KR19990026333A - Tuning method using VSI's V tuner - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning method using a BC tuner (VS) tuner. In the related art, a system microcomputer provides feeder PWM (PWM) data to an integrating circuit and the output of the integrating circuit is applied to the tuner, thereby increasing the tuning voltage. While tuning is performed by changing V from 0 to 32V, this may cause the harmonic signal or broadcast sound carrier to be incorrectly recognized as a broadcast signal, thereby reducing the tuning speed.

According to the present invention, in order to solve such a problem in the related art, the system memory stores up to 2 channels of feedable UM data in advance and extracts subchannel data from the memory in the auto search mode (steps 101 and 102); Converting the extracted data into a feedable U signal and transmitting it to the integrating circuit and the tuner (steps 103 and 104); and checking whether the channel is the highest channel now or repeating the above process and returning the highest channel (step 105). And if it is not in the auto search mode, checking whether manual search is performed, and if it is manual search, extracting user-selected channel data, converting it into a feedable U signal, and transmitting it to the tuner (steps 106 to 109). The present invention provides a tuning method using VSI tuner.

Description

Tuning method using VSI's V tuner

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning method using a VS tuner in a VSI system having a VS tuning means. In particular, the present invention relates to an automatic search or manual search after storing FME data of all channels used in such a system in a memory. In this system, it is possible to guarantee the speed of tuning in such a system by allowing the tuning operation using the fixed UEM fixed data stored in the memory.

A general VSI system is an electronic device having a recording / playback function that is widely used with a TV receiver, and a conventional circuit having an OSD function in such a VSI system is shown in a block diagram as shown in FIG. 1.

Here, a tuner 34 for receiving a regular broadcast signal from an antenna 33 of a VSI system and performing channel tuning, and a phase for controlling a phase locked loop (PLL) of the tuning signal provided from the tuner 34. The lock loop circuit 35, the microprocessor 32 for controlling the VSI system, the OSD circuit 41 for generating the OSD screen, and the like are included.

In addition, the VSI system includes a system memory 42, a deck unit 36 for performing a recording / playback deck operation, a timer unit 31 for performing a clock, a channel reservation function, an RF converter 38, The video processing circuit 39 of the video signal processing, the external TV receiver unit 40, and the like are configured.

For reference, in such a system, the reserved recording function using the OSD function is conventionally called and used as the following OSD function menu screen.

Function Selection 1. Custom Clock 2. Reservation recording / cancellation 3. Channel Customization 4. Tape Selection (Tape Remaining Time) 5. Other Functions 1 to 5 Selection End of Function Selection

In the OS method as described above, when the user selects each item, another OS screen is displayed in sequence so that the user can set and select various contents in a screen interactive manner.

In the related art, various methods of tuning a predetermined channel with the tuner 34 are known. Among them, a system circuit related to a VS tuning method is shown as shown in FIG.

Here, the microcomputer 22 of the system control and the feeder U signal are received from the microcomputer 22 and integrated to provide the integrating circuit 23 and the output of the integrating circuit 23 at a constant DC voltage level. And a tuner 34 for tuning the predetermined channel frequency by varying the capacitance of the varactor diode, a band selection switch 24, and the like.

In the case of VTS tuning, in case of auto search, the microcomputer 22 searches for broadcast while gradually increasing the tuning voltage value. If such harmonic signal or sound carrier is incorrectly recognized as a broadcast signal, the current search is performed. The channel search operation is slowed down due to problems such as re-searching the channel because the channel signal is not caught.

SUMMARY OF THE INVENTION An object of the present invention is to unnecessarily store all broadcasts in the memory as feedable U channel data in advance and then transmit the feedable U signal data corresponding to the channel to the integrating circuit so as to improve the conventional problems as described above. Channel search can be performed unaffected by harmonic signals, audio carriers, etc., enabling fast tuning in these systems.

According to the present invention, in order to realize the object of the above example, the system memory stores two to sixty-nine pieces of feedthrough data in advance and extracts lower channel data from the memory in the auto search mode. Converting to a feedable U signal and transmitting to an integrating circuit and a tuner; checking whether the channel is the highest channel or not, repeating the above procedure and returning the highest channel; and in the case of the non-auto search mode, manual search If the authorization is checked and the manual search is performed, the tuning method using VSI tuner including the step of extracting the user-selected channel data, converting it into a feedable U signal, and transmitting it to the tuner is characteristic.

