WO1998044663A1 - Method of storing af data for an rds receiver and apparatus thereof - Google Patents
Method of storing af data for an rds receiver and apparatus thereof Download PDFInfo
- Publication number
- WO1998044663A1 WO1998044663A1 PCT/KR1998/000066 KR9800066W WO9844663A1 WO 1998044663 A1 WO1998044663 A1 WO 1998044663A1 KR 9800066 W KR9800066 W KR 9800066W WO 9844663 A1 WO9844663 A1 WO 9844663A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- memory
- program identification
- identification code
- type
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
- H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
-
- 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]
Definitions
- This invention is related to a radio data system
- RDS radio frequency
- AF's (hereinafter referred to as AF's) data for an RDS receiver and an apparatus thereof.
- the Radio Data System was developed under the auspices of the European Broadcasting Union which published its specification, "Specification of RDS, i.e., European Standard EN 50067, approved by CENELEC on 24 April 1992", for providing additional services to listeners .
- RDS the data are broadcast in what are known as groups.
- a group is a 104- bit message comprising four 26-bit blocks called block 1 to block 4. Within a block 16 bits carry information, and 10 bits are used for error protection.
- the first block of every group always contains a Program Identification (hereinafter referred to as PI) code.
- PI Program Identification
- the first four bits of the second block of every group are allocated to a four-bit code which specifies the application of the group.
- FIG. 1 is a diagram for showing the format of type OA groups. As shown in FIG. 1, two AF codes are normally transmitted in block 3 of group OA. The 8 -bit codes generally indicate VHF channels at 100kHz intervals. The type OA groups give information on the various transmitters broadcasting the same program in the same or adjacent reception areas, and enable a receiver to reduce the time for switching to another transmitter.
- FIG. 2 is a diagram for showing the format of type 14A groups. As shown in FIG. 2, two methods exist for the transmission of AF ' s in an enhanced other network
- Method (Variants 5 to 9 of group type 14A) .
- the Method A is coded in precisely the same way as Method A using OA groups.
- the Mapped Frequency Method provides a means whereby a VHF frequency carrying a cross-referenced service may be correlated to a frequency of the tuned service (as carried in OA groups) . Therefore, when AFs are transmitted from broadcasting stations, the RDS receiver can perform an automatic tuning process thereof by utilizing AFs transmitted from the broadcasting stations.
- U.S. Pat. No. 5,428,825 One example of a method of selecting receiving frequency for an RDS receiver which is mounted on a vehicle is disclosed in U.S. Pat. No. 5,428,825.
- a list of alternative frequencies being transmitted by former broadcasting stations are stored in -a memory, and the receiver chases the same broadcast program based on the stored list of alternative frequencies whenever the vehicle returns to the same boadcasting service area of the network.
- the stored list of alternative frequencies data relating to frequencies of the received broadcast waves during the operation of chasing the same radio program are also utilized together with the stored list of alternative frequencies transmitted by the broadcasting stations for chasing the same broadcast program. Therefore, the method can allow the RDS receiver to receive the same broadcasting program without failing of chasing the same broadcasting program when the RDS receiver returns to the broadcasting network within which the RDS receiver has received the same broadcast program.
- EON enhanced other network
- a method of storing alternative frequencies in a preset memory is provided for an RDS receiver.
- the RDS receiver includes the preset memory which is divided into a plurality of memory spaces, to each of which each of progam identification codes is assigned in order to distinguish the plurality of memory spaces from one another.
- Each of the plurality of memory spaces stores a plurality of tuning frequencies, each of which is used for an automatic tuning operation of the RDS receiver.
- the method comprises the steps of: a) detecting a type and version of a group of RDS data received by the RDS receiver; b) storing two alternative frequencies included in the group in one of the plurality of memory spaces according to a program identification code of the group when the group is of OA type and version; c) detecting a usage code of the group when the group is of 14A type and version; and d) storing one alternative frequency or two included in the group in one of the plurality of memory spaces according to a program identification code in block 4 of the group when a code value of the usage code is one among 4 through 9.
