GB2275849A - Battery saving circuit for a car radio with a decoder - Google Patents

Battery saving circuit for a car radio with a decoder Download PDF

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Publication number
GB2275849A
GB2275849A GB9324576A GB9324576A GB2275849A GB 2275849 A GB2275849 A GB 2275849A GB 9324576 A GB9324576 A GB 9324576A GB 9324576 A GB9324576 A GB 9324576A GB 2275849 A GB2275849 A GB 2275849A
Authority
GB
United Kingdom
Prior art keywords
car radio
decoder
control circuit
operating means
operating
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB9324576A
Other versions
GB9324576D0 (en
Inventor
Knut Fritsche
Hans-Gunther Scholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blaupunkt Werke GmbH
Original Assignee
Blaupunkt Werke GmbH
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 Blaupunkt Werke GmbH filed Critical Blaupunkt Werke GmbH
Publication of GB9324576D0 publication Critical patent/GB9324576D0/en
Publication of GB2275849A publication Critical patent/GB2275849A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/55—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A car radio has a decoder eg. RDS decoder 7 and a memory for automatically recording messager eg. traffic reports; parts of the circuitry not needed during the monitoring operation are switched off and the circuitry needed for monitoring is energised in a pulsed manner to reduce motor-vehicle batter discharge. During the transmission of a traffic report, the monitoring circuitry is energised continually. <IMAGE>

Description

2275849 Car radio having a decoder for additional signals and-having a
memory for transmitted information The invention relates to a car radio having a decoder for receiving and decoding signals in addition to normal radio broadcasts and a decoder memory for recording any desired decoded information.
It is known to provide traffic announcements by a system known as RDS which announcements will be heard by a driver whether or not he is listening to the channel on which the traffic announcement is broadcast.
In order that the driver of a motor vehicle can listen to previously transmitted traffic announcements on starting his journey, it is necessary to design a car radio in such a way that it monitors and records traffic announcements in a predeterminable operating state.
DE 29 10 073 C2 discloses a car radio having a traffic-radio decoder and an automatically controlled recording and playback device provided with an automatic memory device having a digital memory. In addition, the car radio has a control circuit which is connected to the announcement identification decoder and is intended to cause reading and writing of traffic announcement signals to and from the memory. Since the operating means used for monitoring have to remain constantly switched on in such a car radio, if the motor vehicle is parked for a long time, the vehicle battery may be discharged to such an extent that the remaining battery charge is no longer sufficient to start the motorvehicle engine.
German Patent Application P 42 28 116.4 proposes providing the operating voltage supply of a car radio with a circuit arrangement which supplies current only to the functional blocks necessary for monitoring a trafficradio transmitter and for storage in order to 2 store traffic announcements automatically with the car radio switched off.
The object of the invention is to reduce the power normally consumed in monitoring and recording traffic announcements by the operating means necessary for the purpose in a car radio.
The present invention provides a car radio having a decoder for additionally transmitted signals and a decoder-controlled memory for recording any desired retrievable information, the operating means necessary for receiving and for decodi ng being connected to a terminal carrying operating voltage in a selectable monitoring operating state, the car radio having a control circuit which, in the monitoring operating state, drives an electronically controllable switch via which the operating voltage is supplied to the operating means necessary for receiving and for decoding additionally transmitted signals, in such a way that said operating means are energized in a pulsed manner and wherein the control circuit is driven by said operating means in such a way that the electronic switch is held in the switched-on state and the memory ready to record for the duration of a signal indicating the presence of information the electronic switch being thereafter again driven in a pulsed manner.
The advantages achieved by the invention are, in particular, that it makes possible the clocked energization of operating means of a car radio and enables a radio transmitter to be monitored for additional signals over a prolonged period of time without excessively discharging the motorvehicle battery in the process.
Advantageous embodiments of the invention are specified in the sub-claims. To monitor trafficannouncements, decoders in accordance with claims 2 and 3 can advantageously be used. According to claim 4, a microcomputer can be used for the control circuit.
According to claim 5, a clock generator can advantageously be incorporated in the control circuit. Dimensioning the pulse lengths in accordance with claim 6 ensures that the start of a traffic announcement is also substantially detected and played back. Dimensioning the pulse length in accordance with claim 7 makes possible a relatively low energy consumption.
In order that the present invention be more readily understood, an embodiment of the invention will now be described by way of example with reference to the accompanying drawing showing a block diagram of an embodiment of the present invention. A terminal A of a car radio carrying the operating voltage U B is connected to the inputs of an appliance switch S1 and of an electronically controlled switch S2, and also to a microcomputer which serves as control circuit 1. The control circuit 1, which is connected to an operating part 2, has a clock generator 3 which is capable of switching the electronic switch S2 in a pulsed manner via the control circuit 1. The output of the appliance switch S1 is connected to the control circuit 1 and to those parts of the radio which are not necessary for monitoring a traffic-radio transmitter and require a high power consumption, such as an audio frequency amplifier 4, illuminating means and the like. The output of the electronically controlled switch S2 is connected to those parts of the radio necessary for monitoring a transmitter which broadcasts traffic announcements, such as RF stage 5, IF stage 6 and signal decoder 7, an RDS decoder (radio-data-system decoder) being provided as signa! decoder 7. One output of the signal decoder 7 connected downstream of the IF stage 6 is connected to the control circuit 1 and a further output to a memory 8 provided for recording and scanning traffic announcements.
4 If the appliance switch S1 is closed, the operating voltage U B is fed to the AF stage 4 and to the control circuit 1, which in turn closes the electronic switch S2 and consequently also supplies the RF stage 5, the IF stage 6 and the signal decoder 7 with the operating voltage U B The car radio is consequently in normal operation. If the car radio is, however, only to monitor an RDS radio transmitter for traffic announcements, the appliance switch S1 should be opened, thereby switching off, in particular, the AF stage 4. The clock generator now comes into operation and drives the electronic switch S2 in such a way that the operating means 5, 6, 7 necessary for receiving and identifying traffic announcements are energized in a pulsed manner. If an announcement identification signal is now detected by the signal decoder 7 during one of the short switch-on phases of the operating voltage U B for the operating means 5, 6, 7, the control circuit 1 holds the electronically controlled switch S2 in the switched-on state during the period of the identification signal and switches the memory 8 so as to record the traffic announcement. The announcement identification signal, which also disappears after the traffic announcements has taken place, again switches the control circuit 1 so as to clock the electronically controlled switch S2. The car radio is now in the monitoring mode again and the latter is interrupted only by a fresh traffic announcement.
In accordance with current RDS parameters, a traffic announcement should start only about 1.6 seconds after the initiation of the traffic announcement identification signal, it is expedient to choose the intervals between two consecutive clock pulses of the operating voltage U B 1 as:! 1.5 seconds. A pulse interval duration T off of 1.5 seconds and a pulse duration T on of 0.5 seconds results, for example, in a reduction in the power consumption which the car radio would normally require for monitoring to:
T 0.5 0.25 on T off + T on 1.5 + 0.5 Stored traffic announcement are read out in a manner known per se. At this point, it may be pointed out that it is not only traffic announcement which can be monitored with the means specified. Also the exact duration T off can be altered depending upon the parameters of the announcement.
6