Hereinafter, more specific features of the present invention will be understood by describing the same in detail with the accompanying drawings.

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

2 is a reference diagram showing an excerpt of the tuning system circuit of FIG.

3 is a system circuit block diagram of the present invention.

4 is an embodiment of a feedable UEM tuning control program according to the present invention;

* Explanation of symbols for main parts of the drawings

11.Microcomputer 12. Memory

13. Integrating circuit 14. Tuner

100. FDM Tuning Control Program

Figure 3 shows a system circuit block of a VSI system related to a tuning method using a V tuner according to the present invention.

Here, the microcomputer 11 of the system control and the feeder U signal are received from the microcomputer 11 and integrated to provide the integrated circuit 13 and the output of the integrated circuit 13 at a constant DC voltage level. And a tuner 14 for tuning the predetermined channel frequency by varying the capacitance of the varactor diode, and a memory 12 for storing feeder U data for all channel signals in the system.

Further, the system is equipped with a feeder Uem tuning control program 100 as shown in FIG.

In this case, if the system is in the auto search mode, the step of extracting the lower channel data from the memory (steps 101 and 102), converting the extracted data into a feedable U signal and transmitting it to the integrating circuit and the tuner (steps 103 and 104), and the channel now Check whether the channel is the highest channel or repeat the above process and return if the channel is the highest channel (step 105), and if it is not in the auto search mode, check whether it is a manual search and retrieve the user-selected channel data when the manual search is performed. And then converting it into a feedable U signal and transmitting it to the tuner (steps 106 to 109).

According to the present invention having the above configuration, as shown in FIG. 3, when the user selects the auto search mode through the key input unit, the microcomputer 11 provides the FEM data to the integrating circuit 13 from the lower channel to the upper channel for all channels. The integrating circuit 13 integrates the digital data value and converts the digital data value into a DC voltage, and then provides a DC value for a predetermined channel to the tuning voltage terminal of the tuner 14.

In addition, the feeder UEM data provided to the integrating circuit 13 by the microcomputer 12 changes the feeder U digital data corresponding to all channels registered in the memory 12 from the lowest channel to the highest channel at the time of auto search. Will be provided.

In addition, since the microcomputer 11 may transmit a frequency deviating from the original RF frequency during the actual broadcasting, the value output to the integrating circuit 13 may vary within an upper / lower predetermined range to receive an optimal broadcasting signal. To control.

In addition, during manual search, the feedable UM data corresponding to the channel immediately above or below the channel is generated and sent to the integrating circuit 13 based on the feeder U channel data of the current position.

Therefore, since the microcomputer 11 can gradually tune the tuning voltage linearly as in the prior art and perform channel tuning based on the channel data value already set without tuning, the speed of the channel tuning can be ensured.

Meanwhile, the above operation is performed by the microcomputer 11 together with the FDM tuning control program 100 as shown in FIG. 4, in which the lower channel data is fetched from the memory when the system is in the auto search mode. The extracted data is converted into a feeder U signal and transmitted to the integrating circuit and the tuner (steps 101 to 104).

In the above, check whether the channel is the highest channel or repeat the above process and return if it is the highest channel, if it is not in the auto search mode, check if it is a manual search, and if it is a manual search, the user-selected channel data is fetched. It is converted into a WMU signal and transmitted to the tuner (steps 105 to 109).

In the present invention, the channel tuning operation is performed in the system by performing the channel tuning operation using the FDM data corresponding to each channel previously registered in the memory at the time of auto search or manual search in the V-system of the V tuning method. It is possible to ensure the promptness of.

Claims (1)

In the BS system of the BD system including a system microcomputer, a memory, an integrating circuit, a tuner, and the like, the system memory stores up to 2 to 69 channels of fedUMM data in advance. Extracting the lower channel data (steps 101 and 102), converting the extracted data into a feeder U signal and transmitting it to an integrating circuit and a tuner (103, 104); Repeating and returning if it is the highest channel (105), and if it is not in the auto search mode, checking whether manual search is performed, and if the manual search is performed, user-selected channel data is fetched and then converted into a feedable U signal and transmitted to the tuner. V of V'Sial, comprising steps 106 to 109 and the like. S) Tuning method using tuner