EP0712264A2 - Méthode et appareil pour la reproduction de son à plusieurs canaux - Google Patents

Méthode et appareil pour la reproduction de son à plusieurs canaux Download PDF

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Publication number
EP0712264A2
EP0712264A2 EP95113420A EP95113420A EP0712264A2 EP 0712264 A2 EP0712264 A2 EP 0712264A2 EP 95113420 A EP95113420 A EP 95113420A EP 95113420 A EP95113420 A EP 95113420A EP 0712264 A2 EP0712264 A2 EP 0712264A2
Authority
EP
European Patent Office
Prior art keywords
signals
input
channel
surround
matrix
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.)
Granted
Application number
EP95113420A
Other languages
German (de)
English (en)
Other versions
EP0712264B1 (fr
EP0712264A3 (fr
Inventor
Peter Dipl.-Ing. Fels
Ulf Dipl.-Ing. Wüstenhagen
Gerhard Dipl.-Ing. Steinke
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 Telekom AG
Original Assignee
Deutsche Telekom AG
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 Deutsche Telekom AG filed Critical Deutsche Telekom AG
Publication of EP0712264A2 publication Critical patent/EP0712264A2/fr
Publication of EP0712264A3 publication Critical patent/EP0712264A3/fr
Application granted granted Critical
Publication of EP0712264B1 publication Critical patent/EP0712264B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/307—Frequency adjustment, e.g. tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/40—Visual indication of stereophonic sound image