- an apparatus for storing alternative frequencies for an RDS receiver which can receive an RDS broadcasting signal transmitted by a broadcasting frequency and decode the RDS signal includes: a) a preset memory for storing tuning frequencies, each of which is used for an automatic tuning operation of the RDS receiver, wherein the preset memory is specified into a plurality of memory spaces, each of which stores tuning frequencies and a program identification corresponding to a broadcasting station; b) a plurality of preset buttons for manually storing one tuning frequency or more in each of the memory spaces of the preset memory and for selecting one of the memory spaces - when one of the plurality of preset buttons is pressed; c) an AF memory for storing the alternative frequencies according to a program identi ication code corresponding to the alternative frequency in order to chase a broadcasting program by varying a receiving frequency of the RDS receiver based on the alternative frequencies; and d) a control means for storing the alternative frequencies for a broadcasting program received by the RDS receiver in
- the RDS receiver moves from one network to any other, the RDS receiver according to the present invention can receive a broadcasting program which he wants to listen only by pressing upon the preset buttons without re-setting the preset memory since tuning frequencies stored in the preset memory are continuously updated.
- FIG. 1 is a diagram for showing the format of type OA groups ;
- FIG. 2 is a diagram for showing the format of type 14A groups
- FIG. 3 is a block diagram for showing an RDS receiver according to one embodiment of the present invention
- FIG. 4 is a view for illustrating a preset memory depicted in FIG. 3;
- FIGs . 5A and 5B are a flowchart for showing an operation of the RDS receiver depicted in FIG. 3.
- FIG. 3 is a block diagram for showing an RDS receiver according to one embodiment of the present invention.
- the RDS receiver includes a tuner 102, an FM demodulator 103, a stereo decoder 104, a 57KHz bandpass filter 105, an RDS decoder 106,, an AF memory 107, a preset memory 108 a input part 109, a level detector 110, an A/D converter 111, and a controller 112.
- the tuner 102 selects any one of broadcast signals inputted through an antenna 101 according to a control signal generated from the controller 112.
- a central frequency of broadcast signal selected by the tuner 102 is transformed into the intermediate frequency (hereinafter, referred to as IF) , and the intermediated frequency signal is amplified by an IF amplifying stage (not shown in FIG. 3) before outputted to the FM demodulator 103.
- the FM demodulator 103 demodulates the IF signal thereby to develop a multiplex signal including an RDS signal, and outputs the multiplex signal to the stereo decoder 104 and the 57KHz bandpass filter 105, respectively.
- the stereo decoder 104 generates left and right audio signals by decoding the multiplex signal and outputs the left and right audio signals to a low frequency amplifier (not shown in FIG. 3) of driving speakers (not shown in FIG. 3) with the left and right audio signals.
- the 57KHz bandpass filter 105 filters the multiplex signal inputted from the FM demodulator 103, and outputs the RDS signal to the RDS decoder 106 .
- the RDS decoder 106 decodes the RDS signal thereby to develop RDS data and outputs the RDS data to the controller 112.
- the AF memory 108 stores a plurality of alternative frequencies. The plurality of alternative frequencies is stored in the AF memory 108 with being related to a PI code thereof .
- FIG. 4 shows a view for illustrating a preset memory depicted in FIG. 3.
- the preset memory 108 stores a plurality of tuning frequencies which are used for tuning to each broadcasting station.
- the preset memory 108 is specified into a plurality of memory spaces, to each of which PI codes is allocated.
- Each of the plurality of memory spaces is divided into two memory areas, each of which can store a maximum of 12 tuning frequencies .
- One of two memory areas which will be referred to as TN memory area, stores tuning frequencies for this network (hereinafter, referred to as TN tuning frequencies) , each of which makes it possible to allow the RDS receiver to receive the same broadcast program at the same broadcasting network.
- the other of the two memory areas which will be referred to as ON memory area, is used to store tuning frequencies for other broadcast networks (hereinafter, referred to as ON tuning frequencies) .
- ON tuning frequencies Each ON frequency allows the RDS receiver to receive the same broadcasting program at any other broadcasting networks.
- the input part 109 includes a band selection button 1091 and first through sixth preset buttons Ml through M6 in order to select a broadcasting station (or a broadcasting program) .
- the band selection button 1091 selects one of three FM modes (FM1, FM2 , and FM3) which are divided according to frequencies of FM broadcasting signals.
- 6 memory spaces of the preset memory 108 are assigned to each of the three FM modes, such that when one of the three FM modes is selected, 6 memory spaces among all 18 memory spaces of the preset memory 108 are selected.
- the first through sixth preset buttons Ml through M6 correspond to each of the 6 memory spaces which are selected by the band selection button 1091. Therefore, the user can select one of 18 memory spaces with the band selection button 1091 and the first through sixth preset buttons Ml through M6.
