KR20090008828A - Apparatus and method for searching broadcasting data - Google Patents

Apparatus and method for searching broadcasting data Download PDF

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Publication number
KR20090008828A
KR20090008828A KR1020070072101A KR20070072101A KR20090008828A KR 20090008828 A KR20090008828 A KR 20090008828A KR 1020070072101 A KR1020070072101 A KR 1020070072101A KR 20070072101 A KR20070072101 A KR 20070072101A KR 20090008828 A KR20090008828 A KR 20090008828A
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KR
South Korea
Prior art keywords
program
information
name
broadcast
name information
Prior art date
Application number
KR1020070072101A
Other languages
Korean (ko)
Inventor
김주철
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020070072101A priority Critical patent/KR20090008828A/en
Publication of KR20090008828A publication Critical patent/KR20090008828A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]

Abstract

An apparatus and a method for searching broadcasting data are provided to compare a previously received PS(Program Service) name with a currently received PS name by using a PS name address included in a group type of an RDS(Radio Data System), thereby searching and tuning a desired program. A broadcast data searching device comprises a tuner(121), a storage unit(124) and a controller(126). The tuner receives a broadcast. The storage unit stores broadcasting program name information. The controller compares the stored program name information with currently received program name information to tune the compared program name information to a corresponding program.

Description

Apparatus and method for searching broadcasting data}

1 is a system block diagram showing a network between a user and a receiver, for example Car Audio, according to the present invention.

2 is an example of an RDS data structure in which data transmission and reception between a receiver and a broadcasting station is performed;

FIG. 3 shows the structure of a PI code and code-specific information showing each case of 16 as a second nibble code of 4 bits among PI codes. FIG.

4 is a diagram illustrating a group type.

5 is a diagram illustrating transmission of an alternative frequency (AF)

6 is an embodiment diagram illustrating searching for a PS Name of the present invention.

7 is a view showing comparing the PS Name according to the present invention.

8 is a flowchart showing searching / tuning a PS name according to the present invention.

The present invention relates to an apparatus and method for connecting a network of a program with a corresponding network using a program service name in a radio data system (hereinafter referred to as RDS). will be.

In general, searching and tuning of a conventional program has been performed by seeing the entire radio band or by priority based on a PI (program identification code).

General terms used in the present invention will be described as follows.

1) Network: A group of frequencies that transmit the same program in RDS (Radio Data System).

2) PI (Program Identification) code: It consists of a code that allows the receiver (Car audio, etc.) to distinguish the country and region where the same program is sent and the ID of the program itself. The PI code is not for display but is a value assigned to each program to distinguish it from all other programs.

3) PS (Program service) name: This is to inform the user what program is currently transmitting from the broadcasting station to which the receiver is tuning. PS name is the label of the program consisting of Alphanumeric Characters of 8 bytes or less.

4) AF (Alternative frequency): Names of frequencies that transmit the same program.

5) MF (Main frequency): Frequency currently tuned during AF.

The present invention is to solve the above problems, by using the PS Name Address transmitted included in the group type in the transmitted RDS data structure to compare the PS Name that was previously received and the currently received PS Name It is suggested to search / tune the desired program.

In order to achieve the above object, a broadcast data search apparatus according to the present invention comprises: a tuner in which a broadcast is received; Storage means for storing broadcast program name information; And a controller for comparing the stored program name information with the currently received program name information and controlling to tune to the corresponding program.

In addition, the broadcast data search method according to the present invention, the step of outputting a program;

Checking an output level of the output program; Comparing the outputted program with the received programs using a program name when the check result is less than or equal to a predetermined value; And tuning to a corresponding frequency based on the comparison result.

Hereinafter, a broadcast program searching apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

First, the terms "RDS", "PI", or "PS" mentioned in the present invention were selected as general terms as widely used as possible at present, but in some cases, the terms arbitrarily selected by the applicant, Since the meaning has been described in detail in the Description, it should be understood that the present invention should be understood as a meaning of a term rather than a simple name of the term.

1 is a system block diagram illustrating a network between a user and a receiver, for example, Car Audio according to the present invention.

As shown in the figure, data is transmitted and received between the user 110 and the receiver 120 via wired / wireless.

The user connects to the receiver 120 through an input device, for example a keyboard, a mouse or a microphone.

The receiver may include a key input unit 125 for inputting a user command, an RDS tuner 121 for receiving a wireless data broadcast through an antenna (not shown), and an output unit 123 for outputting a signal output from the RDS tuner. According to the user's command input through the broadcast signal processing unit 122 and the storage means 124 for storing the wireless data broadcast program information, the related program and the replacement frequency list, and the input unit 125 And a controller 126 for controlling the components and controlling the stored program name information and the currently received program name information to be tuned to the corresponding program.

