Abstract: Provided is an apparatus and method for encoding/decoding a moving picture based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode.

Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.

Abstract: A Method for processing an audio signal to use a beamforming technique in a three-dimensional (3D) space is disclosed. The method may include generating a beamforming signal on a horizontal plane related to a sound source in a three-dimensional (3D) space and modulating the beamforming signal to head for a listener in the 3D space from the sound source.

Abstract: Provided is an apparatus and method for encoding/decoding a moving picture based on adaptive scanning. The moving picture apparatus and method can increase a compression rate based on adaptive scanning by performing intra prediction onto blocks of a predetermined size, and scanning coefficients acquired from Discrete Cosine Transform (DCT) of a residue signal and quantization differently according to the intra prediction mode. The moving picture encoding apparatus includes: a mode selector for selecting and outputting a prediction mode; a predictor for predicting pixel values of pixels to be encoded of an input video based on the prediction mode to thereby output a residue signal block; a transform/quantization unit for performing DCT onto the residue signal block and quantizing the transformed residue signal block; and an encoder for adaptively scanning and encoding the quantized residue signal block based on the prediction mode.

Abstract: Provided is a method and apparatus for reproducing a three-dimensional (3D) sound field. A method of reproducing a 3D sound field may determine a control region based on a wavelength of an excitation frequency, set, based on a loudspeaker array, at least one candidate control point in the control region, and determine a non-uniform control point corresponding to a non-uniform loudspeaker.

Abstract: Provided is an acoustic processing apparatus capable of optional sound shielding that may selectively control a sound entering an acoustically shielded interior of a building or a vehicle and form a pleasant acoustic environment, including an acoustic receiver to obtain at least one external acoustic signal, an acoustic signal processor to process the obtained external acoustic signal, and a player to internally play the processed acoustic signal through at least one speaker.

Abstract: An apparatus and method for separating a multi-channel audio signal that separates a multi-channel audio signal into a plurality of sound source objects is disclosed, the apparatus including a multi-channel stereo transformer to transform a multi-channel audio signal into a plurality of stereo signals, and a stereo sound source separator to separate the plurality of stereo signals into a plurality of sound source objects.

Abstract: An audio encoding apparatus and method that encodes hybrid contents including an object sound, a background sound, and metadata, and an audio decoding apparatus and method that decodes the encoded hybrid contents are provided. The audio encoding apparatus may include a mixing unit to generate an intermediate channel signal by mixing a background sound and an object sound, a matrix information encoding unit to encode matrix information used for the mixing, an audio encoding unit to encode the intermediate channel signal, and a metadata encoding unit to encode metadata including control information of the object sound.

Abstract: Disclosed are an apparatus and method of surround wave field synthesizing a multi-channel signal excluding sound image localization information. A wave field synthesis and reproduction apparatus may include a signal classification unit to classify an inputted multi-channel signal into a primary signal and an ambient signal, a sound image localization information estimation unit to estimate sound image localization information of the primary signal and sound image localization information of the ambient signal, and a rendering unit to render the primary signal and the ambient signal based on the sound image localization information of the primary signal, the sound image localization information of the ambient signal, and listener environment information.

Abstract: Disclosed is a binaural rendering method and apparatus for decoding a multichannel audio signal. The binaural rendering method may include: extracting an early reflection component and a late reverberation component from a binaural filter; generating a stereo audio signal by performing binaural rendering of a multichannel audio signal base on the early reflection component; and applying the late reverberation component to the generated stereo audio signal.

Abstract: Provided are a method of encoding and decoding a multichannel audio signal, and an encoder and a decoder to perform the method. The present invention may perform encoding into consideration of a size of bit to be allocated based on a feature of audio signal for each channel with respect to an audio signal having a plurality of channels, thereby enhancing an encoding efficiency of the multichannel audio signal.

Abstract: Disclosed is a method of estimating a position by a position estimation system. The method includes generating a time-synchronization signal for position determination using a genetic algorithm, embedding the generated time-synchronization signal in an audio signal, and replaying the audio signal embedded with the time-synchronization signal through a speaker, receiving the audio signal embedded with the time-synchronization signal in a microphone, calculating a time delay value of the time-synchronization signal embedded in the received audio signal, and estimating a position of the microphone based on the calculated time delay value.

