EP2005421B1 - Dispositif et procédé pour la génération d'un signal d'ambiance - Google Patents

Dispositif et procédé pour la génération d'un signal d'ambiance Download PDF

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EP2005421B1
EP2005421B1 EP07703145.8A EP07703145A EP2005421B1 EP 2005421 B1 EP2005421 B1 EP 2005421B1 EP 07703145 A EP07703145 A EP 07703145A EP 2005421 B1 EP2005421 B1 EP 2005421B1
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Prior art keywords
signal
transient
channel
synthesis
examination
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English (en)
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EP2005421A1 (fr
Inventor
Jürgen HERRE
Oliver Hellmuth
Stephan Geyersberger
Andreas Walther
Christiaan Janssen
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Priority to EP11182965.1A priority Critical patent/EP2402943B1/fr
Priority to EP11182960.2A priority patent/EP2402942B1/fr
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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
    • 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
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments

Definitions

  • the present invention relates to audio signal processing, and more particularly to concepts for generating ambient signals (ambience signals) for loudspeakers in a multi-channel scenario for which no separate loudspeaker signal has been transmitted.
  • Multi-channel audio is becoming more and more popular.
  • Such playback systems generally consist of three speakers L (left), C (center) and R (right), which are typically located in front of the user, and two speakers Ls and Rs located behind the user, and typically one of them LFE channel, which is also called low-frequency effect channel or subwoofer.
  • LFE channel which is also called low-frequency effect channel or subwoofer.
  • Such a channel scenario is in Fig. 10 and in Fig. 11 indicated. While the positioning of the speakers L, C, R, Ls, Rs, with respect to the user as in the FIGS.
  • Such a multi-channel system provides several advantages over a typical stereo reproduction, which is a two-channel reproduction, such as in Fig. 9 is shown.
  • the listener has a better feeling of "immersing" in the audio scene due to the two rear speakers Ls and Rs.
  • the first option is to play the left and right channels through the left and right speakers of the multi-channel playback system.
  • a disadvantage of this solution is that you do not exploit the variety of existing speakers, so that you do not take advantage of the presence of the center speaker and the two rear speakers advantageous.
  • Another option is to convert the two channels into a multi-channel signal. This can be done during playback or through a special pre-processing, which all six speakers of the existing example Advantageously exploited 5.1 playback system and thus leads to an improved listening experience when the upmixing or the "upmix" of two channels on 5 or 6 channels is performed without errors.
  • the direct sound sources are reproduced by the three front channels so that they are perceived by the user at the same position as in the original two-channel version.
  • the original two-channel version is in Fig. 9 shown schematically, using the example of various drum instruments.
  • Fig. 10 shows a highly mixed version of the concept, in which all the original sound sources, so the drum instruments again from the three front speakers L, C and R are played, in addition to the two rear speakers special environmental signals are output.
  • the term "direct sound source” is thus used to describe a sound coming only and directly from a discrete sound source, such as a drum instrument or other instrument, or generally a particular audio object, as shown schematically in, for example, US Pat Fig. 9 represented by a drum instrument. Any additional sounds, such as due to wall reflections, etc. are not present in such a direct sound source.
  • the sound signals coming from the two rear speakers Ls, Rs in Fig. 10 are delivered, only off Ambient signals that are present in the original record or not.
  • Such ambient signals or "ambience” signals do not belong to a single sound source, but contribute to the reproduction of the room acoustics of a recording and thus lead to the so-called “immersion” sensation of the listener.
  • Fig. 11 Another alternative concept, called in-the-band concept, is in Fig. 11 shown schematically.
  • Each type of sound ie direct sound sources and ambient sounds, are all positioned around the listener.
  • the position of a sound is independent of its characteristics (direct sound sources or ambient sounds) and depends only on the specific design of the algorithm, as described in eg Fig. 11 is shown. So was in Fig. 11 the upmix algorithm determines that the two instruments 1100 and 1102 are positioned laterally relative to the listener while the two instruments 1104 and 1106 are positioned in front of the user.
  • the two rear speakers Ls, Rs now also contain portions of the two instruments 1100 and 1102 and no longer just ambient sounds, as in Fig. 10 was still the case where the same instruments were all positioned in front of the user.
  • the problem with the generation of the ambient signal is thus that on the one hand generates an ambient signal that includes information that goes beyond normal noise, but that the ambient signal unobtainable artifacts leads, so that a proper measure between audibility and information content is maintained.
  • the specialist publication " Enhancement of Audio Signals Using Transient Detection and Modification ", M. Goodwin and C. Avendano, AES, No. 6225 discloses a processing of audio signals that enables modification of audio signals by emphasizing or suppressing transients.
  • Transient detection uses a frequency domain analysis that provides a spectral flux parameter.
  • a continuous transient characterization function is used, which is used to control a non-linear frequency domain signal modification.
  • very small transients can be greatly amplified or suppressed.
  • the EP 1 385 150 A1 discloses a method and system for parametric characterization of transient audio signals wherein an approximate envelope for the transient audio signal is determined and amplitude values of samples of that envelope are determined to perform a spline approximation of the envelope.
