KR980008907A - How to process channel selection by specifying the Vishal channel map position - Google Patents

Abstract

The present invention relates to a channel setting means of a VISCAL system. In the related art, a user registers a channel of his / her own region in a channel memory through a screen interactive OSD screen and selects a predetermined channel. In particular, When the channel frequency is different, it is difficult to avoid the confusion caused by the movement of the area. In order to solve the conventional problems, the present invention provides a local channel map and a region code key 11 to 18 in the remote control key unit, respectively, in the system memory, and the system has area code keys 11 to 18 The channel selection processing program 100 of the processing task of causing the corresponding local channels to be called from the easement channel map and registering the corresponding local channels in the channel memory if there is a pressing of the V channel Way.

Description

How to process channel selection by specifying the Vishal channel map position

The present invention relates to a Vishal system having tuning means by a frequency synthesizing method, and in particular, in such a system, by registering a channel use environment suitable for each eastern region by a memory map method and selecting a channel by a region-specific code, Thereby ensuring the convenience of use of the system.

The Vishial system is an electronic device commonly used with a TV receiver. A typical circuit block diagram of such a Vishal system is shown in FIG.

A tuner 24 for receiving a regular broadcast signal from a Vishal system antenna 23 and performing channel channel selection work and a phase control loop for controlling a phase-locked loop (PLL) of a channel selection signal provided by the tuner 24 A lock loop circuit 25, a microprocessor 22 for controlling the Vishal system, an OSD circuit 31 for generating an OSD picture, a Vishal system channel memory 32, and a remote control transmitter A key matrix 21 for various key operations, a deck 26 for performing a recording / reproducing deck operation, a configuration including an RF converter 28, a video block 29 for video signal processing, a television receiver 30, .

When recording a TV program or the like on a vial tape in such a conventional vial system, if the recording key is depressed from the key matrix 21, the deck 26 is driven by the control of the servo circuit and recording progresses.

In the conventional system as described above, the channel selecting operation is performed by the tuning means of the frequency synthesizing method according to the second and third aspects. In this case, the timer microcomputer 21 of the system control unit, the tuner 22, (27), the video processor (28), and the like.

The frequency synthesizer (FS) of the frequency synthesizing system adjusts the phase of the frequency to be compared with the phase of the reference frequency (quadrature oscillator (which determines the reference frequency using X-tal) The local oscillation frequency of the desired channel 1 is controlled so as to match the local oscillation frequency.

In this case, if the video signal detected by the pierce unit 47 is input to pin 4 of the video processor (TA 8605N) 48 as shown in the second and third diagrams, Is input to the pin 3 of the synchronous detection eye (LM 567C) of the pie-ear part 47. Then, when it is compared with the reference frequency (f _o = 15734 Hz) of the RC connected to pins 5 and 6, it outputs a signal of logic 0 to the timer microcomputer 41. The timer microcomputer 41 judges whether or not there is a synchronizing signal at the level of this signal (logic 1 or 0) and executes the channel selecting operation. In addition, the timer microcomputer 41 and the PLL icon 43 on the tuner 42 side perform the following operations to select a broadcast station.

That is, the 18-bit data from the timer microcomputer 41 is transmitted to the PICK 43, and the first 4 bits of the 18-bit data input to the PICK 43 are the band selection switch data The upper 9 bits of the next 14 bits are data input to the main counter divider and the lower 5 bits are input to the swallow counter divider to determine the local oscillation frequency.

The 18-bit data value for each channel is stored in the timer microcomputer 41, and this data is valid only when the ENABLE terminal is logic 1.

On the other hand, at the time of channel up 1 and direct tuning, the PLL isochronous 43 receives data, enable and clock signals corresponding to the channels from the timer microcomputer 41 to the PLL iso 43 The data signal is 18-bit serial data, and a binary code corresponding to each channel is stored in the timer microcomputer 41. By the band switch data, One of the three band selection pins becomes a logic 0 and 12 V is input to each input terminal (V _L / V _H / u ) of the tuning circuit 44.

