Patent application number | Description | Published |
20100145688 | Method and apparatus for encoding/decoding speech signal using coding mode - An apparatus and a method to encode and decode a speech signal using an encoding mode are provided. An encoding apparatus may select an encoding mode of a frame included in an input speech signal, and encode a frame having an unvoiced mode for an unvoiced speech as the selected encoding mode. | 06-10-2010 |
20100268542 | APPARATUS AND METHOD OF AUDIO ENCODING AND DECODING BASED ON VARIABLE BIT RATE - An apparatus and method of audio encoding and decoding based on a Variable Bit Rate (VBR) is provided. The audio encoding and decoding apparatus and method may determine an optimum bit rate per superframe and per frame, determine an optimum encoding mode by applying an open-loop mode/closed-loop mode based on a characteristic of an audio signal, and perform indexing based on the optimum encoding mode. | 10-21-2010 |
20100324912 | Context-based arithmetic encoding apparatus and method and context-based arithmetic decoding apparatus and method - Disclosed are a context-based arithmetic encoding apparatus and method and a context-based arithmetic decoding apparatus and method. The context-based arithmetic decoding apparatus may determine a context of a current N-tuple to be decoded, determine a Most Significant Bit (MSB) context corresponding to an MSB symbol of the current N-tuple, and determine a probability model using the context of the N-tuple and the MSB context. Subsequently, the context-based arithmetic decoding apparatus may perform a decoding on an MSB based on the determined probability model, and perform a decoding on a Least Significant Bit (LSB) based on a bit depth of the LSB derived from a process of decoding on an escape code. | 12-23-2010 |
20110255588 | APPARATUS AND METHOD FOR ENCODING AND DECODING MULTICHANNEL SIGNAL - Disclosed is an apparatus for encoding and decoding multi-channel signals. The apparatus for encoding the multi-channel signals may shift a phase of the multi-channel signals based on a characteristic of the multi-channel signals. An encoded bitstream with respect to the multi-channel signals may be generated using a downmix signal and a residual signal extracted from the phase-shifted multi-channel signals. | 10-20-2011 |
20110257968 | APPARATUS FOR ENCODING/DECODING MULTICHANNEL SIGNAL AND METHOD THEREOF - Provided is an encoding/decoding apparatus and method of multi-channel signals. The encoding apparatus and method of multi-channel signals may encode phase information of the multi-channel signals using a quantization scheme and a lossless encoding scheme, and the decoding apparatus and method of multi-channel signals may decode the phase information using an inverse-quantization scheme and a lossless decoding scheme. | 10-20-2011 |
20110295600 | Apparatus and method determining weighting function for linear prediction coding coefficients quantization - An apparatus determining a weighting function for line prediction coding coefficients quantization converts a linear prediction coding (LPC) coefficient of an input signal into one of a line spectral frequency (LSF) coefficient and an immitance spectral frequency (ISF) coefficient and determines a weighting function associated with one of an importance of the ISF coefficient and importance of the LSF coefficient using one of the converted ISF coefficient and the converted LSF coefficient. | 12-01-2011 |
20120020482 | APPARATUS AND METHOD FOR ENCODING AND DECODING MULTI-CHANNEL AUDIO SIGNAL - Disclosed is an apparatus for encoding and decoding a multi-channel audio signal. The apparatus for encoding the multi-channel audio signal groups channels of a multi-channel audio signal, eliminates redundant information between channels using a mixing matrix including phase information, converts a frequency of the signal, and encodes the signal. | 01-26-2012 |
20120065965 | Apparatus and method for encoding and decoding signal for high frequency bandwidth extension - An apparatus and method for encoding and decoding a signal for high frequency bandwidth extension are provided. An encoding apparatus may down-sample a time domain input signal, may core-encode the down-sampled time domain input signal, may transform the core-encoded time domain input signal to a frequency domain input signal, and may perform bandwidth extension encoding using a basic signal of the frequency domain input signal. | 03-15-2012 |
