KR0164707B1 - Autoamtic channeling method and the device of vcr - Google Patents

Abstract

The present invention relates to an apparatus and method for automatically setting a channel in a video cassette recorder, comprising: an antenna unit (100) and a antenna unit (100) configured to receive a broadcast program frequency propagated from an external space, which is composed of a general antenna; Amplifies the demodulation and tuning circuit 200 for converting the received broadcast program signal into an intermediate frequency IF and selects and outputs the necessary information, and then outputs the broadcast program signal selected and output from the demodulation and tuning circuit 200. And a video / audio signal processor 300 for processing each signal into a video and audio signal after detecting the detected signal, an on-screen display circuit 400 for outputting or displaying a character on a screen of a television and informing the user of various information; On-screen display while controlling the operation of the demodulation and tuning circuit 200 and the video / audio signal processor 300 It is composed of a central microprocessor 500 for exchanging data with the furnace 400 to turn on channel information on a menu screen and to select inputs and outputs with respective videos.

Description

Automatic channel setting device and method of video cassette recorder

1 is a block diagram of an automatic channel setting apparatus of a video cassette recorder according to the present invention.

2 is a flowchart for explaining the operation of the automatic channel setting apparatus of the video cassette recorder according to the present invention.

* Explanation of symbols for main parts of the drawings

100: antenna 200: demodulation and tuning circuit

300: video / audio signal processing unit 400: on-screen display circuit

500: central microprocessor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for automatically setting a channel in a video cassette recorder, and more particularly, when a number of available televisions that can be watched by cable television and satellite broadcasting reaches dozens of channels, and a specified frequency is searched. The present invention relates to an automatic channel setting apparatus and method for starting a search in a band and continuously searching a channel at a predetermined time interval.

In general, when searching for a channel to select a channel, not only one channel but several channels are searched at once. In this case, in order to search for multiple channels, the television or video cassette recorder searches for channels of the television by keying in the channel number of the television by using the key buttons on the remote control or the buttons on the television main body. Displayed via However, as described above, when a channel number of a television is inputted by using a key button of a remote control or a button of a television main body to search a channel of a television, it is time consuming and cannot immediately search for a desired program. If you do not know the channel number of the desired program of the television can not be searched.

Therefore, in order to solve the above-mentioned problems, it is known that channels are automatically selected one by one using the channel selection button of the television remote control. In the above known technology, the channel number of the television is inputted by using the key button of the remote control or the button of the television main unit to search the channels of the television, instead of shifting the channels one by one using the channel selection button of the television remote control. Select the channel of the television. Therefore, even if the channel number of the desired television is not known, the desired television program can be searched.

Referring to the known technology as described above are as follows. First, the user presses or keeps pressing the channel select button of the television remote control to select a channel of another television while watching television.

According to the signal of the channel selection button of the television remote control, the channel of the television is changed to a higher channel by one channel and displayed on the screen. If the user continuously presses or keeps pressing the channel selector button of the television remote control to select a channel of another television while watching television, the channel of the television continues according to the signal of the channel selector button of the television remote control within a certain time. This channel is continuously changed to the higher channel one by one and displayed on the screen. When the user selects a channel of another television desired by the user and stops pressing the channel selection button of the television remote control, the change of the channel is stopped to maintain the channel state of the same television. Therefore, the user can select and watch a channel of a desired television.

However, in the known technology of searching for a desired channel of a television by shifting channels one by one using the channel selection button of the television remote control as described above, the frequency band is large because the number of channels is large when the video cassette recorder or the television apparatus selects or searches for a channel. Search sequentially by star. When the channel is automatically tuned by the conventional apparatus as described above, the broadcast program is tuned by searching for each VL + VH + UHF band. That is, the routine first searches for the low frequency band of the VHF frequency band first, then searches the high frequency band of the VHF frequency band, and finally the UHF band. Therefore, in the case of automatic tuning in the video cassette recorder, regardless of the band currently designated by the user, the conventional technology unconditionally searches the low frequency band among the VHF frequency bands first and then the high frequency band among the VHF frequency bands. Since the channel is selected along the routine for searching the UHF band, it is relatively time consuming in channel selection. In addition, when the user selects the channel manually, the search is stopped when the selected channel is searched.

Accordingly, an object of the present invention is to provide an automatic channel setting apparatus capable of continuously searching channels at a specified time interval by starting a search in a designated frequency band without using a routine of VL + VH + UHF when searching channels of an entire television. To provide a way.

In order to achieve the above object, the apparatus of the present invention comprises an antenna unit configured to receive a broadcast program frequency propagated from an external space, which is composed of a general antenna, and converts the broadcast program signal received from the antenna unit into an intermediate frequency (IF). A demodulation and tuning circuit for selecting and outputting necessary information, an image / audio signal processor for amplifying and detecting a broadcast program signal selected and output from the demodulation and tuning circuit and processing each signal as a video and audio signal; On-screen display circuit for displaying or displaying characters on the screen of the television to inform the user of various information, controlling the operation of the demodulation and tuning circuit and the video / audio signal processing unit, and exchanging data with the on-screen display circuit. Turn on the information on the menu screen and each video It features a central microprocessor that allows input and output selection to and from.