  • the U.S. Patent No. 5,886,276 discloses a system and method for scalable audio signal encoding at various resolutions.
  • a model is used that takes into account that audio signals are composed of deterministic or sinusoidal components and transient components that represent the beginning of notes or other events in an audio signal, and stochastic components.
  • the object of the present invention is to provide a concept for generating an environmental signal in which audible artifacts are reduced.
  • the present invention is based on the recognition that the artifacts heard by listeners in ambient signals are the artifacts that cause the listener to think that the rear speaker is a direct source of sound, even though it senses that source of sound from the front.
  • Characteristics for the perception of direct sound sources are transient processes, ie signal fine structures in the time signal, which concern a (fast) change over a change threshold from a quiet state to a loud state or from a loud state to a quiet state, or one (Strong) energy increase above a threshold of change in special bands and especially in the upper bands within a certain time.
  • transient events are, for example, the insertion of an instrument or the impact of a percussion instrument, or the end of a sound that does not fade away slowly, but ends abruptly.
  • a listener perceives such transient events as characteristics of direct sound sources, which according to the invention are eliminated from an ambient signal, so that the ambient loudspeakers are supplied with an environmental signal generated according to the invention which comprises no or only strongly attenuated transients.
  • the suppression of a transient in the ambient signal does not lead to an excessive amplitude modulation.
  • variations in the amplitude that is, the loudness, even if they are not transient, are below the transient threshold, but above a certain threshold of variation, are annoying to the user and therefore when such amplitude variations are due to a transient threshold simply eliminating a transient in an ambient signal would be detected by the listener as an artifact or error.
  • a transient period is thus detected in an examination signal, in which a transient region is present in the examination signal.
  • a synthesis signal for the transient period is generated, which is designed to produce the synthesis signal such that it has a flatter time course than the examination signal in the transient region, wherein the synthesis signal generator is further configured to provide the synthesis signal to generate that it differs by less than a predetermined threshold in view of its intensity of a preceding or subsequent portion of the examination signal.
  • This generated synthesis signal is then used by a signal substitutor instead of the examination signal in the transient period to obtain the ambient signal.
  • the extraction of an ambient signal-like signal from a two-channel stereo input signal is improved, or a post-processing of an existing signal, e.g. already an extracted raw ambient signal is made.
  • the examination signal is the actual two-channel stereo signal or respectively one channel of the two-channel signal, while in the second case the examination signal is already an extracted environment signal or a presynthesized environment signal.
  • the inventive concept is particularly useful for the upmix concept, which has also been presented as a "direct ambience concept".
  • the concept according to the invention can also be advantageous for the "in-the-band" concept, since it also leads to an improved environmental signal which, on the one hand, no longer has any interfering artifacts, but on the other hand still contains enough information for a user to benefit from the ambient signal.
  • the ambient signal generation according to the invention leads to the ambient signal no relevant parts of direct sound sources has, in particular, no transients are included or transients are included only in very strongly damped form. Otherwise, the listener would perceive direct sound sources behind them, which would conflict with the experience of the user, who typically only perceives sound sources from the front.
  • the inventive concept ensures that the surround signal is a continuous, uninterrupted, diffused sound signal, since intermittent ambient sound, which is obtained, for example, if transients were simply completely eliminated, would be considered uncomfortable by the user or even errors in the high-mix process would be perceived.
  • an ambience-like signal for the rear channels is extracted from the stereo signal.
  • the difference between the original right and left channels is simply used.
  • the back channels are created in this way, they often have transient-like components of direct sound sources.
  • These transients may be tones, such as, for example, musical beginnings or parts of percussive instruments.
  • a transient perceived behind the listener while a direct sound source (to which the transient typically belongs) is positioned in front of the listener has a negative impact on the localization of the direct sound source.
  • the direct sound source thus appears either wider than the original or, even more damaging, is perceived as an independent direct sound source behind the user, both effects being very undesirable, especially for the direct ambience concept.
  • this problem is addressed by suppressing transients in the ambient-like signal and minimizing the effect of this suppression on the remaining signal, i. the continuity of the signal is preserved by allowing only limited intensity variations for the transient period.
  • the signal generated for the transient period, before being used by the signal substituter is mixed with the signal originally present in the transient period, which is achieved, for example, by overlapping processing.
  • a cross-fading may be performed to slowly fade in a cross-fade range from the signal before the transient period to the signal in the transient period, or slowly out of the transient period hide.
  • the blanking out of the transient period into the original signal when no more transient is detected is preferred for an artifact-free listening impression, since it is intended to ensure that when there is a non-artifact-related examination signal, the transition from the synthesis signal to the original one Examination signal no cracking or something similar arises.
  • a manipulation of the signal in the transient period is performed in the frequency domain by randomizing signs of spectral values or, more generally, phases of spectral values, which inevitably results in a smoothing of the temporal fine structure of this frequency domain manipulated signal.
  • Another spectral processing is to perform a prediction on the frequency of the spectral values and then the Predictive spectral values to be used as spectral values of the synthesis signal, since the prediction on the frequency leads to a smoothing of the corresponding time signal.
