Apparatus and method for comfort noise generation mode selection.

APPARATUS AND METHOD OF / ELECTION LE 1κ; 1 · ϋ GEKERl · ': IÓM DE W'i3Q

CCNIT

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the coding, processing and decoding of audio signals, and in particular to an apparatus and method for selecting a mode of noise generation, such as: ... Idio go. : V ·: ·; d :: np .; Or, didR-WE, G, 7lB) generally include a discontinuous transmission scheme. (DTX) and a comfortable generator set (CNG). The cs: u: ir: r i: n. DTX / CNG is used to reduce the transmission speed by simulating background noise during signal periods *

The CMC can, for example, be formulated in diuretic forms.

The most commonly used method, used in codes such as AMR-CB (ITU-r G.722,2 Annex A) and G.7IS (ITÜ-TG * 7lB Seo, 6.12 and 7.12), is based on a model of Excitation + prediction line.ii .. (LP). First a random excitation signal is generated, then a gain is gained, and finally a reverse LP filter is produced, producing the CNG domain signal: time . The two main parameters transmitted are excitation energy, and the LP coefficients (generally using an LSF or ISF representation). This method is called LF-CNG-

Another method, recently proposed and described for example in patent application WQ2014 / 0962 7, "Generation of comfortable noise with high resolution temporal spectrum in the discontinuous trision of Les Les Ardètes" is based on the dam in a domain Frequency (FD) of background noise. Random noise is generated in a frequency domain (eg, FFT, MDCT, QMF), then it is modeled-using an FE representation of the background noise, and finally converted from the frequency domain to the time domain, producing the signal CBJG Of time domain. The two transmitted main parameters are a global gain and a set of band noise levels. This method is referred to in the present FD-CNG, the present invention is intended to provide concepts for the generation of comfortable noise.

Reagent ion 13, by a method according to the

Claim 14, by a method of agreement-to the

Claim 15, and by a computer program according to Claim 1S,

An apparatus for encoding information of fire is provided. The apparatus for encoding information. Comprises a selector for selecting a comfortable noise generation mode of two or more comfortable noise generation modes according to a background noise characteristic of an audio input signal and a coding unit for encoding information of Audio, while the audio information comprises information so as to indicate the mode of comfortable noise generation i'- :; 1 operative, Other things, the realizations are based on the discovery. FD-CNG provides a better quality for the bottom-up of the high-distortion side-by-side, for example: • or :: an automobile, while LF-CNG provides a better -v, ΙΙν, ϊΙ :: 1: -re;: v: In background noise more ert> · ::: ó s. ............... Office noise; Η, ϊ::: ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ ΐ. To the realizations, to π both: rr: 'oq: r · ::; r': and of them is only 1 = background noise,

The embodiments provide a reader which decides which CtdG mode should be used, eg LE-CNG or FU-CNG,

According to a realization, the selector may, for example, be configured to determine a distortion of a background noise of the audio input signal as the background noise characteristic. * The selector may, for example, be configured To select said comfortable noise generation mode of two or more comfortable noise generation modes according to the determined distortion,

In one embodiment, the apparatus may, for example, be is nd · ::; The noise estimator for estimating a baseline bandwidth estimation for each of a plurality of bandwidths. The selector may, for example, be set to det The distortion according to the noise of the bandwidth of the frequency bands,

According to. You can, for example, ·· :: t <ui: configured \: ·:::: to: stretch: :: an estimation, per band -: 1.: 11, ru ii: - de fancl: - a ai, 1 n: la la la en »:. : -: -a .a of the background noise: ·: · cad-i a d, e la 1: a; c -a i. X: a. Of tarai-as -: ie frequency.

In one, a revaluation, if a negative estimator. : An example being configured to determine a low frequency background noise value indicating the energy of a first background noise for a first group of the plurality of frequency bands according to the background noise band estimate of Each frequency band of the first group of the plurality of frequency bands.