In the wireless data system receiver according to the present invention configured as described above, the control unit 126 is a signal of good quality when the signal quality of the broadcast program received at the current frequency (MF) is less than the set reference value In order to switch to the received alternative frequency, the quality of the received signal is checked for each of the current frequency and the alternative frequency stored in the storage means 124.

The controller 126 tunes the RDS tuner 121 to each of the alternative frequencies, and tunes a signal broadcast at each frequency of the RDS tuner 121 and outputs the tuned signal to the broadcast signal processor 122.

The broadcast signal processor 122 processes the RDS composite signal output from the RDS tuner 121 and outputs an audio signal and RDS data to the output unit 123 and the controller 126.

The controller 126 determines the quality of the broadcast signal received from the signal output from the broadcast signal processor 122 to set the quality of the received broadcast signal for each of the current frequency and the substitute frequency stored in the storage means 124. When the reference value is less than the reference value, the second nibble code information of the program identification (PI) code of the current frequency is used or the replacement frequency list completion flag information is used together with the second nibble code information of the PI code. It will control the frequency search process.

2 is an example of an RDS data structure in which data transmission and reception between a receiver and a broadcasting station is performed.

As shown in the figure, a PI code 201, a Group type code 202, a Program Service Name 203, an alternative frequency 204, and the like are included.

The PI code 201 will be described with reference to FIG. 3.

FIG. 3 is a diagram showing the structure of a PI code and code-specific information showing each case of 16 as a second nibble code of 4 bits among PI codes.

Referring to FIG. 3, one frame transmitted includes a PI code of 16 bits 301 and broadcast information of 88 bits 302, and includes the most significant 4 bits b15-b12 (first nibble) of the 16 bits ( 301a indicates a country code to which the broadcasting station belongs, and the next four bits b11 to b8 (the second nibble) indicate program type information regarding a transmission area range in which the broadcast is transmitted, and the lower 8 bits ( b7-b0) (third and fourth nibbles) represent a program reference number for the program itself.

Referring to FIG. 3, the second nibble 4 bits indicating program type information on a region range through which broadcasts are transmitted are L (Local), I (International), N (National), S (Supra-regional), and R1. 16 types of information, which are classified by ~ R12 (Regional).

16 kinds of information are represented by each binary number. For example, L may be represented by "0000", I by "0001", and the like.

The L (Local) represents a local program that is broadcast through only one transmitter during a time when the program is broadcast. (Local program transmitted via a single transmitter only during the whole transmitting time)

The I (International) indicates a program in which the same program is broadcast in another country. (The same program is also transmitted in other countries)

The N (National) represents a program in which the same program is broadcast in all regions within a country.

The supra-regional (S) represents a program that is broadcasted over a wide area within a country. (The same program is transmitted throughout a large part of the country)

The program is available only in one location or region over one or more frequencies, and there exists no definition of its frontiers. ).

Therefore, by using the information included in the second nibble code, it is possible to know whether or not there is a possibility that the same program is broadcasted around, so that the SEEK PI process can be performed only when there is a possibility that the same program is broadcasted around. do.

In order to clearly distinguish the different program groups, the program reference number 401c systematically distributes the 1 byte data in each country and connects the program groups in a comprehensive manner.

The PS name in the RDS data structure of FIG. 2 will be described.

The PS name is transmitted using 0A 401 and 0B 402 of the Group type as an example. Further details relating to the above are given in British Stansard.

Two PS characters (2 bytes) are sent to one 0A and 0B, respectively, and eight PS characters (8 bytes) are completed using the PS name address (C0, C1).

   PS    0     One    2     3    4    5    6     7 Address

In the above, 2 bytes 0, 1 is C1 = 0, C0 = 0, 2 bytes 2, 3 is C1 = 0, C0 = 1, 2 bytes 4, 5 is C1 = 1, C0 = 0, 2 bytes 6, 7 denotes C1 = 1 and C0 = 1, and the decoder control bits indicated by the C1 / C0 values refer to FIG. 2.

 Type 0A and 0B occupy 40% of the entire group of RDS data transmitted in FIG.

It takes about 1 second to receive the completed PS name of 8 bytes of Data of Type 0A and 0B.

Takes.

5 is a diagram illustrating transmission of an alternative frequency (AF).

Referring to FIG. 5, the structure of an alternate frequency (AF) list stored in a memory includes a header portion 501 indicating a total number of AFs in the list, a current tuning frequency (MF) information portion 502, and A first group (AF Method A) 503 having AF information for the MF, and a second group (AF method B) 504 having one MF 99.5 and each AF in parallel for the MF It consists of.

