WO1996037980A1 - Radio that receives the audio from television programs - Google Patents

Radio that receives the audio from television programs Download PDF

Info

Publication number
WO1996037980A1
WO1996037980A1 PCT/IT1995/000113 IT9500113W WO9637980A1 WO 1996037980 A1 WO1996037980 A1 WO 1996037980A1 IT 9500113 W IT9500113 W IT 9500113W WO 9637980 A1 WO9637980 A1 WO 9637980A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio
radio receiver
frequency
channel
radio
Prior art date
Application number
PCT/IT1995/000113
Other languages
French (fr)
Inventor
Silvio Della Mattia
Marco Bassani
Original Assignee
Silvio Della Mattia
Marco Bassani
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 Silvio Della Mattia, Marco Bassani filed Critical Silvio Della Mattia
Priority to AU28978/95A priority Critical patent/AU2897895A/en
Publication of WO1996037980A1 publication Critical patent/WO1996037980A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • 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
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
    • 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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Definitions

  • the invention concerns the means for listening to and viewing television programs.
  • Radio- telephony is transmission of sounds, similarly made by radio waves, especially in musical, cultural and topical programs .
  • televised programs are far more numerous, polished and deep in content than radio programs, these latter however maintain their own particular character since they can be heard at any time while the listener is busy with other things, even while engaged on exacting activity such as driving cars or travelling in some other way, an advantage partly due to the fact that radios are small. It is thus inconceivable that the immense amount of audio sent out together with televised programs should be entirely lost by those who cannot see them for a variety of reasons. Not only is entertainment concerned but also news,various kinds of information and cultural programs.
  • the signal received from, the antenna is filtered, brought to audio frequency and then amplified.
  • the signal received from ' :the antenna is amplified in an ana ⁇ logue block and passed on to a converter which removes the frequency generated locally by an oscillator from the one received . Through the oscillator a selection is made of one only of the channels received from ' the antenna.
  • an intermediate amplifier will only amplify the signal equal to the frequency at which it has been set so as to choose one from among the many audiovisual channels received by the antenna.
  • the microprocessor in a digital unit that controls the ana ⁇ logue block is programmed for sending voltage to the oscillator, said voltage being converted to a frequency equal to that of the channel it is desired to receive less the value of the filter of the intermediate emplifier.
  • a binary signal containing the number of the selected channel is sent by the microprocessor to a decoder that controls a display for viewing the number of the selected channel.
  • a discriminator separates the mono o stereo audio signal from the carrier in radio frequency.
  • Amplifiers amplify the audio received from the discrimi ⁇ nator for controlling the loudspeakers, headsets or other amplifying devices plugged into sockets made for them. Automatic search for an active channel can be done by a push button.
  • Forward or backward channel selection can be made manually with a pair of push buttons.
  • Another push button is provided for respectively memorizing the various channels on the push buttons in a set.
  • the radio receiver described the audio of televised programs from television channels can be heard by means of audio amplifiers with loudspeakers, head sets or earphones.
  • This radio receiver can enter the field of popular electro ⁇ nic audio and may be used in a number of ways: in mobile audio equipment of the Walk-Man type receiving AM FM FM stereo radio waves only or else combined with others for recording and/or playing magnetic tapes, and with CD readers ; in HI-FI audio equipment used in the home combined with record players, recorders and/or players of magnetic tapes, AM FM FM stereo tuners and CD reacfers; in portable HI-FI audio equipment, either singly with its own sound system or in combination with AM FM FM stereo tu ⁇ ners, recorders and/or magnetic tape players and CD readers.
  • the invented circuit can be used together with these types of apparatus or with existing systems in order to make use of the amplifying and sound diffusion circuit.
  • Fig. 1 Structural and operational layout of the radio re- ceiving audio channels from televised programs.
  • Fig. 2 An electronic layout of the radio receiver in block form.
  • Fig. 3 Diagram to show the different applications.
  • Television audio channels are televised on channels that are entirely separate but adjacent to the video channels.
  • the audio channel carrier is modulated in radio frequency by means of the same systems as those used for ordinary FM radio broadcasts.
  • the main difference between televised audio and radio " bxoad- casts lies in the fact that while in the case of radio there is continuous selection of frequencies, in that of television it is spaced Out. A device is therefore needed for selecting the audio bands from the audio televised mixes.
  • the radio receiver 10 capable of picking up the audio in televised programs, substantially comprises an electronic circuit 11, an electric feeder 12, an antenna 13, an on-off switch 14, a UHF-VHF selector 15, a pair of push buttons 16 and 17 for backward or forward manual selection of channels, a push button 18 for automatic channel selection, a push button 19 for memorizing various channels out of a set 20 of ten buttons with which a channel can be memorized, a display 21 to show the channel selected.
  • This radio receiver circuit can be fitted into all the present types of radio receivers as seen by the layout in Fig.2 in which is shown the insertion of the circuit 11 into a car radio 50, a compact portable HI-FI 51, a household HI-Fi 52 and a Walk-Man 53 respectively.
  • the electronic circuit 11 comprises an analogue block 30 and a digital block 40.
  • the analogue block comprises a radio frequency amplifier 31, a converter 32, oscillator 33, intermediate amplifier 34, discriminator 35, amplifiers 36 and 37 and sockets 38.
  • the digital block 40 comprises a microprocessor 41, de ⁇ coder 42, display 21, push buttons 16, 17, 18, 19, a set of ten push buttons 20.
  • the antenna 13 receives the extremely weak television signals sent out by the transmitting stations and passes them to the analogue block 30.
  • the radio frequency amplifier 31 amplifies the signals received and passes them on to the convertor 32 which mathematically subtracts the frequency generated locally by the oscillator 33 from the frequencies received by 31.
  • the frequency at the - output of the converter 32 will be of only 10 Mhz. This process serves to lower the operational frequencies of successive electronic circuits, making it easier to realize them and also for selecting only one among the channels received from the antenna.
  • the intermediate amplifier 34 receives the audio from 32 while still very weak, and sharply amplifies only that one equal to the frequency at which it has been set. In this way one of the many television audio channels received from the antenna is selected.
  • the discriminator 35 separates the mono or stereo audio signals from the carrier in radio frequency.
  • the audio amplifiers 36 and 37 sufficiently amplify the audio signals received from 35 to allow them to operate loudspeakers, headsets or other amplifying devices con ⁇ nected to the sockets 38.
  • the digital block 40 serves for control of the analogue block 30.
  • the microprocessor 41 will be programmed so that, through the wire 39, it sends to the oscillator 33 a voltage that the oscillator can convert into a frequency the same as that of the channel it is desired to receive, less the filter value of the intermediate amplifier 34 (example: if channel twenty-eight is desired, ⁇ 532.75 Mhz, the oscillator must be set on 522.75).
  • the microprocessor 41 will send a binary signal ,contain ⁇ ing the number of the channel chosen, to the decoder 42 and this will operate the display 21 to show the number 22 of the chosen channel.
  • Push button 15 is used for automatic search of an active channel, while push buttons 16 and 17 are used for man ⁇ ual selection (backwards and forwards) of channels.
  • Push button 18 is used to select one of the previously memorized channels.
  • Push button 19 serves to memorize a channel on one of the push buttons in the set 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