On the other hand, in this embodiment, the noise-averaging device may, for example, be configured to determine a high frequency background noise value indicating the energy of a second background noise for a second plurality of the plurality of ' Of frequency bands according to the. Estimation by band, of the noise of fondc of each frequency band, of the second group of piucatiacie frequency bands. At least one band of the first or second band may have, for example, a lower central frequency: a central frequency, The frequency of the second group in a real frequency of the first frequency band of the first group, Group may, for example, have a central frequency less than a central frequency of each frequency band of the second group,

In addition, the selector may be, for example, Plum for, <:; ur gold i nt. R the distortion or? -nur: - noise ratio of ϊ ϊ ϊ ϊ ϊ: A. And from "cccr-ic to the noise value of fonction: eci

Of love! An area; In the preferred embodiment of the present invention there is provided a process for the preparation of a compound of formula (I): Ra · i :; Err: yes yes: erminar the value of the background noise:

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Where I indicates a freorian plane; The frequency bands are the same as the first group of frequency bands. : 1 of frequency bands, in "I", indicates the second of the plurality of frequency bands, and as long as it indicates the energy level of the background noise of the unit i -fcb.

In a tonal illation, the noise estimator may, for example, be configured to determine the high frequency background noise value H according to

<img img-format="tif" img-content="drawing" file="MX2017001237AD00072.tif" id="idf0002" />

Where i denotes a bit of frequency i-ti of the second group of frequency bands, while I indicates a third of the plurality of frequency bands, while I4 denotes a fourth of the plurality of frequency bands, and , H [i] indicates the energy estimate of the. Background noise energy of the i-th frequency band.

According to. An embodiment, if the selector can for example be configured to further determine the resolution T according to the noise value of the frequency band of the frequency L and according to the value of the high- Frequency s according to the formula

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Or according to the formula

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Or according to the formula

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Or according to the formula

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In one embodiment of the invention there is provided an apparatus of the present invention; A. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - : Ηρ 1 or, -: - :: 1: r is configured to determine a value i :: - c: I ::::: - :::: 1 :: - term acts 1 and of aci d &lt;a. A value of the previous long-term torsion. In addition, the selector may, for example, be configured to: select one of two or more comfortable noise generating modes according to the current long-term distortion value "

According to one embodiment, the selector can, for e; It, be configured to determine the distortion value, current long-term T&gt; - according to the formula:

<img img-format="tif" img-content="drawing" file="MX2017001237AD00091.tif" id="idf0007" />

Doi 'Γ · τ ..' - the current short-position distortion, while j? IT is said previous long-term list value, and while a is a number r # al with 0 &lt;a &lt;1.

In one embodiment, the first one; 1:01 ντο o ~ Ti :; Modes of generating comfortable noise: r by e, jvnn: 1 o -., 0 - :, 1 - Comfortable domain of frequent domain. 1, 2, 1, 2, 3, 4, 5, 6, 6, 7, 8, 10, For example, to be a mode of: 1: -n :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: Predictive domain, linear. In addition, the s tor may, for example, be c :: -: 1: purged · τ :::: - τ; , :: - :: 1 action: L node gi-τη-τ r ":, cióix-noise c :: -: t nble d :: minio de i r-: science, ai a mode of generation previously deleted , Previously selected by the selector, is the comfortable noise generation mode of linear prediction domain and if the current long-term distortion value is greater than a first threshold value.

For the other part, there is provided an apparatus for generating an audio output signal based on the received coded audio information. The apparatus comprises a unit or encoder for encoding the encoded information to obtain Coded mode information with the encoded audio information, while the mode information indicates a mode of noise generation as indicated by two or more of the following generation modes: Id ·: with i ·: rtable. On the other hand, the apparatus comprises in a signal processor to generate the audio output signal by means of the ginning, according to the manner of generating comfortable noise indicated,

According to one embodiment, the first of the two or more modes of generating comfortable noise may, for example, be a comfortable frequency domain noise generating mode. The signal processor may, for example, be configured, if the preferred noise generating mode is the comfortable noise generation mode: frequency, to generate comfortable noise. F rpency and driving one. Conversí :: · :; D ·:: fu: -uu: η: i · λ -u · ::; time of!. Comfortable noise gensradí - :: n :: i. Üoo'uuu: from i ::::::: c: u- :: i _: ¿. Example, in u.na. The signal processor can, for j · ϊ ·· τ: ν. · I be configured vi., :: i: noise generation mode *:; Nfor bable indi cide is the ease of noise generation,

