KR19990043039A - Television receiver with search channel rearrangement using sub picture - Google Patents

Abstract

The present invention relates to a television receiver having a search channel rearrangement function using a sub-screen which allows a user to rearrange channel information searched by a channel automatic search function using a sub picture (PIP) function. A television receiver comprising a first tuner 122 for tuning and a second tuner 132 for tuning sub-channels; A second synchronization signal detector 43 for separating and detecting a synchronization signal from the composite video signal of the sub-screen image tuned by the second tuner 132, and the synchronization signal detection by the second synchronization signal detector 43; A search channel storage unit 44 for determining a regular broadcast channel according to whether or not and storing channel data determined as a regular broadcast channel, a key input unit 40 for selecting a search channel rearrangement function, and a predetermined guide for rearranging the search channel OSD pattern storage unit 46 for storing the subtitle OSD pattern information, OSD generation unit for outputting the search channel rearrangement guide screen according to a predetermined control command based on the data stored in the OSD pattern storage unit 46 47, and when the automatic channel search is selected, the second tuner 132 is controlled to execute channel search, and when the channel search is completed, the OSD generation unit 47 is controlled to output the OSD guide screen. , When both channel numbers are selected And a control unit 45 that controls the searched channel to be rearranged to the order reset by the user by changing the address of the search channel information stored in the search channel storage 44.

Description

Television receiver with search channel rearrangement using sub picture

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-tuner television receiver equipped with a sub picture function. In particular, the channel information retrieved by the channel auto search function can be rearranged using a sub picture (PIP) function. A television receiver having a search channel rearrangement function.

Recently, as the functions of a television receiver (hereinafter, referred to as a TV receiver) are gradually diversified and advanced, the user checks the screen state by turning a channel one by one to check a channel where a broadcast signal is received. TV receivers have been developed and distributed to automatically search for broadcast channels in a frequency band.

Fig. 1 is a block diagram showing a schematic configuration of a television receiver having a broadcast channel automatic search function as described above, wherein reference numeral 1 is an antenna for receiving an airwave broadcasting signal, and 2 is received through this antenna 1. The tuner 2 tunes a signal of a broadcast channel selected by the user among the broadcast signals, and the tuner 2 is provided from an RF amplifier 2a for amplifying the received RF signal and from the RF amplifier 2a. The mixer 2b generates an intermediate frequency signal (IF signal) by mixing the RF signal and the oscillation frequency from the local oscillation circuit 2c, and an adder 2c to be described later.

Further, reference numeral 4 is an IF amplifier section for amplifying the IF signal output from the mixer 2b, and 5 is an image intermediate frequency signal PIF and an audio intermediate frequency from the IF signal output from the IF amplifier section 4; A P / S separation unit configured to separate a signal SIF, for example, a surface acoustic wave filter, etc., 6 is an audio detector for detecting an audio signal from the SIF signal, and 7 is an image detector for detecting an image signal from the PIF signal. .

Further, reference numeral 8 denotes a remote control unit for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 9 denotes a receiving unit for converting an infrared signal from the remote control unit 8 into an electric code signal, 10 Denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor that controls the entire apparatus in accordance with a remote controller signal from the remote controller 8.

Reference numeral 12 denotes a PWM generator for generating a predetermined Pulse Width Modulation (PWM) signal according to the control signal from the microprocessor 11, and 13 denotes an output from the PWM generator 12. An integrated circuit for integrating a PWM signal to generate a predetermined level signal. When the viewer selects a predetermined channel using the remote controller 8, the microprocessor 11 receives channel data corresponding to the channel selected by the viewer. By reading from the channel memory 10 and controlling the PWM generator 12 based on this, a predetermined PWM signal is generated. The PWM signal is then transmitted to the channel selected by the viewer through the integrating circuit 13. It is output as a corresponding voltage control signal.

Subsequently, reference numeral 14 denotes an Automatic Fine Tunning (AFT) circuit provided for precise tuning operation, and 2c represents a voltage signal applied from the integrating circuit 13 and the AFT circuit 14. An adder for adding the output voltage signal, 2d is a local oscillation circuit, which generates a predetermined frequency signal according to the level of the voltage signal applied through the adder 2c and outputs it to the mixer 2b to execute a broadcast station. Done.

