EP3090575A2 - Procédé de reproduction audio dans un système de son à plusieurs canaux - Google Patents

Procédé de reproduction audio dans un système de son à plusieurs canaux

Info

Publication number
EP3090575A2
EP3090575A2 EP14851410.2A EP14851410A EP3090575A2 EP 3090575 A2 EP3090575 A2 EP 3090575A2 EP 14851410 A EP14851410 A EP 14851410A EP 3090575 A2 EP3090575 A2 EP 3090575A2
Authority
EP
European Patent Office
Prior art keywords
signals
channels
listening
generated
output signals
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
EP14851410.2A
Other languages
German (de)
English (en)
Other versions
EP3090575B1 (fr
Inventor
Gunnar Kron
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.)
Kronoton GmbH
Original Assignee
Kronoton 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 Kronoton GmbH filed Critical Kronoton GmbH
Publication of EP3090575A2 publication Critical patent/EP3090575A2/fr
Application granted granted Critical
Publication of EP3090575B1 publication Critical patent/EP3090575B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3654—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with energy coupler, e.g. coupler for hydraulic or electric lines, to provide energy to drive(s) mounted on the tool
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • 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 
    • H04S5/02—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 four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic

Definitions

  • the invention relates to a method for audio reproduction in a multi-channel sound system with two input signals L and R, in which output signals for different listening levels are generated.
  • CONFIRMATION COPY Complex speaker configuration and thus a corresponding increased number of output signals is required to generate the desired three-dimensional sound space.
  • a loudspeaker configuration in a 9.1 three-dimensional sound system which is suitable for a home theater, for example, consists of ten loudspeakers, which in turn requires a corresponding number of output signals for the lower and upper listening levels.
  • the invention provides that only a lower hearing level and only one upper hearing level are generated, wherein a maximum of six output signals are generated with a maximum of two output signals for the lower listening level and ma- ximal four output signals for the upper listening level.
  • the core idea of the invention is to provide a method which, while generating a minimum number of output signals, can reflect a three-dimensional audio reproduction and at the same time covers both the mono and the stereo region.
  • the invention also provides software residing on a signal processor, i. ported on the signal processor.
  • the software contains an algorithm which is processed by the signal processor, the algorithm detecting the method.
  • FIG. 12 shows a device into which a method according to the invention according to the embodiment in FIG. 11 is integrated.
  • FIG. 1 shows a conventional three-dimensional audio reproduction in a larger space 2 occupied by a listener 3 in the context of a 9.1 surround sound format.
  • a plurality of loudspeakers of a loudspeaker arrangement 5 are distributed, the lower and higher listening levels 4a, 4b, 5a, 5b are assigned.
  • the upper listening level 4a with two loudspeakers with the left higher signal LHI and the right one higher signal Rm than output signals.
  • the lower listening level 5a having four loudspeakers with the left signal L, the channel C (center), the right channel R and the channel LFE (Low Frequency Effect) as output signals.
  • the upper listening level 4b with two speakers with the left higher surround signal SL.W and the right higher surround signal Saw as output signals.
  • the lower listening level 5b with two speakers with the two surround signals SL, SR as output signals.
  • the signals in the lower and upper listening levels 4a, 4b, 5a, 5b are distributed to the loudspeakers, they have been processed in the context of a multi-channel sound system and on the basis of the input signals R and L by an audio processor provided for this purpose.
  • Fig. 2 shows the inventive method, starting from the two input channels R and L via linear and parallel channels guided 8.9 the output signals R and L in the lower listening plane 7 and in the upper listening plane 6, the left output signal ü-n and generated right output signal RHI, so that four output signals, two for the upper and two for the lower Hörrebene generated.
  • the method is a signal processor in the form of an audio processor, on which there is a software.
  • the software contains an algorithm which is processed by the signal processor, the algorithm detecting the method.
  • Three channels are first decoded from the two input signals L and R and formed parallel to the channels 8, 9 which are guided linearly to the output. This produces the upper listening plane 6, while the channels 8, 9 which are guided linearly to the output form the lower listening plane 7.