In one embodiment, a second of the two or more generation modes of comfortable noise may, for example, aerate a comfortable prediction domain noise generating mode. The signal processor may, for example, be configured, if the comfortable noise generation mode indicated is the comfortable noise generation mode of linear prediction domain, to generate comfortable noise using a linear prediction filter "By Example, in a specific embodiment, the signal processor may, for example, be configured, if the generation mode. Of comfortable noise indicated is the comfortable noise generation mode of prediction domain, linear, to generate comfortable noise generating a random excitation signal, scaling the excitation signal, alen. To listen to 3 1 1 t t t t t t t t escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal escal. In this case,

Ldt: a system. The / i: / -: //: 1 / yields an aparate ra '/; : / 1: 1: / 1 /: L: u: - /// icion. :::::::::::::::::::. And an apparatus for generating /: /: /: /: /: /: /: / . :: audio η 1: to encoded audio information. And in accordance with one of the following: FIG. The selector of the audio coding apparatus is configured to select a comfortable noise generation mode of two or more nodes, the comfortable noise level according to a preferred embodiment of the invention. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Of the apparatus for encoding the audio information (and is set up for the audio information, which: Ir yields information from m · ::; I: one indicates the comfortable noise generation mode selected as an indicated comfortable noise generation mode, for obtaining audio-coded information. On the other hand, the decoding unit of the apparatus for generating an audio output signal is configured to receive the encoded audio information, and further is for decoding the encoded audio information to obtain the coded mode information with the audio information Coded. The pr v't:: .-- ¾. The signal being generated by an apparatus for generating a signal from the transmitter to the receiver, ·: Look at the audio output signal ·: ·::::::::::::::::::::: 1 ndi rui ·: comfortable noise. One indicates the comfortable noise generation mode selected as an indicated comfortable noise generation mode for obtaining audio-coded information. On the other hand, the decoding unit of the apparatus for generating an audio output signal is configured to receive the encoded audio information, and further is for decoding the encoded audio information to obtain the coded mode information with the audio information Coded. The pr v't:: .-- ¾. The signal being generated by an apparatus for generating a signal from the transmitter to the receiver, ·: Look at the audio output signal ·: ·::::::::::::::::::::: 1 ndi rui ·: comfortable noise. One indicates the comfortable noise generation mode selected as an indicated comfortable noise generation mode for obtaining audio-coded information. On the other hand, the decoding unit of the apparatus for generating an audio output signal is configured to receive the encoded audio information, and further is for decoding the encoded audio information to obtain the coded mode information with the audio information Coded. The pr v't:: .-- ¾. The signal being generated by an apparatus for generating a signal from the transmitter to the receiver, ·: Look at the audio output signal ·: ·::::::::::::::::::::: 1 ndi rui ·: comfortable noise.

On the other hand, a method for encoding audio or audio is also included. The method "o-¡: in:

Select a comfortable generation node from: - - - - - - - - -

According to a background noise of a; Η &lt;=. Y::

Encode the audio information, in. Both the audio information and the information are available. -i ru: ::: · gue indicates, the gen * mode; Ration of roid; Or · selected:

In addition, a salt signal is provided. Di: audio based on encoded audio information LE 1 Ir. The method comprises:

Coded audio information for obtaining coded mode information with the encoded audio information, while the information, so indicates an i · n ': mode. Comfortable noise indicated by two or more modes of generating comfortable noise. Y: Generate,; or na 1 audio output generating, according to i: mode; · I ·: V; Of comfortable noise indicated, noise ·: ·: ·:. I Otherwise, there will be a computer program to complete: 1 t: i :: 1, 1: &lt;::.: ¾ deacri pi: cae ae Run sobi ·: · :. The chorus of the chorus, and the chorus of the chorus. :. I.