Meanwhile, in the local oscillation circuit 2d, the local oscillation frequency outputted is changed according to a change in ambient temperature or time elapses. When the local oscillation frequency is changed in this way, the intermediate frequency output from the mixer 2b is changed. As a result, stable image reproduction becomes impossible.

The AFT circuit 14 is provided to solve the above problem, which is the variation of the intermediate frequency ( Δ By outputting the voltage signal (± V) for f) to the adder 2c, the local oscillation frequency output from the local oscillation circuit 2d is stabilized.

In addition, in the TV receiver, the magnitude of the input signal received through the antenna 1 is changed due to the strength or fluctuation of the reception signal, and reference numeral 17 denotes an image signal detected by the image detector 7. AGC (Automatic Gain Control) for constantly controlling the output level of the image signal from the image detector 7 by controlling the amplification degree of the above-described RF amplifier 2a and IF amplifier 4 based on the level of? Control) circuit.

Although reference numeral 18 is not shown with respect to the audio signal output from the P / S separation unit 5, bass, treble, and volume (in accordance with a control signal from the microprocessor 11) are not shown. A voice processing unit for executing a voice processing such as a volume), and 19 denotes a voice amplifier for amplifying and outputting the voice signal processed by the voice processing unit 18 to the speaker 20.

Reference numeral 21 denotes a color, tint, brightness, etc. according to a control signal from the microprocessor 11 with respect to the image signal output from the P / S separation unit 5. Is an image processing unit which outputs R (Red), G (Green), and B (Blue) signals corresponding to the image signal, and 22 denotes a CRT 23 based on the RGB signal output from the image processing unit 21. CRT driving unit for driving the.

That is, in the device having the above-described configuration, when the viewer executes the broadcasting station through the remote control device 8, the microprocessor 11 drives the PWM generator 12 to control the video and audio of the corresponding channel. Each signal is processed and output through the CRT 23 and the speaker 20. When the user presses an automatic channel search selection key installed in a remote control device or the like as required, the synchronization detection by the synchronization signal detection unit 24 is performed. On the basis of whether the channel is automatically searched for a broadcast signal.

On the other hand, when the above-mentioned automatic channel selection is executed, it is sometimes found that broadcast channels are not sequentially arranged or duplicately searched due to signal interference or ghost phenomenon. A function has been developed to rearrange these search channels sequentially.

However, when the search channel rearrangement function is executed in a conventional television receiver configured with a single tuner, the TV viewing is obstructed until the channel rearrangement is completed, so watching TV during the rearrangement operation is performed. The problem is that it is difficult to do.

Therefore, when the search channel rearrangement operation can be executed by using the sub-screen function provided by the 2-tuner TV, the rearrangement function can be normally executed without disturbing the broadcast viewing.

The present invention was created in view of the above circumstances, and the channel retrieval function using the sub picture which enables the user to rearrange the channel information retrieved by the channel auto search function using the sub picture (PIP) function is provided. The purpose is to provide a television receiver equipped.

1 is a view for explaining a conventional channel automatic search function.

Figure 2 is a block diagram showing the main configuration of a television receiver equipped with a search channel rearrangement function using a sub-screen according to an embodiment of the present invention.

3 is a diagram illustrating a guide screen output state of a search channel rearrangement function.