In addition, the method of the present invention for achieving the above object, the step of instructing the channel selection of the video cassette recorder using a remote control, determining whether to select the channel selection automatically or manually, if the channel selection automatically Selecting a band, searching by band regardless of the presence of a signal, starting searching by band from the selected or specified band, storing the channel where the signal is present in memory, and manually selecting the channel Starting with the channel selection band and searching for the existence of the signal, storing the channel in which the signal exists in the memory, asking whether to check the channel information, and displaying the channel information through the on-screen display circuit. Characterized in that configured.

Hereinafter, a preferred embodiment of an automatic channel setting apparatus and method of a video cassette recorder according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an automatic channel setting apparatus of a video cassette recorder according to the present invention, which is composed of a general antenna and receives from the antenna unit 100 and the antenna unit 100 for receiving a broadcast program frequency propagated from an external space. Amplifying the broadcast program signal selected from the demodulation and tuning circuit 200, the demodulation and tuning circuit 200, and outputting the necessary information by converting the broadcast program signal into an intermediate frequency IF. After detection, the video / audio signal processor 300 for processing each signal into a video and audio signal, an on-screen display circuit 400 for outputting or displaying a character on a screen of a television to inform the user of various information, and the Control the operation of the demodulation and tuning circuit 200 and the video / audio signal processing unit 300 and the on-screen display circuit 400 It consists of a central microprocessor 500 that exchanges data to turn on channel information on a menu screen and to select inputs and outputs with each video.

The operation of the present invention configured as described above is as follows. The antenna unit 100 receives a signal transmitted from a broadcasting station and inputs the signal to a demodulator of the tuner. The antenna unit includes a general rod antenna. The demodulation and tuning circuit 200 converts the broadcast program signal received from the antenna unit 100 into an intermediate frequency (IF) to select necessary information, and the central microprocessor 500 selects information for each band. The band selected for automatic selection is 'high'. That is, a voltage is applied to the terminal of the corresponding band. When the selected band goes high, automatic searching is performed from the selected band, and the execution continues to complete the selected band transfer to the place where each signal exists. This selected band, i.e. the selected channel, is recorded and output. The video / audio signal processor 300 amplifies and detects a broadcast program signal selected and output from the demodulation and tuning circuit 200, and then processes each signal into a video and audio signal. The gain obtained at this time is also controlled and adjusted to find the best point compared to the reference AFT curve set in the central microprocessor 500 to reduce the frequency shift by detecting the frequency in the 40 to 870 MHz band. The central microprocessor 500 controls the operations of the demodulation and tuning circuit 200 and the video / audio signal processing unit 300 and exchanges data with the on-screen display circuit 400 to locate the characters. The character generation instruction of the command turns on the channel information on the menu screen and enables input and output selection with each video. The on-screen display circuit 400 outputs or turns off characters on the screen according to the video signal of the video / audio signal processor 300 and the control signal of the central microprocessor 500 to display various information.

Next, Figure 2 describes the method of the present invention with reference to the following. The user instructs the channel selection of the video cassette recorder by using the remote controller (step 200). Determine whether to select channel selection automatically or manually (step 201). If the channel selection is made automatically in step 201, the channel band is selected (step 202). The channel is searched for each band regardless of whether a signal is present (step 203). The band-specific search is started from the selected or designated band (step 204). In other words, when searching for channels, the routine searches for the low frequency band among the VHF frequency band first, and finally searches for the UHF band, and searches for the channel in the currently designated band instead of searching the channel according to the routine of VL + VH + UHF. do. The channel in which the signal is present is stored in the memory (step 205). In step 201, if channel selection is made manually, it starts in the channel selection band and searches for the existence of a signal (step 206), and stores the channel in which the signal exists (step 207). Inquire is whether to confirm the channel information (step 208). Channel information is displayed on the screen via the on-screen display circuit (step 209).

As described above, when searching for channels of an entire television, the present invention unconditionally searches for the low frequency band among the VHF frequency bands first, and finally searches for the UHF band, and the frequency specified without using the routine of VL + VH + UHF. The search is started in the band and the channel can be searched continuously at a specified time interval, making the channel search convenient and fast.

Claims (3)

The antenna unit 100, which is composed of a general antenna and receives a broadcast program frequency propagated from an external space, converts the broadcast program signal received from the antenna unit 100 into an intermediate frequency (IF), and selects necessary information. A demodulation and tuning circuit 200 for searching for a channel from the selected band according to the band selection signal of the processor 500 and outputting the selected channel, and a broadcast program signal selected and output from the demodulation and tuning circuit 200. After amplifying and detecting the video / audio signal processing unit 300 for processing each signal into a video and audio signal, the on-screen display circuit 400 for outputting or displaying characters on the screen of the television to inform the user of various information. And control the operations of the demodulation and tuning circuit 200 and the video / audio signal processor 300 on-screen display. Automatic channel setting of a video cassette recorder, comprising a central microprocessor 500 for exchanging data with a circuit 400 to turn on channel information on a menu screen and to select inputs and outputs with respective videos. Device. Step (200) instructing channel selection of the video cassette recorder using a remote controller, determining whether to select channel selection automatically or manually (201), and selecting channel band (202) when channel selection is automatic (202). ), Step 203 for searching by band regardless of whether a signal is present, step 204 for starting search for each band from a selected or designated band, storing the channel in which the signal exists (205), channel And (209) inquiring whether or not to confirm the information and displaying (209) the channel information via the on-screen display circuit. 3. The method of claim 2, further comprising the steps of: 206 searching for the presence of a signal starting at the channel select band when manually performing channel search, and storing (207) a channel in which the signal is present. An automatic channel setting method of a video cassette recorder characterized by the above-mentioned.