Definitions

  • the invention relates to a method of the type described in the preamble of claim 1 for processing multichannel source-oriented sound signals of a sound event, which can also be recorded, transmitted and matriculated between recording and playback, for the purpose of changing these signals before final amplification and radiation via a Loudspeaker arrangement with at least three front and two surround loudspeakers and a device suitable for this purpose, which is defined in more detail in the preamble of claim 4.
  • Such systems and associated display devices are described in ITU-R (formerly CCIR) recommendation BS.775 as well as in SMPTE standard PR 173 (1992) for a 3 / 2- or 3 / 4- or 3/2 / 1 system described.
  • Two-channel stereo playback devices have so far been used predominantly for playback in living rooms and in small to medium-sized event or listening rooms, also in connection with image representations. With two-channel stereo playback, however, there was previously only a very small, tubular stereo listening zone with only one reference point. Another disadvantage of two-channel stereo playback is the imaging of a center signal with limited sound and location quality, which is only possible through the formation of phantom sources.
  • Sound signal reproduction so perfected shows an improvement in the reproduction quality with regard to the imaging of now three (or more) front information and regarding the spatial information within a slightly enlarged listening zone.
  • the main effect of the invention is the enlargement of the stereo listening zone shown in FIG. 1 while maintaining the complex auditory impression to be achieved, which was reduced to a single reference point in the previous two-channel stereophonic system and in the standardized multichannel sound arrangement (3/2 arrangement). allows only a small enlargement of the listening zone, taking into account the standard arrangement.
  • a further significant advantage in the application of the invention results from the placement of the loudspeakers in the respective individual reproduction area, which is not rigidly bound to the standard arrangement.
  • the inputs of the input stages (1-n) are thus connected to the outputs of a multi-channel receiver or other single- or multi-channel program sources.
  • the outputs of these input stages are connected to the inputs of the input matrix EM.
  • This distributes the existing input signals over the connections to the functional units FD, so that each FD receives n-1 of the available input signals.
  • the (n-1) outputs of each FD are connected to the inputs of a summing stage SE.
  • An unprocessed input signal reaches each summing stage via a direct connection between the input matrix EM and each summing stage SE, so that a summing signal can be formed from the n input signals in each SE.
  • the outputs of the summing stages SE - which contain the possibility of controllable level influencing on the output side - are connected to the output matrix AM, so that they are connected to the existing connected playback channels, ie to the inputs of the power amplifiers and via the output matrix can be assigned to the corresponding playback channels.
  • a conversion matrix KM which distributes the existing input signals to the input matrix EM, can lie in front of the input matrix EM according to FIG. 3 in addition to this functional complex.
  • the outputs of the input stages E are connected to the inputs of the conversion matrix KM and their outputs to the corresponding inputs of the input matrix EM.
  • a filter unit FE-1 can be connected to the outputs of the input stages E in accordance with FIG. 4 in order to produce a separate bass channel.
  • the low-frequency signal components are filtered out, summed and assigned to a separate low-frequency channel via a low-pass circuit from the existing input signals, preferably the three front signals.
  • a further filter module FE-2 of the output matrix can be connected downstream of the output matrix for the playback channels, as already practiced in stereo playback in high-quality home playback systems (FIG. 4).
  • An input unit EA must be assigned to this special device to acoustically optimize this playback arrangement to the existing room conditions, locations of the loudspeakers and the desired listening zone. This enables the location of the speakers, their parameters, the existing room conditions and the desired listener positions to be entered, as well as the possibility of correcting and adjusting the conditions between direct information and desired room information (R / D) depending on the program material.
  • this input arrangement EA is connected to the individual assemblies of the entire device and controls the variably adjustable parameters of the individual assemblies. It automatically calculates parameters based on the entered room and location parameters and assigns them to the corresponding modules.
  • a display is provided as a supplement to the input arrangement.
  • the signal flow for a 5-channel program can be explained as follows:
  • the signals pass from the source (transmission channel, multi-channel recording, etc.) to the input stages E of this special device. They are distributed to the existing functional units FD by means of the input matrix in such a way that four of these 5 available input signals are assigned to each FD, so that one signal in each FD is not one Parameter correction is subjected. (In the first FD, the first signal is switched unprocessed to the subsequent summing stage SE, in the second FD the second, etc.).
  • the four signals treated differently in terms of level, transit time and phase and the untreated signal in each case are summed again and the level is corrected together.
  • these sum signals are assigned to the existing playback channels and the loudspeakers connected to them with their power levels in accordance with their function definition (front loudspeaker surround loudspeaker).
  • the functional units FD can be expanded in such a way that they enable a parameter change for all input channels, so that a sum of all available and treated input signals is created for each playback channel (FIG. 6). If a filter device FE-1 is connected downstream of the input stages, the low-frequency components of the individual unprocessed source signals are filtered out, summed in the SE and assigned to a separate woofer channel, which supplies a special woofer with a corresponding power unit via a level correction unit.
  • the placement of the loudspeakers which does not always conform to the standard, and the optimal location of the listener, which can hardly be maintained in practice, as well as the spatial home conditions, require in most applications a frequency response correction of the loudspeakers adapted to the respective room and the desired listening zone and, if necessary, a runtime correction of the playback channels depending on their Location. The latter can be done in the FD.
  • the signals at room correction filter modules FE-2 can be switched between the output matrix AM and the inputs of the power amplifiers of the playback channels for a necessary spatial adaptation of the frequency response.
  • the deviations from a standard list can be corrected by entering the location parameters in the input unit. By entering further parameters such as loudspeaker data, listening zone or listener positions, etc., volume ratios can be corrected and the listening conditions outside of an optimal listener position, in particular in the preferred range (preferred listener position) of the user, can be optimized.
  • the relationship between the direct component and the surround component can also be changed depending on the program material by entering appropriate correction values in the existing input unit, stored and retrieved in association with the current program.
  • this device also for the reproduction of program material with less than five audio channels is made possible by the conversion matrix KM connected upstream of the input matrix EM.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
EP95113420A 1994-11-09 1995-08-26 Méthode et appareil pour la reproduction de son à plusieurs canaux Expired - Lifetime EP0712264B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440014A DE4440014C2 (de) 1994-11-09 1994-11-09 Verfahren und Vorrichtung zur mehrkanaligen Tonwiedergabe
DE4440014 1994-11-09

Publications (3)

Publication Number Publication Date
EP0712264A2 true EP0712264A2 (fr) 1996-05-15
EP0712264A3 EP0712264A3 (fr) 1999-08-18
EP0712264B1 EP0712264B1 (fr) 2003-11-12

Family

ID=6532876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113420A Expired - Lifetime EP0712264B1 (fr) 1994-11-09 1995-08-26 Méthode et appareil pour la reproduction de son à plusieurs canaux

