Patent application number | Description | Published |
20090157411 | METHODS AND APPARATUSES FOR ENCODING AND DECODING OBJECT-BASED AUDIO SIGNALS - An audio encoding method and apparatus and an audio decoding method and apparatus are provided. The audio signal decoding method includes extracting a downmix signal and object-based side information from an audio signal; generating a modified downmix signal based on the downmix signal and extracted information which is extracted from the object-based side information; generating channel-based side information based on the object-based side information and control data for rendering the downmix signal; and generating a multi-channel audio signal based on the modified downmix signal and the channel-based side information. | 06-18-2009 |
20090164221 | METHODS AND APPARATUSES FOR ENCODING AND DECODING OBJECT-BASED AUDIO SIGNALS - Provided are an audio encoding method and apparatus and an audio decoding method and apparatus in which audio signals can be encoded or decoded so that sound images can be localized at any desired position for each object audio signal. The audio decoding method includes extracting a downmix signal and object-based side information from an audio signal; generating channel-based side information based on object-based side information and control information for rendering the downmix signal; processing the downmix signal using a decorrelated channel signal; and generating a multi-channel audio signal using the processed downmix signal and the channel-based side information. | 06-25-2009 |
20090164222 | METHODS AND APPARATUSES FOR ENCODING AND DECODING OBJECT-BASED AUDIO SIGNALS - Provided are an audio encoding method and apparatus and an audio decoding method and apparatus in which audio signals can be encoded or decoded so that sound images can be localized at any desired position for each object audio signal. The audio decoding method includes extracting a downmix signal and object-based side information from an input audio signal; generating rendering information based on input control data; and generating spatial information based on the rendering information and the object-based side information. | 06-25-2009 |
20100070272 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - An apparatus for processing an encoded signal and method thereof are disclosed, by which an audio signal can be compressed and reconstructed in higher efficiency. An audio signal processing method includes the steps of identifying whether a coding type of the audio signal is a music signal coding type using first type information, if the coding type of the audio signal is not the music signal coding type, identifying whether the coding type of the audio signal is a speech signal coding type or a mixed signal coding type using second type information, if the coding type of the audio signal is the mixed signal coding type, extracting spectral data and a linear predictive coefficient from the audio signal, generating a residual signal for linear prediction by performing inverse frequency conversion on the spectral data, reconstructing the audio signal by performing linear prediction coding on the linear predictive coefficient and the residual signal, and reconstructing a high frequency region signal using an extension base signal corresponding to a partial region of the reconstructed audio signal and band extension information. Accordingly, various kinds of audio signals can be encoded/decoded in higher efficiency. | 03-18-2010 |
20100070285 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - The present invention includes receiving a plurality of frame data including first frame data and second frame data encoded by at least one coding schemes, obtaining first flag information indicating whether the first frame data and the second frame data are encoded by frequency domain transform coding scheme, respectively, decoding the first frame data by frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by frequency domain transform coding scheme, obtaining second flag information indicating whether subframe data is encoded by time domain transform coding scheme or time-frequency domain coding scheme when the second frame data is not encoded by frequency domain transform coding scheme, the at least two subframe data being included in the second frame data, decoding the subframe data by time domain transform coding scheme or time-frequency domain transform coding scheme based on the second flag information, and compensating for discontinuity existing between the first frame data decoded by frequency domain transform coding scheme and the subframe data decoded by time domain transform coding scheme, wherein the time-frequency domain coding scheme is time domain coding scheme including frequency domain transform. | 03-18-2010 |
20100079185 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed. The present invention includes receiving (a) downmix signal being generated from plural-channel signal and (b) spatial information indicating attribute of the plural-channel signal in order to upmix the downmix signal and including phase shift flag indicating whether phase of a frame of at least one channel of the plural-channel signal is shifted; obtaining inter-channel phase difference (IPD) coding flag indicating whether IPD value is used to the spatial information from a header of the spatial information; obtaining IPD mode flag indicating whether the IPD value is used to frame of the spatial information from the frame based on the IPD coding flag; obtaining the IPD value of parameter band in the frame, based on the IPD mode flag; upmixing plural-channel signal by applying the IPD value to the downmix signal; and shifting the phase of the frame of the at least one channel of the plural-channel signal based on the phase shift flag. | 04-01-2010 |
20100079187 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed. The present invention includes receiving a downmix signal generated from plural channel signal and spatial information indicating attribute of the plural channel signal to upmix the downmix signal; obtaining inter-channel phase difference (IPD) coding flag indicating whether IPD value is used to the spatial information from header of the spatial information; obtaining IPD mode flag based on the IPD coding flag from the frame of the spatial information, the IPD mode flag indicating whether the IPD value is used to a frame of the spatial information; obtaining the IPD value of parameter band of parameter time slot in the frame, based on the IPD mode flag; smoothing the IPD value by modifying the IPD value by using IPD value of previous parameter time slot; and generating plural channel signal by applying the smoothed IPD value to the downmix signal. | 04-01-2010 |
20100085102 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed. The present invention includes receiving (a) a downmix signal being generated from plural-channel signal and (b) spatial information indicating attribute of the plural-channel signal, in order to upmix the downmix signal; obtaining inter-channel phase difference(IPD) coding flag indicating whether IPD value is used to the spatial information from a header of the spatial information; obtaining IPD mode flag indicating whether the IPD is used to frame of the spatial information from the frame based on the IPD coding flag; obtaining the IPD value from a parameter band in the frame based on the IPD mode flag; generating plural-channel signal by applying the IPD value to the downmix signal, wherein the spatial information is divided by header and a plurality of the frame and wherein the IPD value indicates phase difference between two channels of the plural-channel signal and wherein the parameter band is at least one sub-band of frequency domain including the IPD value. | 04-08-2010 |
20100114568 | APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF - An apparatus for processing an audio signal and method thereof are disclosed, by which extracting, by an audio processing apparatus, scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; and, when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme. | 05-06-2010 |