20120070007 | APPARATUS AND METHOD FOR BANDWIDTH EXTENSION FOR MULTI-CHANNEL AUDIO - A method and apparatus of effectively encoding and decoding a high-frequency signal of a multi-channel audio are provided. A multi-channel audio decoding apparatus may down-mix a multi-channel audio input signal, expand a number of channels of the down-mixed signal, select at least one of the expanded channel signal, extract a parameter indicating a characteristic relation between the selected signal and the multi-channel audio input signal, and encode the down-mixed signal and the extracted parameter. | 03-22-2012 |
20120093321 | APPARATUS AND METHOD FOR ENCODING AND DECODING SPATIAL PARAMETER - An apparatus and method for encoding and decoding a spatial parameter are provided. A spatial parameter encoding apparatus may encode a spatial parameter using a correlation between spatial parameters indicating a characteristic relationship between channels of a multi-channel audio signal, so that the multi-channel audio signal may be efficiently encoded. | 04-19-2012 |
20120095756 | Apparatus and method for determining weighting function having low complexity for linear predictive coding (LPC) coefficients quantization - Proposed is a method and apparatus for determining a weighting function for quantizing a linear predictive coding (LPC) coefficient and having a low complexity. The weighting function determination apparatus may convert an LPC coefficient of a mid-subframe of an input signal to one of a immitance spectral frequency (ISF) coefficient and a line spectral frequency (LSF) coefficient, and may determine a weighting function associated with an importance of the ISF coefficient or the LSF coefficient based on the converted ISF coefficient or LSF coefficient. | 04-19-2012 |
20120101825 | METHOD AND APPARATUS FOR ENCODING/DECODING AUDIO DATA WITH SCALABILITY - Method and apparatus for encoding/decoding audio data with scalability are provided. The method includes slicing audio data to correspond to a plurality of layers, obtaining scale band information and coding band information corresponding to each of the plurality of layers, coding additional information containing scale factor information and coding model information based on scale band information and coding band information corresponding to a first layer, obtaining quantized samples by quantizing audio data corresponding to the first layer with reference to the scale factor information, coding the obtained plurality of quantized samples in units of symbols in order from respective symbols formed with most significant bits (MSB) to least significant bits (LSB) based on the coding model information, and repeating, until coding for the plurality of layers is finished. Accordingly, fine grain scalability can be provided with lower complexity and better audio quality even in a lower layer. | 04-26-2012 |
20120213379 | APPARATUS FOR ENCODING/DECODING MULTICHANNEL SIGNAL AND METHOD THEREOF - Provided is an encoding/decoding apparatus and method of multi-channel signals. The encoding apparatus and method of multi-channel signals may encode phase information of the multi-channel signals using a quantization scheme and a lossless encoding scheme, and the decoding apparatus and method of multi-channel signals may decode the phase information using an inverse-quantization scheme and a lossless decoding scheme. | 08-23-2012 |
20120221325 | CONTEXT-BASED ARITHMETIC ENCODING APPARATUS AND METHOD AND CONTEXT-BASED ARITHMETIC DECODING APPARATUS AND METHOD - Disclosed are a context-based arithmetic encoding apparatus and method and a context-based arithmetic decoding apparatus and method. The context-based arithmetic decoding apparatus may determine a context of a current N-tuple to be decoded, determine a Most Significant Bit (MSB) context corresponding to an MSB symbol of the current N-tuple, and determine a probability model using the context of the N-tuple and the MSB context. Subsequently, the context-based arithmetic decoding apparatus may perform a decoding on an MSB based on the determined probability model, and perform a decoding on a Least Significant Bit (LSB) based on a bit depth of the LSB derived from a process of decoding on an escape code. | 08-30-2012 |
