Abstract:
다양한 채널로 구성된 다객체 오디오 신호의 부호화 및 복호화 장치 및 방법에 관한 것으로서, 다양한 채널을 갖는 다객체 오디오 신호를 부호화 및 복호화하며, 종래SAC 비트스트림에 대한 역호환성을 제공하는 다양한 채널로 구성된 다객체 오디오 신호 부호화 및 복호화 장치 및 방법이 개시됨. 부호화 장치로 입력되는 오디오 객체 신호를 공간큐 기반으로 부호화하고 상기 부호화된 오디오 객체 신호에 대한 랜더링 정보를 생성하는 오디오 객체 부호화 수단을 포함하되, 상기 랜더링 정보는 상기 오디오 객체 신호에 대한 공간큐 정보; 상기 오디오 객체 신호의 채널 정보; 및 상기 오디오 객체 신호의 식별 정보를 포함하는 부호화 장치가 개시됨. 오디오 신호의 부호화 및 복호화에서 이용됨. 오디오 객체, 다객체, 비트스트림
Abstract:
PURPOSE: An object-based audio file providing device, an object-based audio file reproducing device are provided to perform an object-based audio service even in a user terminal of a low specification. CONSTITUTION: An object based audio file includes a file header for an object-based audio service and a frame with a sound source which mixed each frame and total audio objects. An object-based audio file is received(S701). According to specification of an object-based audio file reproducing device, the object-based audio file is reproduced by controlling sound source which mixed the total audio objects(S702).
Abstract:
PURPOSE: An access system selection device in heterogeneous wireless communication system and a method thereof are provided to select an access system based on a plurality of attributes and to receives a service, thereby preventing a service quality conveniently. CONSTITUTION: An access system specifying module(205) connects to an access system by activation of a relevant module in an access system. A CPC(Cognitive Pilot Channel, Common Pilot Channel) specific module(210) receives information of each access system and frequency allocation information of each access system and a load level from a CPC server. If a QoS(Quality of Service) is under the predetermined threshold value, a control unit(220) selects an optimum access system.
Abstract:
PURPOSE: A method and an apparatus for generating and playing an object based audio contents are provided to continuously play plural object-based audio contents according to the same audio preset. CONSTITUTION: A preset generating unit(110) generates an audio preset, and the audio preset includes the information on the plural audio objects which constitute audio contents. A preset ID setup unit(120) sets up the preset ID of the generated audio preset, and an encoding unit(140) encodes the plural audio objects, the audio preset and the preset ID. The encoding unit generates the object based audio contents.
Abstract:
PURPOSE: A multichannel audio decoding apparatus based on the sound source localization proviso and a method thereof are provided, which compress the multi-channel audio signal, and then, transmit the stereo signal through the core stereo codec under compression condition, thereby the multichannel audio electrical transmission is realized. CONSTITUTION: An audio decoding part(220) restores the downmix signal to the former state. An integrated up-mixing unit(240) predicts the multi channel signal by the downmix signal and additional information bit stream. The integration up-mixing part creates the up-mixing signal with the up-mixing of the MIX signal. An integrated filter bank windowing unit(250) extracts the temporal area signal by the performance of the integrated filter bank in the up-mixing signal. The integrated filter bank windowing part extracts the output signal by the windowing of the up-mixing signal.
Abstract:
PURPOSE: An encoding and decoding apparatus for a linear predictive coder residual signal of a modified discrete cosine transform based an unified speech and an audio coding are provided to perform encoding/decoding by expressing a residual signal as a complex signal. CONSTITUTION: A signal analyzing unit(110) selects a coding method of a signal filtered LPC. A first encoding unit(120) encodes a residual signal of LPC based on real filter bank according to the selection of the signal analyzing unit. A second encoding unit encodes a residual signal of LPC based on complex filter bank according to the selection of the signal analyzing unit. A third encoding unit encodes a residual signal of LPC based on ACELP(Algebraic Code Excited Linear Prediction) according to the selection of the signal analyzing unit.
Abstract:
PURPOSE: An encoding and decoding device during conversion between a coder based on an MDCT and a heterogeneous coder are provided to integrate an audio coder based on an MDCT with another audio coder to minimize MDCT information when encoding or decoding an audio signal, thereby offsetting generated signal distortion. CONSTITUTION: When conversion between a coder based on an MDCT and a heterogeneous coder occurs, an encoding device(101) codes additional information to restore an input signal encoded according to a coding method based on an MDCT. The encoding device prevents production of an unnecessary bit stream. The encoding device encodes minimum additional information.
Abstract:
PURPOSE: An apparatus for encoding and decoding integrated voice and audio signals is provided to combine a voice codec module with an audio codec module and selectively apply a codec module depending on a characteristic of an input signal, thereby showing excellent performance. CONSTITUTION: A module selecting unit(110) analyzes a characteristic of an input signal to select the first encoding module for encoding the first frame of an input signal. A voice encoding unit(130) encodes the input signal by selection of the module selecting unit to generate a voice bit string. An audio encoder(140) encodes the input signal by selection of the module selecting unit to generate an audio bit string. A bit stream generator(150) generates an output bit string from the audio encoder by selection of the module selecting unit.
Abstract:
본 발명은 음원 간 상호상관을 이용한 멀티트랙 다운믹싱 장치 및 그 방법에 관한 것으로, 개별 음원 신호를 각 음원 간 상호상관을 이용하여 상호상관 값이 높은 조합을 가지는 멀티트랙 신호로 다운믹싱함으로써, 다운믹싱된 멀티트랙 신호로부터 개별 음원을 더욱 충실하게 복원할 수 있는, 음원 간 상호상관을 이용한 멀티트랙 다운믹싱 장치 및 그 방법을 제공하고자 한다. 이를 위하여, 본 발명은 멀티트랙 다운믹싱 장치에 있어서, 개별 음원 신호를 주파수 대역으로 변환하기 위한 신호 변환 수단; 상기 변환된 개별 음원 신호로부터 각 음원 간 공간정보를 산출하기 위한 공간정보 산출 수단; 상기 산출된 각 음원 간 공간정보를 이용하여 상호상관 값에 따라 믹싱조합 정보를 결정하기 위한 믹싱조합 결정 수단; 및 상기 결정된 믹싱조합 정보에 따라 상기 변환된 개별 음원 신호를 멀티트랙 신호로 다운믹싱하기 위한 멀티트랙 다운믹싱 수단을 포함한다. 상호상관, 멀티트랙, 개별 음원 신호, 공간정보, 믹싱조합, 폐루프, 믹싱 매트릭스 정보, 멀티트랙 다운믹싱
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.