Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/091—Traffic information broadcasting
  • G08G1/093—Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/091—Traffic information broadcasting
  • G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G3/00—Gain control in amplifiers or frequency changers
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G3/00—Gain control in amplifiers or frequency changers
  • H03G3/20—Automatic control
  • H03G3/30—Automatic control in amplifiers having semiconductor devices
  • H03G3/34—Muting amplifier when no signal is present
  • H03G3/342—Muting when some special characteristic of the signal is sensed which distinguishes it from noise, e.g. using speech detector
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G5/00—Tone control or bandwidth control in amplifiers
  • H03G5/16—Automatic control
  • H03G5/18—Automatic control in untuned amplifiers

Definitions

• VHF radio stations broadcast traffic announcements at certain times or for a given occasion, in particular to make the drivers of motor vehicles aware of disabilities, difficulties, diversions or danger points.
• a pilot signal emitted on the transmitter side to switch on the receiver which is switched off per se, to switch off a running cassette player or to switch the volume set in each case to an optimum value for intelligibility, in particular to increase, for example the driver is not overlooked and made aware of the traffic announcement when the music is played relatively quietly.
• the invention is based on the object of designing a radio receiver for a vehicle in such a way that the voice announcement after the switchover is subjectively more pleasant and understandable.
• the invention is based on the following knowledge.
• the switching of the lows and heights preferably takes place shortly before the switching, in particular increasing the volume, e.g. on the order of 100 ms beforehand. This avoids that the reproduction of the traffic announcement is still too uncomfortable at the beginning and that there is a crack.
• further switchovers can be carried out in the vehicle which are advantageous for the driver's attention, e.g. the switching off of acoustically disturbing consumers such as Fan. It may also be expedient to switch off the rear loudspeakers when switching over in a car, since then the information reproduced is essentially intended only for the driver and it is only a matter of intelligibility and not of hi-fi reproduction.
• FIG. 1 is a block diagram of the receiver according to the invention, Fig. 2.3 curves to explain the mode of action.
• Fig. 1 shows a receiver for a motor vehicle.
• the FM signal received with antenna 1 is sent to tuner 2, which provides the LF sound signal for sound reproduction.
• the low-frequency sound signal reaches the loudspeaker 5 via the circuit 3 for raising the bass and treble and the power amplifier 4.
• the signal from the tuner 2 also reaches the traffic radio decoder 6. This decoder recognizes this during a traffic announcement from Transmitter sent pilot signal and delivers a manipulated variable Usl, which increases the reproduction of the volume in the amplifier 4 to a preset value and, if necessary, switches off other disturbing consumers such as cassette recorders and fans.
• the decoder 6 additionally generates the switching voltage Us2.
• this switching voltage switches the lows and highs to values that are optimal for pure speech intelligibility. These values can preferably be set because experience has shown that the optimal LF frequency response is very individual for optimum speech intelligibility.
• FIG. 2 shows the time profile of the two switching voltages Us1 and Us2. To marks the beginning of a traffic announcement (VF). At this point in time, the switchover from a normally running radio broadcast S to traffic radio VF takes place. Shortly afterwards, the switching voltage Us2 appears and switches the lows and highs to values that are optimal for intelligibility. About 100 ms later the switching voltage Usl appears and switches the volume to a fixed value which is optimal for comprehensibility. This value is essentially dependent on the size of the motor vehicle, the engine noise and the driving noise.
• 3 shows the different frequency responses in the case of normal radio broadcast S and traffic announcement VF. In the case of a radio broadcast or a cassette reproduction, the frequency response to high frequencies and to high frequencies is in general greatly increased because this results in a subjectively more pleasant reproduction. at
• the playback volume is increased and, on the other hand, the switching response Us2 switches the frequency response to an approximately linear curve with a constant LF level and a constant switching level over the entire hearing frequency range.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Signal Processing (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Circuits Of Receivers In General (AREA)
• Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
• Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
• Burglar Alarm Systems (AREA)
• Control Of Amplification And Gain Control (AREA)
• Circuit For Audible Band Transducer (AREA)
• Traffic Control Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6347888

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Family Applications After (1)

Country Status (16)

Families Citing this family (13)

Family Cites Families (7)

• 1988
  • 1988-02-22 DE DE3805457A patent/DE3805457A1/de not_active Withdrawn
• 1989
  • 1989-02-15 RU SU894830836A patent/RU2060588C1/ru not_active IP Right Cessation
  • 1989-02-15 AU AU30527/89A patent/AU626150B2/en not_active Ceased
  • 1989-02-15 AT AT89102560T patent/ATE81235T1/de not_active IP Right Cessation
  • 1989-02-15 EP EP89902258A patent/EP0401244A1/de active Pending
  • 1989-02-15 HU HU891355A patent/HU207914B/hu not_active IP Right Cessation
  • 1989-02-15 JP JP1502075A patent/JP2771293B2/ja not_active Expired - Lifetime
  • 1989-02-15 EP EP89102560A patent/EP0330062B2/de not_active Expired - Lifetime
  • 1989-02-15 KR KR1019890701921A patent/KR0146049B1/ko not_active Expired - Fee Related
  • 1989-02-15 ES ES89102560T patent/ES2035386T5/es not_active Expired - Lifetime
  • 1989-02-15 WO PCT/EP1989/000136 patent/WO1989007860A1/de active IP Right Grant
  • 1989-02-15 DE DE8989102560T patent/DE58902343D1/de not_active Expired - Fee Related
• 1990
  • 1990-08-21 NO NO90903680A patent/NO903680L/no unknown
  • 1990-08-21 FI FI904143A patent/FI96729C/fi not_active IP Right Cessation
  • 1990-08-21 DK DK199001994A patent/DK172486B1/da not_active IP Right Cessation
• 1992
  • 1992-08-24 US US07/585,111 patent/US5438689A/en not_active Expired - Lifetime
  • 1992-12-23 GR GR920403107T patent/GR3006653T3/el unknown
• 1996
  • 1996-01-25 HK HK16496A patent/HK16496A/xx not_active IP Right Cessation

Non-Patent Citations (1)

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