- the level detector 110 outputs a field detection signal, a direct current level of which is varied according to a receiving level of a broadcasting signal based on IF signal outputted from the tuner 102.
- the A/D converter 111 converts the direct current level of the field detection signal into a digital signal, and outputs the digital signal to the controller 112.
- the controller 112 substantially controls all the parts of the RDS receiver.
- the controller 112 processes the RDS data based on a program stored in a program memory thereof according to instructions inputted from an exterior.
- one memory space of the preset memory 108 is selected.
- the controller 112 reads tuning frequencies out from the selected memory space of the preset memory 108, and controls the tuner 102 according to each of the tuning frequencies thereby to make the tuner 102 in turn receive broadcasting signals according to each of the tuning frequencies .
- the controller 112 compares with one another receiving signals which are received by the tuner 102 according to the tuning frequency in order to select one of the tuning frequencies which can allow the tuner 102 to receive of the selected broadcasting program with the greatest receiving level than by any other tuning frequencies .
- the receiving broadcast signal includes RDS signal
- the RDS signal is detected by the 57KHz bandpass filter 105.
- the RDS signal passed through the 57KHz bandpass filter 105 is decoded by the RDS decoder 106, and provided to the controller 112.
- the controller first determines the application of RDS data based on the type code and version code included in each groups of the RDS data, and processes the RDS data according to the application.
- the controller 112 stores the alternative frequencies at the AF memory 107 and the preset memory 108 according to a PI code thereof .
- the processor 112 detects the type and version codes included in each group of the RDS data in order to determine whether each group of the RDS data includes the alternative frequencies.
- the controller 112 makes a list of alternative frequencies according to PI code and stores the list of the alternative frequencies at the AF memory 107 together with the PI code. And then, the controller 112 discriminates whether the PI code is identified with any PI code which is stored in each memory space of the preset memory 108. When the PI code is stored in the preset memory 108, the controller 112 stores the alternative frequencies in the TN memory area under the PI. To the contrary, when the PI code is stored in the preset memory 108.
- the controller 112 assigns the PI code to any one of the memory spaces of the preset memory 108 and stores the alternative frequencies in the TN memory area of the assigned memory space under the PI code.
- the controller 112 discriminates whether the 14 type group includes one alternative frequency or two with a usage code thereof.
- the controller 112 stores the one alternative frequency or two included in the 14A type group in the AF memory 107 together with the PI code in the block 4 of the 14A type group.
- the controller 112 discriminates whether the PI code is identified with any PI code stored in the preset memory 108.
- the controller 112 stores the one alternative frequency or two in the ON memory area of the memory space in which the PI code is stored.
- the controller 108 updates the PI code in the preset memory 108 and stores the one alternative frequency or two in the ON memory area under the PI code.
- the controller 112 When a user selects one of FM 1 through 3 with the band selection button 1091 and turns on by pressing one among the first preset button through the sixth Ml through M6, the controller 112 reads tuning frequencies out from a memory space corresponding to the selected band and preset button, and controls the tuner 102 according to the tuning frequencies thereby to receive broadcasting signals. Each level of the broadcasting signals which are received by the tuning frequencies is detected by the level detector 110, and is outputted into the controller 112 after being converted into the digital signal by the A/D converter 111. And then, the controller 112 controls the tuner 102 to receive a broadcasting signal of the greatest level more than any other based on each level of the broadcasting signals.
- the broadcasting signal is inputted to the FM demodulator 103.
- the FM demodulator 103 demodulates the broadcasting signal thereby to generate a multiplex signal, and outputs the multiplex signal to the stereo decoder 104 and the 57KHz bandpass filter 105, respectively.
- the stereo decoder decodes the- multiplex signal thereby to generate left and right audio signals, and provides the left and right audio signals to the low frequency amplifier (not shown in FIG. 3) which drives speakers of the RDS receiver with the left and right audio signals, thereby outputting the left and right audio signals to an exterior.
- the broadcasting signal includes an RDS signal
- the RDS signal included in the multiplex signal is detected by the 57KHz bandpass filter 105 and inputted to the RDS decoder 106.
- the RDS decoder 106 decodes the RDS signal thereby to generate RDS data, and outputs the RDS data to the controller 112.
- the controller 112 discriminates the application of the RDS data, and processes the RDS data according to the application of the RDS data.