Claims (8)

CLAIMS:
1. A car radio having a decoder for additionally transmitted signals and a decoder-controlled memory for recording any desired retrievable information, the operating means necessary for receiving and for decoding being connected to a terminal carrying operating voltage in a selectable monitoring operating state, the car radio having a control circuit which, in the monitoring operating state, drives an electronically controllable switch via which the operating voltage.is supplied to the operating means necessary for receiving and for decoding additionally transmitted signals, in such a way that said operating means are energized in a pulsed manner and wherein the control circuit is driven by said operating means in such a way that the electronic switch is held in the switched-on state and the memory ready to record for the duration of a signal indicating the presence of information the electronic switch being thereafter again driven in a pulsed manner.
2. A car radio according to claim 1, wherein said operating means includes a traffic-radio decoder for decoding the additional signals.
3. A car radio according to claim 1, wherein said operating means includes an RDS decoder for decoding the additional signals.
4. A car radio according to one of claims 1 to 3, wherein a microcomputer is provided as control circuit (1).
5. A car radio according to one of claims 1 to 4, wherein the control circuit (1) includes a clock 0 generator (3).
6. A car radio according to one of claims 1 to 5, wherein the pulse intervals between the clocked pulses of the operating voltage (U BY) have a pulse duration of (T off) of < 1.5 seconds.
7. A car radio according to one of claims 1 to 6, wherein the clocked pulses of the operating voltage (U B') have a pulse duration (T on) of about 0.5 seconds.
8. A car radio substantially as hereinbefore described with reference to the accompanying drawing.
GB9324576A 1993-03-03 1993-11-30 Battery saving circuit for a car radio with a decoder Withdrawn GB2275849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4306595A DE4306595A1 (en) 1993-03-03 1993-03-03 Car radio with a decoder for additional signals and with a memory for transmitted information

Publications (2)