20100114583 | APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF - An apparatus for processing an audio signal and method thereof are disclosed. The present invention includes receiving a spectral data of lower band and type information indicating a particular band extension scheme for a current frame of the audio signal from among a plurality of band extension schemes including a first band extension scheme and a second band extension scheme, by an audio processing apparatus; when the type information indicates the first band extension scheme for the current frame, generating a spectral data of higher band in the current frame using the spectral data of lower band by performing the first band extension scheme; and when the type information indicates the second band extension scheme for the current frame, generating the spectral data of higher band in the current frame using the spectral data of lower band by performing the second band extension scheme, wherein the first band extension scheme is based on a first data area of the spectral data of lower band, and wherein the second band extension scheme is based on a second data area of the spectral data of lower band. | 05-06-2010 |
20100114585 | APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF - An apparatus for processing an audio signal and method thereof are disclosed, by which a method for processing an audio signal, comprising: extracting noise filling flag information indicating whether noise filling is used to a plurality of frames; extracting coding scheme information indicating whether a current frame included in the plurality of frames is coded in either a frequency domain or a time domain; when the noise filling flag information indicates that the noise filling is used to for the plurality of frames and the coding scheme information indicates that the current frame is coded in the frequency domain, extracting noise level information for the current frame; when a noise level value corresponding to the noise level information meets a predetermined level, extracting noise offset information for the current frame; and, when the noise offset information is extracted, performs the noise-filling for the current frame based on the noise level value and the noise offset information. | 05-06-2010 |
20100201550 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed. The present invention includes receiving a maximum number of band and a code value of at least one section length, calculating a bit number corresponding to the code value of the at least one section length using the maximum number of the band, and obtaining the section length information by decoding the code value of the section length based on the bit number. A method of processing a signal is disclosed. The present invention includes receiving factor information of a current frame, receiving flag information indicating whether a coding mode of the factor information is an absolute value mode or a relative value mode, and obtaining factor data of the current frame using factor data of a previous frame and the received factor information based on the flag information. | 08-12-2010 |
20100215096 | METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed. The present invention includes receiving a maximum number of band and a code value of at least one section length, calculating a bit number corresponding to the code value of the at least one section length using the maximum number of the band, and obtaining the section length information by decoding the code value of the section length based on the bit number. A method of processing a signal is disclosed. The present invention includes receiving factor information of a current frame, receiving flag information indicating whether a coding mode of the factor information is an absolute value mode or a relative value mode, and obtaining factor data of the current frame using factor data of a previous frame and the received factor information based on the flag information. | 08-26-2010 |
20100292994 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - A method of processing an audio signal is disclosed. The present invention includes receiving spectral data corresponding to a first band in a frequency band including the first band and a second band, determining a copy band based on frequency information of the copy band corresponding to a partial band of the first band, and generating spectral data of a target band corresponding to the second band using the spectral data of the copy band, wherein the copy band exists in an upper part of the first band. | 11-18-2010 |
20110015768 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - A method of processing an audio signal is disclosed. The present invention includes obtaining spectral data and a loss signal compensation parameter, detecting a loss signal based on the spectral data, generating first compensation data corresponding to the loss signal using a random signal based on the loss signal compensation parameter, and generating a scale factor corresponding to the first compensation data and generating second compensation data by applying the scale factor to the first compensation data. | 01-20-2011 |
20110196685 | METHODS AND APPARATUSES FOR ENCODING AND DECODING OBJECT-BASED AUDIO SIGNALS - Provided are an audio encoding method and apparatus and an audio decoding method and apparatus in which audio signals can be encoded or decoded so that sound images can be localized at any desired position for each object audio signal. The audio decoding method generating a third downmix signal by combining a first downmix signal extracted from a first audio signal and a second downmix signal extracted from a second audio signal; generating third object-based side information by combining first object-based side information extracted from the first audio signal and second object-based side information extracted from the second audio signal; converting the third object-based side information into channel-based side information; and generating a multi-channel audio signal using the third downmix signal and the channel-based side information. | 08-11-2011 |
20120226496 | APPARATUS FOR PROCESSING A SIGNAL AND METHOD THEREOF - An apparatus for processing a signal and method thereof are disclosed. The present invention includes receiving coding mode information indicating a speech coding scheme or an audio coding scheme, linear prediction coding degree information indicating a linear prediction coding degree, and the signal including at least one of a speech signal and an audio signal; decoding the signal according to the speech coding scheme or the audio coding scheme based on the coding mode information; decoding linear prediction coding coefficients of the signal based on the linear prediction coding degree information; and generating an output signal by applying the decoded linear prediction coding coefficients to the decoded signal. In this case, the linear prediction coding degree information is determined based on a variation of a value of an LPC residual generated from performing the linear prediction coding on the signal. | 09-06-2012 |
20140303985 | METHODS AND APPARATUSES FOR ENCODING AND DECODING OBJECT-BASED AUDIO SIGNALS - Provided are an audio encoding method and apparatus and an audio decoding method and apparatus in which audio signals can be encoded or decoded so that sound images can be localized at any desired position for each object audio signal. The audio decoding method generating a third downmix signal by combining a first downmix signal extracted from a first audio signal and a second downmix signal extracted from a second audio signal; generating third object-based side information by combining first object-based side information extracted from the first audio signal and second object-based side information extracted from the second audio signal; converting the third object-based side information into channel-based side information; and generating a multi-channel audio signal using the third downmix signal and the channel-based side information. | 10-09-2014 |