  • the intensity of the transient period is to limit the change of spectral values from one block to another, this limitation being global , ie for all spectral values equal or selective, ie only for certain spectral values, which have a particularly large change, can take place.
  • Fig. 1 shows a part of the device according to the invention, for generating an ambient signal 10 which is suitable for transmission via loudspeaker, for which no separate loudspeaker signal has been transmitted.
  • Such speakers are typically the rear speakers or surround speakers, as in Ls, Rs in 10 and FIG. 11 For example, shown.
  • the device shown comprises a transient detector 11 for detecting a transient period (at 20 in Fig. 2 shown) in which an examination signal has a transient region.
  • a transient detector 11 for detecting a transient period (at 20 in Fig. 2 shown) in which an examination signal has a transient region.
  • any other methods of transient detection may be used, such as those found in an MPEG4 audio encoder that switches from short to long windows depending on transient detection .
  • transient detectors are used which can detect fast and strong changes in the envelope of a time signal.
  • Exemplary magnitudes to be detected are changes in the envelope that affect changes equal to or greater than 100% of the amplitude of the envelope over a period of 1 ms.
  • the transient detector 11 is coupled to a synthesis signal generator 12, which is designed to generate a synthesis signal 13 which satisfies the two conditions, on the one hand the transient condition and, on the other hand, the continuity condition.
  • the transient condition is that the synthesis signal has a shallower time course than the examination signal in the transient region
  • the continuity condition is that the intensity of the synthesis signal in the transient region is less than a preset one of an intensity of a preceding or succeeding portion of the examination signal Threshold deviates.
  • the intensity of the signal in the transient region is at most 1.5 times or 0.66 times the intensity of a preceding non-transient portion or subsequent non-transient portion of the examination signal. This will ensure that a transient suppression will not lead to a disturbing amplitude variation or intensity variation.
  • the threshold can also be realized by a confidence interval of 80% or less, which is determined based on the historical values.
  • Intensity measures that can be used for the present invention include the energy obtained by adding the sample squares or spectral value squares of a block, or a measure of performance that can be obtained considering the temporal block length, or a measure of weighting or unweighted adding up the magnitude of spectral values in a band, this particular measure, which is also an intensity, also being referred to as high frequency content if the band in which it is added is the upper frequency band of the examination signal, or generally higher frequencies versus lower Frequencies are more heavily weighted or have a greater impact on the end result.
  • the synthesis signal generator then generates a synthesis signal that is used by a signal substituter 14 to use the synthesis signal instead of the corresponding portion of the original examination signal to finally provide the ambient signal 10.
  • the signal substitute 14 thus receives in addition to the synthesis signal via the line 13 and the examination signal via a line 15, as in Fig. 1 is indicated.
  • the transient detector 11 receives the examination signal via an input line 16 and provides via an output line 17 a transient information to the synthesis signal generator 12, so that this generates the synthesis signal using the examination signal, which is provided to him via a line 18.
  • non-overlapping block processing as in FIG Fig. 2a represented or an overlapping block processing as in Fig. 2b shown used.
  • an examination signal 21 is divided into preferably equal blocks of a specific block length.
  • the transient detector detects a transient 22 in the transient period 20.
  • the transient 22 thus lies in the transient period 20 of FIG Fig. 2a , which causes the transient detector 11 to provide an output signal via its output line 17, which tells the synthesis signal generator 12 that it now has to start with signal synthesis.
  • the block of the examination signal corresponding to the transient period 20 is now synthesized by the synthesis signal generator and then substituted by the signal substituter 14 of the original block of the examination signal in the ambient signal.
  • a processing of the block of the examination signal is performed, which takes place in the frequency domain.
  • the synthesis signal has a sample which may differ significantly from a sample which is the last sample of the preceding block in the examination signal.
  • it is used in the art Fig. 2a it is preferable to superimpose a block before a transient period into the synthesis signal in the transient period, for example by adding the first sample of the generated synthesis signal to the eg last 10 samples of the previous block weighted according to the blanking function, and For example, according to the overlay function in Fig.
  • the last sample of the previous block is still in accordance with the blanking in Fig. 3 the first and the first sample samples of the synthesized block, respectively, weighted according to the fade-in function are added in the transient period to provide a fade. Accordingly, it is possible to proceed in the rear cross-fade range, ie, when the transient period returns to the non-transient-afflicted block of the ambient signal.
  • FIG. Fig. 2b To further reduce such block boundary artifacts, as shown in FIG Fig. 2b is shown, overlapping processing is preferred.
  • the transient detector then detects at the in Fig. 2b shown embodiment block areas, which are shown with ringed numbers (1), (2), (3), (4), (5), (6).
  • a transient is detected at 22. This causes it to be compared to Fig. 2a gives a larger transient period 20 since the transient at position 22 has been detected in both block 4 and block 5. Therefore, the synthesis signal generator 12 of Fig. 1 Generate synthesis signals for both block 4 and block 5.
  • the regions A, B, C are signaled by the signal substituter 14 of FIG Fig. 1
  • the section A is generated by the addition of the second half of the non-transient-related block 3 of the examination signal with the first half of the synthesis signal generated for the block 4.