- FIG. 5A and 5B are a flowchart for showing an operation of the RDS receiver depicted in FIG. 3.
- the controller 112 When the RDS data is outputted from the RDS decoder 106 to the controller 112, the controller 112 first detects type and version codes of each group which is included in the RDS data thereby to determine each application of the groups (ST1).
- the controller 112 After detecting each of the type and version codes of the groups in step 1, the controller 112 discriminates whether each type and version of the groups is 0A(ST2) .
- the controller 112 makes a list of alternative frequencies, and stores the list of alternative frequencies and PI code of the groups in the AF memory 107 (ST3, ST4) .
- the controller 112 discriminates whether the PI code is stored in the preset memory 108 (ST5) .
- the controller 112 stores the list of alternative frequencies in a TN memory area of the memory space in which the PI code is stored (ST6) .
- the controller 112 discriminates whether the preset memory 108 has an empty memory space in which no PI code is stored (ST7) .
- the controller 112 assigns the PI code to the empty memory space of the preset memory 108, and stores the list of alternative frequencies as tuning frequencies under the PI code(ST8) .
- the controller 112 detects a PI code which is not updated recently from the preset memory 108. And, after replacing the PI code not used with the new PI code, the controller 112 stores the list of alternative frequencies as the tuning frequencies under the PI code in the memory space in which the PI code is stored (ST9) .
- step 2 when the RDS data includes a group which is not 0A type, the controller 112 determines whether the group is 14A type(STlO) . When the type and version of the group is 14A, the controller 112 reads a usage code out from the group, and determines whether a code value of the usage code of the group is one among 4 through 9(ST11, ST12) .
- the controller 112 stores one alternative frequency (ON) or two in the AF memory 107 together with a PI code (ON) which is assigned to block 4 of the group (ST13) .
- step 14 the controller 112 discriminates whether the PI code (ON) is stored in the preset memory 108(ST14) .
- the controller 112 stores the one alternative frequency or two in an ON memory area of the memory space in which the PI code is stored (ST15) .
- the controller 112 discriminates whether the preset memory 108 has an empty memory space in which no PI code is stored (ST16) .
- the controller 112 assigns the PI code (ON) to the empty memory space of the preset memory 108, and stores the one alternative frequency or two as one tuning frequency or two under the PI code(ST17) .
- the controller 112 detects a PI code which is not updated recently from the preset memory 108. And, after replacing the PI code not used with the new PI code (ON), the controller 112 stores one alternative frequency or two as the one tuning frequency or two under the PI code (ON) in the memory space in which the PI code is stored (ST18) .
- the RDS receiver can store alternative frequencies as tuning frequencies in the preset memory according to PI codes of the alternative frequencies.
- the RDS receiver moves from one network to any other, the RDS receiver according to the present invention can receive a broadcasting program which he want to listen only by pressing upon the preset buttons without re-setting the preset memory since tuning frequencies stored in the preset memory are continuously updated.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98911250A EP1013016A1 (en) | 1997-03-28 | 1998-03-27 | Method of storing af data for an rds receiver and apparatus thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970011034A KR19980074989A (en) | 1997-03-28 | 1997-03-28 | Ioen information storage processing method of car audio for RDS broadcasting reception |
KR1997/11034 | 1997-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998044663A1 true WO1998044663A1 (en) | 1998-10-08 |
Family
ID=19501127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR1998/000066 WO1998044663A1 (en) | 1997-03-28 | 1998-03-27 | Method of storing af data for an rds receiver and apparatus thereof |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1013016A1 (en) |
KR (1) | KR19980074989A (en) |
CN (1) | CN1251709A (en) |
WO (1) | WO1998044663A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2019493A2 (en) | 2007-07-10 | 2009-01-28 | Randy King | Method of selecting and broadcasting over a transmission frequency and device for the same |
US7697478B2 (en) | 2003-10-03 | 2010-04-13 | Nokia Corporation | Method and a mobile terminal for performing a handover in a broadcast system |
