Lg Electronics Inc.

Chungbuk National University Industry-academic Cooperation Foundation

Chungbuk National University Industry Academic

Ingyu Kang

Hyejeong Jeon

Gyuhyeok Jeong

Lagyoung Kim

Byungsuk Lee

Younghan Lee

Daehwan Kim

Kibong Hong

Insung Lee

Changheon Lee

Zhigang Piao

Jongha Lim

Sanghyeon Moon

Byounggi Lee

Sungmoon Cho

The present specification discloses various embodiments of a digital device and a method for controlling the same. A method for controlling a digital device according to an embodiment of the present invention may comprise the steps of: connecting to a repeater; sensing an external device located within a preconfigured distance and connected to the repeater; receiving an audio reference data transmission request from the sensed external device; and transmitting the requested audio reference data to the external device.

Digital device and method for controlling same

The present invention relates to a method for processing an audio signal, comprising: a step of performing a frequency conversion process on an audio signal to obtain a plurality of frequency transform coefficients; a step of selecting either a general mode or a non-general mode, on the basis of a pulse ratio, for the frequency transform coefficients having a high frequency band from among the plurality of frequency transform coefficients; and a step of performing, if the non-general mode is selected, the following steps: extracting a predetermined number of pulses from the frequency transform coefficients having the high frequency band, and generating pulse information; generating an original noise signal from the frequency transform coefficients having the high frequency band, excluding the pulses; generating a reference noise signal using the frequency transform coefficient having a low frequency band from among the plurality of frequency transform coefficients; and generating noise position information and noise energy information using the original noise signal and the reference noise signal.

Method and apparatus for processing an audio signal

The present invention relates to a method for encoding a voice signal, a method for decoding a voice signal, and an apparatus using the same. The method for encoding the voice signal according to the present invention, includes the steps of: 

Method for encoding voice signal, method for decoding voice signal, and apparatus using same

The present invention relates to a frame loss recovering method, an audio decoding method, and an apparatus using the method. A method of recovering a frame loss of an audio signal according to the present invention includes: grouping transform coefficients of at least one frame into a predetermined number of bands among previous frames of a current frame; deriving an attenuation constant according to a tonality of the bands; and recovering transform coefficients of the current frame by applying the attenuation constant to the previous frame of the current frame.

Frame loss recovering method, and audio decoding method and device using same

The present invention relates to a method and apparatus for processing a voice signal, and the voice signal encoding method according to the present invention comprises the steps of: generating transform coefficients of sine wave components forming an input voice signal by transforming the sine wave components; determining transform coefficients to be encoded from the generated transform coefficients; and transmitting indication information indicating the determined transform coefficients, wherein the indication information may include position information, magnitude information, and sign information of the transform coefficients.

Voice signal encoding method, voice signal decoding method, and apparatus using same

The present invention relates to a method and device for quantizing voice signals in a band-selective manner. A voice decoding method may include inversely quantizing voice parameter information produced from a selectively quantized voice band and performing inverse transform on the basis of the inversely quantized voice parameter information. Thus, according to the present invention, coding/decoding efficiency in voice coding/decoding may be increased by selectively coding/decoding important information.

Method and device for quantizing voice signals in a band-selective manner

The present invention relates to a method of managing a jitter buffer and a jitter buffer using same. The method of managing a jitter buffer includes the steps of: receiving audio information frames; and adjusting a jitter buffer on the basis of the received audio information frames, wherein the adjusting step of the jitter buffer includes compensation of an audio signal, and the compensation of the audio signal can be performed for each sub frame of the audio information frames.

Method of managing a jitter buffer, and jitter buffer using same

The present invention provides a method for processing audio signals, and the method comprises the steps of: receiving input audio signals corresponding to a plurality of spectral coefficients; obtaining location information that indicates a location of a particular spectral coefficient among said spectral coefficients, on the basis of energy of said input signals: generating a shape vector by using said location information and said spectral coefficients; determining a codebook index by searching for a codebook corresponding to said shape vector; and transmitting said codebook index and said location information, wherein said shape vector is generated by using a part which is selected from said spectral coefficients, and said selected part is selected on the basis of said location information.

Method for processing audio signals, involves determining codebook index by searching for codebook corresponding to shape vector generated by using location information and spectral coefficients

The present invention relates to a method for processing an audio signal, comprising: determining bandwidth information indicating to which of a plurality of bands the current frame corresponds; determining information on the order corresponding to the present frame on the basis of the bandwidth information; performing a linear predictive analysis of the present frame to generate a first set linear predictive transform coefficient of a first order; performing a vector quantization on the first set linear predictive coefficient to generate a first index; performing a linear predictive analysis of the current frame to generate a second set linear predictive transform coefficient of a second order in accordance with the information on the order; and performing a vector quantization on a second set difference by using the first set index and the second set linear predictive transform coefficient, when the second set linear predictive coefficient is generated.

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Seoul, South Korea

Ingyu Kang