  • the second part B of the transient period 20 is provided by adding the second half of the synthesis signal generated for block 4 to the first half of the synthesis signal generated for block 5 and from the signal substituter as a corresponding portion of the environmental signal 10 substituted.
  • the third portion C of the transient period 20 is generated by adding the second half of the synthesizer signal generator generated block # 5 to the first half of the block # 6, which is no longer transient, and written into the ambient signal by the signal substituter 14.
  • this skip function can be used to provide soft block transition from a non-synthesized block to a synthesized block in block processing with non-overlapping blocks, and also to provide a smooth transition from a synthesized block back to a non-synthesized block .
  • a corresponding cross-fade function can also be used to overshadow back to the original examination signal, in particular when a synthesis signal has been generated by a specific specified number of blocks. Given the likelihood that the synthesis signal has moved relatively far from the probe due to the extrapolation, an abrupt return to the probe would, in some cases, result in audible artifacts.
  • a synthesis signal is generated, which consists of 90% of the last synthesized block and 10% of the current block of investigation. In the next block, the ratio could then be changed to 80%: 20%, until then after a certain number of blocks, the synthesis signal is completely hidden and the current non-transient-related examination signal is fully displayed again.
  • the time signal which represents a block of the examination signal, is converted into a frequency domain representation or a subband representation by a converter 40, which may comprise a transformation or an analysis filter bank.
  • the spectral representation in the form of spectral coefficients or the subband signals are then, as shown at 41, optionally replaced by information about an extrapolated spectral representation or extrapolated subband signals, if it is a block of the time signal in which a transient has been detected.
  • the spectral representation is then optionally supplied, using additional information due to extrapolation, to a smoother 42, which influences the spectral values in such a way that the temporal course of the underlying signal is smoothed.
  • the smoother 42 will affect the subband signals so that the timing of the signal underlying the subband signals is smoother than before smoothing.
  • an inverse conversion into the time domain takes place using either an inverse transformation or a synthesis filterbank to finally arrive at a timing signal 44 which is smoother than the timing signal at the input of the stage 40, however, has energy that has not been significantly affected by smoothing.
  • the smoothing has been done so that the energy of the smoothed time signal 44 does not differ from the energy of the previous time signal any more than the threshold.
  • an overall e-energy manipulation of the energy of the time signal may occur.
  • the transient is attenuated while the tonal components continue to be synthesized or past, by synthesizing the signal in the transient period by a prediction using a non-transient signal from the past.
  • the smoothing has caused the energy over the block to be more evenly distributed, thus producing a smoother timing, but without losing the block's energy Significantly changing samples of the examination signal. This is sufficient in most cases and ensures that the user hears a test signal that always satisfies the continuity condition. Only when the transient leads to a considerable increase in energy on the entire block, the smoothing alone, so the more even distribution of energy over the block, will not be sufficient and then a controlled signal limitation can be made.
  • Matrix decoders such as Dolby Pro Logic II or Logic 7, have the ability to upmix non-preprocessed 2-channel stereo files in multichannel surround files, although they have not been designed directly for this task. These Matrix decoders are often unable to suppress transient tones in the back channels, resulting in a signal that does not meet the requirements for transient-free and amplitude-continuity.
  • a transient suppression is produced without affecting the continuity of the synthesis signal or ambient signal.
  • an input signal e.g. a high-mix signal as obtained by a matrix up-mixer for the back channels, or a signal with similar characteristics and a similar range of application is analyzed to detect if a transient is present.
  • substitution signal When a transient is detected, the currently processed block is replaced with a substitution signal having a flat (non-transient) time envelope.
  • This substitution signal is either generated from previous signal portions in which no transient was present, or is generated from the currently processed block by a processing step that flattens the temporal envelope of the signal, or is generated by a combination of both methods.
  • the substitution signal generated by previous sections is obtained, for example, by extrapolating previous energy levels of the signal or by copying / repeating generated from previous signal sections without a transient range of the signal.
  • flattening of the temporal fine structure or fine time signal based on the currently processed block may be performed as described below with reference to FIGS FIGS. 5a, 5b or 5c is shown.
  • the absolute values of the spectral coefficients can be randomized within a limited range extending around the extrapolated spectral coefficients or amounts thereof, as will be described later Fig. 5c is pictured.
  • the phases or signs of the spectral coefficients of the processed block in which the transient is located may be randomized by a randomizer 50.
  • a short-time spectrum of the considered block of the examination signal is generated, and the complex spectral values obtained there are calculated in magnitude and phase, in order then to randomize the phases of the spectral values.
  • the signs can also be randomized to obtain a short-term spectrum with randomized phases / signs, which has a has a flatter time course of the corresponding time signal.
  • Fig. 5b An alternative implementation is in Fig. 5b represented by a predictor 51, which is designed to perform a prediction of the short-term spectrum over the frequency.
  • a predictor 51 is designed to perform a prediction of the short-term spectrum over the frequency.
  • Such a predictor is in J. Herre, JD Johnston: "Exploiting Both Time and Frequency Structure in a System that Uses to Analysis / Synthesis Filterbank with High Frequency Resolution", 103rd AES Convention, New York 1997 , Preprint 4519.