Aspects of the realizations, the selector propi; · :: b::&gt; puecl:, p:; x 'e ·:, x: u;: · ir se fu :; Sx. The distortion, of background noise. For example, if the background noise distortion is high then FD-CHG- is selected, otherwise LF-CNG is selected,

An attenuated version of background noise distortion and a hysteresis may, for example, be used to avoid frequent switching from one mode to another.

Background noise distortion can, for example, be estimated using the ratio of background noise energy at low frequencies and background noise energy at high frequencies.

The energy of the background noise can, for example, be in. The frequency domain using a noise estimator. A contiϊ · Τ; .vé de ;; : 11L · i. Run the embodiments of the present invention with roy; With reference to the

Figures i;

Figure 1 for encoding information sui or according to an embodiment,

Lu F i. 2 illustrates a time to encode information from another region,

For example, you can select an analogue or analogue-to-analogue-to-analogue-to- Acue Liza-pun,

The FL :: a, 4 ii ur, t; In an apparatus for generating an audio signal from the audio output of the audio information of the audio signal, 13, according to one embodiment, and FIG. 5 is an internal view according to a particular embodiment. a;. FIG. 1 shows an apparatus for transmitting audio information according to an embodiment. FIG.

The audio cassette comprises a signal; the audio signal comprises a plurality of audio signals; Anger A method of generating a comfortable noise generating mode according to a background noise characteristic of an audio input signal is provided.

On the other hand, the apparatus comprises a coding unit 120 for encoding the audio information, while the audio information comprises information so as to indicate the mode of comfortable noise generation if: *. For example, the first of the two or more modes of comfortable noise may, for example, be a comfortable frequency domain noise mode, for example a second of the two or more generation modes , For example, r in the predictive domain comfortable noise i-mode: -i? If, on the decoder, it receives the coded audio stream, the audio information being in the mode information, is read with the audio information. Encoded audio, in: l: if comfortable noise-generating mode i:: i: i; :

However, if, for example, the mode information, encoded with the signal, indicates that the mode of generation of the cloned signal is the comfortable noise generating mode of the receiver: Of the prediction, linear, i -: .- 1-0 - :: -, the p 1-0 - ::. Can generate a comfort signal by generating an excitation signal at the same time as the signal is being scaled. The excitation signal is obtained by extracting an ex-signal and synthesizing the excitation signal. Being a LF reverse filter "

Within i. A r. Coded audio, not just the first one. : -::.::.:: The comfortable noise generation mode, ri: p.;. :: L: additional training can be coded. It is also possible to code for factors such as: .no no; R'i: iae: i Ϊ :: :: :: :: :: i:.:; ode. Of fre · ree "-iu, example, an i. :: :: :: :: :: :: ::? The band, of a band. 0, for example, one or both of the LSF coefficients: ·························. Of the coded audio information in the selected noise comfortable generating mode and the additional information, in the following way: Encoded with the encoded audio information may then, for example, be transmitted to the de-encoder, eg,

The information on the selected comfortable noise generation mode can be explicitly encoded or expanded.

When the selected comfortable noise generation mode is explicitly encoded, then one or more bits may, for example, be used to indicate which one of the two or more modes of comfortable noise generation is the selected comfortable noise generation mode. In such a real state, the one or more bits mentioned below are coded mode information.

In other embodiments, however, the noise scaling mode is selectively encoded within the audio information. For example, in the above example, the gain factors, frequency band specificities and the coefficient of 1.1 (or LSF or PSI, with a different format Or may, for example, have a different bit length. If, for example, the specific gain factors per frequency band are encoded within the audio information, this may , For example, to indicate that the comfortable noise generation mode gives frequency domain is the selected comfortable noise generation mode. If, however, the LP or (LSF or ISF) coefficients are encoded within the information of Audio, this can, For example, indicate that the comfortable linear noise prediction domain noise generation mode is the selected comfortable noise generation mode. When either implicit coding is used, it is the gain factors that are used for the frequency of the frequency or the coefficient LP 0 LSF or ISF. Ρf or 1 to go; Fnodulation of node zodifi.ea.da dcnt: v: · -: u ·. I: :: 0 :: 0:]: encoded audio, while this information -: V:: n- :: i: indicates the mode of generation of. I freaked out. Ρf or 1 to go; Fnodulation of node zodifi.ea.da dcnt: v: · -: u ·. I: :: 0 :: 0:]: encoded audio, while this information -: V:: n- :: i: indicates the mode of generation of. I freaked out. Ρf or 1 to go; Fnodulation of node zodifi.ea.da dcnt: v: · -: u ·. I: :: 0 :: 0:]: encoded audio, while this information -: V:: n- :: i: indicates the mode of generation of. I freaked out.

