EP0538289A1 - Procede de transmission d'un parametre de reglage variable dans le temps - Google Patents

Procede de transmission d'un parametre de reglage variable dans le temps

Info

Publication number
EP0538289A1
EP0538289A1 EP19910911867 EP91911867A EP0538289A1 EP 0538289 A1 EP0538289 A1 EP 0538289A1 EP 19910911867 EP19910911867 EP 19910911867 EP 91911867 A EP91911867 A EP 91911867A EP 0538289 A1 EP0538289 A1 EP 0538289A1
Authority
EP
European Patent Office
Prior art keywords
signal
transmitted
program
program signal
variable
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Withdrawn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
EP19910911867
Other languages
German (de)
English (en)
Inventor
Jürgen MIELKE
Georg Plenge
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.)
Deutsche Thomson oHG
Original Assignee
Telefunken Fernseh und Rundfunk GmbH
Thomson Consumer Electronics Sales 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 Telefunken Fernseh und Rundfunk GmbH, Thomson Consumer Electronics Sales GmbH filed Critical Telefunken Fernseh und Rundfunk GmbH
Publication of EP0538289A1 publication Critical patent/EP0538289A1/fr
Withdrawn legal-status Critical Current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
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/13—Arrangements for device control affected by the broadcast information
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/008—Control by a pilot signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/33—Arrangements for simultaneous broadcast of plural pieces of information by plural channels
    • H04H20/34—Arrangements for simultaneous broadcast of plural pieces of information by plural channels using an out-of-band subcarrier 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]

