KR100929765B1 - How to search for a broadcast channel - Google Patents

Abstract

The present invention saves the search time by storing the frequency data of the already searched broadcast channel together with the flag signal, so that the search process can be skipped for a frequency that has already been searched by frequency tuning by searching the flag signal first when re-searching. The present invention relates to a broadcast channel search method in a broadcast receiving device such as radio or TV having an effect of making a radio wave.

Broadcast, radio, tv, channel, tuner, seek, scan

Description

Method of searching for broadcasting channel

1 is a structural diagram of a frequency data stream according to an embodiment of the present invention;

2 is a flowchart illustrating a broadcast channel search method according to an embodiment of the present invention.

The present invention relates to a method for searching a broadcast channel in a broadcast receiving device. In particular, the searched broadcast channel data is displayed as a flag signal to search for broadcast channel data with a flag signal at a later broadcast channel search. The present invention relates to a broadcast channel search method for performing a quick channel search by performing a search only on missing broadcast channel data.

Hereinafter, the broadcast receiving device will be described by taking a radio as an example.

In the conventional radio, generally known broadcast channel searching methods include a tune up / down method, a seek up / down method, a BST (Best station memory) method, a scan method, and the like. There is this.                         

In the tune up / down method, when the user continuously presses the tune up / down key, it starts from the currently set frequency and starts with a minute frequency unit (for example, AM is 1 KHz, FM is 100 KHz). As the up / down is performed, the sequential search is started at the tuner of the radio, and the received broadcast channel is searched for and the user releases the tune up / down key and the search of the corresponding frequency is completed.

In the seek up / down method, when a seek up / down key is pressed once, the broadcast channel is turned on at the tuner of the radio while up / down in the frequency unit (for example, 9KHz for AM and 200KHz for FM). The search is performed until the search is performed so that the broadcast channel is searched and the search is completed at the corresponding frequency.

The BSM method searches the entire frequency bands (for example, AM bands of 531 to 1606.5kHz and FM bands of 88-108Mhz) while continuously up (or down) the frequency unit with a single press. The search is completed after sequentially storing them in the memory.

The scan method is the same as the BSM method, except that the search is stopped for several seconds each time a broadcast channel is searched, and the search is resumed after a few seconds after outputting the broadcast of the searched channel through the speaker.

The above-mentioned broadcast channel search methods are programmed and recorded in the microcomputer included in the broadcast receiving device, and the respective search methods programmed and recorded in the microcomputer are performed by the operation of the respective search method operation keys allocated to the respective search methods.

However, since the search operation is performed by tuning all frequencies each time the operation key is pressed, the conventional search method as described above, that is, the search process of circulating all frequency bands again after one cycle of all frequency bands is performed. There was a problem that it takes a lot of time for frequency tuning because it is repeated.

In particular, in the seek search method or the tune search method, the user performs frequency tuning in the opposite direction (for example, down direction) while the user performs a search process by frequency tuning in one direction (for example, up direction). There was a problem in that it took a considerable time just to tune the frequency searched before.

The present invention has been made to solve the above problems, and its object is to store the frequency data of the already searched broadcast channel together with the flag signal and search for the flag signal at the time of re-search first so that the search is completed by frequency tuning. In this regard, the present invention provides a broadcast channel search method for omitting a search process.

In the broadcast channel searching method of the present invention for achieving the above object, a flag signal is assigned to the frequency data of the broadcast channel to form a single data stream and stored therein, and the first step of checking whether the search up / down key is pressed is performed. Wow; If it is determined in step 1 that the search up / down key is pressed, searching for whether there is a data stream having a flag signal in the corresponding allocation period among the data streams; A third step of outputting frequency data as a variable in the corresponding data stream when a data stream having a flag signal is found within the corresponding allocation section in step 2; If the flag signal is not found in the allocation section in step 3, a search operation is performed to tune all frequencies in the allocation section. After frequency data is output, a constant value is set to stabilize the voltage of the tuner mobilized in the frequency search process. Step 3a, to which a procedure of time delay is added; It is characterized in that the four steps to move the allocation interval by a predetermined unit, and if there is the frequency data output as a variable in the step 3 and step 3a to confirm this to the user.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows a structure of a data stream according to the present invention, in which a flag signal and frequency data constitute one data stream.

The data stream is an input / output unit of a microcomputer or a memory, and a plurality of data streams form one database.

Frequency data of a broadcast channel searched by a frequency search operation of a broadcast receiving device constitutes one data stream in combination with a flag signal giving at least 1 bit or more.

When explaining the embodiment of the present invention configured as described above with reference to FIG.

Step S1 is a step of checking whether the search up / down key is pressed.                     

Step S2 is a step of searching for a data stream with a flag signal in the data stream within the allocation interval.

In the second step (S2), the allocation interval is a frequency ensuring interval defined in the frequency management dimension so that only one broadcast channel exists within a certain frequency range in consideration of the influence of frequency interference.

In step S3, the frequency data of the data stream with the flag signal is output as a variable in the search process.

In the second step (S2), if there is no data stream with a flag signal in the allocation interval, the search step 3a (S3a) for tuning the frequency by a predetermined frequency (for example, AM 9KHz, FM 200KHz) ) Is performed.

When a broadcast channel is found in step 3a (S3a), a flag signal is given to frequency data of the corresponding broadcast channel to form one data stream and then output as a variable.

Step 4 (S4) is a step for moving the allocation section by one step. In addition, when there is frequency data output as a variable in step S3 and step 3a (S3a), an operation of confirming this to the user is performed.

After step 4 (S4), step 1 (S1) is repeatedly performed, and when the user releases the search up / down key, the frequency is confirmed to be confirmed in step 4 and is terminated.

The flag signal is a signal of at least one bit or more, and in the first step, the search up / down key may be replaced by a tune up / down key, seek up / down key, BSM key, or scan key. If the BSM key or the scan key is used instead, the frequency search is performed in one direction (ie, the direction of increasing or decreasing frequency).

In addition, after the frequency data is output in step 3a (S3a) may be performed by adding a step (S3b) of a constant time delay to stabilize the voltage of the tuner mobilized in the frequency search process.

In the present invention as described above, the frequency data of the already searched broadcasting channel is stored together with the flag signal so that the flag signal is searched first when re-searching, so that the search process can be omitted for frequencies for which the frequency tuning has already been completed. As a result, the time required for the broadcast receiving device to search for a broadcast channel can be shortened.

Claims (4)

Giving a flag signal to the frequency data of the broadcast channel to form one data stream, storing the same, and confirming whether a search up / down key is pressed; If it is determined in step 1 that the search up / down key is pressed, searching for whether there is a data stream having a flag signal in the corresponding allocation period among the data streams; A third step of outputting frequency data as a variable in the corresponding data stream when a data stream having a flag signal is found within the corresponding allocation section in step 2; If the flag signal is not found in the allocation section in step 3, a search operation is performed to tune all frequencies in the allocation section. After frequency data is output, a constant value is set to stabilize the voltage of the tuner mobilized in the frequency search process. Step 3a, to which a procedure of time delay is added; And a four step of moving the allocation section by a predetermined unit and checking the user if there is frequency data output as a variable in steps 3 and 3a. delete delete delete

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