  • a short-term spectrum is generated which has a transient course in its assigned time signal.
  • a current spectral value of the short-term spectrum is predicted using a previous or a plurality of previous spectral values, and then the predicted spectral value could be subtracted from the actual spectral value to obtain a residual spectral value.
  • the residual spectral value of a typical prediction over frequency represents the value of interest and information-bearing information along with coefficients of a prediction filter
  • a given prediction filter is preset and the spectral values of the short-term spectrum are replaced by the spectral values predicted using this prediction filter, while the prediction error signal is no longer used.
  • the actually erroneous predictive spectral values thus obtained now have a flatter time course than the original short-term spectrum, but still have approximately the same energy, so that both the transient condition and the continuity condition, as described in connection with the synthesis signal generator 12 of FIG Fig. 1 has been shown is satisfied.
  • a preferred simple embodiment of the prediction filter exists simply in that a value of a spectral line lower in the index is used as a prediction value for a current spectral line.
  • the extrapolated signal may be blended with the original signal after a specified period of time, rather than hard switching, to avoid long-term extrapolation artifacts.
  • Fig. 6 it is preferred, as it is based on Fig. 6 is shown to detect tonal components / bands by a detector 60 and not to be influenced by the synthesis signal generator, but to combine in a mixer / combiner 61 with transient band synthesis signals to then, after a transformation into the time domain, the could take place in block 61, to obtain a time signal with a shallower time course, which still includes the tonal bands, that is, portions that were not transient, in an unchanged form.
  • Fig. 5c an implementation of the present invention, which does not require an implicit and no longer explicit transient detector.
  • a measure of the intensity of a processed signal block is, for example, the energy or radio frequency content (HFC) or other measure based on the spectral values, time samples, energy, power or other amplitude-related measure based on the signal. It is then determined in a device 54 whether an intensity increases from one block to the next above a threshold.
  • HFC radio frequency content
  • the spectral values of the processed block are limited so that their intensity does not exceed the intensity of the previous signal block by more than the determined relative or absolute threshold such that at least the overall dominance of transients is reduced.
  • This limitation takes place in a device 55 which is designed to, when a need for a limitation has been detected, ie when an implicit transient has been detected, either individually or globally limit spectral values.
  • An individual limitation would be that an increase in energy is calculated for spectral values or for bands and the spectral values or the energy bands increase only up to a maximum energy increase and values exceeding this are cut off.
  • the block Z / F represents a time / frequency domain conversion 57, wherein a conversion from the time domain into the frequency domain may also be filtering by means of an analysis filter bank, such that in this case the spectral representation consists of subband signals and not individual spectral components.
  • the transient detector as indicated at 11 in Fig. 1
  • means 89 for calculating the high-frequency content (HFC) for each block which is followed by a means for calculating the long-term HFC-72.
  • a comparator 73 detects if there is a transient or if there is a transient period in which a transient exists.
  • means 71 is configured to calculate the weighted radio frequency content (HFC) for each block of the original left signal and the original right signal. Alternatively, one HFC for each channel can be calculated separately.
  • the HFC is the weighted sum of the absolute values of all the frequency lines in a block, with increasing weighting factors from lower to higher frequencies.
  • X (f) are the spectral coefficients for certain frequencies
  • w (f) are weighting factors for certain frequencies.
  • the energy in the higher frequency components is weighted compared to the energy in the lower frequency components.
  • energy in higher spectral components is a better indication of a transient than energy in lower spectral components.
  • all spectral components can be used to calculate the HFC.
  • the calculation of the HFC can also be carried out starting from a limit which is approximately in the middle range of the spectrum, so that the low spectral coefficients play no role in the calculation of the HFC.
  • the threshold depends on the type of moving average. If the moving average is an average in which the past is weighted more heavily relative to the more recent block, ie a slower average, the threshold is closer to unity than in the case where the past is less heavily weighted into the moving average. Here the threshold would be further away from one.
  • the extrapolated values are blended in with the original values, when a fixed time interval has elapsed, such as three blocks of synthesis signals were present which then has to be returned to the original signal.
  • a fixed time interval has elapsed
  • the transient period is shorter than three blocks, it is preferred not to perform the crossfading because then it is assumed that the extrapolated signals have not yet moved so much from the original signals.
  • the fading can take place either before conversion into the time domain or, preferably, after conversion into the time domain, as at 76 in FIG Fig. 7 is shown to obtain the synthesis signal.
  • the inventive concept may be integrated into an environment signal extraction process or used as a separate post-processing step using an existing environmental signal, but still includes undesirable transients prior to processing in accordance with the invention.
  • the processing steps according to the invention can be carried out in the frequency domain per frequency line or in subbands. However, they can also be performed only partially in the frequency range typically above a certain frequency limit, or else in the time domain exclusively or in a combination of time and frequency range.
  • FIG. 12 shows a preferred embodiment of the present invention in which the ambient signal generation device is not only designed to generate ambient signals for a left surround channel output 80 and a right surround channel output 81.