Definitions

  • the invention relates to a method according to the preamble of claim 1. Such a method is known from "EBU Review-Technical", No. 218 (August 1986), pages 2 to 12.
  • Broadcast sound signals are fed to the transmitters with a dynamic range (difference between the loudest and quietest signals) which is matched to the signal-to-noise ratio of the following transmission path.
  • the resulting dynamics do not meet the individual needs of the radio listener. For example, when listening in a moving motor vehicle, the transmitted dynamics are considerably too great because of the noise level in the vehicle, whereas, for example, when listening via headphones, the transmitted dynamics, which are generally lower than the original dynamics of the recorded sound signal, are too low fails.
  • the Freque ⁇ zabstand represents the current manipulated variable.
  • the narrowband filters required to demodulate the frequency difference do not allow rapid changes in the manipulated variable; furthermore, the frequency range provided for the control signal transmission in the S signal is not sufficiently free of interference in order to ensure reliable transmission with the small signal levels of the sound frequencies used. In the case of mobile reception in particular, interference due to multipath reception occurs in the relevant frequency range.
  • auxiliary carrier in the multiplex channel is suitable for an FM-FM signal;
  • identification signals for traffic radio transmitters and the data stream of the radio data system (RDS) are transmitted at 57 kHz and that further subcarriers are not acceptable to the radio subscriber because of the decoder expenditure on the receiver side.
  • the object of the invention is to provide a method for transmitting the control signal "variable dynamics" which, despite asynchronous data stream transmission, ensures the required synchronicity between the control signal and the program signal on the receiver side.
  • the method according to the invention is based on the consideration that the "variable dynamics" control signal does not leave the broadcasting studio at the same time as the program signal, but with a constant lead of, for example, 1000 ms.
  • This advance permits the following procedure, explains using an RDS data stream:
  • the RDS encoder on the transmitter receives the control signal and stores it. As soon as the RDS encoder has a free group (sequence of data bits), the digitized control signal is transmitted as a data packet in this group.
  • the 37 net bits available in a group could be used as follows:
  • the last-mentioned 5 bits indicate by how many ms the transmission in the RDS coder has been delayed or by how much of the lead time has been "used up". This information allows the recipient:
  • FIG. 2 shows a block diagram of a plant-side device for carrying out the method according to the invention
  • FIG. 3 shows a block diagram of a device modified from FIG. 2 for carrying out a variant of the method according to the invention
  • the device schematically illustrated with reference to FIG. 1 for carrying out the method according to the invention on the transmitter side shows a radio studio 10 in which a radio program signal 11 and an actuating signal "variable dynamics" 12 are generated.
  • the control signal 12 is derived from the program signal, as already explained at the beginning. It is essential that at or before the exit of the studio 10 there is a temporal delay of the program signal 11 with respect to the actuating signal 12, which is symbolized by a timer 13 with a constant delay time in FIG. 1. This delay means that the control signal 12 leads the assigned program section of the program signal 11.
  • 4a shows three program sections n.Y and n + 2 for an a ⁇ -taken time profile of a radio program + 1 gram signal, which have the same length in time.
  • control signal "variable dynamics" is derived from each program section n or n + 1, for example in the form of discrete samples.
  • the samples for each program 4c, digital sections are combined in digital form to form a data packet, the associated data packet beginning in the illustrated example at the time of the last sample value.
  • the program signal 11 and also the control signal 12 are transmitted to the transmitter site 16 via separate lines 14 and 15, respectively.
  • the transmitter location 16 comprises an FM-FM transmitter 17 and an RDS coder 18, the program signal 11 being supplied to the transmitter 17 and the leading control signal 12 being supplied to the RDS coder 18.
  • the RDS coder 18 inserts the data packets of the actuating signal 12 into its RDS data stream, delayed by a variable time .DELTA.t, as will be explained in more detail below with reference to FIGS. 4d and e or 4f and g.
  • the data stream stored in the RDS coder 18 contains a cyclic sequence of groups, in which groups VD are already provided for the insertion of the "variable dynamics" control signal.
  • the cycle illustrated in Figure 4d includes groups 0A, VD, 2A, 0A, VD, 6A, OA, VD, 6A, 2A, OA, VD, 6A and 6A.
  • the insertion of the data packets of the control signal assigned to the program sections ⁇ , n + 1 and ⁇ + 2 is shown in FIG. 4e. In this case, some of the groups VD kept free for the insertion of the control signal are omitted in the transmitted RDS data stream if there are no data packets to be inserted for these groups VD.
  • the next free group VD is therefore group no. 8, so that the insertion of the data packet n has to be waited until group no. 7 is completely sent.
  • the waiting times are different due to the structure of the stored RDS data stream and can be a maximum of the distance between two successive groups VD.
  • the advance of the control signal 12 compared to the assigned program signal section is reduced to the value ⁇ - ⁇ t. Since the program signal and the actuating signal must be synchronized in the receiver, the waiting times ⁇ t are recorded in the RDS coder 18 and transmitted in coded form in the relevant data packet.
  • the RDS data stream sent is fed from the RDS coder 18 to the transmitter 17, where it is transmitted on an auxiliary carrier in the multiplex area of the program signal in accordance with the standard.
  • the data packet n is inserted at the end of the group with the sequence number 4 in cycle 1, the data packet n + 1 at the end of the group with the sequence number 7 in cycle 2 and the data packet n + 2 at the end of the group with the serial number 9 in cycle 2.
  • This also results in waiting times .DELTA.tn, .DELTA.tn + 1. or .DELTA.tn + 2, which, however, are considerably shorter in comparison with the waiting times according to FIG. 4e.
  • the transmitted RDS data stream is separated from the radio program signal in the RDS-compatible receiver and fed to an RDS decoder 21, which demodulates and decodes the carried RDS data stream.
  • the decoded RDS data stream is transferred to stage 22 (which can also be part of decoder 21), where the "variable dynamics" control signal is separated and evaluated.
  • stage 22 which can also be part of decoder 21
  • the "variable dynamics" control signal is separated and evaluated.
  • the information about the waiting time .DELTA.t contained in each data packet is also recovered, which is used to control a subsequent buffer memory 23 for the "variable dynamics" control signal.
  • the control signal occurring at the output of the buffer memory 23 is again synchronous with the assigned signal section of the program signal, which is fed from the receiver 20 to a controlled amplifier 24.
  • the simultaneous control signal at the control unit of the regulated amplifier 24 changes the gain of the program signal in accordance with a manual input 25 of the amplifier 24, so that the program signal reproduced via loudspeaker 26 or headphones, as shown, dynamics according to the individual wishes of the listener or the manual ones Default at entrance 25 having. In this way, on the receiving side, the process steps according to FIGS. 4a to 4g.
  • FIG. 3 shows a further exemplary embodiment on the receiving side, which is based on the consideration that only a limited capacity for transmitting the control signal "variable dynamics" is available in an RDS transmission channel.
  • typical control signal curves are permanently stored in a receiver-side memory 27 which is provided instead of the buffer memory 23 according to FIG. 2.
  • a receiver-side memory 27 which is provided instead of the buffer memory 23 according to FIG. 2.
  • control signal values actually occurring at the limits of the program signal sections can be transmitted, which are stored in the memory 27 for plausibility checking and / or correction and / or for initialization when the device is switched on, when changing the program or when switching ⁇ signal failure to be used.
  • the capacity saving achieved with the aid of this alternative method is so great that each data packet can be transmitted twice in the RDS data stream, which means a significant increase in transmission security.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