Radio (10) that receives audio from television programs comprising a digital circuit (40) operated, for manual or automatic scanning, by a set of push buttons (16-20), that sends to the oscillator (33) in an analogue circuit (30) a certain voltage which a converter (32) transforms into a frequency equal to that of the channel it is desired to select from among those received from the antenna (13).

Description

RADIO THAT RECEIVES THE AUDIO FROM TELEVISION PROGRAMS
The invention concerns the means for listening to and viewing television programs.
Television is the well-known system of telecommunications in which programs with pictures and soun&are instantly transmitted over a distance by radio waves,and radio- telephony is transmission of sounds, similarly made by radio waves, especially in musical, cultural and topical programs . Though televised programs are far more numerous, polished and deep in content than radio programs, these latter however maintain their own particular character since they can be heard at any time while the listener is busy with other things, even while engaged on exacting activity such as driving cars or travelling in some other way, an advantage partly due to the fact that radios are small. It is thus inconceivable that the immense amount of audio sent out together with televised programs should be entirely lost by those who cannot see them for a variety of reasons. Not only is entertainment concerned but also news,various kinds of information and cultural programs.
All this imposes serious limitations on access by would-be listeners to entertainment or information but it also means that the use made of television productions is much less than it should be, a cause of considerable economic loss compared with what potential gains might be. With the above invention users can be far better served and the economic yield of televised programs be greatly increased, as will be explained below. Subject of the invention is a radio rece ver.' receiving' audio ■' frequency only of VHF and UHF televised programs by manual or automatic scanning.
The signal received from, the antenna is filtered, brought to audio frequency and then amplified. The signal received from':the antenna is amplified in an ana¬ logue block and passed on to a converter which removes the frequency generated locally by an oscillator from the one received . Through the oscillator a selection is made of one only of the channels received from' the antenna.
Among the signals received from the converter an intermediate amplifier will only amplify the signal equal to the frequency at which it has been set so as to choose one from among the many audiovisual channels received by the antenna. The microprocessor in a digital unit that controls the ana¬ logue block is programmed for sending voltage to the oscillator, said voltage being converted to a frequency equal to that of the channel it is desired to receive less the value of the filter of the intermediate emplifier. A binary signal containing the number of the selected channel is sent by the microprocessor to a decoder that controls a display for viewing the number of the selected channel. A discriminator separates the mono o stereo audio signal from the carrier in radio frequency.
Amplifiers amplify the audio received from the discrimi¬ nator for controlling the loudspeakers, headsets or other amplifying devices plugged into sockets made for them. Automatic search for an active channel can be done by a push button.
Forward or backward channel selection can be made manually with a pair of push buttons. Another push button is provided for respectively memorizing the various channels on the push buttons in a set. The invention offers evident advantages.
With the radio receiver described the audio of televised programs from television channels can be heard by means of audio amplifiers with loudspeakers, head sets or earphones. This radio receiver can enter the field of popular electro¬ nic audio and may be used in a number of ways: in mobile audio equipment of the Walk-Man type receiving AM FM FM stereo radio waves only or else combined with others for recording and/or playing magnetic tapes, and with CD readers ; in HI-FI audio equipment used in the home combined with record players, recorders and/or players of magnetic tapes, AM FM FM stereo tuners and CD reacfers; in portable HI-FI audio equipment, either singly with its own sound system or in combination with AM FM FM stereo tu¬ ners, recorders and/or magnetic tape players and CD readers. The invented circuit can be used together with these types of apparatus or with existing systems in order to make use of the amplifying and sound diffusion circuit.
By means of this invention an immense amount of material, some of it of very high quality and at present completely missed by those who cannot remain seated in front of a TV set, can be utilized.
The number of programs available to radio listeners is enormously increased to their great benefit, enabling maximum use to be made of televised material.
Characteristics and purposes of the invention will become still clearer from the following example of its execution illustrated by diagramma ically drawn figures. Fig. 1 Structural and operational layout of the radio re- ceiving audio channels from televised programs.