  • the device according to the invention further comprises in addition a high mixer 82 for generating signals for the left channel L, the right channel R, the center channel C and preferably also for the LFE channel, as shown in FIG Fig. 8 is shown.
  • Both the combination of transient detector 12, synthesis generator 14 and signal substitute 16, ie the high mixer 82, are fed by a decoder 84.
  • the decoder 84 is configured to receive and process a bit stream 85 to provide a mono signal or a stereo signal 86 on the output side.
  • the bit stream may be an MP3 bit stream or an MP3 file, or it may be an AAC file, or may also be a representation of a parametrically encoded multi-channel signal.
  • the bitstream 85 could be a left channel, right channel, and center channel parametric representation, including one transmission channel and multiple cues for the second and third channels, this processing being known from BCC multi-channel processing.
  • the decoder 84 would be a BCC decoder which not only provides a mono or a stereo signal, but even provides a 3-channel signal, but which still does not include data on the two surround channels Ls, Rs.
  • the examination signal thus becomes a mono signal, a stereo signal or even a multi-channel signal in this case but does not include its own loudspeaker signals for the surround channels Ls, Rs.
  • the surrounding signal for the left surround channel is calculated, and from the right channel, the surround signal for the right channel is calculated.
  • the method according to the invention can be implemented in hardware or in software.
  • the implementation may be on a digital storage medium, in particular a floppy disk or CD with electronically readable control signals, which may interact with a programmable computer system such that the method is performed.
  • the invention thus also consists in a computer program product with a program code stored on a machine-readable carrier for carrying out the method according to the invention, when the computer program product runs on a computer.
  • the invention can thus be realized as a computer program with a program code for carrying out the method when the computer program runs on a computer.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Claims (15)

  1. Dispositif pour générer un signal d'ambiance qui convient pour diffusion par des haut-parleurs (Ls, Rs) pour lesquelles il n'est pas présent de signal de haut-parleur approprié, et pour générer des signaux pour un canal gauche (L), un canal droit (R) et un canal central (C) dans un scénario multicanal, aux caractéristiques suivantes:
    un détecteur de transitoires (11) destiné à détecter une période de transitoires (20) dans laquelle un signal d'examen présente une zone transitoire (22);
    un générateur de signal de synthèse (12) destiné à générer un signal de synthèse pour la période de transitoires (20), où le générateur de signal de synthèse (12) est réalisé pour générer un signal de synthèse qui présente une évolution dans le temps plus plane que le signal d'examen dans la période de transitoires (20), et dont l'intensité diffère de moins d'un seuil prédéterminé d'une intensité d'un segment précédent ou suivant du signal d'examen;
    un substituteur de signal (14) destiné à substituer le signal d'examen dans la période de transitoires par le signal de synthèse pour obtenir le signal d'ambiance; et
    un mélangeur vers le haut (82) destiné à générer des signaux pour le canal gauche (L), le canal droit (R) et le canal central (C) à partir d'un signal mono, d'un signal stéréo ou d'une représentation d'un signal multicanal codé de manière paramétrique,
    dans lequel le signal d'examen est le signal mono, le signal stéréo, le signal multicanal, un signal d'ambiance déjà extrait ou un signal d'ambiance synthétisé.
  2. Dispositif selon la revendication 1, qui est réalisé pour un traitement par bloc en cas de blocs se recouvrant ou ne se recouvrant pas.
  3. Dispositif selon la revendication 2, dans lequel le détecteur de transitoires (11) est réalisé pour calculer des valeurs d'intensité pour des blocs successifs, et pour détecter une période de transitoires (20) lorsqu'une valeur d'intensité d'un bloc diffère de plus un seuil de transitoires d'une valeur d'intensité précédente ou suivante.
  4. Dispositif selon la revendication 3, dans lequel le générateur de signal de synthèse (12) est réalisé pour limiter, pour un bloc dans la période de transitoires (20), une pluralité de valeurs spectrales représentant un spectre de courte durée du bloc, de sorte que leur intensité diffère de moins du seuil de transitoires prédéterminé de l'intensité d'un bloc précédent ou suivant.
  5. Dispositif selon la revendication 3 ou 4, dans lequel le générateur de signal de synthèse (12) est réalisé pour randomiser, en ce qui concerne leur phase ou leur signe, les valeurs spectrales complexes qui représentent un spectre de courte durée du bloc qui comporte la période de transitoires (20).
  6. Dispositif selon l'une des revendications précédentes,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour calculer le signal de synthèse à partir de segments du signal d'examen avant ou après la période de transitoires à partir du signal d'examen dans la période de transitoires, après aplanissement de l'évolution dans le temps de ce dernier, ou à partir d'une combinaison des segments de signal du signal d'examen et du signal d'examen après un aplanissement.
  7. Dispositif selon la revendication 6,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour copier des segments du signal d'examen avant ou après la période de transitoires.
  8. Dispositif selon la revendication 6,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour randomiser, dans une zone prédéterminée, des valeurs spectrales extrapolées qui sont dérivées du signal d'examen en-dehors de la période de transitoires.
