute memory 32. Further, the control unit 33 performs various control processes such as channel selection of each tuner, video signal switching, and key input correspondence such as writing the setting contents of the channel attribute setting switch 31 to the channel attribute memory 32. Further, a connection detection 34 for detecting the connection of the descrambler and outputting the same to the control unit 33, and a switching for switching between the video signal from the BS tuner 8 and the video signal from the extended input terminal 11 according to the control signal from the control unit 33. A switch 35 and an on-screen display data memory 36 for displaying channel attribute contents are newly provided.

The operation of the television receiver configured as described above will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, when a request is made by the key input unit 20, an arbitrary video signal can be selected by the input switching unit 16 by the control unit 33.

When a terrestrial broadcast channel is set, when a channel attribute setting for setting a ghost removal channel is made by a channel attribute setting switch 31, the content is stored in a channel attribute memory 32 by a control unit 33. In this case, the channel attribute setting switch 31 functions as a toggle switch. At the time of setting, the on-screen data is read out by the display data memory 36 so as to be displayed on-screen as shown in FIG. The on-screen display is turned off as shown in FIG. When a channel for which ghost removal has been set is input from the channels for which ghost removal has not been set to the key input unit 20, the control unit 33 determines from the connection detection 5 that the connection of the ghost reduction tuner has been detected, and determines the channel attribute. It is determined from the memory 32 that the corresponding channel is set to the ghost removal setting, the on-screen data is read from the display data memory 36 and displayed, and the switch 6 is switched and connected to the GR input terminal 4. This makes it possible to use terrestrial broadcasting from which ghosts have been removed. If the power of the ghost reduction tuner is not turned on, the on-screen display is performed as shown in FIG. 2A, but the broadcast video is not displayed. Therefore, it can be immediately determined that the ghost reduction tuner has a problem. .

Similarly, when a satellite broadcast channel is set, a channel for connecting a pay broadcast descramble decoder can be set by a channel attribute setting switch 31. The content set by the channel attribute setting switch 31 is stored in the channel attribute memory 32 by the control unit 33. In this case, the channel attribute setting switch 31
Functions as a toggle switch. When set, the on-screen data is read out by the display data memory 36 to display on-screen as shown in FIG. 2C, and when released, as shown in FIG. 2B. The on-screen display is turned off. When a channel whose connection has been set from a channel whose descramble decoder has not been set is input to the key input unit 20, the control unit 33 determines from the connection detection 34 that the connection of the ghost reduction tuner has been detected, The channel attribute memory 32 determines that the corresponding channel is set to the descramble decoder, reads and displays on-screen data from the display data memory 36, and switches the switch 35 to the extended input terminal 1.
Switch to 1 side and connect. As a result, it becomes possible to use pay-broadcast satellite broadcasting decoded by the descrambling decoder. If the power of the descrambling decoder is not turned on, the on-screen display is performed as shown in FIG. 2C, but since the broadcast video is not displayed, it can be immediately determined that there is a problem on the descramble decoder side. . When a ghost reduction tuner for removing ghosts and a descrambling decoder for descrambling are not connected to both terrestrial broadcasting and satellite broadcasting, the channel attribute setting switch 31
If the channel setting is not performed in, a terrestrial broadcast screen that is not subjected to ghost processing and a satellite broadcast screen that is not descrambled will be displayed during pay broadcasting using scrambled video.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the ghost-removed video signal from the UV tuner 2, the ghost-removed video signal from the GR input terminal 4, the video signal from the BS tuner 8, and the extended input terminal 11 The control unit 33 controls the video signal from the descramble decoder input from the control unit 33, and the external video signal input to the first external input terminal 14 and the external video signal input to the second external input terminal 15. The second embodiment is the same as the first embodiment except that an input switching unit 37 for performing possible selection switching is newly provided.

The operation of the television receiver configured as described above will be described below.

As shown in FIG. 3, when a request is made by the key input section 20, an arbitrary video signal can be uniquely selected by the input switching section 37 by the control section 33.

First, when a terrestrial broadcasting channel is set, when a ghost-removed channel is input to the key input unit 20 from a channel for which ghost-removal is not set, the control unit 33 reads the corresponding channel from the channel attribute memory 32. It is determined that the channel is set to remove ghost, then it is determined from the connection detection 5 that the connection of the ghost reduction tuner is detected, the on-screen data is read from the display data memory 36 and displayed, and the input is switched. The section 37 is switched to a video signal from the GR input terminal 4. This makes it possible to use terrestrial broadcasting from which ghosts have been removed.

Similarly, when a satellite broadcast channel is set, a channel for connecting a pay broadcast descramble decoder can be set by a channel attribute setting switch 31.

