EP0746177A2 - Appareil pour la production de son à effet spatial à partir de signaux stéréophoniques d'une source audio - Google Patents

Appareil pour la production de son à effet spatial à partir de signaux stéréophoniques d'une source audio Download PDF

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Publication number
EP0746177A2
EP0746177A2 EP96107747A EP96107747A EP0746177A2 EP 0746177 A2 EP0746177 A2 EP 0746177A2 EP 96107747 A EP96107747 A EP 96107747A EP 96107747 A EP96107747 A EP 96107747A EP 0746177 A2 EP0746177 A2 EP 0746177A2
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EP
European Patent Office
Prior art keywords
sound
decoder
outputs
loudspeakers
connection
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Withdrawn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
EP96107747A
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German (de)
English (en)
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EP0746177A3 (fr
Inventor
Rudolf Clausonet
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Individual
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Individual
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Publication date
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Publication of EP0746177A2 publication Critical patent/EP0746177A2/fr
Publication of EP0746177A3 publication Critical patent/EP0746177A3/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/005—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo five- or more-channel type, e.g. virtual surround

Definitions

  • the invention relates to a device for generating matrix surround surround sound from stereo sound signals from stereo sound sources or for generating quasi-stereo effects from mono sound signals from mono sound sources, the sound sources such as televisions, video devices, hi-fi devices, car radios PC sound cards are connected to internal and / or external loudspeakers with amplifiers, containing a decoder designed as a phase shifter matrix space IC and a control device for the decoder as well as input sockets for connecting the sound sources and output sockets for connecting amplifiers Speakers.
  • a generic device for generating surround sound is described for example in DE-Z "ELRAD", edition 8/94, pages 80 to 84.
  • the circuit presented in this magazine is designed as a pure audio solution, with the decoder being controlled via analog control voltages.
  • the production of the spatial sound is based on the method, by means of electronic manipulation of the sound signals from a sound source prepared and mixed for the spatial sound, such as television or CD or the same, to control a plurality of suitably positioned loudspeakers with differently manipulated sound signals independently of one another, so that the sound conditions prevailing in real rooms are simulated and, for example, the characteristic reverberation is generated as a result of echo phenomena in a real listening room.
  • a sound source prepared and mixed for the spatial sound such as television or CD or the same
  • a disadvantage of this known device for generating surround sound is that it is always tailored specifically to certain sound source groups, such as television sets or hi-fi devices, and therefore does not permit universal use on any sound sources. Due to this special cut to the respective sound source, only the connection sockets specially matched to these sound sources are always provided, with a multiplicity of independently controlled loudspeakers, namely main loudspeakers and several additional effect loudspeakers, always being required to produce the surround sound. This large number of loudspeakers with their corresponding associated amplifiers on the one hand cause high acquisition costs, and on the other hand such a large number of loudspeakers cannot be integrated without problems in every living space without major changes to the living space furnishings. In addition, all outputs of the known device are manipulated to produce manipulated signals, so that there is a sound falsification on all outputs when transmitting the original signals, which has a fatal effect on the playback of signals not recorded in surround.
  • a circuit arrangement for signal processing is known from DE 33 90 117 T1, with which a signal similar to a stereo signal can be generated from a mono signal or a stereo signal that is more spatial can be generated from a stereo signal within certain limits.
  • the effects that can be generated with this device are based on rigid interactions of the components used in the electrical circuit used, but not can be influenced from the outside.
  • This known device leaves much to be desired in terms of its connection options, its controllability and the sound result.
  • the object of the invention is therefore to propose a device for generating surround sound which offers the greatest possible flexibility with regard to the types of sound sources which can be connected to the device and which enables the creation of surround sound even without the additional use of corresponding effect loudspeakers.
  • a device for generating surround sound as a control device for the decoder, a computer in the form of a microprocessor with an address part with an address buffer and a memory, reset part, remote control input for a remote control and, if appropriate, an additional memory, and to connect the computer via a data bus to connect the decoder, whereby the data bus is operated in multiplex mode.
  • a phase shifter matrix space IC (integrated circuit) with a corresponding operating voltage supply part is advantageously provided as a decoder.
  • Such ICs are known and commercially available, for example the IC, which is designed as a bipolar analog integrated circuit and has the trade name .mu.PC1853 from NEC Corporation. With the help of this IC, spatial information required for the spatial sound is generated or obtained from a stereo signal provided by a sound source.
  • this decoder is connected to a computer and controlled via this computer.
