Patent ID: 9112591
Filing Date: 2015-08-18
Classification: G10L,H04B,H04R,H04S

Abstract:
1. A method of generating a stereo signal from a down-mixed mono signal, the method comprising: decoding, from a bitstream, the down-mixed mono signal; decoding, from the bitstream, a plurality of parameters that represent characteristic relations between channels; estimating a parameter that represents a phase difference between one of a left signal and a right signal and the down-mixed mono signal, by using the decoded plurality of parameters; and up-mixing the decoding down-mixed mono-signal using the decoded plurality of parameters and the estimated parameter, wherein the plurality of parameters comprises a phase parameter, and the phase parameter is decoded by obtaining an index for a Largest Absolute Value (LAV) from the bitstream, obtaining the LAV for the phase parameter from the index, determining a Huffman Codebook based on the LAV, decoding symbols of the phase parameter from the determined Huffman codebook, and obtaining a quantized phase parameter from the decoded symbols in consideration of wrapping property of the phase parameter.