Country Status (4)

Country Link
US (1) US5703955A (fr)
EP (1) EP0712264B1 (fr)
AT (1) ATE254383T1 (fr)
DE (2) DE4440014C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7415116B1 (en) 1999-11-29 2008-08-19 Deutsche Telekom Ag Method and system for improving communication in a vehicle

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052992C2 (de) * 2000-10-19 2002-11-07 Deutsche Telekom Ag Verfahren für die raumgerechte Wiedergabe von Toninformationen bei Videokonferenzen
US20040086130A1 (en) * 2002-05-03 2004-05-06 Eid Bradley F. Multi-channel sound processing systems
DE10300507A1 (de) * 2003-01-08 2004-07-22 Pmc Gmbh Fernbedienungsnachrüstung von Subwoofern
US6937737B2 (en) * 2003-10-27 2005-08-30 Britannia Investment Corporation Multi-channel audio surround sound from front located loudspeakers
JP4396646B2 (ja) * 2006-02-07 2010-01-13 ヤマハ株式会社 応答波形合成方法、応答波形合成装置、音響設計支援装置および音響設計支援プログラム
US20100135509A1 (en) * 2008-12-01 2010-06-03 Charles Timberlake Zeleny Zeleny sonosphere
US9613640B1 (en) * 2016-01-14 2017-04-04 Audyssey Laboratories, Inc. Speech/music discrimination
EP3797528B1 (fr) * 2018-04-13 2022-06-22 Huawei Technologies Co., Ltd. Génération de zones sonores à l'aide de filtres à étendue variable
US11996012B2 (en) 2021-02-03 2024-05-28 Better Way Productions LLC 360 degree interactive studio
US11431920B2 (en) * 2021-02-03 2022-08-30 Better Way Productions LLC 360 degree interactive studio

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413181A1 (de) 1983-12-14 1985-06-27 Deutsche Post Rundfunk- und Fernsehtechnisches Zentralamt, DDR 1199 Berlin Grossraumbeschallungssystem

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NL172815B (nl) * 1971-04-13 Sony Corp Meervoudige geluidweergeefinrichting.
DE2143044A1 (de) * 1971-08-27 1973-03-01 Standard Elektrik Lorenz Ag Verfahren zur quasiquadrophonischen wiedergabe von zweikanaligen stereosignalen
US4589129A (en) * 1984-02-21 1986-05-13 Kintek, Inc. Signal decoding system
JPH0744759B2 (ja) * 1987-10-29 1995-05-15 ヤマハ株式会社 音場制御装置
DE68921517T2 (de) * 1988-07-20 1996-01-25 Sanyo Electric Co Tonwiedergabegerät.
US5172415A (en) * 1990-06-08 1992-12-15 Fosgate James W Surround processor
JPH04150200A (ja) * 1990-10-09 1992-05-22 Yamaha Corp 音場制御装置
JP3108087B2 (ja) * 1990-10-29 2000-11-13 パイオニア株式会社 音場補正装置
GB9103207D0 (en) * 1991-02-15 1991-04-03 Gerzon Michael A Stereophonic sound reproduction system
US5199075A (en) * 1991-11-14 1993-03-30 Fosgate James W Surround sound loudspeakers and processor
DE4310105A1 (de) * 1993-03-27 1994-09-29 Blaupunkt Werke Gmbh Raumklangprozessor

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3413181A1 (de) 1983-12-14 1985-06-27 Deutsche Post Rundfunk- und Fernsehtechnisches Zentralamt, DDR 1199 Berlin Grossraumbeschallungssystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7415116B1 (en) 1999-11-29 2008-08-19 Deutsche Telekom Ag Method and system for improving communication in a vehicle

Also Published As

Publication number Publication date
DE59510828D1 (de) 2003-12-18
DE4440014C2 (de) 2002-02-07
DE4440014A1 (de) 1996-05-15
US5703955A (en) 1997-12-30
ATE254383T1 (de) 2003-11-15
EP0712264B1 (fr) 2003-11-12
EP0712264A3 (fr) 1999-08-18

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