By way of example, the selector 11 is set to be set to determine L: l: The signal of the acoustic signal as the signal is transmitted to the receiver. The selector 110 may be configured to select such a comfortable noise generation mode of two or more, Modes of noise generation · comfortable - according to the determined distortion ro 1: vi: noise, - a background noise value can be used. : And a high frequency background noise value, and the distortion of the background noise may, for example, be the same as the value of Low noise background noise and high frequency noise. - - - - - - - - - - - - - - -. Figure 2 illustrates a diagram for: - - - - - 1 i. Information or in accordance with an additional embodiment.

The apparatus of Figure 2 further comprises a noise estimator 1 5 for estimating a background noise band estimate for each of a plurality of frequency bands. The selector 11D may, for example, be configured to determine the Distortion according to the estimated background noise of the plurality of frequency bands *

According to one embodiment, the IBS noise estimator may, for example, be configured to estimate an estimate, per background noise band by estimating the background noise energy of each of the plurality of frequency bands.

In one embodiment, the noise estimator 105 may, for example, be configured to determine a background noise value of]: - s. There is a quantity that indicates the energy of a. Rr for a first group of the plurality of frequency bands according to the background noise band estimate of each frequency band of the first group of the plurality of frequency bands.

On the other hand, the noise estimator 1D5 may, for example, be configured to determine a high frequency background noise value indicating the energy of a background noise signal for a second group of the plurality of Frequency bands according to the estimation of the frequency band of the second group of the plurality of frequency bands. At least one frequency band of the first group may, for example, have a central frequency less than a central frequency of at least one frequency band of the second group. In a specific embodiment, each frequency batch of the first group may, for example, have a center frequency less than a center frequency of each frequency band of the second group.

In addition, the selector 110 may, for example, be configured to determine the distortion according to the low frequency background noise value and according to the high frequency background noise value.

According to one embodiment, the noise estimator 105 per ·; Be configured to determine the low frequency background noise value L according to

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While i indicates a frequency bundle i-t del of the first group of frequency bands, while 11 indicates the first of the plurality of frequency bands, and the second one of the pin: 1: ac- Frequency bands, and cu rv. : · LiF:] indicates the energy value of the energy of the rui .1; · i ·. ·· f. Nio; Frequency beat, i-th

Similarly, in one embodiment, the. Of noise 1Q5 can, for example,. -and · :: tai configured to determine: Ία high-level background H agrees to

<img img-format="tif" img-content="drawing" file="MX2017001237AD00231.tif" id="idf0009" />

Where i: th frequency of the second group of bands r, of, in santo indicates a third of the plural i dr. : I 1 ·: - Υ-ζϊΔκ ?, d ·: · έ i ecuencia, in truc: ··· J. &lt;indicates a fourth, of '' • eueuenci.B, and while J # [i] indicates " Estimation of energy - from the background noise of the orcYU band: i- "ή.

