Abstract:
A method for compressing and decompressing a multi-channel signal using virtual source location information (VSLI) on a semicircular plane is provided. VSLI, rather than inter channel level difference (ICLD), is used as spatial cue information, thereby minimizing loss caused by quantization of spatial cue information, improving sound quality of a decompressed audio signal, and reproducing an excellent audio signal by reducing distortion upon decompression of an original signal at a decoder spectrum.
Title translation:VERFAHREN UND VORTHHTUNG ZUM CODIEREN UND DECODIEREN EINES MEHRKANALIGEN AUDIOSIGNALS UNTER VERWENDUNG VON VIRTUELLE-QUELLE-ORTSINFORMATIONEN
Abstract:
Provided is a method and apparatus for encoding/decoding a multi-channel audio signal. The apparatus for encoding a multi-channel audio signal includes a frame converter for converting the multi-channel audio signal into a framed audio signal; means for downmixing the framed audio signal; means for encoding the downmixed audio signal; a source location information estimator for estimating source location information from the framed multi-channel audio signal; means for quantizing the estimated source location information; and means for multiplexing the encoded audio signal and the quantized source location information, to generate an encoded multi-channel audio signal.
Abstract:
A method for visualization of multi-channel audio signals, a method for converting audio information by using a spatial cue, and an apparatus thereof are provided to visualize reproducing processes of the multi-channel signals and apply variation of the spatial cue to generation of the multi-channel signals, thereby reproducing realistic multi-channel audio signals and adjusting a position of a visual audio source of an audio signal. An apparatus for visualization of multi-channel audio signals, and converting audio information by using a spatial cue comprises the following parts: a SAC(Spatial Audio Coding) which is constituted with a SI decoder(102) for decoding the spatial cue and SAC decoder(101) for synthesizing multi-channel signals; a spatializer(103) and a visualizer(104) for receiving the decoded spatial cue information; and a displayer(105) for receiving a panning angle and power gain information of each channel.