Publication Number Publication Date
GB9324576D0 GB9324576D0 (en) 1994-01-19
GB2275849A true GB2275849A (en) 1994-09-07

Family

ID=6481817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9324576A Withdrawn GB2275849A (en) 1993-03-03 1993-11-30 Battery saving circuit for a car radio with a decoder

Country Status (6)

Country Link
JP (1) JPH077448A (en)
AT (1) AT404778B (en)
DE (1) DE4306595A1 (en)
FR (1) FR2702318A1 (en)
GB (1) GB2275849A (en)
IT (1) IT1273354B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357667A (en) * 1999-12-23 2001-06-27 Motorola Ltd Storage of traffic broadcasts in an RDS receiver
GB2407223A (en) * 2003-10-16 2005-04-20 Nokia Corp RDS receiver with reduced power consumption
US7072629B2 (en) * 2000-03-08 2006-07-04 Robert Bosch Gmbh Method for recording information transmitted over a radio frequency
GB2423877A (en) * 2006-03-06 2006-09-06 Imagination Tech Ltd Selectively storing information received from a broadcast signal
US7356319B2 (en) 2003-10-16 2008-04-08 Nokia Corporation Reduced power consumption
CN101868931A (en) * 2007-11-21 2010-10-20 高通股份有限公司 Radio data system (RDS) data processing methods and apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10150596B4 (en) * 2001-10-12 2009-04-02 Audi Ag Apparatus for receiving and updating TMC messages

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101510A (en) * 1988-06-18 1992-03-31 Robert Bosch Gmbh Energy conserving stand-by function in radio traffic report receiver

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
CH566677A5 (en) * 1972-11-17 1975-09-15 Blaupunkt Werke Gmbh
DE2518101A1 (en) * 1975-04-23 1976-11-04 Int Standard Electric Corp Remote volume control for radio receivers - brackets important broadcasts by frequency modulation of basic tone in order to give high volume
DE2910073C2 (en) * 1979-03-14 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Radio receiver with traffic decoder
DE3137047C2 (en) * 1981-09-17 1986-05-28 Siemens AG, 1000 Berlin und 8000 München Consumer electronics receiver with programmable masking of broadcasts
DE3304103C2 (en) * 1983-02-08 1985-02-14 Daimler-Benz Ag, 7000 Stuttgart Device for supplying power to radio sets in motor vehicles
DE3510606A1 (en) * 1985-03-23 1986-09-25 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Audio-equipment combination for a motor vehicle
JPH03143744A (en) * 1989-10-31 1991-06-19 Pioneer Electron Corp On-vehicle receiver device
DE4228116C2 (en) * 1992-08-25 1996-10-17 Blaupunkt Werke Gmbh Circuit arrangement for the operating voltage supply of a car radio

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101510A (en) * 1988-06-18 1992-03-31 Robert Bosch Gmbh Energy conserving stand-by function in radio traffic report receiver

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357667A (en) * 1999-12-23 2001-06-27 Motorola Ltd Storage of traffic broadcasts in an RDS receiver
US7072629B2 (en) * 2000-03-08 2006-07-04 Robert Bosch Gmbh Method for recording information transmitted over a radio frequency
GB2407223A (en) * 2003-10-16 2005-04-20 Nokia Corp RDS receiver with reduced power consumption
GB2407223B (en) * 2003-10-16 2006-06-07 Nokia Corp Reduced power consumption
US7107029B2 (en) 2003-10-16 2006-09-12 Nokia Corporation Reduced power consumption
US7356319B2 (en) 2003-10-16 2008-04-08 Nokia Corporation Reduced power consumption
GB2423877A (en) * 2006-03-06 2006-09-06 Imagination Tech Ltd Selectively storing information received from a broadcast signal
GB2423877B (en) * 2006-03-06 2007-05-30 Imagination Tech Ltd A method and system for selectively storing information received from a broadcast signal
US7817959B2 (en) 2006-03-06 2010-10-19 Imagination Technologies Limited Method and system for selectively storing information received from a broadcast signal
CN101868931A (en) * 2007-11-21 2010-10-20 高通股份有限公司 Radio data system (RDS) data processing methods and apparatus

Also Published As

Publication number Publication date
AT404778B (en) 1999-02-25
FR2702318A1 (en) 1994-09-09
GB9324576D0 (en) 1994-01-19
ATA38794A (en) 1998-06-15
IT1273354B (en) 1997-07-08
ITMI940365A1 (en) 1995-09-01
JPH077448A (en) 1995-01-10
DE4306595A1 (en) 1994-09-08
ITMI940365A0 (en) 1994-03-01

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)