*** Explanation of symbols for main parts of drawing ***

1: antenna 8,40: remote control device

9,41 receiver 11,45 microprocessor

21,111: image processor 22,112: CRT driver

23,113: CRT 120: switching unit

122: first tuner 123: first IF amplifier

124: first P / S separation unit 125: first video signal detector

126: first voice signal detector 127: second voice processor

128: first voice processing unit 19,129: voice amplifier

20,130: Speaker 131: PIP processing unit

132: second tuner 133: second IF amplifier

134: second P / S separation unit 135: second video signal detector

136: second voice signal detector 42: channel memory

43: second synchronization signal detection unit 44: search channel storage unit

46: OSD pattern storage unit 47: OSD generation unit

A television receiver having a search channel rearrangement function using a sub-screen according to the present invention for realizing the above object includes a first tuner 122 for main screen channel tuning and a second tuner 132 for sub-screen channel tuning. In the equipped television receiver; A second synchronization signal detector 43 for separating and detecting a synchronization signal from the composite video signal of the sub-screen image tuned by the second tuner 132, and the synchronization signal detection by the second synchronization signal detector 43; A search channel storage unit 44 for determining a regular broadcast channel according to whether or not and storing channel data determined as a regular broadcast channel, a key input unit 40 for selecting a search channel rearrangement function, and a predetermined guide for rearranging the search channel OSD pattern storage unit 46 for storing the subtitle OSD pattern information, OSD generation unit for outputting the search channel rearrangement guide screen according to a predetermined control command based on the data stored in the OSD pattern storage unit 46 47, and when the automatic channel search is selected, the second tuner 132 is controlled to execute channel search, and when the channel search is completed, the OSD generator 47 controls the search result and the search channel. O to guide rearrangement A channel searched by changing the address of the search channel information stored in the search channel storage unit 44 when outputting an SD guide screen and selecting two channel numbers whose order must be reversed through the key input units 40 and 41. It is characterized in that it comprises a control unit 45 for controlling to be rearranged in the order of resetting by the user.

That is, according to the present invention having the above-described configuration, the search channel rearrangement function can be executed using the sub-screen for the channel searched by the channel automatic search function, so that the channel rearrangement function can be executed normally without disturbing the TV viewing. It becomes possible.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

2 is a block diagram showing the main configuration of a television receiver equipped with a search channel rearrangement function using a sub-screen according to an embodiment of the present invention.

In FIG. 2, reference numeral 122 denotes a first tuner (TUNER) for main picture channel selection, 123 denotes a first IF amplifier for amplifying an intermediate frequency (IF) signal output from the first tuner 122, and 124 denotes a first tuner. First P / S separation, for example, comprising a surface acoustic wave filter (SAW FILTER) for separating the IF signal output from the first IF amplifier 123 into an image intermediate frequency signal PIF and an audio intermediate frequency signal SIF, respectively. 125 is a first video signal detector for detecting a video signal from the video intermediate frequency signal PIF1 separated by the first P / S separator 124, and 126 is a first P / S separator. A first voice signal detector for detecting a voice signal from the voice intermediate frequency signal SIF1 outputted separately from the unit 124.

Reference numeral 132 denotes a second tuner for picture in picture channel selection, and 133 denotes a second IF amplifier for amplifying the intermediate frequency signal output from the second tuner 132. For example, the surface acoustic wave is separated from the IF signal output from the second IF amplifier 133 into a video intermediate frequency signal PIF and an audio intermediate frequency signal SIF, respectively. The second P / S separators 135 and 136 made of a filter detect the video signals from the video / audio intermediate frequency signals PIF2 and SIF2 separated and output from the second P / S separator 134, respectively. 2 is a video signal detector and a second audio signal detector for detecting an audio signal.

In addition, reference numeral 40 is a remote control device having a search channel rearrangement function key, 41 is a receiving unit for receiving an infrared signal transmitted from the remote control device 40 and converting it into an electrical signal, and 45 is a receiving unit ( And a microprocessor as a control unit which executes a control operation of the entire apparatus including the search channel rearrangement function in accordance with the contracted code signal outputted from 41).

Reference numeral 120 denotes a composite video signal output from the first and second video signal detectors 125 and 135 and the first and second audio signal detectors according to a predetermined control signal from the microprocessor 45. A switching unit for selectively switching the audio signal output from the (126, 136), respectively, reference numeral 128 is to process the audio signal for the main screen output from the switching unit 120 under the control of the microprocessor 45 The first audio processing unit 129 is an audio amplifying unit for amplifying the audio signal processed by the first audio processing unit 128 and outputting it to the speaker 130 connected to the rear stage, and 127 is a unit output from the switching unit 120. The second audio processing unit processes a sound signal for a screen and outputs it through a headphone jack (not shown) installed in the TV main body.

On the other hand, reference numeral 131 receives a video signal that is selected and output as the sub-screen video signal from the switching unit 120 and a subtitle video signal applied from the OSD generator 47 to be described later to generate a sub-screen based on this R ', G', B '(Red, Green, Blue) and a blanking signal (Y') PIP processing unit for outputting, 111 is the main composite image signal output from the switching unit 120 And outputs R, G, B, and luminance signals Y for main and sub picture output based on R ', G', B 'and blanking signals Y' output from the PIP processing unit 131. The image processing unit 112 is a CRT driving unit that drives the CRT 13 based on the R, G, B and luminance signals Y output from the image processing unit 111.