Fig. 2 An electronic layout of the radio receiver in block form. Fig. 3 Diagram to show the different applications. Television audio channels are televised on channels that are entirely separate but adjacent to the video channels. The audio channel carrier is modulated in radio frequency by means of the same systems as those used for ordinary FM radio broadcasts. The main difference between televised audio and radio "bxoad- casts lies in the fact that while in the case of radio there is continuous selection of frequencies, in that of television it is spaced Out. A device is therefore needed for selecting the audio bands from the audio televised mixes. The radio receiver 10, capable of picking up the audio in televised programs, substantially comprises an electronic circuit 11, an electric feeder 12, an antenna 13, an on-off switch 14, a UHF-VHF selector 15, a pair of push buttons 16 and 17 for backward or forward manual selection of channels, a push button 18 for automatic channel selection, a push button 19 for memorizing various channels out of a set 20 of ten buttons with which a channel can be memorized, a display 21 to show the channel selected. This radio receiver circuit can be fitted into all the present types of radio receivers as seen by the layout in Fig.2 in which is shown the insertion of the circuit 11 into a car radio 50, a compact portable HI-FI 51, a household HI-Fi 52 and a Walk-Man 53 respectively.
All these different types of apparatus can obviously be complete with AM FM FM stereo tuners, recorders and/or players of magnetic tapes, a reader of compact discs. The electronic circuit 11 comprises an analogue block 30 and a digital block 40.
The analogue block comprises a radio frequency amplifier 31, a converter 32, oscillator 33, intermediate amplifier 34, discriminator 35, amplifiers 36 and 37 and sockets 38. The digital block 40 comprises a microprocessor 41, de¬ coder 42, display 21, push buttons 16, 17, 18, 19, a set of ten push buttons 20.
Here follows a description of how it operates giving a few practical examples. The antenna 13 receives the extremely weak television signals sent out by the transmitting stations and passes them to the analogue block 30.
The radio frequency amplifier 31 amplifies the signals received and passes them on to the convertor 32 which mathematically subtracts the frequency generated locally by the oscillator 33 from the frequencies received by 31. Example: in Italy there are 69 television channels avail¬ able comprised between the 59 Mhz of the first VHF chan¬ nel and the 880 Mhz of the sixty-ninth UHF channel. If a television audio channel has a frequency of 59.25
Mhz of the first channel and if the local oscillator ge¬ nerates a frequency of 49.25 Mhz, the frequency at the - output of the converter 32 will be of only 10 Mhz. This process serves to lower the operational frequencies of successive electronic circuits, making it easier to realize them and also for selecting only one among the channels received from the antenna.
The intermediate amplifier 34 receives the audio from 32 while still very weak, and sharply amplifies only that one equal to the frequency at which it has been set. In this way one of the many television audio channels received from the antenna is selected.
Example: it is desired to receive two television channels on the antenna, channel one (59.25 Mhz) and channel three (87.65 Mhz) and only one channel is to be selected. To do this the local oscillator is adjusted onto the fre- quency of 49.25 Mhz. At the output of block 32, there will be two frequencies (59.25 - 49.25 =) 10 Mhz and 87.65 - 49.25 =) 38.4 Mhz that will be passed on to block 34 which can only amplify the frequencies close to 10 Mhz. Therefore, the channel one converted to 10 Mhz by block 32 will be amplified while channel three converted to a frequency nowhere near 10 Mhz will not be amplified. The discriminator 35 separates the mono or stereo audio signals from the carrier in radio frequency. The audio amplifiers 36 and 37 sufficiently amplify the audio signals received from 35 to allow them to operate loudspeakers, headsets or other amplifying devices con¬ nected to the sockets 38.
The digital block 40 serves for control of the analogue block 30. The microprocessor 41 will be programmed so that, through the wire 39, it sends to the oscillator 33 a voltage that the oscillator can convert into a frequency the same as that of the channel it is desired to receive, less the filter value of the intermediate amplifier 34 (example: if channel twenty-eight is desired, ^532.75 Mhz, the oscillator must be set on 522.75). The microprocessor 41 will send a binary signal ,contain¬ ing the number of the channel chosen, to the decoder 42 and this will operate the display 21 to show the number 22 of the chosen channel. Push button 15 is used for automatic search of an active channel, while push buttons 16 and 17 are used for man¬ ual selection (backwards and forwards) of channels. Push button 18 is used to select one of the previously memorized channels. Push button 19 serves to memorize a channel on one of the push buttons in the set 20.