20120271629 | APPARATUS FOR QUANTIZING LINEAR PREDICTIVE CODING COEFFICIENTS, SOUND ENCODING APPARATUS, APPARATUS FOR DE-QUANTIZING LINEAR PREDICTIVE CODING COEFFICIENTS, SOUND DECODING APPARATUS, AND ELECTRONIC DEVICE THEREFORE - A quantizing apparatus is provided that includes a quantization path determiner that determines a path from a first path not using inter-frame prediction and a second path using the inter-frame prediction, as a quantization path of an input signal, based on a criterion before quantization of the input signal; a first quantizer that quantizes the input signal, if the first path is determined as the quantization path of the input signal; and a second quantizer that quantizes the input signal, if the second path is determined as the quantization path of the input signal. | 10-25-2012 |
20120278069 | METHOD OF QUANTIZING LINEAR PREDICTIVE CODING COEFFICIENTS, SOUND ENCODING METHOD, METHOD OF DE-QUANTIZING LINEAR PREDICTIVE CODING COEFFICIENTS, SOUND DECODING METHOD, AND RECORDING MEDIUM AND ELECTRONIC DEVICE THEREFOR - A quantizing method is provided that includes quantizing an input signal by selecting one of a first quantization scheme not using an inter-frame prediction and a second quantization scheme using the inter-frame prediction, in consideration of one or more of a prediction mode, a predictive error and a transmission channel state. | 11-01-2012 |
20120288117 | NOISE FILLING AND AUDIO DECODING - A noise filling method is provided that includes detecting a frequency band including a part encoded to 0 from a spectrum obtained by decoding a bitstream; generating a noise component for the detected frequency band; and adjusting energy of the frequency band in which the noise component is generated and filled by using energy of the noise component and energy of the frequency band including the part encoded to 0. | 11-15-2012 |
20120290307 | BIT ALLOCATING, AUDIO ENCODING AND DECODING - A bit allocating method is provided that includes determining the allocated number of bits in decimal point units based on each frequency band so that a Signal-to-Noise Ratio (SNR) of a spectrum existing in a predetermined frequency band is maximized within a range of the allowable number of bits for a given frame; and adjusting the allocated number of bits based on each frequency band. | 11-15-2012 |
20130110522 | ENERGY LOSSLESS-ENCODING METHOD AND APPARATUS, AUDIO ENCODING METHOD AND APPARATUS, ENERGY LOSSLESS-DECODING METHOD AND APPARATUS, AND AUDIO DECODING METHOD AND APPARATUS | 05-02-2013 |
20130282368 | APPARATUS AND METHOD FOR ENCODING/DECODING FOR HIGH FREQUENCY BANDWIDTH EXTENSION - A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The coding apparatus may down-sample an input signal, perform core coding on the down-sampled input signal, perform frequency transformation on the input signal, and perform bandwidth extension coding by using a base signal of the input signal in a frequency domain. | 10-24-2013 |
20140046670 | AUDIO ENCODING METHOD AND APPARATUS, AUDIO DECODING METHOD AND APPARATUS, AND MULTIMEDIA DEVICE EMPLOYING THE SAME - Provided is a method of encoding an audio signal. A method of encoding an audio signal includes generating a modified signal of a time domain to compensate a frequency resolution in frame units, analysis-windowing the modified signal of the time domain by using a window type which is designed to have an overlapping section less than 50%, and generating transform coefficients of a frequency domain by transforming the analysis-windowed signal of the time domain. | 02-13-2014 |
20140074461 | METHOD AND APPARATUS FOR ENCODING/DECODING SPEECH SIGNAL USING CODING MODE - An apparatus and a method to encode and decode a speech signal using an encoding mode are provided. An encoding apparatus may select an encoding mode of a frame included in an input speech signal, and encode a frame having an unvoiced mode for an unvoiced speech as the selected encoding mode. | 03-13-2014 |
20140333529 | APPARATUS AND METHOD OF CONTROLLING DISPLAY APPARATUS - Provided are an apparatus and a method of controlling a display apparatus. The method includes presenting a stimulus to a user by using information regarding a user environment, obtaining, from the user, an electroencephalogram (EEG) signal in response to the stimulus, and controlling the display apparatus based on the EEG signal. By using the apparatus and the method of controlling the display apparatus, an appropriate type of a stimulus may be presented to the user based on the information regarding the user environment. Thus, the user may conveniently operate the display apparatus, and may accurately operate the display apparatus according to an intention of the user. | 11-13-2014 |