  • the channels RL and RR map the premises and rejections within the input signals L, R, whereas the channel C (center channel) maps the addition of both input channels L, R. This makes it possible to further process the input signals L, R, if it is a mono signal. If a mono signal is present at the input, the channels RL and RR remain silent and the channel C carries on the signal information and thus makes further signal processing possible.
  • the channel RR is fed to the signal detector 10. This outputs the control signal "1" when the signal strength of RR drops below the selected threshold level and the control signal "0" when the level of the channel RR exceeds the selected one
  • Threshold level increases.
  • the threshold level is -20dB and the response time (trigger) is zero seconds.
  • the control signals of the signal detector 10 are multiplied by the signal multiplier 1 1 with the signal of the center channel. If there is no detected signal in the channel RR, so that no stereo signal in the channels RL and RR above or equal to the signal strength determined by the threshold level is present and the signal detector 10 generates the control signal "1", the channel C is multiplied by "1" and fed to further processing. If a detected signal is present in the channel RR, so that a stereo signal in the channels RL and RR is above or equal to the signal strength determined by the threshold level and the signal detector 10 generates the control signal "0", the channel C is set to "0". multiplied and not released for further processing, since the signal is equal to zero, so that it is unequivocally detected whether a stereo signal is present.
  • a phase correction is performed to convert the signal from the channels RL and RR in a phase-pure stereo signal. This is achieved by using a delay 12 in the channel RR.
  • the channel RR is delayed to the channel RL so that the phases of both channels in a non-phase-rotated audio signal in stereo to each other.
  • the delay time is 140 samples with a clock rate of 48khz and 16bit.
  • the C channel is also readjusted in phase by a delay 3, which is applied to the channel CR, after the channel C (L + R) after the Signal multiplier 1 1 has been split into the channels CL and CR and so has been continued in dual-mono channels.
  • the channel C is a pure mono channel and can be converted by the splitting into the two duo mono channels CL and CR and the delay of the channel CR to CL by a delay in a stereo signal with a phase correlation above 0.
  • the encoding as a further method step sums the stereo signal of the channels RL, RR with the stereo signal of the channels CL, CR to the channels Lt, Rt in such a way that the channels RL and CL form the channel Lt and the channels CR and RR form the channel Rt ,
  • the summation is accompanied by a level adjustment at the level controls 15, 16, 17, 18, since the levels of the newly formed channels Lt, Rt increase by the described summation of the channels RL, RR with CL, CR.
  • the level adjustment lowers the levels RL, RR, CL, CR accordingly, so that it can not come to override by their summation.
  • the signals Lt, Rt are further adjusted as shown in FIG. 2 in the context of the master section to their later use in its frequency responses via the equalizers 19, 20
  • the Lt, Rt signals appear farther from the original sound source, and the effect of the sound emission can be mimicked by a frequency response, the further away it is from the original one Sound source to the top, the more, for example, the upper frequencies can be lowered by a low-pass filter. It is also possible by the frequency adjustment to tune the sound result optimally to the speaker or speakers, which emits the output signals Un, RHI later.
  • a compression stage is inserted into the master section as shown in Fig. 2.
  • the adjustment of the compressor 22 or a limiter ensures in that the signal is smoothed such that the sound peaks can be intercepted and the quieter parts of the audio signal Lt.Hi, Rt.Hi can be raised, which enhances the auditory impression of the diffused and distant sound, since sound peaks preferably occur and decrease near a sound source the further the receiving microphone is moved upwardly therefrom, and the compression of the ratio allows the dynamics of the L, R channels in the lower listening plane 7 to be adjusted.
  • Another method step provides the level adjustment of the channels Lt.Hi, Rt.Hi at the level controls 23, 24 by adjusting the output level in relation to channels of the lower listening plane 7, so that the impression of Listening can be perfectly matched to the respective listening situation.
  • Delay time 140 samples at 48khz, 16bit clocking
  • Delay time 10 samples at clock rate 48khz, 16bit
  • the levels are adjusted so that the encoded summation of channels RL, RR, CL, CR has the same level (dB) as that of RL. RR before the summation
  • the level adjustment is individually adjustable to the device / environment in which the method is to be used
  • FIGS. 3 to 8 show audio-video devices (AV devices), in which the inventive method is integrated.
  • the AV devices each have a signal processor, not shown in FIGS. 3 to 8, on which software is located.
  • the software contains an algorithm that is processed by the signal processor in the form of an audio processor, wherein the algorithm detects the inventive method.