In one embodiment, the selector ligature may be set to be determined to determine the tonal distonion in accordance with the low background noise value. A high frequency background noise value j, according to the formula

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Or according to the formula

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Or according to the formula

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Or according to the formula

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For example, when L and jfi are represented in a logarithmic domain, one of the subtraction formulas iTT = L - Ή or T = Ή - i) can be used

In one embodiment, the selector 110 may, for example, be configured to determine the distortion as a current short-term distortion value. On the other hand, the selector 110 may, for example, be configured - to determine a distortion value of Current term based on the current short-term distortion value and from: a. A predetermined long-term distortion value, the sensor 110 may, for example, be configured as one of two or more generation modes of: Comfortable according to value: current long-term stersion *

According to one embodiment, the selector 1 mi by, for example, is conf. . For dr :: ni mar my distortion value di arqo pl&gt; actt T .., T rdc formula:

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Insofar as T is the current short-term distortion value, while Γριι · said long-term distortion value predicted, and while cr is a real number with 0 &lt;a &lt;1 *

In one embodiment, the first of the two or more modes of generating comfortable noise will, for example, be a comfortable noise generation mode of FO_CMG. On the other hand, a second of two or more modes of generating a comfortable stream may, for example, be a comfortable domain-generating mode of pre-selection: Linear LP_CSG, Selector llD may, for example, Example, set to select the degenerate mode. If a previously selected radio mode is selected, the radio frequency must be set to the desired frequency in order to determine the desired frequency. Selector 110, is the noise decomposition mode -rar, r rt ti: -le- prediction domain li ne! LI- and the vul ·:: ·: Of the current term and a first threshold value tñr-i ​​* On the other, part, eg. For example, be configured to show the mode of generation, of a comfortable linear LP_CNG, if the mode veneration is only; The selected mode is the mode of the comfortable noise generator: t: -:::::::: n: '' '' '' '' '' '' '' '' '' '' '' '' '' ' I .vivn dv, current long term is smaller cjiie x, ··. ·. ... Selected by the controller 11D, is the comfortable noise generator mode: -:::::: n: '' '' '' '' '' '' '' '' '' '' '' '' '' ' I .vivn dv, current long term is smaller cjiie x, ··. ·. ... Selected by the controller 11D, is the comfortable noise generator mode: -:::::: n: '' '' '' '' '' '' '' '' '' '' '' '' '' ' I .vivn dv, current long term is smaller cjiie x, ··. ·. ...

In some I va ri · · i ir .; Threshold value is equal to v.vvv.:/; You go I: · ν threshold. In some others: realiEaciot: -v ", vi :::; (1), (2), (3) and (4). The threshold value is the value of the threshold. The audio coding information is received in accordance with one embodiment of the present invention,

The apparatus comprises a decoding unit 210 for decoating the encoded audio information to obtain encoded mode information with the encoded audio information. The mode information indicates a convenient, comfortable noise generating mode of two or more modes of generating comfortable noise.

On the other hand, the apparatus comprises a signal processor 220 for generating the audio output signal by the generation, according to the indicated comfortable noise generating mode, of comfortable noise.

According to one embodiment, the first of the two or more modes of generating comfortable noise may, for example, be a comfortable frequency domain noise generating mode. The signal processor 220 may, for example, be configured, if the comfortable noise generation mode indicated is the noise-comfortable mode of frequency domain, to generate noise-comfortable in a frequency domain and driving a Frequency conversion of comfortable noise generated in the frequency domain * For example, in one embodiment, the signal processor may, for example, be configured, if the noise-generating mode confortat-L- :: The noise-generating mode of the frequency domain, to generate the noise r- :: n i '::; C. In the spatial domain of the spatial domain, in the domain of spatial frequency, and in the domain of spatial frequency. : - modeling, and converting domain modeling noise:: * * frequency to the time domain.

For example, t: - :; Eimp.l · :: a rae lo concepts described / 09527

For example, the following can be applied to the individual: e::::::::::: N the FFT domain v:: - - -: 1 - ::::::: 1: -: - ΙΙΙ-ΙΓ :: ando one or more alert sequences ΓΓΊΓΓΊ: Fast F or laugh, QMF =

Filt :: - K. ·: [: ·: · - ·: ·: -: The modeling of-1. Random noise can., By, driven by computing individually the amplitude of the random sequences in. Each band in such a way that the generated comfortable noise spectrum resembles the current background noise present in, for example, a bit stream (I.e. :. , A disc, an audio track: an audio wave. Then, for example, the amplitude may, for example, be applied to the random sequence, for example, by multiplying the random sequence by the amplitude. Computed in each frequency band. It is then possible to convert the modeled noise of the frequency domain to the time domain,