  9. Dispositif selon l'une des revendications précédentes,
    dans lequel le substituteur de signal (14) est réalisé pour entrer en fondu enchaîné, selon une fonction de fondu enchaîné, d'un segment avant la période de transitoires dans la période de transitoires ou pour entrer en fondu enchaîné, selon une fonction de fondu enchaîné, de la période de transitoires dans un segment après la période de transitoires.
  10. Dispositif selon l'une des revendications précédentes,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour calculer un spectre de courte durée du signal de synthèse avec des valeurs spectrales (40, 41, 42),
    pour convertir le spectre de courte durée en une représentation temporelle (43) qui représente le signal de synthèse (44).
  11. Dispositif selon l'une des revendications précédentes,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour générer le signal de synthèse de sorte que le seuil prédéterminé soit inférieur ou égal à un facteur de 2.
  12. Dispositif selon l'une des revendications précédentes,
    dans lequel le générateur de signal de synthèse (12) est réalisé pour utiliser, comme seuil prédéterminé, un seuil préétabli sélectif par bande ou un seuil pour tout le spectre.
  13. Dispositif selon l'une des revendications précédentes, présentant par ailleurs la caractéristique suivante:
    dans lequel le générateur de signal de synthèse (12) est réalisé pour fournir le même signal d'ambiance pour un canal gauche arrière ou un canal droit arrière, ou pour échelonner le signal d'examen des sorte qu'il soit déterminé, pour le canal gauche arrière et le canal droit arrière, des versions échelonnées différemment du signal d'ambiance, ou pour calculer, pour deux canaux d'ambiance, des signaux d'ambiance propres.
  14. Procédé pour générer un signal d'ambiance qui convient pour diffusion par des haut-parleurs (Ls, Rs) pour lesquels il n'est pas présent de signal de haut-parleur approprié, et pour générer des signaux pour un canal gauche (L), un canal droit (R) et un canal central (C) dans un scénario multicanal, aux étapes suivantes consistant à:
    détecter (11) une période de transitoires (20) dans laquelle un signal d'examen présente une zone transitoire (22);
    générer (12) un signal de synthèse pour la période de transitoires (20), pour générer un signal de synthèse qui présente une évolution dans le temps plus plane que le signal d'examen dans la période de transitoires (20), et dont l'intensité diffère de moins d'un seuil prédéterminé d'une intensité d'un segment précédent ou suivant du signal d'examen;
    substituer (14) le signal d'examen dans la période de transitoires (20) par le signal de synthèse, pour obtenir le signal d'ambiance; et
    générer, par un mélangeur vers le haut (82), des signaux pour le canal gauche (L), le canal droit (R) et le canal central (C) à partir d'un signal mono, d'un signal stéréo ou d'une représentation d'un signal multicanal codé de manière paramétrique,
    dans lequel le signal d'examen est le signal mono, le signal stéréo, le signal multicanal, un signal d'ambiance déjà extrait ou un signal d'ambiance synthétisé.
  15. Programme d'ordinateur pour réaliser un procédé selon la revendication 14 lorsque le procédé est exécuté sur un ordinateur.
EP07703145.8A 2006-04-12 2007-01-30 Dispositif et procédé pour la génération d'un signal d'ambiance Active EP2005421B1 (fr)

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EP11182960.2A EP2402942B1 (fr) 2006-04-12 2007-01-30 Dispositif et procédé de production d'un signal d'environnement

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US74471806P 2006-04-12 2006-04-12
DE102006017280A DE102006017280A1 (de) 2006-04-12 2006-04-12 Vorrichtung und Verfahren zum Erzeugen eines Umgebungssignals
PCT/EP2007/000791 WO2007118533A1 (fr) 2006-04-12 2007-01-30 Dispositif et procédé pour la génération d'un signal d'ambiance

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EP11182960.2 Division-Into 2011-09-27
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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007069150A1 (fr) * 2005-12-13 2007-06-21 Nxp B.V. Dispositif et méthode de traitement d’un flux de données audio
GB2437337A (en) * 2006-04-21 2007-10-24 Snell & Wilcox Ltd Measuring block artefacts in video data using an auto-correlation function
US8204237B2 (en) * 2006-05-17 2012-06-19 Creative Technology Ltd Adaptive primary-ambient decomposition of audio signals
US8379868B2 (en) * 2006-05-17 2013-02-19 Creative Technology Ltd Spatial audio coding based on universal spatial cues
JP2007316254A (ja) * 2006-05-24 2007-12-06 Sony Corp オーディオ信号補間方法及びオーディオ信号補間装置
CA2697920C (fr) * 2007-08-27 2018-01-02 Telefonaktiebolaget L M Ericsson (Publ) Detecteur de transitoires et procede pour prendre en charge le codage d'un signal audio