  • the computer is then able to control the decoder in such a way that the two loudspeakers which are present anyway for the stereo reproduction of the signals from the sound source are sufficient to generate a three-dimensional spatial sound.
  • a quasi-stereo effect can already be generated when the device according to the invention is connected to a mono sound source.
  • the decoder for generating the spatial sound is no longer controlled analog, but digitally with the aid of a digital system.
  • the device according to the invention has outputs for one effect speaker each to be arranged in the middle of the front and rear of the listener, so that the device according to the invention is already able to provide an all-round surround sound by controlling the decoder via the computer with a total of four speakers , commonly referred to as surround sound.
  • a sound source such as television sound or CD, is required, in the sound signals of which, in addition to the stereo signal, spatial sound signals are also mixed in, which the decoder controlled by the computer decrypts in accordance with the set specifications and outputs to the loudspeakers in different output signals.
  • At least the outputs for the right and left-hand front loudspeakers ie the main loudspeakers, according to sound, balance and volume, are provided to adapt the spatial sound provided by the device according to the invention to the respective acoustics of the listening room or the listening habits of the listener controllable.
  • the outputs for the front and rear effect speakers can also be in their Volume can be regulated so that an adaptation to different listening habits and room acoustics is possible.
  • outputs can be formed on the device according to the invention, to which further audio components, for example a cassette recorder for recording the sound signals of the sound source, can be connected.
  • Such recording outputs are advantageously not designed to be controllable in order to avoid losses and sound falsifications.
  • a microprocessor with an address part, a read-only memory in the form of an EEPROM, a reset part and a remote control input for a remote control and, if appropriate, an additional memory which stores the parameters set by the user of the decoder, such as volume, is preferably used as the computer for controlling the decoder for the spatial sound signals. Balance, effect type, sound, etc. is provided. In this way, a handy unit is created that can be accommodated in a suitable housing to save space and that any stereo or mono sound sources can be connected in order to achieve an all-round surround sound or stereo effects.
  • the invention proposes to provide a scart socket as the input socket for the sound signals from television and video devices.
  • the invention proposes to provide cinch sockets for audio signals from hi-fi devices, car radio and / or PC sound cards as input sockets. In this way, it is possible to connect almost all conceivable sound sources to the device according to the invention by appropriately designing the respective input sockets.
  • the invention also proposes various output sockets for the output signals output by the decoder to obtain the greatest possible connection flexibility on the device according to the invention. On the one hand, it is possible to route the output signals of the decoder to RCA sockets for the connection of loudspeakers operated via amplifiers.
  • the output signals of the decoder also be attributed to the scart socket already used as the input socket of the device according to the invention.
  • the output signals of the decoder also be attributed to the scart socket already used as the input socket of the device according to the invention.
  • the outputs for the right and left-hand front loudspeakers are connected to the scart socket via corresponding lines, and thus the loudspeakers installed in the television set are used as such right and left-hand front loudspeakers. Surprisingly, it turns out that even in this state it is possible to produce a spatial sound without additional effect loudspeakers.
  • a mechanical or electronic changeover switch is provided, which in one switch position switches the outputs for the right and left-hand front loudspeakers and in the other switch position the output for the front-side effect loudspeaker to the lines leading to the scart socket.
  • This special switch switches the internal loudspeakers and amplifiers of the device connected to the scart socket, for example a television set, "misused".
  • the internal stereo speakers of the connected television either as right and left-hand front speakers or as front-side effect speakers in mono mode.
  • the front effect speaker required for surround sound has the task of reproducing frequencies in the medium audio frequency band, i.e. mainly the speech of people.
  • This loudspeaker should be directly at (on, above, below, behind) the image source, since it would be very unnatural if you could see the people speaking on a television screen, but the spoken sound came from a different direction. Therefore, a special external front effect speaker that is placed under the television and an additional power amplifier to operate this speaker are generally required. This is a not inconsiderable cost factor, and the space for the loudspeaker must also be available.
  • the possibility proposed by the invention to use the loudspeakers installed in the television as front-side effect loudspeakers by correspondingly connecting the scart socket eliminates the need for an external front-side effect loudspeaker and secondly the additional power amplifier necessary for this. Furthermore, there is the advantage that the front effect speaker is attached at the optimal place, namely usually directly to the right and left of the screen of the television set.