After the connection setting of the pay broadcast decoder is performed, if an arbitrary satellite broadcast channel is selected by the key input unit 20, the control unit 33 determines the attribute of the corresponding channel by the channel attribute memory 32, and If the connection has been set, an arbitrary channel is set to the BS tuner 8 and the connection is detected according to the state of the connection detection 12 so that the input switching unit 37 is switched to the video signal from the extended input terminal 11 when the connection is detected. In this case, the video signal is switched from the BS tuner 8. Similarly, when a channel for which decoder connection is not set is selected, the control unit 33 determines the channel using the channel attribute memory 32, sets a channel for the BS tuner 8, and sets the input switching unit 37 to the BS.
The video signal from the tuner 8 is switched and set.

Other than the above, it is the same as the first embodiment, and the description is omitted.

[0031]

As is apparent from the above embodiment, according to the present invention, the ghost removal channel setting and the descrambling decoder connection channel setting can be performed by the same operation procedure, so that terrestrial broadcasting and satellite broadcasting can be performed. It is possible to obtain an extremely excellent effect that the key can be operated without being conscious.

Also, by using the same key or other switch for the ghost processing channel setting and the descrambling processing connection channel setting, it is possible to always make the key operation meaningful at the time of broadcast reception, thereby improving the operability. An extremely excellent effect that illegal processing can be reduced by software processing can also be obtained.

The descrambling decoder for satellite broadcasting is connected only when necessary, and is set by the internal tuner during non-paid broadcasting, so that the difference between the main unit setting by the key input processing and the decoder setting is improved. Can be obtained.

Furthermore, when a ghost reduction tuner is connected to a ghost reduction tuner and an arbitrary channel is set to ghost removal, the setting is displayed on the screen or the like. In this case, the effect that the cause can be immediately identified by the on-screen display can be obtained even when the image is not displayed only on the channel for which the ghost removal is set.

Furthermore, the same operation procedures for terrestrial broadcasting and satellite broadcasting can simplify the software processing and reduce the program capacity.

According to the second means of the present invention, the UV
The video signal from the tuner, the ghost-processed video signal, the video signal from the BS tuner, the descrambled video signal of pay satellite broadcasting, the video signal from any external device, etc. can be performed by one system of switching means. This makes it possible to realize an extremely excellent television receiver in which the hardware configuration can be made more efficient and the software processing can be made more efficient.

In the conventional example, when the connection of the ghost reduction tuner is detected and the power of the ghost reduction tuner is not input, only the on-screen screen is displayed. It is needless to say that the present invention also includes a case where the signal is switched to the signal side.

Although the channel attribute setting switch is described as being independent, the same effect can be obtained when the key input section has the same function, and it goes without saying that the present invention is included in the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram of a ghost removal compatible satellite broadcast television receiver according to a first embodiment of the present invention.

2A is a display screen when ghost elimination is set, FIG. 2B is a display screen when ghost elimination is canceled, and FIG. 2C is a display screen when a descramble decoder connection is set.

FIG. 3 is a block diagram of a ghost removal compatible satellite broadcast television receiver according to a second embodiment of the present invention;

FIG. 4 is a block diagram of a conventional satellite broadcast television receiver supporting ghost removal.

[Explanation of symbols]

 31 Channel attribute setting switch 32 Channel attribute memory 33 Control unit 34 Connection detection 35 Changeover switch 36 Display data memory 37 Input switching unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-64204 (JP, A) JP-A-4-98992 (JP, A) JP-A-5-68256 (JP, A) JP-A-5-68256 30514 (JP, A) JP-A-4-40764 (JP, A) JP-A-4-48729 (JP, U) JP-A-2-126483 (JP, U) JP-A-4-92888 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 7/10 H04N ^7/ 14-7/173 H04N ^7/ 20-7/22

Claims (3)

(57) [Claims] 1. A satellite broadcast receiving tuner, a video signal input / output terminal compatible with a ghost reduction tuner, a video detection output terminal and a bit stream output terminal compatible with a pay system satellite broadcast, and video and audio signals from a pay broadcast descramble decoder. Having an input terminal, a ghost reduction tuner connection detection means, a switching means for switching between a non-ghost processing video signal and a video signal after ghost removal processing controllable by the control unit, a pay broadcast descramble decoder connection detection means, Switching means for switching between video and audio signals from a satellite broadcast receiving tuner controllable by the control unit and video and audio signals from a descramble decoder, a ghost removal channel setting switch, and a pay broadcast descramble decoder connection channel setting means And ghost elimination and pay broadcast deskra Television receiver having a channel attribute storage means such as a Blu decoder connected. 2. An output signal from a UV tuner for receiving a terrestrial broadcast wave, a video output signal corresponding to a ghost reduction tuner, an output signal from a satellite broadcast reception tuner, and a video from a pay broadcast descramble decoder. 2. The television according to claim 1, further comprising a terminal for inputting an output signal and a plurality of external video input signals, and a switch for selectively outputting one of the received signals by a control unit. Receiving machine. 3. The apparatus has display data for indicating a ghost removal state and a connection of a descramble decoder. When a ghost removal channel is set, it is displayed on-screen that the corresponding channel has been set to ghost removal. 2. The television receiver according to claim 1, wherein when the connection of the scramble decoder is set, the fact that the corresponding channel is set is displayed on-screen.