  • the AV devices shown in FIGS. 3 to 7 have in common that in addition to audio input and audio output channels, they also have image input and output channels.
  • AV devices such as a television set (TV) and a flatscreen 28 shown in FIGS. 3a, 3b do not have, as before, only one or two loudspeakers for emitting monaural or stereo sound, but three loudspeakers 26, 27 for the monoklang (Fig. 3b) and four speakers 26, 27th for the stereo sound (Fig. 3a), since the upper listening plane has been added.
  • the upper listening plane is to a certain extent extracted from the lower listening plane by the encoding described in FIG. 2, which is indicated in FIGS. 3 to 8 by the dashed arrows.
  • the loudspeakers 26, 27 are conventionally installed according to individual equipment requirements and mounted so as to allow a self-tuned listening field. It is also possible, for example, to let the loudspeakers of the upper listening plane radiate upwards in order to make the listening field to become even more diffuse upwards.
  • FIG. Fig. 8a, 8b Further application examples are a mobile PC 25 (FIGS. 4a, 4b), a tablet PC 29 (FIGS. 5a, 5b) and a smartphone 31 (FIGS. 7a, 7b) both in vertical use and horizontal use, and a radio 32 (FIG. Fig. 8a, 8b).
  • a sound bar 33 is not, as shown in Fig. 6a, 6b, used only to reproduce the overall sound of an AV device, such as a television, but according to the invention also for the blasting of the extracted upper listening plane.
  • a sound bar with individual outputs according to the invention for the upper listening level the otherwise no longer active loudspeakers of the TV set with the new signals of the upper listening level while operating a sound bar and thus can operate the TV more economically.
  • a stereo signal is also generated within the scope of the invention, it can in turn be combined in the AV devices with matrix surround decoders in order to also subject the sound of the upper listening plane to a surround decoding. This makes it possible to extract an entire upper listening plane forward and backward.
  • FIG. 9 The principle according to the invention of the modularly expandable smallest unit of a signal generation, which leads to complex loudspeaker configurations, is also illustrated by FIG. 9.
  • the left output signal LHI and the right output signal RH * ZU are then added to a mono signal LHI + RHI and supplied to a first loudspeaker 35.
  • the output signals R and L in the lower listening plane 7 are routed as channels Li and Ri directly to the speakers 36, 37 of the soundbar 40.
  • the output signals R and L serve as input signals R and L in order to generate a lower hearing level 7 and an upper hearing level 6 again in the context of the method according to the invention, which in turn takes place by means of the algorithm in the signal processor 34 on which the software is located.
  • the software contains an algorithm, which is processed by the signal processor.
  • the output signals R and L in the lower listening plane 7 and in the upper listening plane 6 generates the left output signal LHI and the right output signal RHI, so again four output signals, two for the upper listening level . 6 ie LHI and RHI, and two for the lower listening plane 7, ie L and R, are generated. Thereafter, the signals LHI and RHI are added to the signals R and L in the lower listening plane 7, ie LHI is mixed with the signal L and added with the signal R. The added or mixed signals are thereby supplied to two further speakers 38, 39 of the soundbar 40 in the lower listening level.
  • the soundbar 40 thus has a total of five output channels, namely four output signals R, L, LHI + L, + R in the lower listening level 7 and an output LHI + RH in the upper listening level 6, where all output channels can also be further processed by level control, equalizer, compressor, etc.
  • the variant of a modularly expandable smallest unit shown in FIG. 9 can be supplemented by a bass box (subwoofer) 41 in a soundbar, as illustrated in FIG.
  • a bass box (subwoofer) 41 in a soundbar as illustrated in FIG. 10
  • the output signals R and L in the lower listening plane in the signal sequence before their new splitting are sent through a low-pass filter 42 and simultaneously processed as R and L signals in the signal processor 34.
  • FIG. 11 A further variant of the principle according to the invention of the modularly expandable smallest unit of a signal generation, which leads to complex loudspeaker configurations, is also illustrated in FIG. 11.
  • the signal processor 34 is used for the generation, specifically in the form of an audio processor, on which there is a software containing the algorithm.
  • the embodiment of the method according to the invention shown in FIG. 11 differs from that described in FIG.
  • the further channel LFE is led directly to a separate output and fed there as an output channel LFE another speaker, this output channel, as well as all other output channels, also by level control, equalizer, compressor, etc. can be processed.
  • the speaker configuration of an audio device corresponding to the embodiment described in FIG. 11 is illustrated in FIG. 12.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Stereophonic System (AREA)