  • the switch proposed according to the invention also makes it possible to use the television loudspeakers as right and left-hand front loudspeakers. It is thus possible to achieve a surround effect with only one television set and a surround decoder according to the invention with this special switching without additional hardware.
  • the decoder DC is connected to the output side of a sound source at its inputs E and has outputs A for the connection of loudspeakers operated by amplifiers.
  • loudspeaker in the sense of the invention always includes both active loudspeakers with integrated power amplifiers and passive loudspeakers operated via power amplifiers.
  • the decoder DC is connected to a computer that controls the decoder.
  • the computer is equipped with an address part with a read-only memory, a reset circuit RS and a memory SP and a display unit ANZ.
  • the computer has an input for the remote control FB. With this remote control, the computer can be controlled accordingly and this can control the decoder in terms of volume, balance and sound, optionally optionally.
  • the spatial effect effect to be created, the type of effect (e.g. simulating room shapes, music, movie, effect off), device on / off, physiological volume on / off and mute on / off can be set via the remote control.
  • the block diagram of the decoder is shown with its inputs and outputs.
  • the input side of the decoder is shown in FIG. 2a and the output side of the decoder in FIG. 2b, with both FIGS. 2a and 2b representing the entire block diagram of the decoder.
  • the decoder IC1 is designed, for example, as a phase shifter matrix space IC in the form of the commercially available ⁇ PC1853 chip from NEC Corporation. In order to connect a large number of possible sound sources as universally as possible, the decoder IC1 has on its input side according to FIG.
  • a scart socket with inputs E1 and E2 for connection to a suitable sound source for example a television or video device or a satellite receiver, and also has one Connection panel RCA2, which is equipped with inputs E3 and E4 with cinch sockets to enable the connection of suitable sound sources, such as hi-fi devices.
  • the device according to the invention with its inputs E3 and E4 is advantageously connected to the preamplifier output of one connected to the corresponding sound source Preamplifier.
  • sound sources such as car radios or the sound card of a computer.
  • the inputs E1, E2, E3, E4 are fed as inputs E5, E6 to the decoder IC1 according to FIG. 2b at its connections L in and R in via an input switch S1, which can also be designed electronically.
  • the letter L or R always stands for the left or right channel.
  • the decoder IC1 is connected via lines SDA and SCL to the computer controlling it, see also FIG. 3.
  • the decoder IC1 is connected to the power supply unit U1 as an operating voltage supply part with the connection UCC.
  • the power supply unit U1 also has further connection lines UCC for powering the computer and the display. If necessary, the power supply U1 can also be used with other power supplies, rectifiers, etc. be connected to the power supply.
  • the resistors R1 to R5 and capacitors C1 to C29 associated with the decoder IC1 are also shown in FIG. 2b.
  • the integrated components arranged on the decoder IC1 and not shown here for the sake of simplicity require further connections, which are explained below.
  • the connections FC1 to FC4 represent phase shifters for various time-of-flight systems for generating surround sound.
  • the connections MF0, MFI form a high-pass filter for the surround simulation, the connections LF1, LF2 are provided for a low-pass filter.
  • the connection of the RTC, RBC, LTC, LBC connections determines the characteristics of the treble setting T and the bass setting B, each separately for left L and right R.
  • the capacitors C13 and C14 on the VOL C and BAL C connections are used to suppress interference in the D / A converter for volume (volume VOL C) or balance (BAL C). At the The OFC connection compensates the offset voltage of the phase shifters.
  • the outputs for the input signals manipulated by decoder IC1 are shown in FIG. 2b on the right side of decoder IC1 and labeled L1 out, R1 out, L2 out, R2 out, rear out and L + R out. It is provided that the two front stereo speakers are connected as main speakers to the connections L1 out and R1 out.
  • a three-dimensional surround sound can already be generated.
  • two additional effect speakers can be connected to achieve the surround surround sound, namely a front center speaker, which is acted upon by the sum of the left and right channel of the sound signal, can be connected to the L + R out connector and a rear speaker that connects to the Connection rear out can be connected.
  • the device according to the invention By means of appropriate manipulations on the part of the decoder IC1 on the input signals of the sound source connected to E5 and E6, the device according to the invention generates at these outputs the signals modified to achieve the simulated stereo sound or the signals obtained to achieve the surround surround sound. It is also provided that the outputs L1 out and R1 out for the front main speakers can be regulated in terms of volume, balance and timbre (highs / lows), while the outputs L + R out and rear out for the effect speakers can only be adjusted in terms of volume are adjustable.
  • connection field RC1 which is provided with cinch sockets, for example, and enables the loudspeaker connection.
  • other parallel connections for example as terminal connections, for outputs such as L + R out and Rear out as well as L1 out and R1 out be provided to offer the greatest possible flexibility for the connection of the speakers.
  • the outputs L1 out and R1 out for the main speakers and L + R out for the front effect speaker are also connected to a switch S2, which depending on the switch position either outputs L1 out and R1 out or the connection L + R out via output lines A1 and A2 leads back to the scart socket RCA3 in order, for example, to use the loudspeakers built into a television set connected thereto, the sound signals of which have previously been given to the decoder IC1 via the inputs E1 and E2 from the scart connection RCA3 of the device according to the invention. It is then possible to operate the loudspeakers installed in the TV set connected to the RCA3 socket as right and left-hand front loudspeakers using the outputs L1 out and R1 out or as front effect loudspeakers using the output L + R out.