The upper 9 bits of the 14 bits input after 4 bits (Band SW DATA) are input to the main counter of the system and the lower 4 bits are input to the swallow counter to determine the division of the programmable counter .

For example, f r is a frequency obtained by dividing 4 MHz by 512 as a reference frequency, f s is a frequency obtained by dividing a local oscillation frequency inputted as a comparison frequency by 8 x 32 x (M + 3/32), f r is an oscillation frequency (prescater input frequency, local oscillation frequency), f _s divided by the prescaler, programmable counter, etc., the output f o (local oscillation frequency) of the Vottage controlled oscillator, and the reference frequency f r (78125 KHz) Converts the difference to a DC voltage through a DA converter, and applies it to the tuning voltage of the local oscillator 45.

Then, the local oscillation frequency (f o ) changed according to the change of the VT voltage is input to the prescaler again and the phase is compared with f r through the same path. In other words, the loop is continuously looped until f r = f s , the phase is compared and the VT voltage is changed.

When the desired channel is selected, the timer microcomputer 41 outputs 18-bit data corresponding to the channel to the PLL eye 43, and the PLL isochronous 43 outputs the local oscillation frequency of the channel f o ).

50ms after the data is output, the timer microcomputer 41 determines the presence or absence of the SYNC signal and changes the channel selection path as follows.

That is, when data 0 is input to the SYNC terminal of the timer microcomputer 41 after data output, a WINDOW search operation is performed, and when logic 1 is input, a SYNC search operation is performed.

If the synchronous signal is not detected even if the number of steps is increased by 5 steps, the original data is decreased by 5 steps and then the data value is incremented by 5. Then, .

Since the local oscillation frequency changes by f r x 8 (62.5 KHz) every time the data value changes by 1, the local oscillation frequency changes by 62.5 KHz x 5 = 312.5 KHz in one step change.

If a SYNC signal is detected at any step in the SYNC search, the SYNC search operation is stopped and a window search operation is performed. On the other hand, if the SYNC signal is not detected even if all the steps are swept (± 6 step sweep), the timer microcomputer 41 outputs the first output data to the PLL eye 43 as it is (the local oscillation frequency is f o ) to complete the tuning operation.

In the case of the window search, the SYNC signal is detected, and then the data value is incremented (decreased) by one to find the AFT WINDOW.

The change in the local oscillation frequency for one step is 62.5 KHz and the range of the window search is f o ± 1.875 MHz (± 30 step). Increase the data by 1 (increase by 52.5 KHz) until AFT - is detected at SYNC signal detection frequency. Increase by 30 steps (+ 1.875MHz) and then decrease the data by 1 to reduce to fo - 1.875MHz.

The timer microcomputer 41 determines that the AFT + is detected by setting the frequency to be 'a' and the point at which the AFT + is detected by decreasing the frequency to 'b' 1 stem) and outputs the data to the Peltier eye 43 to complete the AFT operation and end the channel selection operation.

At this time, the timer microcomputer 41 sets the AF TV window as follows.

i) Initial output data is in AFT WINDOW

When AFT - is detected by increasing by one step (62.5 KHz), it is decreased by 1 step in reverse. When AFT + is detected, step data immediately before AFT + detection is detected is sent to the PLI-ELISA 43 and the channel selection is completed.

ii) The initial output data is below AFT WINDOW.

In this case, the timer microcomputer 41 determines a logic 0 and decreases it by one step. After detecting the AFT -, the timer microcomputer 41 continues to decrease the value by one step to find AFT +. When AFT + is detected, AFT + The data of the immediately preceding step is sent to the PI ELISA 43 and the selection is completed.

iii) The initial output data is above the AFT WINDOW.

In this case, the timer microcomputer 41 determines that the logic value is 1 and increments by one step. After detecting the AFT +, the timer microcomputer 41 continues to increment by one step. After detecting the AFT - Look for +.

When AFT + is detected, data of the step immediately before AFT + is detected is sent to PLI-ELISA 43 and the channel selection is completed.

