Patent ID: 9374128
Filing Date: 2016-06-21
CPC Classification: G10L,H04B,H04R,H04S

Claim Text:
1. An apparatus for obtaining parameters for use in decoding a down-mixed mono signal, the apparatus comprises: a processor configured: to decode, from a bitstream, a plurality of parameters including a channel level difference and an interchannel phase difference, wherein the interchannel phase difference indicates a phase difference between channels; and to estimate a parameter that represents a phase difference between the down-mixed mono signal and one of a left channel and a right channel, by using the decoded plurality of parameters, wherein the interchannel phase difference 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 based on the determined Huffman codebook, and obtaining a quantized phase parameter from the decoded symbols.