Claims

1 . Rad i o re c e iv e r ( l θ ) characterized in that it receives the audio frequency only of VHF and UHF television programs with manual or automatic electronic scanning.
2. Radio receiver ( 10) as in claim 1 characterized in that the audio received from the antenna (13) is filtered, brought to audio frequency and amplified. 2. Radio receiver ( 10) as in claim 1 characterized in that the audio received from the antenna is amplified in an analogue circuit (30) comprising a con¬ verter (32) that subtracts , from the frequency received, the frequency generated locally by an oscillator (33) through which only one among the channels received from the antenna is selected, there being an intermediate amplifier (34) that, from among the audio from the converter, amplifies only that equal to the frequency at which said amplifier has been set so as to select one channel from among the many television audio channels received from the antenna. 4. Radio receiver ( 10) as in claim 3 characterized in that the microprocessor (41) in a digital circuit (40) that controls the analogue circuit (30), is programmed so as to send, to the oscillator (33), a voltage which the converter (32) transforms into a frequency equal to that of the channel it is desired to receive, less the filter value of the intermediate amplifier (34).
5. Radio receiver ( 10) as in claim 4 characterized in that the microprocessor (41) sends out a binary signal containing the number of the chosen channel to a decoder (42) that works a display (22) on which the number of the selected channel can be seen.
6. Radio receiver ( 10) as in claim 3, characterized in that a discriminator (35) separates the mono o stereo audio signal from the carrier in radio frequency.
7. Radio receiver ( 10) as in claims 3, 6 characterized in that the amplifiers (36,37) amplify the audio received from the discriminator (35) for operating loudspeakers, headsets or other amplifying devices on the various types of receiving apparatus (50-53) plugged into sockets (38). 8. Radio receiver ( 10) as in claim 1 characterized in that automatic search for an active channel is made using a push button ( 18).
9. Radio receiver ( 10) as in claim 1 characterized in that backward and forward manual se- lection of channels is made using a pair of push buttons ( 16, 17).
10. Radio receiver ( 10) as in claim 1 characterized in that a push button ( 19) enables the various channels to be memorized on a number of push buttons respectively ( 1-10) a set (20) of which is pro¬ vided .
PCT/IT1995/000113 1995-05-26 1995-07-05 Radio that receives the audio from television programs WO1996037980A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28978/95A AU2897895A (en) 1995-05-26 1995-07-05 Radio that receives the audio from television programs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MI001099A ITMI951099A1 (en) 1995-05-26 1995-05-26 AUDIO SIGNALS RADIO RECEIVER OF TELEVISION BROADCASTS
ITMI95A001099 1995-05-26