If AFT + or AFT - is not detected even if the step is incremented or decremented (f o ± 1.875 MHz), the data (local oscillation frequency = f o ) ) And terminates the channel selection operation.

The AFT operation after completion of channel selection is performed when an AFT output voltage is changed due to an external factor (an external change such as an RF frequency of each channel sent from a broadcasting station is changed), i) the RF frequency is larger than the original channel frequency time; When the AFT voltage input to the timer microcomputer 41 is increased to exceed the AFT WINDOW (1.8124 V), the data value to be sent to the PLL ECU 43 is increased by one step (62.5 KHz). Therefore, since the local oscillation frequency increases, the RF frequency change is compensated, and the AFT voltage enters the WINDOW.

ii) When the RF frequency is smaller than the RF frequency of the original channel, when the AFT voltage input to the timer microcomputer 41 becomes smaller and the AFT WINDOW (1.875 V) is exceeded, Step (62.5 KHz) increases. Therefore, since the local oscillation frequency becomes smaller, the RF frequency change is compensated and the AFT voltage enters the WINDOW.

In this way, the channel selecting operation by the frequency synthesizing method is performed through the above-described operation. In this process, the system microcomputer connected to the timer microcomputer 41 performs the searching operation on the registered channel in the above- And the user finds the selected channel each time the channel is selected and performs a receiving operation.

The channel microcomputer 41 connected to the timer microcomputer 41 stores a predetermined channel together with the channel memory and stores the channel in the channel memory. To perform a channel selection operation.

When the user performs channel alignment through the screen interactive OS screen with the system, the following operations are performed.

Function selection (Sample 1) 1. Clock alignment 2. Scheduled recording / cancellation 3. Channel alignment 4. Tape selection (time remaining on tape) 5. Other functions 1 ~ 5 Selection function selection

If you press 3 in the above,

Channel Fit (Sample 2) Antenna Input: General Broadcast 1. General Broadcast → Wired Broadcast 2. Auto Channel Fit 3. Manual Channel Fit 1 ~ 3 Select Function Select

If you press AUTO SELECT in the above, the number of channel changes continuously from 02 to 69, automatically memorize the channel with broadcasting, and if memorized, select the channel with the lowest number among the stored channels.

(Sample 3) Channel 02 The channel currently being broadcast is automatically memorized. End of function selection

After that, the user can check the memorized channel by pressing the ∧, ∨ buttons on the main body or the remote controller. In this case, the memorized channels are displayed in order.

When manual channel selection is pressed in the above,

(Sample 4) Channel 02 memory 02 ~ 69 Channel ◀ / ▶ Erase / Memory function selection End

When the user presses a number button and performs a numeric press of 0,7 (channel 07) or the like, an indication "MEMORY" is displayed on the screen, and then a confirmation process is performed.

However, in the conventional system as described above, the user has to perform the task of memorizing the channel number which the user has memorized through the screen interactive OS screen, It is inconvenient that the above-mentioned operation must be performed every time when the reception channel frequency is different, such as the area, the Daejeon area, the Gwangju area, and the performance area.

For example, the broadcasts received in the Seoul area are channels 6, 7, 9, 11, 13, and 34, and the channels received in the Busan area are 42, 10, 11, 8, 26, and 50, Since the frequencies form channels for receiving different frequencies such as channels 6, 7, 9, and 22, the user has difficulty avoiding the troublesome operation of registering a channel that the user knows about the set in the same manner as described above.

It is an object of the present invention to provide a system and method for providing a channel map for a broadcast reception channel of a geographical region in order to solve the above problems, So that the easiness of using the system can be securely secured.

In order to realize the object of the present invention, in particular, the system memory is provided with an easement channel map and a region code key provided in the remote control key unit, and if there is a pressing of the area code key of the user in the system, And a channel selection processing program for specifying a channel map position of a Vishal which is performed by a channel selection processing program of a processing task for calling up corresponding local channels and registering the corresponding local channels in the channel memory.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 1 is a circuit block diagram of a typical VCR (Video Cassette Recorder) system.