  • the special signal L + R out coming from the surround decoder C1 for the front effect speaker is switched to the scart socket via the switch S2 (mechanical or electronic).
  • the switch position "off” the original stereo signal (or mono signal) or the surround signal L1 out, R1 out is switched to the scart socket.
  • the switch is set to "on”
  • the signal L + R out (mono) of the surround signal is switched through to the scart socket, the two stereo speakers on the television now reproduce the sound of the front effect speaker in mono mode.
  • the television sound is fed via the scart cable into the surround decoder IC1, processed accordingly and returned as surround sound to the television set via the same cable and output from its loudspeakers.
  • the decoder IC1 also has further outputs L2 out and R2 out, which are connected via corresponding output lines A3 and A4 to a connection field RCA2, on which Via cinch sockets there or other suitable means, for example a cassette recorder, for recording the signals of the sound source connected to the inputs E5 and E6 can be connected.
  • a connection field RCA2 on which Via cinch sockets there or other suitable means, for example a cassette recorder, for recording the signals of the sound source connected to the inputs E5 and E6 can be connected.
  • the decoder according to the invention can also be connected to a sound source of a hi-fi system via the output lines A3 and A4, the preamplifier output of which cannot be assigned to the inputs E3 and E4 of the device according to the invention due to the lack of corresponding connections.
  • the invention achieves the greatest possible variety of connections to almost any sound sources and enables with little effort, namely only two main speakers, the generation of a surround sound, which can be expanded to surround surround sound by only two additional effect speakers, with existing speakers in sound sources , like TV, can be used.
  • a standard computer is used as the computer, for example with commercially available ICs, which is equipped with a reset circuit RS and is connected via the connection UCC to the operating voltage supply part of the decoder IC1, see FIG. 2, for the voltage supply.
  • the computer is further equipped with an address part address, which contains an address buffer IC4 and an EPROM read-only memory IC3.
  • the computer IC2 is connected to the decoder IC1 according to FIG. 2 via a bus connection.
  • the connections with lines SDA and SCL together with ground form this data and address bus known as "I 2 C-Bus".
  • a memory SP with an integrated circuit IC5 can be connected to the computer IC2 via the lines SCL and SDA.
  • the input for the remote control is labeled FB IN on the computer.
  • the associated resistors R and capacitors C are identified by numbers.
  • the connections P1.3, P1.4, P1.5, P1.6, P1.7 are routed via corresponding lines to the front panel of the device for controlling corresponding display elements, as can be seen in FIG. 4.
  • the reference symbol Q1 in FIG. 3 denotes a quartz crystal which has the task of generating the system clock of the computer.
  • the IC4 is a type 74 address buffer (HCT573). It temporarily stores the addresses output by the computer IC2 (80C31 or 80C32 or 80C51 or 80C52) when accessing the memory IC3 (27C64 or 27C128), since the data and address bus of the computer is operated in multiplex mode and therefore intermediate storage is necessary is.
  • the additional memory IC5 (PCF8570 or 24C01 or similar) records the parameters set by the user of the decoder, such as volume, balance, effect type, sound, etc.
  • the IC5 memory is advantageously a so-called EEPROM, which stores the data permanently without an additional power supply (battery, rechargeable battery) and is also connected to the I 2 C bus.
  • the remote control receiver FB gives the signals of the remote control represented by arrows P to an input FB IN of the computer, so that the latter the corresponding control processes (volume, sound, effect type, etc.) for the decoder IC1 via its connection by means of the I 2 C bus can make digital.
  • the display means ANZ are shown in FIG. 4 to show the state of the decoder.
  • This display means ANZ are advantageously mounted on a front panel together with the remote control receiver FB.
  • the display means ANZ is equipped with the connections P1.3 to P1.7 to the computer, see FIG. 3, which lead to the light-emitting diodes LED1 to LED6 via resistors R11 to R17 and transistors T1 to T5.
  • An OSD (ON SCREEN DISPLAY) is also optionally available.
  • the data required to display the operating status are displayed on a standard color television set.
  • the board of the OSD module uses a standard ⁇ PC6454 module.
  • the OSD module is then advantageously located on the main board of the decoder, whereas the front board with LED and / or LCD display is mounted on the front of the housing behind a front panel.
  • the device according to the invention offers the greatest possible variability in terms of its connections and can be used universally on almost all possible sound sources and the room sounds to be generated via appropriate software of the computer controlling the decoder.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
EP96107747A 1995-06-02 1996-05-15 Appareil pour la production de son à effet spatial à partir de signaux stéréophoniques d'une source audio Withdrawn EP0746177A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29509157U 1995-06-02
DE29509157U DE29509157U1 (de) 1995-06-02 1995-06-02 Gerät zur Erzeugung von Raumklang aus Stereosignalen von Tonquellen