Abstract

L'invention concerne un procédé de reproduction audio dans un système de son à plusieurs canaux comprenant deux signaux d'entrée (L et R), des signaux de sortie étant générés pour différentes hauteurs d'écoute. L'invention vise à perfectionner le procédé de telle manière que la reproduction audio bénéficie d'un plus grand champ d'application dans un système de son à plusieurs canaux. A cet effet, selon l'invention, on génère une seule hauteur d'écoute inférieure (7) et une seule hauteur d'écoute supérieure (6), et on génère au maximum six signaux de sortie dont au maximum deux signaux de sortie pour la hauteur d'écoute inférieure (7) et au maximum quatre signaux de sortie pour la hauteur d'écoute supérieure (6).
EP14851410.2A 2014-01-05 2015-01-02 Procédé de reproduction audio dans un système de son à plusieurs canaux Active EP3090575B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014100049.8A DE102014100049A1 (de) 2014-01-05 2014-01-05 Verfahren zur Audiowiedergabe in einem Mehrkanaltonsystem
PCT/EP2014/003477 WO2015101413A2 (fr) 2014-01-05 2015-01-02 Procédé de reproduction audio dans un système de son à plusieurs canaux

Publications (2)

Publication Number Publication Date
EP3090575A2 true EP3090575A2 (fr) 2016-11-09
EP3090575B1 EP3090575B1 (fr) 2018-08-22

Family

ID=52780989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14851410.2A Active EP3090575B1 (fr) 2014-01-05 2015-01-02 Procédé de reproduction audio dans un système de son à plusieurs canaux

Country Status (5)

Country Link
US (2) US11153702B2 (fr)
EP (1) EP3090575B1 (fr)
KR (1) KR102332913B1 (fr)
DE (2) DE202014010599U1 (fr)
WO (1) WO2015101413A2 (fr)

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US9986356B2 (en) * 2012-02-15 2018-05-29 Harman International Industries, Incorporated Audio surround processing system

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KR20170004952A (ko) 2017-01-11
WO2015101413A3 (fr) 2015-08-20
DE102014100049A1 (de) 2015-07-09
WO2015101413A2 (fr) 2015-07-09
US20170026768A1 (en) 2017-01-26
EP3090575B1 (fr) 2018-08-22
US11722831B2 (en) 2023-08-08
DE202014010599U1 (de) 2016-02-02
KR102332913B1 (ko) 2021-11-29
US20220070602A1 (en) 2022-03-03
US11153702B2 (en) 2021-10-19

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