2 is a reference diagram showing an excerpt of a frequency synthesizing channel selector associated with 1;

FIG. 3 is a reference diagram for understanding the synchronizing signal detecting operation in FIG.

FIG. 4 is a reference diagram showing the remote control key unit of the present invention. FIG.

FIG. 5 is an example of a channel selection processing program of the present invention. FIG.

DESCRIPTION OF REFERENCE NUMERALS

1: Channel selection key block 11 to 18: Area code key

100: Channel selection processing program

That is, FIG. 4 shows the configuration of the channel selection key unit 1 provided in the remote control key unit according to the present invention.

Here, the area code key 11 for the Seoul area, the area code key 12 for the Busan area, the area code keys 13 to 18 for the Daegu area, Daejeon area, Gwangju area, Gangneung area, Incheon area, ) Are arranged radially.

The local channel map on the system memory side corresponding to the area code keys 11 to 18 can be configured as follows, for example.

turn area channel Code number One Seoul 6,7,9,11,13,34 One 2 Busan 42,10,11,8,26,50 10 3 Dae-gu 45,7 11 4 Daejeon 6,7,9,22 100 5 Gwangju 37,11,8 101 6 Gangneung . 110 7 Incheon . 111 8 Jeju . 0

The channel selection processing program 100 related to the geographical channel map and the channel selection key unit 1 as described above is shown in FIG. 5 as described above.

Here, if there is a broadcast signal input (step 101), the flow advances to the channel automatic selection mode (step 102), 9 is selected (step 103), and automatic sorting is performed if the selected channel is selected (step 105).

Then, it is checked whether or not there is an input of the area code keys 11 to 18 (step 106), and it is checked whether the operation is finished by performing sorting on the local channel (step 107) 108).

Then, if the channel priority is 1, it is determined that the channel priority is 1, and if the channel priority is 1, VL is changed from VH to VH to UHF (step 111). If the channel priority is 2, KBS1 is changed to KBS2 to MBC (step 110) (Step 112) and finally storing these pieces of information (step 113).

It is obvious that the channel selection processing program 100 shows only one example, and the contents related to the channel sorting are not limited thereto.

When the user registers the channel in the Vishal system according to the region, if the user presses one of the corresponding region code keys 11 to 18 of the zone selection key 1 as shown in FIG. 4, The local channel map automatically registered in the channel memory is fetched and the registration operation is performed.

In this case, when the user selects 11, the system automatically selects broadcast channels 6, 7, 9, 11, 13, and 34 received from the Seoul area and registers them in the channel memory. When the user selects 12, The channels 6, 7, 9, 22, and the like are automatically set to the broadcast frequencies received in the competition area when 13 is pressed.

This operation is performed together with the channel selection processing program 100 of the fifth aspect. In this case, if there is a broadcast signal input, the system goes to the automatic channel selection mode, checks whether the selected channel is selected, (Steps 101 to 103, 105).

If it is checked whether there is an input of the area code keys 11 to 18, a sorting operation is performed on the corresponding local channel to check whether the operation is completed, and a channel comparison operation is performed (steps 106 to 108).

If the channel priority is 1, it is sorted from VL? VH? UHF to 1, from KBS1? KBS2? MBC to 2, from 3 to MBC? SBS? KBS2, and finally the information is stored (Steps 109 to 113).

Since the present invention can automatically set the channel for each region in the process of setting the channel in the vial system, even if the user does not register the channel corresponding to each region automatically, So that the convenience of using such a system can be satisfactorily secured.

Claims (1)

In the method for processing a channel setting of a VISCAL system, the system memory is provided with an easel region channel map and a region code key (11 to 18) in the remote controller key section, respectively, Is performed by the channel selection processing program (100) of the processing task of causing the corresponding local channels to be called from the local area channel map and being registered in the channel memory if there is a pressing of the channel selection map . ※ Note: It is disclosed by the contents of the first application.