In one embodiment, a second of the two or more cutoff modes:; A. Of comfortable noise may, for example, be a comfortable prediction linear noise prediction domain. The signal generator 22 may, for example, be con fi gured, if the noise generating mode is comfortable i or i. · ::. ± ·: 1: is the mode of gener :: d:::: :: ::. 11 :: - confortable -i :: 1 ::: * i ni - :: i · :: · Ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir ir. Is

For example, in t.xat, ifi, the signal processor can, for example, be a temple, ::: If the rv.id-: comfortable mode of generation is the comfortable mode of generation of v -:.: -: 1-: comfortable linear prediction domain, to generate the comfortable noise generating one of random excitation ,, climbing the se! To obtain an excit signal::: n: r-: rΛ a; / And synthesizing the scalar excitation signal; . Το inverse of LP *

For example, the comfortable noise gene can be used in crypt. , 1 (see Annex A) and / or in G.71B ivar-; ITO-T 1. 1&gt; reads. 6.12 and 7.12) * This, generation, of ru; Domain of excitation, random scalar ·:;: · un .; Eur-lex.europa.eu eur-lex.europa.eu I -i;.:: A: it ation, random to obtain an aen; Ida, and sintet 1 Bando la.

Signal of excita. The inverse filter of XF is well-known, and i, 5 illustrates a system according to a rn n]. I. The system. Cor; ::.; · ;; Where an apparatus 10 0 for encoding information of ni:; A · :; 1 to one of the embodiments previously described in order to generate a plurality of data. The information received from the received coded information is given to one of the embodiments previously described in claim 1, ; -: ripl a-

The selector 110 ·:!:.; :::::::::::::::::::::::::::: : · 'Donate a reliable noise generation mode: iui; L .: of I ::::. : A comfortable background noise generator modes: a background noise characteristic of an audio input signal, Unit of coding of the apparatus i 01 ···.: Ϊγβ encoding of audio information ¢ :: :: td configured to * encode the. Audio information, which comprises Lnl 0:01 :: - i ·: n so that it indicates the mode of generation · ::! 1: 1: or comfortably selected as :: :: :: o: 1: · d-: gen. ::: a :: i :::; • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Eur-lex.europa.eu eur-lex.europa.eu

On the other hand, 2-D coding, Kai'dt. 2 OD for: n: :: :: :: a signal of :: a. Audio output is set to re · 31 · ir le; And in addition is configured to: encode the coded information for: i: the mode information Encoded with the encoded audio information * Signal processor 22Q of the apparatus 20D for generating an audio output signal is configured to generate the audio output signal generating, according to the generation mode, indicated comfortable noise, comfortable noise .

Figure 3 illustrates a progressive approach to the following: : Ic de gen · noise ration ·:: nni ríai: i: according to a · hundred.

In Fig. 3: 1, a estimate of noise a ·· :: u :: n; [1.1 :::::: ·.: * Ina: energy da.i background noise in · :: ·! Domain of :::: - ::: -.: - :: :: ::::. 1 ::. You in Is performed bandwidth, producing an estimate of energy per band.

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It is possible to use any noise estimation that produces a bandwidth estimation of background noise. A noise emulator used in G * 71S (ITU-Γ G.7L3 Sec. G.7).

In step 320f the energy of the background noise in the low reluctance ae ct; qpi-: t - ::. Crondo

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With l, l and lz may depend on the bandwidth of the signal, for example ij - 1, Ι2 - 9 for me and 4 - 0, 12 - LO paca WB - l, it is considered as a low background noise value Re; · It has been described as described.

At step 330, the background noise energy at high frequencies is corrected using

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With Jj and 1,4 may be dependent on the width. Of the signal, by a I3-16,14,14-17 pore ME and / 3-151,44 "20 o: o WB. H can- consid :: · ;; - leave as a high-frequency background, as described above. 1, 303, 313 and 330 may be executed subsequently or independently of each other.