In addition, reference numeral 42 is a channel memory for storing channel tuning data for a broadcasting channel, and 43 is for separating and detecting a synchronization signal from a composite video signal of a sub-screen video output from the second video signal detector 135. The second sync signal detector 44 is a search channel storage for storing channel data of the normal broadcast channel searched based on whether the sync signal is detected.

Reference numeral 46 denotes an OSD pattern storage unit which stores OSD pattern information of a predetermined subtitle for reordering search channels, and 47 denotes the microprocessor based on data stored in the OSD pattern storage unit 46. The OSD generator outputs the search channel rearrangement guide screen as a sub-screen according to the control of (45).

Next, the operation of the device having the above configuration will be described.

When the user selects a predetermined function key (not shown) provided in the remote control device 40 while watching TV, the microprocessor 45 controls the switching unit 120 and the PIP processing unit 131 to display the sub-screen output mode. At the same time, the second tuner 132 is controlled based on the tuning data stored in the channel memory 42 to sequentially perform channel search from the low frequency broadcast frequency.

In this case, the second synchronization signal detector 43 detects the synchronization signal from the composite video signal output from the second video signal detector 135. For example, the second synchronization signal detector 43 detects a high level whenever the synchronization signal is detected. The signal is output to the microprocessor 45.

Whenever a high level detection signal is applied from the second synchronizing signal detector 43, the microprocessor 45 registers and tunes presetting data of the channel currently tuned in the search channel storage 44. When the process is completed, the tuning frequency is gradually adjusted upward, and the search operation for the remaining signal broadcasting channel is continued.

On the other hand, while the channel signal is in progress, the signal-signaling channel searched every second through the sub-screen is intermittently output, so that the user can check the progress of the channel search at that time.

Then, when the channel search operation is completed, the microprocessor 45 releases the sub-screen output mode and searches the search results and the search results to the OSD generator 47 based on the data registered in the search channel storage 44. Since a predetermined control signal for channel rearrangement is output, the OSD generator 47 reads data stored in the OSD pattern storage 46 according to a control signal applied from the microprocessor 45. The image processor 11 outputs predetermined color tone signals R, G, and B and a blanking signal Y 'for outputting a subtitle. As a result, a predetermined guide screen for guiding the channel search result and the search channel rearrangement function is output through the CRT 113 screen as illustrated in FIG. 3, thereby allowing the user to confirm the search result and the duplicate search channel. And whether to intentionally rearrange the search channel due to the ghost phenomenon.

On the other hand, when the user manipulates the numeric keys provided in the remote control device 40, and inputs two channel numbers (for example, CH6 and CH60) to be reversed, the microprocessor 45 stores the search channel. By changing the address of the search channel information stored in the section 44, the information is rearranged in the order of resetting by the user.

That is, according to the above embodiment, a television receiver having a search channel rearrangement function using a sub-screen which enables a user to rearrange channel information searched by the channel automatic search function using a sub picture (PIP) function can be realized. Will be.

On the other hand, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the technical gist of the present invention.

As described above, according to the present invention, the search channel rearrangement function can be executed using the sub-screen for the channel searched by the channel automatic search function, so that the channel rearrangement function can be normally executed without disturbing TV viewing. do.

Claims (1)

A television receiver having a first tuner 122 for main picture channel tuning and a second tuner 132 for sub picture channel tuning; A second sync signal detector 43 for separating and detecting a sync signal from the composite video signal of the sub-screen video tuned by the second tuner 132; A retrieval channel storage section 44 for judging a regular broadcast channel according to whether or not the second synchronization signal detection section 43 detects the synchronization signal, and storing channel data determined as the normal broadcast channel; A key input unit 40 for selecting a search channel rearrangement function, OSD pattern storage unit 46 for storing the OSD pattern information of the predetermined guide subtitle for the search channel rearrangement guide, An OSD generator (47) for outputting a search channel rearrangement guide screen according to a predetermined control command based on the data stored in the OSD pattern storage unit (46), and When the automatic channel search is selected, the second tuner 132 is controlled to execute the channel search, and when the channel search is completed, the OSD generator 47 is controlled to guide the search result and the search channel rearrangement function. Outputs an OSD guide screen, and when two channel numbers whose order are to be reversed are selected through the key input unit 40, 41, the searched by changing the address of the search channel information stored in the search channel storage unit 44 Television receiver having a search channel rearrangement function using a sub-screen, characterized in that it comprises a control unit 45 for controlling the channel to be rearranged by the user reset order.