Audio encoding/decoding apparatus having watermark insertion/abstraction function and method using the same

Abstract From the Canadian patent

Disclosed herein are an audio encoding/decoding apparatus having a watermark insertion/abstraction function capable of inserting/abstracting watermark information into/from a bit stream in a digital audio and image encoding process and a method using the same. The high sound-quality audio encoding apparatus includes: a bit allocation unit for allocating a bit to each sub-band using an SMR (Signal to Mask Ratio) value of each sub-band in an inputted audio signal; a quantization unit for quantizing each sub-band sample in the inputted audio signal according to the number of bits allocated through the bit allocation unit; a watermark insertion unit for inserting watermark data in a location of …