Publications (2)

Publication Number Publication Date
EP0746177A2 true EP0746177A2 (fr) 1996-12-04
EP0746177A3 EP0746177A3 (fr) 1998-03-25

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EP96107747A Withdrawn EP0746177A3 (fr) 1995-06-02 1996-05-15 Appareil pour la production de son à effet spatial à partir de signaux stéréophoniques d'une source audio

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EP (1) EP0746177A3 (fr)
DE (2) DE29509157U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009040854A1 (fr) * 2007-09-11 2009-04-02 Meccanicca Generale S.R.L. Tambour en forme de tronc de cône destiné à des lave-linge ou à des sèche-linge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944735A (en) * 1974-03-25 1976-03-16 John C. Bogue Directional enhancement system for quadraphonic decoders
GB2204754A (en) * 1987-05-08 1988-11-16 Rca Licensing Corp Component audio/video system with automatic turn-off of peripheral devices
EP0500049A1 (fr) * 1991-02-19 1992-08-26 Canon Kabushiki Kaisha Appareil d'enregistrement et système d'enregistrement/de reproduction
DE4219994C1 (fr) * 1992-06-22 1993-07-29 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover, De
EP0607810A1 (fr) * 1993-01-22 1994-07-27 EDICO S.r.l. Procédé d'accord et de mémorisation, compatible avec une pluralité de récepteurs de signaux de télévision

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944735A (en) * 1974-03-25 1976-03-16 John C. Bogue Directional enhancement system for quadraphonic decoders
GB2204754A (en) * 1987-05-08 1988-11-16 Rca Licensing Corp Component audio/video system with automatic turn-off of peripheral devices
EP0500049A1 (fr) * 1991-02-19 1992-08-26 Canon Kabushiki Kaisha Appareil d'enregistrement et système d'enregistrement/de reproduction
DE4219994C1 (fr) * 1992-06-22 1993-07-29 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover, De
EP0607810A1 (fr) * 1993-01-22 1994-07-27 EDICO S.r.l. Procédé d'accord et de mémorisation, compatible avec une pluralité de récepteurs de signaux de télévision

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009040854A1 (fr) * 2007-09-11 2009-04-02 Meccanicca Generale S.R.L. Tambour en forme de tronc de cône destiné à des lave-linge ou à des sèche-linge

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DE29608812U1 (de) 1996-07-25
DE29509157U1 (de) 1995-09-21
EP0746177A3 (fr) 1998-03-25

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