Abstract: Provided is a method for controlling synchronizing downmix signals and MPEG surround side information signals by controlling a delay according to the kind of downmix audio signals in an MPEG surround decoder. When multi-channel audio signals are restored using an HE-AAC decoder and a low-power MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter. Anther delay unit delays spatial parameters to compensate for a delay caused in QMF and Nyquist banks when time-domain downmix signals are used. Also, when multi-channel audio signals are restored using an HE-AAC decoder and a high-quality MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter.

Abstract: Provided are an object-based three dimensional (3-D) audio service system using preset audio scenes and a method thereof. The system and the method are suggested for enabling a user to easily and conveniently watch and listen an object based 3-D audio service by eliminating inconvenience that requires a user to control each of object audio signals of sound sources. The system includes: audio input means for inputting an audio signal; preset audio scene generating means for extracting object audio signals from the audio signal inputted through the audio input means and generating more than one of 3-D audio scene information by arranging the extracted object audio signals in a 3-D space and editing features of each object; and encoding means for encoding and multiplexing the audio signal and the 3-D audio scene information for each object audio signal.

Abstract: Disclosed are an apparatus and a method of providing contents. The apparatus of providing the contents may include a receiving unit to receive, from a contents provider, contents and information about a contents providing location, a local group setting unit to search for at least one cell based on the information about the contents providing location and to set the retrieved cell as a content providing location group of the contents, and a transmitting unit to transmit the contents to the set content providing location group. The object based audio contents may be consecutively replayed based on an identical audio preset.

Abstract: An apparatus and method for generating multimedia data and an apparatus and method for playing multimedia data are disclosed. The apparatus for generating the multimedia data may include a spatial information identification unit to identify spatial information for a plurality of channels of a multi-channel audio signal, and a multimedia data generation unit to generate multimedia data including the spatial information, and the apparatus for playing the multimedia data may include a spatial information analysis unit to analyze spatial information for a plurality of channels of a multi-channel audio signal included in multimedia data, and a multimedia data playback unit to play multimedia data, based on the spatial information.

Abstract: A method of encoding a multi-object audio signal and an encoding apparatus, a decoding method and a decoding apparatus, and a transcoding method and a transcoder are provided. A multi-object audio signal encoding apparatus may encode object signals obtained by excluding ForeGround Objects (FGOs) from a plurality of input object signals, and may encode the FGOs, thereby providing a listener with a satisfactory sound quality.

Abstract: Provided are an object-based three dimensional (3-D) audio service system using preset audio scenes and a method thereof. The system and the method are suggested for enabling a user to easily and conveniently watch and listen an object based 3-D audio service by eliminating inconvenience that requires a user to control each of object audio signals of sound sources. The system includes: audio input means for inputting an audio signal; preset audio scene generating means for extracting object audio signals from the audio signal inputted through the audio input means and generating more than one of 3-D audio scene information by arranging the extracted object audio signals in a 3-D space and editing features of each object; and encoding means for encoding and multiplexing the audio signal and the 3-D audio scene information for each object audio signal.

Abstract: Provided are an apparatus and method for coding and decoding a multi object audio signal with multi channel. The apparatus includes: a multi channel encoding means for down-mixing an audio signal including a plurality of channels, generating a spatial cue for the audio signal including the plurality of channels, and generating first rendering information including the generated spatial cue; and a multi object encoding unit for down-mixing an audio signal including a plurality of objects, which includes the down-mixed signal from the multi channel encoding unit, generating a spatial cue for the audio signal including the plurality of objects, and generating second rendering information including the generated spatial cue, wherein the multichannel encoding unit generates a spatial cue for the audio signal including the plurality of objects regardless of a Coder-DECoder (CODEC) scheme the limits the multi channel encoding unit.

Abstract: Provided are an apparatus and method for coding and decoding a multi-object audio signal. The apparatus includes a down-mixer for down-mixing the audio signals into one down-mixed audio signal and extracting supplementary information including header information and spatial cue information for each of the audio signals, a coder for coding the down-mixed audio signal, and a supplementary information coder for generating the supplementary information as a bit stream. The header information includes identification information for each of the audio signals and channel information for the audio signals.