Publications (1)

Publication Number Publication Date
WO1996037980A1 true WO1996037980A1 (en) 1996-11-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1995/000113 WO1996037980A1 (en) 1995-05-26 1995-07-05 Radio that receives the audio from television programs

Country Status (3)

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AU (1) AU2897895A (en)
IT (1) ITMI951099A1 (en)
WO (1) WO1996037980A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959112A1 (en) * 1999-12-08 2001-06-13 Roman Schieferstein Multifrequency audio receiver for e.g. television set, has additional receiving module for television frequencies which is installed to receiver module of radio device

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE3815970A1 (en) * 1988-05-10 1989-11-23 Cohausz Helge B Transportable radio set
US4905303A (en) * 1988-07-05 1990-02-27 Johnson Jr John L Television audio signal converter
EP0396103A2 (en) * 1989-05-01 1990-11-07 Kabushiki Kaisha Toshiba Channel selecting apparatus
EP0470504A2 (en) * 1990-08-06 1992-02-12 Thomson Consumer Electronics, Inc. Fixed RF AGC of a television tuner for FM reception in a television receiver
EP0512374A1 (en) * 1991-05-06 1992-11-11 THOMSON multimedia Audio level equalization of television sound, broadcast FM and national weather service FM radio signals
EP0517237A2 (en) * 1991-06-07 1992-12-09 ELETTRONICA INDUSTRIALE S.p.A. Apparatus for receiving FM stereo radio signals, with associated data subcarrier,broadcast in the VHF and UHF bands in association with a conventional video signal
GB2271481A (en) * 1992-10-10 1994-04-13 Robert Francis Need Grazebrook Receiver for TV sound only which shares motorcar loudspeaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815970A1 (en) * 1988-05-10 1989-11-23 Cohausz Helge B Transportable radio set
US4905303A (en) * 1988-07-05 1990-02-27 Johnson Jr John L Television audio signal converter
EP0396103A2 (en) * 1989-05-01 1990-11-07 Kabushiki Kaisha Toshiba Channel selecting apparatus
EP0470504A2 (en) * 1990-08-06 1992-02-12 Thomson Consumer Electronics, Inc. Fixed RF AGC of a television tuner for FM reception in a television receiver
EP0512374A1 (en) * 1991-05-06 1992-11-11 THOMSON multimedia Audio level equalization of television sound, broadcast FM and national weather service FM radio signals
EP0517237A2 (en) * 1991-06-07 1992-12-09 ELETTRONICA INDUSTRIALE S.p.A. Apparatus for receiving FM stereo radio signals, with associated data subcarrier,broadcast in the VHF and UHF bands in association with a conventional video signal
GB2271481A (en) * 1992-10-10 1994-04-13 Robert Francis Need Grazebrook Receiver for TV sound only which shares motorcar loudspeaker

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Title
"FM Stereo/FM-AM Receiver STR-GX390", SONY USER MANUAL, 30 December 1992 (1992-12-30), pages 24 - 37 *
BANG W. ET AL: "NINE-BAND, 81-CHANNEL REMOTE-CONTROLLED BROADCAST RECEIVER", IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, vol. 24, no. 4, 4 November 1978 (1978-11-04), NEW YORK US, pages 566 - 570 *
BARENDRECHT J. ET AL: "VHF/UHF RECEIVER", ELEKTOR ELECTRONICS, vol. 19, no. 211, 30 May 1993 (1993-05-30), CANTERBURY GB, pages 62 - 69, XP000359349 *
GARSKAMP A.: "ICs for electronically-tuned car radios", ELECTRONIC COMPONENTS AND APPLICATIONS, vol. 9, no. 4, 30 April 1989 (1989-04-30), EINDHOVEN NL, pages 211 - 223, XP000159335 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959112A1 (en) * 1999-12-08 2001-06-13 Roman Schieferstein Multifrequency audio receiver for e.g. television set, has additional receiving module for television frequencies which is installed to receiver module of radio device

Also Published As

Publication number Publication date
ITMI951099A1 (en) 1996-11-26
AU2897895A (en) 1996-12-11
ITMI951099A0 (en) 1995-05-26

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