Afin d'assurer l'adaptation individuelle de la dynamique des signaux d'une émission radiophonique ("variable dynamics"), un paramètre de réglage est dérivé des signaux correspondants de l'émission de radiodiffusion et émis avec les signaux de l'émission. Du côté de l'émission, le signal de réglage est utilisé pour sélectionner une dynamique de reproduction différente de la dynamique des signaux d'émission transmis. A des fins de transmission, le paramètre de réglage est inséré dans un courant de données, sous forme de signal numérique supplémentaire, puis transmis dans une zone dépourvue de signaux d'émission de la bande de transmission des signaux du programme radiophonique, de manière asynchrone par rapport à ceux-ci. L'insertion du signal numérique supplémentaire se fait par intermittence, sous forme de paquets de données, avec une avance variable par rapport à la section correspondante des signaux d'émission. Les différences temporelles variables entre les moments où les paquets de données sont insérés par intermittence et l'occurence des sections de l'émission sont transmises dans les paquets de données, sous forme d'informations temporelles séparées, et sont utilisées du côté récepteur pour synchroniser le signal de réglage en avance avec les signaux de l'émission.
EP19910911867 1990-06-30 1991-06-26 Procede de transmission d'un parametre de reglage variable dans le temps Withdrawn EP0538289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020932 1990-06-30
DE19904020932 DE4020932A1 (de) 1990-06-30 1990-06-30 Verfahren zum uebertragen einer sich zeitlich aendernden stellgroesse

Publications (1)

Publication Number Publication Date
EP0538289A1 true EP0538289A1 (fr) 1993-04-28

Family

ID=6409445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910911867 Withdrawn EP0538289A1 (fr) 1990-06-30 1991-06-26 Procede de transmission d'un parametre de reglage variable dans le temps

Country Status (8)

Country Link
EP (1) EP0538289A1 (fr)
JP (1) JPH05508758A (fr)
AU (1) AU655588B2 (fr)
CA (1) CA2084791A1 (fr)
CZ (1) CZ279940B6 (fr)
DE (1) DE4020932A1 (fr)
HU (1) HUT63018A (fr)
WO (1) WO1992000637A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004576C1 (fr) * 1990-02-14 1991-02-21 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen, De
US5740519A (en) * 1991-05-31 1998-04-14 Telefunken Method for the time-correlated transmission of a control signal and a radio program signal
US5666660A (en) * 1991-05-31 1997-09-09 Telefunken System for receiving a radio signal including multiple receiving units
EP0587626B1 (fr) * 1991-05-31 1997-08-06 Thomson Consumer Electronics Sales GmbH Procede de transmission radiophonique d'un signal de commande variable dans le temps et recepteur radiophonique pour la reception de ce signal de commande
GB9222972D0 (en) * 1992-11-03 1992-12-16 Thames Television Transmitting audio and data signals simultaneously
US6411235B1 (en) * 2000-06-23 2002-06-25 Adc Telecommunications, Inc. Dynamic range extension with gain correction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221880A1 (en) * 1973-03-14 1974-10-11 Radio Diffusion Tv Francaise Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal
ATE49495T1 (de) * 1985-09-06 1990-01-15 Rundfunkschutzrechte Gmbh Verfahren zum uebertragen von programmierungsinformationen fuer videoaufzeichnungsgeraete.
AU608242B2 (en) * 1986-09-11 1991-03-28 McGee, Ross Noel Broadcasting systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9200637A1 *

Also Published As

Publication number Publication date
CZ279940B6 (cs) 1995-09-13
WO1992000637A1 (fr) 1992-01-09
DE4020932A1 (de) 1992-01-09
CZ369792A3 (en) 1993-12-15
JPH05508758A (ja) 1993-12-02
CA2084791A1 (fr) 1991-12-31
AU655588B2 (en) 1995-01-05
HU9203809D0 (en) 1993-03-29
HUT63018A (en) 1993-06-28
DE4020932C2 (fr) 1992-04-16
AU8005991A (en) 1992-01-23

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