In step 340, the background noise is computed, or

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For example, proceed in accordance with step 350. At step 350, the background noise distortion is attenuated, Producing a long-term version of the background noise distortion

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A is for example 0.0. In this recursive equation, Tír on the left of the equal sign is if the current long-term distortion value Γ_, mentioned above, and TLr to the right of the equals sign is the previous long-term distortion value Innate *

In step 3 € 0, the CHG mode finally eg selected using the following classifier with hysteresis

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Where tfcrt arjd tkr2 may depend on bandwidth, for example - Q, thiz - 2 for NB and chrt - 45, E # tr2 - 10 for HE. Is the comfortable, noise-generating generation mode selected by selector 110. c.ng_aroc ;: y,: sv - :: a re:: -or.a lo (comfortable noise) upie has previously been ... on by the selector 11D, which ·:! ·: · None d-: .tu :. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - implementation. In one embodiment ,. [. · , any

Of the same conditions as the CMC can remain. As it was, so cng_mode = cng_a, od, e_p: rev

The embodiments may. 1: γ; ϊ:. R t t t t t. Some other embodiments, without. Wherein: A. If certain aspects are described in the context of an apparatus, which: It is clear that these aspects represent the method of the corresponding method, in which one of the following: 777: .- 75 runs to a stage of the method or ::. :::::::::::::::::::::::::::::::. 7: 7: 7: 7: 7: 7: 7: 7: 7: 7: 7 The context of a step Of the method of describing a block, corresponding element or a corresponding apparatus of a given apparatus.

The campus signal of the invention may be stored in a digital storage medium or may be transmitted by a transmission medium as a wireless transmission medium or a wired transmission medium such as the Internet "

According to certain implementation requirements, the embodiments of the invention may be implemented in hardware or in software. The implementation can be performed using digital storage media, such as a floppy disk, a DVD, an Elu-Ray, a CO, a ROM, a PROM, an EFROM, an EEFEOM or a FLASH memory, with electronically controlled signals (Or capable of cooperating) with a programmable computer system in such a way that they are synchronized with each other. Sludge ::: rt ►: ctivc.

Some rea; According to the invention comprise a non-transient data carrier with electromotive control signals 1, 2, 3, 4; Which are to be understood as co-operating with a system. - friendly grille, with the purpose i :: execute one of the methods. (I.e., the present one).

In general, the advantages of the present invention may be increased by: 1: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - He runs on a computer. .g ·; For example, to be il ;. ; Ri Capn / te machine readable. The computer program comprises a computer program, which is stored in an It-d medium, :: 1 - - :: - 01 - machine.

In other words, a region of a method of the invention is therefore a. Software that has a. Code to run one of the crypt methods, when the program runs on a computer "

A further embodiment of the methods of the invention is therefore a data carrier (or a digital storage medium, or a computer readable medium) 1 ¥: ***. (I.e. , 5 * ® *! * G * ®®®s I * 1 *? 1, 2, 3, 4, 5, 6, 7, 8, 10, &gt; 1 ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® ® 1, 4, 5.

"] U1 = ¡. (1). .: J. ·:! . (4-chlorophenyl) -1H-indole. -i. ·. ·. .................. (1)::::::::::::::::::::::::::::::::::: · Signals can for example ::: 011: / ::.: 00: ..:. ::.: O: • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • (I.e.

A :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 :: 1 ::: ::: ::: :: :: (I.e. I,:::::::::::::::::::::::::::::: ·: Π ::: ::: ::: in the present.

In some: · :: &lt;:. 1 :: :: :: :: :: :: ::. L: J v: · 1.:..:1 s: prc :: ..: r:.: Ín ::; i: 1 .. (by. ::::::::: 1.:. In general, the preferred values ​​are carried out by any of the above-mentioned kinetics, Merely illustrative examples of the present invention.

It remains that in art, they will warn, modi fi cations and variants thereafter. :. The invention will be at the very least:&gt;&gt; 0 or: or at the same time, and at the same time, The reader is: a: x: a.:; Hi :: :::: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: :: ::: 10: 1. same*