US7979027B2 (en) | 2008-02-28 | 2011-07-12 | Belkin International, Inc. | Method and system for selecting, transmitting, and receiving an unused carrier frequency and transmitting over the unused carrier frequency |
EP2149997A3 (en) * | 2008-07-30 | 2012-09-12 | Samsung Electronics Co., Ltd. | Method and mobile terminal for searching alternative frequency using radio data system |
US8503937B2 (en) | 2007-07-10 | 2013-08-06 | Belkin International, Inc. | Method and system for selecting, transmitting, and receiving an unused carrier frequency and transmitting over the unused carrier frequency |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060141962A1 (en) * | 2004-12-23 | 2006-06-29 | Sony Ericsson Mobile Communications Ab | Selecting/acquiring desired multimedia content |
US20060223467A1 (en) * | 2005-04-05 | 2006-10-05 | Nokia Corporation | Method and device for low-power FM transmission of audio data to RDS (Radio Data System) capable FM radio receiver |
CN101841378B (en) * | 2009-03-19 | 2014-11-05 | 阿尔派株式会社 | Broadcasting receiver and method for presetting broadcasting frequency thereof |
CN105915260B (en) * | 2016-05-31 | 2019-02-15 | 李向国 | A kind of rf frequency transform method carrying RDS signal |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4125433C1 (en) * | 1991-08-01 | 1993-01-07 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De | VHF car radio with RDS and traffic news decoders - has memories for diversity reception with automatic switch=over to other transmitting station chain when leaving geographical region |
US5428825A (en) * | 1990-09-14 | 1995-06-27 | Mitsubishi Denki Kabushiki Kaisha | Method of selecting receiving frequency for RDS receiver |
US5471662A (en) * | 1991-04-01 | 1995-11-28 | Sony Corporation | Radio data system receiver |
EP0687082A1 (en) * | 1994-06-08 | 1995-12-13 | Pioneer Electronic Corporation | Method of detecting PTY burst signal in a radio data system receiver |
-
1997
- 1997-03-28 KR KR1019970011034A patent/KR19980074989A/en not_active Application Discontinuation
-
1998
- 1998-03-27 EP EP98911250A patent/EP1013016A1/en not_active Withdrawn
- 1998-03-27 WO PCT/KR1998/000066 patent/WO1998044663A1/en not_active Application Discontinuation
- 1998-03-27 CN CN98803785A patent/CN1251709A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5428825A (en) * | 1990-09-14 | 1995-06-27 | Mitsubishi Denki Kabushiki Kaisha | Method of selecting receiving frequency for RDS receiver |
US5471662A (en) * | 1991-04-01 | 1995-11-28 | Sony Corporation | Radio data system receiver |
DE4125433C1 (en) * | 1991-08-01 | 1993-01-07 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De | VHF car radio with RDS and traffic news decoders - has memories for diversity reception with automatic switch=over to other transmitting station chain when leaving geographical region |
EP0687082A1 (en) * | 1994-06-08 | 1995-12-13 | Pioneer Electronic Corporation | Method of detecting PTY burst signal in a radio data system receiver |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7697478B2 (en) | 2003-10-03 | 2010-04-13 | Nokia Corporation | Method and a mobile terminal for performing a handover in a broadcast system |
EP2019493A2 (en) | 2007-07-10 | 2009-01-28 | Randy King | Method of selecting and broadcasting over a transmission frequency and device for the same |
US8503937B2 (en) | 2007-07-10 | 2013-08-06 | Belkin International, Inc. | Method and system for selecting, transmitting, and receiving an unused carrier frequency and transmitting over the unused carrier frequency |
US8509695B2 (en) | 2007-07-10 | 2013-08-13 | Belkin International, Inc. | Method of selecting and broadcasting over a transmission frequency and device for the same |
US8909154B2 (en) | 2007-07-10 | 2014-12-09 | Belkin International, Inc. | Method and system for selecting, transmitting, and receiving an unused carrier frequency and transmitting over the unused carrier frequency |
US7979027B2 (en) | 2008-02-28 | 2011-07-12 | Belkin International, Inc. | Method and system for selecting, transmitting, and receiving an unused carrier frequency and transmitting over the unused carrier frequency |
EP2149997A3 (en) * | 2008-07-30 | 2012-09-12 | Samsung Electronics Co., Ltd. | Method and mobile terminal for searching alternative frequency using radio data system |
US8532597B2 (en) | 2008-07-30 | 2013-09-10 | Samsung Electronics Co., Ltd. | Method and mobile terminal for searching alternative frequency using radio data system |
Also Published As
Publication number | Publication date |
---|---|
EP1013016A1 (en) | 2000-06-28 |
CN1251709A (en) | 2000-04-26 |
KR19980074989A (en) | 1998-11-05 |
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