In the above, AF is an alternative frequency for outputting a program such as MF.

6 is a diagram illustrating an embodiment of searching for a PS Name of the present invention.

If the PI code of the MF (Main Frequency) of the currently receiving program is changed or the reception quality is remarkably deteriorated, and switching to AF is necessary (1 in Fig. 6a), try tuning the memorized AF. (② of FIG. 6A)

If all the AFs held by the memory in the receiver do not have the same PI as the MF (3 in Fig. 6a), the entire radio band is searched.

The PS name is searched for a certain quality level (a combination of signal strength, multipath, etc.) that is equal to or above a certain quality level in all radio bands (FIG. 6B).

If the same PS is found, the corresponding frequency is tuned; otherwise, FIGS. 6A and 6B are alternately repeated. (FIG. 6C).

7 is a view showing comparing the PS Name according to the present invention.

As described above with reference to FIG. 4, it is transmitted using 0A 401 and 0B 402 of a group type. Two PS characters (2 bytes) are sent to one 0A and 0B, respectively, and eight PS characters (8 bytes) are completed using the PS name address (C0, C1).

The operation of comparing the PS Name is as follows.

Compare the PS stored in the receiver with the received PS. Comparing the PS name of each received 2 bytes, if the same is equal to the next received 2 bytes to compare the total 8 bytes. Here, the start Addr is not determined in the reception order of PS 2 bytes, and when a specific Addr is received, the next Addr is continuously received.

If the PS 2 bytes are different while comparing the total of 8 bytes, the system ends immediately without comparing the remaining PS bytes.

Upon completion, the PS name is received at the next frequency having a predetermined quality level, and the corresponding program is searched / tuned by repeating the comparison process as described above.

8 is a flowchart illustrating searching / tuning a PS name according to the present invention.

The user outputs the program through the receiver. (S 801).

As a result of checking the output level of the outputted program, if it is less than or equal to a predetermined value, an alternative frequency of the outputted program is searched for. (S 802, S 803).

If the outputted program is not searched, the RDS data of a predetermined output level or more is extracted by searching the entire frequency band. (S 804, S805).

When the same program is found by comparing the extracted program with the extracted program using a PS name, the tuner tunes to the corresponding frequency. (S 806, S 807).

In searching for the PS Name, the broadcast program name information is composed of 8 bytes, and if the two byte information is not identical to each other, the program name information is repeated without determining other information. (S 808, S 809).

The flow order of the present invention as described above and the other flow order of the present invention are shown as an example, and may be operated by changing the order of operation.

As described above, the PS Name retrieval apparatus and method according to an embodiment of the present invention may connect a program to a corresponding network using a program service name.

As mentioned above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art can improve other various embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. Changes, substitutions or additions will be possible.

The apparatus and method for receiving broadcast data according to the present invention as described above may search / tune a program output by a user using information of a program service name (PS name) in a radio using a RDS (Radio Data System). have.

Claims (5)

A tuner in which a broadcast is received; Storage means for storing broadcast program name information; And And a control unit for comparing the stored program name information with the currently received program name information and controlling the program to tune to the corresponding program. The broadcast data retrieval apparatus according to claim 1, wherein the program name information is composed of eight bytes, and the two-byte information is compared with each other. In receiving broadcast data, Outputting a program; Checking an output level of the output program; Searching for an alternative frequency of the output program when the check result is less than or equal to a predetermined value; Searching for the entire frequency band when the outputted program is not searched; Extracting RDS data of a predetermined output level or more through the full-band search; Comparing the extracted program with the extracted programs using a program name; And And tuning to a corresponding frequency based on the comparison result. In receiving broadcast data, Outputting a program; Checking an output level of the output program; Comparing the outputted program with the received programs using a program name when the check result is less than or equal to a predetermined value; And And tuning to a corresponding frequency based on the comparison result. The method of claim 3 or 4, wherein the program name information is composed of 8 bytes, and if the two byte information is not identical to each other, the process of repeating the comparison with different programs without checking other information is repeated. Broadcast data retrieval method.
KR1020070072101A 2007-07-19 2007-07-19 Apparatus and method for searching broadcasting data KR20090008828A (en)

Priority Applications (1)

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KR1020070072101A KR20090008828A (en) 2007-07-19 2007-07-19 Apparatus and method for searching broadcasting data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070072101A KR20090008828A (en) 2007-07-19 2007-07-19 Apparatus and method for searching broadcasting data

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KR20090008828A true KR20090008828A (en) 2009-01-22

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KR1020070072101A KR20090008828A (en) 2007-07-19 2007-07-19 Apparatus and method for searching broadcasting data

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