DE102007048973B4 (de) 2007-10-12 2010-11-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Erzeugen eines Multikanalsignals mit einer Sprachsignalverarbeitung
EP2296145B1 (fr) * 2008-03-10 2019-05-22 Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. Dispositif et procédé pour manipuler un signal audio comportant un événement transitoire
EP2359608B1 (fr) * 2008-12-11 2021-05-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil pour générer un signal audio multicanal
EP2214165A3 (fr) 2009-01-30 2010-09-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil, procédé et programme informatique pour manipuler un signal audio comportant un événement transitoire
CN102157151B (zh) 2010-02-11 2012-10-03 华为技术有限公司 一种多声道信号编码方法、解码方法、装置和系统
JP5307770B2 (ja) * 2010-07-09 2013-10-02 シャープ株式会社 音声信号処理装置、方法、プログラム、及び記録媒体
US8489391B2 (en) * 2010-08-05 2013-07-16 Stmicroelectronics Asia Pacific Pte., Ltd. Scalable hybrid auto coder for transient detection in advanced audio coding with spectral band replication
BR112015017222B1 (pt) * 2013-02-05 2021-04-06 Telefonaktiebolaget Lm Ericsson (Publ) Método e decodificador configurado para ocultar um quadro de áudio perdido de um sinal de áudio recebido, receptor, e, meio legível por computador
DE102014214143B4 (de) 2014-03-14 2015-12-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Verarbeiten eines Signals im Frequenzbereich
US9820073B1 (en) 2017-05-10 2017-11-14 Tls Corp. Extracting a common signal from multiple audio signals
CN112731519B (zh) * 2019-10-28 2024-06-25 中国石油天然气集团有限公司 确定颤动时间区间的方法和装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076969A (en) * 1975-04-07 1978-02-28 Singer & Singer Impulse noise reduction system
US20050114128A1 (en) * 2003-02-21 2005-05-26 Harman Becker Automotive Systems-Wavemakers, Inc. System for suppressing rain noise

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819269A (en) * 1987-07-21 1989-04-04 Hughes Aircraft Company Extended imaging split mode loudspeaker system
JPH0715800A (ja) * 1993-06-21 1995-01-17 Toshiba Corp サラウンド回路
US5610986A (en) * 1994-03-07 1997-03-11 Miles; Michael T. Linear-matrix audio-imaging system and image analyzer
US5886276A (en) 1997-01-16 1999-03-23 The Board Of Trustees Of The Leland Stanford Junior University System and method for multiresolution scalable audio signal encoding
US7231060B2 (en) * 1997-08-26 2007-06-12 Color Kinetics Incorporated Systems and methods of generating control signals
US6928169B1 (en) * 1998-12-24 2005-08-09 Bose Corporation Audio signal processing
KR100809310B1 (ko) * 2000-07-19 2008-03-04 코닌클리케 필립스 일렉트로닉스 엔.브이. 스테레오 서라운드 및/또는 오디오 센터 신호를 구동하기 위한 다중-채널 스테레오 컨버터
WO2004008806A1 (fr) * 2002-07-16 2004-01-22 Koninklijke Philips Electronics N.V. Codage audio
SG108862A1 (en) 2002-07-24 2005-02-28 St Microelectronics Asia Method and system for parametric characterization of transient audio signals
US7353169B1 (en) * 2003-06-24 2008-04-01 Creative Technology Ltd. Transient detection and modification in audio signals
US20070033014A1 (en) * 2003-09-09 2007-02-08 Koninklijke Philips Electronics N.V. Encoding of transient audio signal components
US7970144B1 (en) * 2003-12-17 2011-06-28 Creative Technology Ltd Extracting and modifying a panned source for enhancement and upmix of audio signals
SE0400997D0 (sv) * 2004-04-16 2004-04-16 Cooding Technologies Sweden Ab Efficient coding of multi-channel audio
US7876909B2 (en) * 2004-07-13 2011-01-25 Waves Audio Ltd. Efficient filter for artificial ambience

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076969A (en) * 1975-04-07 1978-02-28 Singer & Singer Impulse noise reduction system
US20050114128A1 (en) * 2003-02-21 2005-05-26 Harman Becker Automotive Systems-Wavemakers, Inc. System for suppressing rain noise

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DEUTSCH, W.A., NOLL, A.: "Restoration of historical recordings by means of Digital Signal Processing", PREPRINTS OF THE 75TH CONVENTION OF THE AES, 30 March 1984 (1984-03-30), pages 1 - 8 *

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CA2643862C (fr) 2014-12-16
JP4664431B2 (ja) 2011-04-06
EP2402943A3 (fr) 2012-06-20
EP2402942A3 (fr) 2012-05-23
EP2402943A2 (fr) 2012-01-04
EP2402943B1 (fr) 2016-08-24
EP2005421A1 (fr) 2008-12-24
US9326085B2 (en) 2016-04-26
US20070242833A1 (en) 2007-10-18
DE102006017280A1 (de) 2007-10-18
ES2604133T3 (es) 2017-03-03
PL2402943T3 (pl) 2017-02-28
CN101421779B (zh) 2013-04-17
HK1124951A1 (en) 2009-07-24
US8577482B2 (en) 2013-11-05
CN101421779A (zh) 2009-04-29
EP2402942B1 (fr) 2016-06-01
CA2643862A1 (fr) 2007-10-25
JP2009533910A (ja) 2009-09-17
EP2402942A2 (fr) 2012-01-04
ZA200809604B (en) 2010-03-31
US20120195434A1 (en) 2012-08-02

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